Icom America - Downloads

Icom America - Downloads
Icom America - Downloads
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Icom America - Downloads
Download Index:
Are you having problems downloading the files listed here? Here's a
list of most common reasons:
PDF Instruction Manuals
PDF Product Brochures
Radio Images
Misc. Images
Misc. PDF Documents
1) Adobe® Acrobat® Reader is required to open PDF files. You can
download the Acrobat® Reader for free from the Adobe® Web site.
2) A PDF file may appear blank at first, if you are opening a PDF file
inside your Web browser. Give it some time to download completely.
3) If a PDF file, or an image file, opens inside your Web browser, and you
wish to download the file and save it to your disk instead, you can do one
of the following:
Multimedia
Apple® Macintosh®/Microsoft® Internet Explorer®:
Click and hold on the desired link until a dialog box opens (it
takes about 3 seconds). While still holding the mouse
button down, drag to and select "Download image to disk".
A "save" window will then appear; save the image to
wherever you want on your hard drive.
Miscellaneous
Microsoft® Windows®/Microsoft® Internet Explorer®:
Click with a right mouse button on the desired link and
select "Save target as" from the pop-up menu. A "save"
dialog box will then appear; save the file to your hard drive.
Netscape® Navigator®: Click with a right mouse button on
the desired link and select "Save link as" from the pop-up
menu. A "save" dialog box will then appear; save the file to
your hard drive.
4) A file compression/decompression utility is required to open ZIP files.
One of many popular compression utilities is WinZip.
Misc. PDF Documents
Amateur Radio Band Chart, and Grid Square Map
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Band Chart (70 KB PDF)
Grid Square Map (459 KB PDF)
Adobe® Acrobat® Reader™ is required to open PDF documents
SnapFlash Trunking
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What is SnapFlash (86 KB PDF)
http://www.icomamerica.com/downloads/default.asp (1 of 3) [9/6/2004 6:10:38 PM]
Icom America - Downloads
Marine SSB Single Sideband Simplified PDF
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Chapter 1: Introduction from Gordon West
Chapter 2: Start with a Good VHF Set
Chapter 3: The Marine SSB Single Sideband Service
Chapter 4: High Frequency Bouncing Radio Waves
Chapter 5: Single Sideband Range
Chapter 6: Band and Channel Selection
Chapter 7: Equipment Selection and Location
Chapter 8: Grounding (Counterpoise)
Chapter 9: Antennas
Chapter 10: Adding 12 Volts
Chapter 11: Eliminating Noise Interference
Chapter 12: Your FCC License
Chapter 13: Going on the Air
Chapter 14: Operating Procedures-Distress, Urgency & Safety
Chapter 15: Using Your SSB for Low-Cost E-mail
Chapter 16: Review: SSB Channel Designators Explained
Maritime Radiotelephone Public Correspondence Stations
International Voice Channel Designators (4-16 MHz)
SSB Marine Channels
Weather Fax
Adobe® Acrobat® Reader™ is required to open PDF documents
Multimedia
IC-746PRO
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PowerPoint Presentation (3.06 MB PPT)
IC-756PRO
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PowerPoint Presentation (3207 KB PPT)
IC-756PRO Flash presentation featured at Dayton 2001 Hamvention (1.28 MB SWF Macromedia
Flash)
IC-756PRO Flash presentation readme
IC-756PROII
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PowerPoint Presentation (2.5 MB PPT)
Miscellaneous
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Icom America - Downloads
Miscellaneous
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IC-756PRO Advanced Operating Guide (39 KB DOC - MS Word)
IC-756PROII Technical Report (3MB PDF)
Ham Radio Terms (85kb PDF)
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/downloads/default.asp (3 of 3) [9/6/2004 6:10:38 PM]
Icom America - Home Page
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Amateur Radios
This is how it all started. Back in the 50's, Icom was a leader in
early amateur radio transistor technology. Now watch how Icom
leads the way in ham technology with the latest in DSP.
Back to the Shack Savings!
Avionics Radios
Whether you're in the air or on the ground, Icom keeps you in
communications. Icom makes the world's best selling handheld
navcom radio - the IC-A22. Come see what else we make.
Press Room
About Icom
Press Releases
Consumer Radios
Family Radio Service (FRS) radios are taking the country by storm.
Icom FRS radios are doing that, and also taking the U.S. Marine
Corps by storm, too.
Help
Site Map
Search Engine
Help
Land Mobile Radios
These rugged, MIL SPEC radios offer a distinct advantage in price
and performance. Come see which radio the U.S. Army selected for
their soldier intercom.
Check out our new F43G portable...
Marine Radios
This has been another impressive year for Icom marine, winning
prestigious awards from Powerboat Reports and Practical Sailor,
and from NMEA. See our latest award for the industry-dominating
IC-M502 fixed mount VHF!
Receivers
Looking for a serious scanning receiver? This is the place. Icom
receivers come in all shapes and sizes, but they all have one thing
in common... they are simply the best.
News
Jul 6, 2004
Mar 22, 2004
Mar 22, 2004
Mar 22, 2004
Mar 22, 2004
Icom America, Inc. Files Rule Changing Petition with FCC
Icom puts B.I.I.S power in the palm of your hand
Icom America Systems combines power and price
Icom's M88 now available in Intrinsically Safe (I.S.) version.
Icom America, Inc. handheld radios offers a new direction
More news...
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/ [9/6/2004 6:12:05 PM]
Your opinion matters!
What features do you want
in a handheld radio? Now's
your chance to influence
Icom's next generation of
Amateur portable radios. Fill
out our questionnaire and
tell us what you're looking
for.
GP360 Chart Plotter
Icom America is currently
aware of a problem with the
GP360 chart plotter causing
the units to remain in sky
search mode.
Update: Icom America now
has a fix for the GP360. The
fix is a firmware update that
requires the units to be sent
in to Icom America. More..
Warranty Registration
You can now register your
new Icom radio online! Just
follow this link and fill out
the warranty form.
Icom America Systems
There are currently only a
handful of communications
providers – Kenwood,
Motorola and E.F Johnson capable of providing these
systems, making Icom
America part of an elite
group of Land Mobile
solution providers.
Icom America - Products
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Icom Product Line
Looking for the info about a specific radio? Choose the radio model number
from the alphabetical list of all current Icom radios:
Make a selection
Radio Archive
The menu above features the Icom products currently in production. We have
a Radio Archive on our Web site where you can look up features and
specifications on many of our discontinued radios.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/products/ [9/6/2004 6:12:06 PM]
Icom America - Support
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Icom America Technical Support
Welcome to the Icom America technical support area of the Web site. Here you will find frequently asked
questions pertaining to the Icom products, tech info from our technical support department, information
about discontinued Icom radios, service troubleshooting guides, list of authorized service centers, and
more. This page contains general information below, and a list of links to more resources on the left side of
this page.
Technical Support by E-Mail
Do you have additional questions not covered in our FAQs? Or need assistance in
setting up or operating your Icom radio? You can send e-mail to our Technical Support
Department.
Help
Site Map
Search Engine
Help
Warranty Registration
You can now register your new Icom radio online! All you need is the UPC bar code, the serial number,
and 5 minutes to fill out the form! Try it now!
Technical Support by Phone
To reach Icom America's Technical Support-by-Phone please call (425) 454-7619,
Monday - Friday, 8:00 AM - 4:30 PM Pacific Time. (Please note: this free support-byphone service is extremely popular. You may have to wait on hold during peak business
hours.)
It is our intention to expedite technical support calls as much as possible. Until the technology improves,
we request you do not utilize any of the Internet telephony programs to make technical calls to Icom
America Inc. The audio distortion, echoes and slow digital processing of voice does not allow for a
productive exchange of information. Please make these calls to Icom America Inc. on a standard
telephone set.
Parts and Manuals
To order Icom parts, service manuals, or replacement owners manuals, please contact
your local authorized Icom America dealer or call Icom America's Parts Department at
(425) 454-7619 Monday - Friday, 8:00 AM-5:00 PM Pacific Time. We accept Visa,
MasterCard, American Express, money order, or UPS C.O.D.
Instruction manuals for Icom radios (PDF files) are available for download here.
Repair Service
http://www.icomamerica.com/support/ (1 of 2) [9/6/2004 6:12:07 PM]
Icom America - Support
To check on the status of an Icom radio in for authorized Icom America servicing, please
call (425) 454-7619 Monday - Friday, 8:00 AM - 5:00 PM Pacific Time.
To send in an Icom radio for authorized Icom America servicing, make sure to read our
shipping instructions and Icom America service center addresses page.
Here's a list of information needed by Icom America Service Centers. You can print this form, fill it out, and
ship it with your radio to an authorized Icom America service provider.
Quick Jump
Looking for the info about a specific radio? Choose the radio model number from the alphabetical list of all
current Icom radios on our Products page.
Discontinued Icom radios can be found in the Archive.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/support/ (2 of 2) [9/6/2004 6:12:07 PM]
Icom America - Downloads
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Icom America - Downloads
TERMS & CONDITIONS
YOUR USE OF ANY DOWNLOADED INFORMATION ON THIS WEB SITE CONSTITUTES YOUR
AGREEMENT TO BE BOUND BY THESE TERMS AND CONDITIONS OF USE. Scroll down to read the
entire agreement.
Downloaded information on this Web site, including all of the features and
content (the “Web Site”) is a service of Icom, Inc. and its subsidiary Icom
America Inc., (the “Provider”) and all contents, information, and services set
forth within downloaded documents provided on or through this Web Site are
provided to you under the following terms and conditions. (“Terms of Use”).
1. Intellectual Property Rights. Except as expressly provided in these Terms
of Use, nothing herein shall be construed as conferring any license or right,
by implication or otherwise, under copyright or other intellectual property
rights. You agree that any downloaded information on this Web site is
protected by copyrights, trademarks, service marks, patents or other
proprietary laws of Icom, Inc. and/or Icom America Inc.
2. Use of Documents. You may use downloaded information for your own
reference purposes only. You may not reproduce, modify, publish or cause
said document to be downloaded by the public whether free or for charge,
including any pictures, illustration, data or other contents.
3. DISCLAIMER. THIS WEB SITE AND THE DOWNLOADED DOCUMENTS
ARE PROVIDED ON AN “ AS IS” BASIS. PROVIDER EXPRESSLY
I Agree
I Decline
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/downloads/terms_and_conditions.asp?/downloads/default.asp [9/6/2004 6:12:07 PM]
Icom America - Authorized Icom America Dealers
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Where to Buy
Wholesale Distributors
Locate an authorized Icom America dealer near you
Looking for a wholesale
distributor?
Please select a state and the product division to search:
State All
Products All
Search
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•Icom America Wholesale
Distributors
Icom FRS Radios, receivers or scanners
Any Icom America dealer is authorized to sell any Icom Family Radio Service
(FRS) radio, receiver or scanner. However, not all dealers may stock the item you
want. Please call or fax in advance before visiting your dealer of choice.
Icom America Authorized Dealers
If you are one of Icom America authorized dealers and would like your business,
home page or e-mail address added to this list, please contact your Icom District
Sales Manager. Thank you.
Government Sales
Icom America Inc. sells directly to federal, state and local government agencies.
Please click here for more information about Icom government sales.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/dealers/ [9/6/2004 6:12:08 PM]
Canadian Purchasers
Please visit Icom Canada's
web site for information
about Icom dealers in
Canada.
www.icomcanada.com
Dealer Opportunities
Dealer opportunities with
Icom America Inc. are
available. Find out how to
become an authorized
dealer for one of the fastest
growing radio companies.
Icom America - New Radios
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NEW RADIOS
CQ Interview
Select a radio from the list below.
AMATEUR: IC-7800 - The Transceiver - HF+6M
The ultimate ham transceiver is now a
reality in the Japanese market. Soon
coming to the American market. Read
more about this amazing new HF + 6M
transceiver.
Here's a PDF
document of CQ
Magazine's recent
interview with Icom Inc.
president Tokuzo
Inoue, JA3FA.
AMATEUR: IC-703 - HF/6 Meter QRP Rig
IC-703 is Icom's product for the QRP enthusiasts.
Focusing on QRP performance rather than an all-inone solution, the IC-703 covers the Amateur Bands
160m to 6m*. Depending on the power supply the
rig is capable of 5W @ 9.6VDC and 10W @
13.8VDC, plus it has an internal antenna tuner.
Icom engineers have addressed a lot of the concerns about current
consumption and other comments gathered over the past two years regarding
QRP performance. While it looks and feels like the IC-706MKIIG, this rig is a
QRP version, not a replacement.
Warranty Registration
You can now register
your new Icom radio
online! All you need is
the UPC bar code, the
serial number, and 5
minutes to fill out the
form! Try it now!
Read more about the new IC-703.
*6m is not available depending on version
Upcoming Shows
AMATEUR: IC-2720H - 2m / 70cm Dual Bander
The IC-2720H is a new, advanced 2 M/70
cm mobile dual bander. It features a
separate control head with a wide viewing
angle display for mobile flexibility, user
adjustable brightness controls and
selectable amber or green colored display.
Two microphone jacks - one on the control
head, one on the main unit. Independent tuning, AF and squelch knobs for
each band. V/V, U/U, V/U, U/V operation. And much more.
Go to the IC-2720H page.
AVIONICS: IC-A5 & IC-A23 VHF Handhelds
http://www.icomamerica.com/new/ (1 of 6) [9/6/2004 6:12:13 PM]
Here's a calendar of
the upcoming trade
shows. Catch Icom at
the following air shows,
boat shows, hamfests,
and more.
Special Savings
Don't miss these
special savings.
Available only for a
limited time!
Icom America - New Radios
Icom's IC-A23 has been awarded "Best VHF
Handheld" by The Aviation Consumer
magazine in its Gear of the Year issue,
August 2002. The IC-A23 offers VOR
navigation and is compact and water
resistant to JIS-4 grade. Its sister radio, the
IC-A5, is a com only version of the IC-A23.
Both radios are easy to operate and feature
large, clear LCD displays. Received
conversations can be recorded and played
back with the built-in voice recorder. With a
large capacity rechargeable Ni-MH battery as
a standard equipment, you can talk longer
than ever before! Icom is the name pilots
have come to know and trust. Simply the
Best!
Go to the IC-A5 page.
Go to the IC-A23 page.
CONSUMER: IC-F21BR & IC-F21GM
Icom's latest UHF portable radios.
The IC-F21BR offers 3 services in 1 radio: FRS (Family
Radio Service), GMRS (General Mobile Radio Service) and
BRS (Business Radio Service)!
The IC-F21GM is a perfect choice for family or associates. It
offers the FRS (Family Radio Service) and GMRS (General
Mobile Radio Service) in one radio.
LAND MOBILE: IC-FR4000 Repeater
This ultimate repeater is feature rich,
offering value without compromise.
50 watts of power and 100% duty cycle;
internal space for a duplexer and isolator;
DTMF remote capable; 32 channels, Switchable wide/narrow 12.5/25 kHz; and
much more.
Go to the IC-FR4000 page.
LAND MOBILE: Icom America Systems
http://www.icomamerica.com/new/ (2 of 6) [9/6/2004 6:12:13 PM]
Employment
A chance to work for
one of the fastest
growing radio
companies awaits you.
Click here to go to the
employment
opportunities page.
Press Releases
This section contains
the official press
releases by Icom
America Inc.
Icom America - New Radios
Icom America Inc. announces the creation of Icom
America Systems, an enterprise of their Land Mobile
Division. This enterprise will create high quality "turn key
systems" that can be sold and installed by land mobile
dealers as innovative solutions for their customers.
There are currently only a handful of communications
providers – Kenwood, Motorola and E.F Johnson capable of providing these systems, making Icom
America part of an elite group of Land Mobile solution
providers.
Read the complete press release here.
Visit the Icom America Systems Web page for more details.
LAND MOBILE: IC-F121/F221 Series Mobiles
Icom IC-F121 series mobiles.
Powerful, rugged and simple to use with
advanced capabilities. Available in VHF or
UHF versions, and as either simple 8
channel or more advanced 128 channel
versions. These mobiles offer power,
flexibility, and dependability that can perform
in any environment.
Go to the IC-F121 (VHF) page.
Go to the IC-F121S (VHF) page.
Go to the IC-F221 (UHF) page.
Go to the IC-F221S (UHF) page.
LAND MOBILE: IC-F30GT/GS (VHF) and IC-F40GT/GS (UHF)
PC programmable portables.
Intrinsically safe version now available
Attention petrochemical industry: Icom's ICF30G series professional series radios now
come in an intrinsically safe version. Contact
your authorized Icom dealer today!
Go to the IC-F30GT and the IC-F30GS (VHF) page.
Go to the IC-F40GT and the IC-F40GS (UHF) page.
http://www.icomamerica.com/new/ (3 of 6) [9/6/2004 6:12:13 PM]
Icom America - New Radios
MARINE: IC-M88 - VHF Marine Transceiver
Icom's new, compact marine VHF is easier to operate and
fits more comfortably in the hand.
Nix the bricks! This little marine VHF workhorse is incredibly
compact, yet it feels comfortable in the hand. Go up to 24 hours
without a recharge*. Built military rugged (MIL SPEC), Icom's
IC-M88 is completely submersible and offers a 1700 mAh Li-Ion
battery. It's the most powerful, longest lasting Li-ion battery in
the industry. The IC-M88 offers a whole slew of options and
accessories, from waterproof microphones to full headsets -great for the commercial mariner! Yet, this radio is as easy to use as any other
Icom handheld - which is to say it offers superior one-handed operation - so
any recreational boater will appreciate its friendly interface. 5 Watts of power
really gets your message out! For ease of use, powerful and long lasting Li-ion
battery, and sheer performance, Icom's IC-M88 can't be beat. Compare and
you'll see why Icom is best. Simply the best.
* 5% TX, 5% RX, 90% standby
Go to the IC-M88 page.
MARINE: IC-M602 - VHF Marine Transceiver
Icom's new, ULTIMATE marine VHF
For those who insist on the best, Icom proudly
announces its new IC-M602. JIS-7 waterproof
(submersible); built-in ITU class D DSC, with
independent channel 70 watch; standard 4" tall
front panel, to easily blend in to your cabin
console or dashboard; full key pad, for fast access to all radio functions; builtin, 22 Watt hailer (most powerful in the industry); built-in foghorn, with 4
selectable patterns; large LCD with 7 levels of backlighting; built-in NMEA
input/output jack; superior receiver performance; detachable smart-style hand
microphone, for easier installation; and much more. Add up to 2 optional
COMMANDMIC® remote control microphones and you'll have 3 radio station /
intercom points onboard!
Combine the IC-M602 with the new, same sized IC-M802 marine SSB cousin
and you’ll have the ultimate communications station. They look as good as
they perform!
Go to the IC-M602 page.
MARINE: IC-M802 Digital Marine SSB Radio
http://www.icomamerica.com/new/ (4 of 6) [9/6/2004 6:12:13 PM]
Icom America - New Radios
All new digital SSB with remoteable
control head offers the clearest
reception ever! The ultimate SSB is
very user friendly and easy to
install.
Big dials, a large dot-matrix LCD and
well spaced buttons make Icom’s
newest SSB a snap to operate, even in
rough seas. A full key pad, over 1300
channels, wide band RX, Ham band
TX (license required) and RX included, one-touch e-mail access (a SSB first!)
with no optional filters required, front panel headset jack (to keep from waking
up the crew), and many more thoughtful features make this remoteable control
head SSB Icom’s most advanced ever.
Combine the IC-M802 with the new, same sized IC-M602 marine VHF cousin
and you’ll have the ultimate communications station. They look as good as
they perform!
New! 2002's Best of Show award, AND 2002's Best SSB Radio Telephone
award given to the IC-M802 by the National Marine Electronics
Association (NMEA). The prestigious NMEA award once again goes to Icom
(11/02)!
Go to the IC-M802 page.
RECEIVERS: IC-R5 - Compact, Wideband Handheld Receiver
Compact, Wideband Handheld Receiver. Coming soon.
Winning Performance.
Get winning performance with Icom’s new IC-R5. Crisp,
clear audio. Super wide tuning range. A large, easy-to-read
LCD display with the visual information you need - like
operating status, signal strength, battery indicator, and
alphanumeric naming for the 1250 memory channels
(including 200 auto-write scan memories, and 25 scan edge
pairs). Weather Alert keeps you informed of any weather
emergencies. All in a compact, weather resistant package.
Go to the IC-R5 page.
RECEIVERS: IC-R3 Handheld Receiver
http://www.icomamerica.com/new/ (5 of 6) [9/6/2004 6:12:13 PM]
Icom America - New Radios
Handheld audio/video receiver.
The all new video capable IC-R3! Never before has a
handheld receiver given you as much information as the ICR3. Not only can you see receiver's operating status and
spectrum scope, you can display broadcast visual information:
TV program, picture from wireless cameras and more. The ICR3 is great for sporting events, security, Amateur TV, and you
can watch your favorite TV program at anytime, anywhere.
But, with a frequency coverage of 0.495-2450 MHz**, and AM,
FM, WFM modes built-in, the IC-R3 is not your average TV
receiver! You've never seen anything like it!
Go to the IC-R3 page.
** U.S. cellular telephone frequencies blocked.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/new/ (6 of 6) [9/6/2004 6:12:13 PM]
Icom America - How to Contact Icom
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Contact Us
Icom International
Icom America Inc.
2380 116th Ave NE
Bellevue, WA 98004
Icom, Inc. (Japan)
1-1-32, Kamiminami, Hirano-ku,
Osaka, 547-0003, Japan
Phone: 06 6793 5302
Fax: 06 6793 0013
Phone: (425) 454-8155
Fax: (425) 454-1509
Customer Service: (425) 454-7619
Online Technical Support
Are you looking for Icom America's online Technical
Support? Just follow the "Support" link at the top
navigation bar, or click here.
Technical Support by Phone
To reach Icom America's Technical
Support-by-Phone please call (425)
454-7619, Monday - Friday, 8:00 AM 4:30 PM Pacific Time. (Please note:
this free support-by-phone service is
extremely popular. You may have to wait on hold during
peak business hours.)
It is our intention to expedite technical support calls as
much as possible. Until the technology improves, we
request you do not utilize any of the Internet telephony
programs to make technical calls to Icom America Inc.
The audio distortion, echoes and slow digital processing
of voice does not allow for a productive exchange of
information. Please make these calls to Icom America
Inc. on a standard telephone set.
Technical questions, or questions regarding Icom
products can be submitted via e-mail to our tech support
staff here.
Parts and Manuals
Icom Canada
150-6165 Highway 17
Delta, B.C., V4K 5B8, Canada
Phone: (604) 952-4266
Icom (Australia) Pty. Ltd.
A.C.N. 006 092 575
290-294 Albert Street
Brunswick, Victoria, 3056, Australia
Phone: 03 9387 0666
Fax: 03 9387 0022
Asia Icom Inc.
6F No. 68, Sec.1 Cheng-Teh Road,
Taipei, Taiwan R.O.C.
Phone: (02) 2559 1899
Fax: (02) 2559 1874
Icom (Europe) GmbH
Himmelgeister Str. 100
D-40225 Düsseldorf, Germany.
Phone: 0211 346047
Fax: 0211 333639
Icom Spain S.L.
Crta. de Gracia a Manresa km. 14,750
08190 Sant Cugat Del Valles Barcelona, Spain
Phone: (93) 590 26 70
Fax: (93) 589 04 46
E-mail: [email protected]
Icom (UK) Ltd.
Unit 9, Sea St.
Herne Bay, Kent, CT6 8LD, U.K.
Phone: 01227 741741
Fax: 01227 741742
Icom France S.a
Zac de la Plaine, Rue Brindejonc des Moulinais
BP 5804, 31505 Toulouse Cedex, France
Phone: 561 36 03 03
Fax: 561 36 03 00
http://www.icomamerica.com/mailbox/ (1 of 3) [9/6/2004 6:12:14 PM]
Icom America - How to Contact Icom
To order Icom parts, service manuals,
or replacement owners manuals,
please contact your local authorized
Icom America dealer or call Icom
America's Parts Department at (425)
454-7619 Monday - Friday, 8:00 AM-5:00 PM Pacific
Time. We accept Visa, MasterCard, American Express,
money order, or UPS C.O.D.
Instruction manuals for Icom radios (PDF files) are
available for download here.
Repair Service
To check on the status of an Icom
radio in for authorized Icom America
servicing, please call (425) 454-7619
Monday - Friday, 8:00 AM - 5:00 PM
Pacific Time.
To send in an Icom radio for authorized Icom America
servicing, make sure to read our shipping instructions,
and Icom America Service Center addresses page.
Prices
Icom America Inc. sells mainframes only to authorized
Icom America dealers. For the latest in Icom radio and
parts prices, please contact an authorized Icom America
dealer:
Authorized Icom America dealers
Other
To order free brochures about any current Icom radio,
please call (425) 450-6088 at any time.
To contact Icom America's main switchboard, please call
(425) 454-8155 Monday through Friday, 8:00 AM to 5:00
PM Pacific Time.
Technical questions, or questions regarding Icom
products can be submitted via e-mail to our tech support
staff here.
Thank you for using Icom radios!
Financial Information
http://www.icomamerica.com/mailbox/ (2 of 3) [9/6/2004 6:12:14 PM]
Icom America - How to Contact Icom
Icom America, Inc. is listed with Dun & Bradstreet. Dun &
Bradstreet maintains the world's largest business
database containing information about more than 64
million businesses worldwide including 13 million in the
United States.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/mailbox/ (3 of 3) [9/6/2004 6:12:14 PM]
Icom America - Special Savings
home | products | support | downloads | where to buy | what's new
Links
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Specials
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What's New
Government Sales
Trade Shows
Employment
Sales in Mexico
Special Savings
Special Amateur savings
Special Avionics savings
Press Room
About Icom
Press Releases
Special Receiver savings
Help
Site Map
Search Engine
Help
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/specials/ [9/6/2004 6:12:15 PM]
Icom America - Account Login
home | products | support | downloads | where to buy | what's new
Support
Service Centers
Manuals
Documents
FAQs
E-mail Support
Forums
Warranty
Archive
Troubleshooting
Press Room
About Icom
Press Releases
Warranty Registration
Icom America Account Login
E-mail
Registering your Icom product requires a few simple steps.
Password
To get started, login to your Icom America account using your
e-mail address and password. If you do not have an Icom
America account, please create one to continue.
> Create New Account
Login
Forgot your password?
Icom America, Inc. does not share the information collected
with any third parties.
Help
Site Map
Search Engine
Help
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/warranty/LoginUser.asp [9/6/2004 6:12:16 PM]
Icom America - Government Sales
home | products | support | downloads | where to buy | what's new
Links
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Specials
Warranty
What's New
Government Sales
Trade Shows
Employment
Sales in Mexico
Government Sales
Press Room
About Icom
Press Releases
If you are a GSA purchaser and have a question on one of the following: price
and availability, status of an order, Icom product information, or if you wish to get
a tracking number; please contact our Customer Service Department at (425) 4548155.
Help
Site Map
Search Engine
Help
Icom America Inc. sells directly to federal, state and local government agencies.
Federal Government Sales
To place an order, or to gather more information about specific Icom products,
please call our Government Sales Support Desk at (425) 450-6090. You may also
send a fax to 425-454-1509 or email [email protected]
We accept Visa, Master Card or American Express credit cards for purchases.
GSA Ordering Information
Address: Icom America Inc.
2380 116th AVE NE
Bellevue, WA 98004
GSA Contract: GS-35F-0109L expires 12/14/05
Tax ID: 91-1083924
DUNS: 037999331
Cage Code: 62526
CCR Registered: Yes (Central Contractor Registration)
Business Size: Large
Freight: FOB Destination
(UPS ground no charge, HI and AK ups blue no charge)
Terms: 3% 15, Net 30 (purchase order) (no terms on credit card orders)
Minimum Order: Purchase Order = $100.00 new accts
(credit card orders = no minimum)
Delivery Schedule: 132-8 Radios and Accessories = 90 days
Larger quantities: 120 days
State and Local Government Sales
If you are a state or a local government purchaser, and have a question on one of
the following: price and availability, status of an order, Icom product information, if
you wish to place an order, or get a tracking number; please contact our
Customer Service Department at (425) 454-8155.
We accept Visa, Master Card or American Express credit cards for purchases.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/governmentsales/ [9/6/2004 6:12:17 PM]
Icom America - Trade Show Calendar
home | products | support | downloads | where to buy | what's new
Links
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Icom Trade Show Calendar
Catch Icom at the following air shows, boat shows, hamfests, and more. Updated through end of February
2005. PLEASE NOTE: Events on this page are subject to change without notice. Icom is not responsible
for any expenses of any type incurred due to changes, cancellations, or additions to the schedule.
Amateur:
Avionics:
Land Mobile:
Marine:
Sept 4-5, 2004
Shelby Hamfest
Shelby, NC
Oct 21-23, 2004
AOPA Expo
Long Beach, CA
Sept 13-16, 2004
National Guard Assoc of
the US
Las Vegas, NV
Sept 15-16, 2004
Henry's Show
Orlando, FL
Oct 15-17, 2004
Pacificon
San Ramon, CA
Feb 26-27, 2005
N.W. Av. Conference
Puyallup, WA
Nov 6-7, 2004
Stone Mountain Hamfest
2003
Lawrenceville, GA
Nov 13-14, 2004
Ft. Wayne Hamfest
Fort Wayne, IN
Dec 4-5, 2004
Tampa Bay Hamfest
Tampa Bay, FL
Feb 5-6, 2005
Miami Tropical
Hamboree
Miami, FL
Feb 11-13, 2005
Orlando Hamcation
Orlando, FL
Oct 6-9, 2004
ITA Wireless
Washington, DC
Oct 21, 2004
Fall Technology Show
Fort Hood, TX
Oct 31-Nov 4, 2004
NAPT Annual
Conference & Trade
Show
Cincinnati, OH
Nov 13-15, 2004
IACP (Chiefs of Police)
Los Angeles, CA
Nov 30-Dec 2, 2004
Ft. Gordon Annual
Ft. Gordon, GA
Sept 16-19, 2004
Newport Boat Show
Newport, RI
Oct 7-11, 2004
U.S. Sailboat Show
Annapolis, MD
Oct 14-17, 2004
U.S. Powerboat Show
Annapolis, MD
Oct 20-23, 2004
NMEA Convention
Sanibel, FL
Oct 25-27, 2004
IBEX
Miami Beach, FL
Oct 28-Nov 1, 2004
Ft. Lauderdale Boat
Show
Ft Lauderdale, FL
Nov 7-11, 2004
Marine One
Las Vegas, NV
Nov 11-13, 2004
Pacific Marine Expo
Seattle, WA
Nov 18-20, 2004
Kellog Marine Dealer
Trade Show
Ledyard, CT
Dec 1-3, 2004
WorkBoat Show
http://www.icomamerica.com/calendar/ (1 of 2) [9/6/2004 6:12:18 PM]
Icom America - Trade Show Calendar
New Orleans, LA
Jan 1-9, 2005
New York Int'l Boat Show
New York, NY
Jan 14-23, 2005
Seattle Int'l Boat Show
Seattle, WA
Jan 20-23, 2005
Sail America
Philadelphia
Philadelphia, PA
Feb 2-6, 2005
Atlantic City Power Boat
Show
Atlantic City, NJ
Feb 3-6, 2005
Strictly Sail Chicago
Chicago, IL
Feb 17-25, 2005
Miami Int'l Boat Show
Miami, FL
Feb 23-27, 2005
West Marine U.
Orlando, FL
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/calendar/ (2 of 2) [9/6/2004 6:12:18 PM]
Icom America - Employment Opportunities
home | products | support | downloads | where to buy | what's new
Links
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Help
HR Contact
There are currently no job openings available.
If you have any questions regarding employment with Icom America, Inc., you may contact our Human
Resources department below.
Attn: HR Dept.
Icom America Inc.
2380 116th Ave. NE
Bellevue, WA, 98004
Fax: (425) 454-1509
E-mail:
[email protected]
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/employment/ [9/6/2004 6:12:19 PM]
Icom America - en Español
home | products | support | downloads | where to buy | what's new
Links
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Specials
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Government Sales
Trade Shows
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Sales in Mexico
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Help
Icom America Inc.
Icom America Inc., con base en Bellevue, Washington, USA, anuncia la
apertura de su nueva oficina de apoyo al cliente y ventas en México, ubicada
en México D.F. Esta es una demostración de nuestro interes en el mercado
Mexicano.
ICOM, uno de los lideres en fabricación de radios de dos vías a nivel mundial,
anuncia su nueva linea de portátiles F50/F60 para uso terrestre, sumergible,
trabaja en cualquier condición ambiental, cumplen con las especificaciones
militares aprobadas en USA, de operación sencillia y con precios muy
competitivos.
La nueva serie F de ICOM incluye los modelos: Portátiles IC-F43TR (UHF) y
Móviles IC-F621TR(UHF) para uso convencional y troncalizado, asicomo los
modelos IC-F121S (VHF) y IC-F221S (UHF) los cuales tienen capacidad para
8 y 128 canales, con pantalla, funciones programables por el usuario, escaneo
normal y prioritario, estándares CTCSS / DTCSS y capacidad opcional para
sistemas troncalizados.
Con ICOM usted satisface todas sus necesidades de radio comunicación, el
portafolio de productos ICOM incluyen los siguientes radios: Terrestre,
Aviacion, Marinos, Aficionados, Receptores, Repetidoras y Sistemas
Troncalizados.
Para mayor información sobre los productos ICOM, favor de contactar a
nuestro representante en México, Ing. Mario Bravo a las oficinas de ICOM en
México:
Tel. (555) 547-6814
Fax (555) 547-6818
[email protected]
Gracias por su interés en radios Icom.
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/mexico.asp [9/6/2004 6:12:20 PM]
Icom America - Company Profile
home | products | support | downloads | where to buy | what's new
Links
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Company Overview
Icom America's parent company, Icom, Inc.,
was founded in 1954 by Tokuzo Inoue in
Osaka, Japan. Icom Incorporated is a
publicly held Japanese corporation; its stock
is traded on the Tokyo and Osaka Stock
Exchange. Icom, Inc. began as an
engineering and manufacturing company in
the business of designing, engineering, and
manufacturing highly advanced, compact
solid-state radio equipment for use in the
Amateur industry. The company's product
line has since expanded to include
communications equipment and products
based in the Marine, Avionics and Land
Mobile industries.
Icom Inc. has sales offices and branch offices
all over the world including Australia,
Germany, France, United Kingdom, Spain, Canada and of course the U.S. Icom America is Icom Inc.'s
largest subsidiary company and is the U.S. distributor. Icom America was incorporated in October of 1979
and has continued to gain market share in each of its five major divisions: Amateur, Aviation, Land Mobile,
Marine and Receivers.
Amateur:
Icom is one of three companies who dominate the worldwide amateur radio market. Currently, Icom enjoys
a significant market share position in the amateur business, both worldwide and in the U.S. Currently Icom
makes amateur radio products for use in long and short-range communications. Icom also makes
advanced technology products allowing worldwide communication relayed through space satellites owned
by amateur organizations and manufactures a series of short-wave receivers used for hobby, industrial and
government applications.
Aviation:
Icom has introduced aircraft handheld, mobile and base radios for use onboard and in field aviation use.
These radios are used as primary ground communication as well as ground to air and backup aircraft
communication equipment. Icom introduced the first navigation handheld, which also provides navigation
information and direction location information. Icom has a current market share in the 50% range.
Land Mobile:
Icom joined the land mobile industry approximately nine years ago. This equipment is used in such areas
as fire, public safety activities, as well as security, construction and farming communication. Icom currently
supplies the radio system used by the U.S. Army for inter-squad communication known as the Soldier
Intercom System.
Marine:
Icom has successfully introduced a series of communications equipment for use in the marine industry.
Icom's equipment includes long range, ship-to-shore, side band transceivers for worldwide
communications from shipboard operations as well as short range VHF communications equipment. In
addition, Icom has produced a series of highly advanced, very compact, handheld transceivers for use in
communication on marine vessels as well as between marine vessels and shore-to marine applications.
While Icom enjoys significant market share in the industry (top three position) Icom has also won
numerous awards for its marine VHF handheld radios as decided and voted by the marine dealers
http://www.icomamerica.com/profile/ (1 of 2) [9/6/2004 6:12:22 PM]
Icom America - Company Profile
Independent Dealer Association - NMEA. This is a highly prestigious award and reflects the industry's
confidence in Icom handheld technology and quality.
Receivers:
Icom's communication receivers range from a small, pocketsize handheld to top-of-the-line super wide
range receivers like the IC-R9000L. Icom also developed the unique receiver in a box (PCR1000) which
turns your PC into a receiver. Icom continues to develop and manufacture receivers using new and
innovative technology.
Icom America Inc.
2380 116th Ave NE
Bellevue, WA 98004
Phone: (425) 454-8155
Fax: (425) 454-1509
Customer Service: (425) 454-7619
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/profile/ (2 of 2) [9/6/2004 6:12:22 PM]
Icom America - Press Releases
home | products | support | downloads | where to buy | what's new
Links
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Government Sales
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Sales in Mexico
2004 Press Releases
Date
Title
Jul 6, 2004
Icom America, Inc. Files Rule Changing Petition with FCC
Mar 22, 2004 Icom puts B.I.I.S power in the palm of your hand
Mar 22, 2004 Icom America Systems combines power and price
Mar 22, 2004 Icom's M88 now available in Intrinsically Safe (I.S.) version.
Mar 22, 2004 Icom America, Inc. handheld radios offers a new direction
Press Room
About Icom
Press Releases
Mar 22, 2004 Icom brings back the walkie talkie
Help
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Help
Mar 22, 2004 Icom America, Inc. Announces new GSA Customer Service Specialist
Mar 22, 2004
Icom puts advanced high-frequency communication where you need it
most
Mar 10, 2004
Icom America, Inc. promotes internal staffers to Regional Sales
Managers
Mar 10, 2004
Icom America, Inc. announces new district sales manager for Upper
Midwest.
Feb 1, 2004
Icom Amateur Radios to Keep Subaru Challenge Team in Contact
During 2004 Alcan Winter Rally
Jan 21, 2004
EchoLink® over D-STAR allows VoIP Amateur Radio. Another Amateur
Radio first by Icom!
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/press/ [9/6/2004 6:12:23 PM]
News Archive
2004 Press Releases
2003 Press Releases
2002 Press Releases
2001 Press Releases
2000 Press Releases
Icom America - Sitemap
home | products | support | downloads | where to buy | what's new
Links
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Government Sales
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Sales in Mexico
Press Room
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Press Releases
Help
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Help
Support
Contact Us
Dealers
What's New
Misc.
Consumer
Support Main
Contact Us
Dealers Main
What's New
Company
Overview
Consumer
Home
Service Centers
Technical
Support Phone
Numbers
Dealer
Opportunities
Press Releases
Icom Sales in
Mexico
What is FRS?
Archive of
Discontinued
Icom Radios
E-mail Support
Troubleshooting
Guides
Wholesale
Distributors
Icom America
Dealers by
State
FAQs Frequently
Asked
Questions
Special
Savings
Employment
Opportunities
Where can I use
For Government an FRS radio?
Purchasers
Search
Trade Show
Calendar
Icom Product
Line
Warranty
Registration
Tech
Documents
Wireless LAN
Instruction
Manuals
E-mail Support
Warranty
Registration
Amateur
Avionics
Land Mobile
Marine
Receivers
Amateur Home
Avionics Home
Land Mobile
Home
Marine Home
Receivers Home
HF (short-wave)
Ground Based
Com Radios
Handheld VHF
Radios
PC Controlled
Receivers
Mounted VHF
Radios
Handheld
Receivers
Side Band
Radios
Tabletop
Receivers
Air Band
Specialty
Commercial
Radios
Third Party
Software for
Icom Receivers
Commercial
Radar
Single Band
Handhelds
Single Band
Mobiles
Handheld Com
Radios
VHF Portables
UHF Portables
VHF Mobiles
Handheld Nav
Com Radios
Dual Band/Multi
Band Handhelds Mounted
Radios
Dual Band
Mobiles
UHF Mobiles
Repeaters
http://www.icomamerica.com/sitemap.asp (1 of 2) [9/6/2004 6:12:24 PM]
Icom America - Sitemap
Power Supplies
Marine
Linear Amplifiers
Satellite
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
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Icom America - Search
home | products | support | downloads | where to buy | what's new
Links
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Government Sales
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Search
Enter your search words or phrase below:
Search:
Search
Press Room
About Icom
Press Releases
Help
Site Map
Search Engine
Help
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/search/ [9/6/2004 6:12:24 PM]
Icom America - Help
home | products | support | downloads | where to buy | what's new
Links
Contact Us
Specials
Warranty
What's New
Government Sales
Trade Shows
Employment
Sales in Mexico
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Press Releases
Help
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Help
Icom America Inc. - Help
Welcome to the Icom America Inc. Web site! Your Web experience will be
more enjoyable if you keep the following in mind while browsing our site:
Navigation bar at the top of the page is accessible throughout the site. The
navigation bar features drop-down menus. Please check your Web browser's
Java Script settings if the drop-down menus are not working.
The menu on the left side is topic specific. The left menu changes to display
relevant links depending on which part of the site you are at.
All Icom products are divided into divisions accessible from the Products dropdown menu. Further, products in each division are subdivided into categories.
The categories will become visible in the left menu once you select the product
division of interest. From there you can select a category of interest, or directly
select an individual product from the left menu. By using this menu
arrangement the information about each Icom product is no more than 2 clicks
away from the home page.
Site Map and Search are always accessible in the upper right corner.
Thank you for your interest in Icom products!
All contents ©1996-2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Terms of use
http://www.icomamerica.com/help.asp [9/6/2004 6:12:25 PM]
Icom America - Downloads - Instruction Manuals
home | products | support | downloads | where to buy | what's new
Links
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Government Sales
Trade Shows
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Icom America - Downloads - Instruction Manuals
Please note that this page contains a complete list of all available Icom instruction manuals in PDF
format. Instruction manuals for radios other than those listed above are not available as PDF files.
Amateur Radios Instruction Manuals
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AG-2400
IC-207H
IC-208H
IC-2100H
❍ IC-2100H Manual Addendum
IC-2200H
IC-2720H
❍ IC-2720H Manual Addendum
IC-2800H
IC-2GXAT
IC-2SA / IC-3SA
IC-703
❍ IC-703 60m Addendum
IC-706MKIIG
IC-718
IC-746
❍ IC-746 Manual Addendum
❍ IC-746 Manual Erratum
IC-746PRO
IC-751
IC-756
IC-756PRO
IC-756PROII (Updated 10/30/2003)
IC-775DSP
IC-775DSP maintenance manual
IC-78
IC-7800
IC-910H
IC-PW1
IC-Q7A
IC-T2H
IC-T7H
IC-T22A
IC-T81A
IC-T90A
IC-V8
IC-V8000
IC-W2A
IC-W32A
ID-1
PS-125
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Marine Radios Instruction Manuals
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FP-561
IC-GM1500
IC-M1
IC-M1V
IC-M2A
IC-M3A
IC-M32
IC-M15
IC-M127
IC-M302
IC-M402 / IC-M402S
IC-M402A / IC-M402SA
IC-M45A
IC-M502
IC-M502A
IC-M56
IC-M57
IC-M59
IC-M602
IC-M80
IC-M88
IC-M700PRO
IC-M710
IC-M710RT
IC-M802
MR-570R
Receivers Instruction Manuals
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IC-PCR100
IC-PCR1000
IC-R2
IC-R3
IC-R5
IC-R5 Hot 100 SWL List
IC-R10
IC-R20
IC-R75
IC-R8500
IC-R9000L
Icom America - Downloads - Instruction Manuals
Options and Accessories
Instruction Manuals
Avionics Radios Instruction Manuals
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IC-A3
IC-A4 Ver01
IC-A4 Ver02
IC-A5
IC-A22
IC-A23
IC-A110
IC-A200
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Family Radio Service / General Mobile
Radio Service (FRS / GMRS) Instruction
Manuals
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IC-4088A.pdf
Land Mobile Radios Instruction Manuals
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IC-F3GT and IC-F3GS
IC-F3/S and IC-F4/S
IC-F4GT and IC-F4GS
IC-F4TR
IC-F11BR and IC-F21BR
IC-F21
IC-F21GM
IC-F21S
IC-F30GT and IC-F30GS
IC-F40GT and IC-F40GS
IC-F30LT and IC-F40LT
IC-F121 and IC-F221
IC-F121S and IC-F221S
IC-F310 / IC-F320 / IC-F410 / IC-F420
IC-F310S / IC-F320S / IC-F410S / IC-F420S
IC-F50 / IC-F60
IC-F510 / IC-F520 / IC-F610 / IC-F620
IC-F621
IC-F1020
IC-F2020
IC-F1500 and IC-F2500
IC-V220 and IC-U220
http://www.icomamerica.com/downloads/manuals.asp (2 of 3) [9/6/2004 6:12:27 PM]
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AH-4
AT-130
AT-140
AT-180
BC-137
BC-143
BC-143 & BC-144
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RS-R75
UT-111
UX-120
UX-R9000
Icom America - Downloads - Instruction Manuals
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IC-R8500
IC-R9000L
Avionics Radios Brochures
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Icom America - Downloads - Product Brochures
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IC-A200B and IC-A200M
Options and Accessories Brochures
Land Mobile Radios Brochures
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IC-F4
IC-F4S
IC-F4GT and IC-F4GS
IC-F4TR
IC-F43TR
IC-F11 and IC-F21
IC-F11 and IC-F21 (Spanish)
IC-F11S and IC-F21S
IC-F30GT and IC-F30GS
IC-F40GT and IC-F40GS
IC-F43GT and IC-F43GS
IC-F43GT and IC-F43GS (Spanish)
IC-F121 and IC-F221
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IC-F121S and IC-F221S
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IC-F320 and IC-F420
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IC-F50 and IC-F60
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Soldier Intercom
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Icom America - Downloads - Product Brochures
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COMMON PREFIXES OF COUNTRIES (2004)
Ø = Zero; “I.” = Island; “Is.” = Islands
UPDATED 4/04
PREFIX
COUNTRY
PREFIX
COUNTRY
PREFIX
COUNTRY
PREFIX
COUNTRY
PREFIX
COUNTRY
1AØ
1S, 9MØ
3A
3B6, 3B7
3B8
3B9
3C
3CØ
3D2
3D2
3D2
3DA
3V
3W
3X
3Y
3Y
4J-4K
4L
4P-4S
4U_UN
4U_ITU
4W
4X, 4Z
5A
5B
5H-5I
5N-5O
5R-5S
5T
5U
5V
5W
5X
5Y-5Z
6V-6W
6Y
7O
7P
7Q
7T-7Y
8P
8Q
8R
9A
9G
9H
9I, 9J
9K
9L
9MØ
9M2, 9M4
9M6, 9M8
9N
9Q-9T
9U
9V
9X
9Y-9Z
A2
A3
A4
A5
A6
A7
A9
AA-AK
AP-AS
BS7
BT
BV
BV9P
BY
C2
C3
C5
C6
Sov. Mil. Order of Malta
Spratly Is.
Monaco
Agalega & St. Brandon Is.
Mauritius
Rodriguez I.
Equatorial Guinea
Annobon I.
Fiji Is.
Rotuma I.
Conway Reef
Swaziland
Tunisia
Vietnam
Guinea
Bouvet I.
Peter I I.
Azerbaijan
Georgia
Sri Lanka
United Nations HQ
ITU Headquarters
Timor-Leste
Israel
Libya
Cyprus
Tanzania
Nigeria
Madagascar
Mauritania
Niger
Togo
Western Samoa
Uganda
Kenya
Senegal
Jamaica
Yemen
Lesotho
Malawi
Algeria
Barbados
Maldive Is.
Guyana
Croatia
Ghana
Malta
Zambia
Kuwait
Sierra Leone
Spratly Is.
West Malaysia
East Malaysia
Nepal
Democratic Rep. of Congo
Burundi
Singapore
Rwanda
Trinidad & Tobago
Botswana
Tonga
Oman
Bhutan
United Arab Emirates
Qatar
Bahrain
USA
Pakistan
Scarborough Reef
China
Taiwan
Pratas I.
China
Nauru
Andorra
The Gambia
Bahamas
C8-C9
CA-CE
CEØX
CEØY
CEØZ
CE9
CM
CN
CO
CP
CT
CT3
CU
CV-CX
CYØ
CY9
D2, D3
D4
D6
DA-DL
DU-DZ
E2
E3
E4
EA-EH
EA6-EH6
EA8-EH8
EA9-EH9
EI-EJ
EK
EL
EM-EO
EP-EQ
ER
ES
ET
EU-EW
EX
EY
EZ
F
FG
FH
FJ
FK
FK/C
FM
FO
FO
FO
FO
FP
FR
FR/E
FR/G
FR/J
FR/T
FS
FT5W
FT5X
FT5Z
FW
FY
G
GC
GD
GH
GI
GJ
GM
GN
GP
GS
GT
GU
GW
GX
Mozambique
Chile
San Felix & San Ambrosio Is.
Easter I.
Juan Fernandez Is.
Antarctica
Cuba
Morocco
Cuba
Bolivia
Portugal
Madeira Is.
Azores
Uruguay
Sable I.
St. Paul I.
Angola
Cape Verde
Comoros
Germany
Philippines
Thailand
Eritrea
Palestine
Spain
Balearic Is.
Canary Is.
Ceuta & Melilla
Ireland
Armenia
Liberia
Ukraine
Iran
Moldova
Estonia
Ethiopia
Belarus
Kyrgzstan
Tajikistan
Turkmenistan
France
Guadeloupe
Mayotte
Saint Martin
New Caledonia
Chesterfield Is.
Martinique
Austral I.
Clipperton I.
French Polynesia
Marquesas I.
St. Pierre & Miquelon
Reunion I.
Europa Is.
Glorioso Is.
Juan de Nova Is.
Tromelin I.
Saint Martin
Crozet Is.
Kerguelen Is.
Amsterdam & St. Paul Is.
Wallis & Futuna Is.
French Guiana
England
Wales
Isle of Man
Jersey
Northern Ireland
Jersey
Scotland
Northern Ireland
Guernsey
Scotland
Isle of Man
Guernsey
Wales
England
H4
H4Ø
HA
HB
HBØ
HC-HD
HC8-HD8
HFØ
HG
HH
HI
HJ-HK
HKØ
HKØ
HL
HO-HP
HQ-HR
HS, E2
HV
HZ
I
ISØ, IMØ
J2
J3
J5
J6
J7
J8
JA-JS
JD1
JD1
JT-JV
JW
JX
JY
K
KC4
KC6
KG4
KHØ
KH1
KH2
KH3
KH4
KH5
KH5K
KH6-KH7
KH7K
KH8
KH9
KL7
KP1
KP2
KP3-KP4
KP5
LA-LN
LO-LW
LU
LU
LU
LU
LX
LY
LZ
M
MD
MI
MJ
MM
MU
MW
N
OA-OC
OD
OE
OF-OI
OHØ
Solomon Is.
Temotu Province
Hungary
Switzerland
Liechtenstein
Ecuador
Galapagos Is.
South Shetland Is.
Hungary
Haiti
Dominican Republic
Colombia
San Andres & Providencia
Malpelo I.
South Korea
Panama
Honduras
Thailand
Vatican
Saudi Arabia
Italy
Sardinia
Djibouti
Grenada
Guinea-Bissau
St. Lucia
Dominica
St. Vincent
Japan
Minami-Torishima
Ogasawara
Mongolia
Svalbard
Jan Mayen
Jordan
U.S.A.
Antarctica
Palau
Guantanamo Bay
Marianas Is.
Baker & Howland Is.
Guam
Johnston I.
Midway I.
Palymra & Jarvis Is.
Kingman Reef
Hawaii
Kure I.
American Samoa
Wake I.
Alaska
Navassa I.
Virgin Is.
Puerto Rico
Desecheo I.
Norway
Argentina
South Georgia I.
South Shetland Is.
South Orkney Is.
South Sandwich Is.
Luxembourg
Lithuania
Bulgaria
England
Isle of Man
Northern Ireland
Jersey
Scotland
Guernsey
Wales
USA
Peru
Lebanon
Austria
Finland
Aland Is.
OJØ
OK-OL
OM
ON-OT
OX
OY
OZ
P2
P4
P5
PA-PI
PJ2, PJ4
PJ5-PJ8
PJ9
PP-PY
PPØ-PYØF
PPØ, PYØS
PPØ, PYØT
PZ
RA-RZ
RA-RZ
R1FJ
R1MV
SØ
S2
S5
S7
S9
SA-SM
SN-SR
ST
SU
SV/A
SV-SZ
SV5
SV9
T2
T3Ø
T31
T32
T33
T5
T7
T8
T9
TA-TC
TD
TE
TF
TG
TI
TI9
TJ
TK
TL
TN
TR
TT
TU
TY
TZ
UA2
UJ-UM
UN-UQ
UR-UZ
V2
V3
V4
V5
V6
V7
V8
VE
VK
VKØ
VKØ
VK9C
Market Reef
Czech Republic
Slovak Republic
Belgium
Greenland
Faroe Is.
Denmark
Papua New Guinea
Aruba
North Korea
Netherlands
Bonaire, Curacao
St. Maarten, Saba, St. Eustatius
Netherlands Antilles
Brazil
Fernando de Noronha
St. Peter & St. Paul Rocks
Trindade I. & Martim Vaz Is.
Surinam
European Russia
Asiatic Russia
Franz Josef Land
Malyj Vysotskij I.
Western Sahara
Bangladesh
Slovenia
Seychelles
Sao Tome & Principe
Sweden
Poland
Sudan
Egypt
Mount Athos
Greece
Dodecanese
Crete
Tuvalu
West Kiribati Is.
Central Kiribati Is.
East Kiribati Is.
Banaba I.
Somalia
San Marino
Palau
Bosnia-Herzegovina
Turkey
Guatemala
Costa Rica
Iceland
Guatemala
Costa Rica
Cocos I.
Cameroon
Corsica
Central African Republic
Congo
Gabon
Chad
Ivory Coast
Benin
Mali
Kaliningrad
Uzbekistan
Kazakhstan
Ukraine
Antigua & Barbuda
Belize
St. Kitts & Nevis
Namibia
Micronesia
Marshall Is.
Brunei, Darussalam
Canada
Australia
Heard I.
Macquarie I.
Cocos (Keeling) Is.
VK9L
VK9M
VK9N
VK9W
VK9X
VO
VP2E
VP2M
VP2V
VP5
VP6
VP8
VP8
VP8
VP8
VP8
VP8
VP9
VQ9
VS6
VU
VU
VU
VY
W
XA-XI
XA4-XI4
XT
XU
XV
XW
XX9
XY-XZ
YA
YB-YH
YI
YJ
YK
YL
YN
YO-YR
YS
YT-YU
YU3
YV-YY
YVØ
YZ
Z2
Z3
ZA
ZB2
ZC4
ZD7
ZD8
ZD9
ZF
ZK1
ZK1
ZK2
ZK3
ZL-ZM
ZL7
ZL8
ZL9
ZP
ZR-ZU
ZS8
Lord Howe I.
Mellish Reef
Norfolk I.
Willis I.
Christmas I.
Canada
Anguilla
Montserrat
British Virgin Is.
Turks & Caicos Is.
Pitcairn I.
Antarctica
Falkland Is.
South Georgia I.
South Shetland Is.
South Orkney Is.
South Sandwich Is.
Bermuda
Chagos Is.
Hong Kong
Andaman & Nicobar Is.
Laccadive Is.
India
Canada
USA
Mexico
Revilla Gigedo
Burkina Faso
Cambodia
Vietnam
Laos
Macao
Myanmar
Afghanistan
Indonesia
Iraq
Vanuatu
Syria
Latvia
Nicaragua
Romania
El Salvador
Serbia & Montenegro
Slovenia
Venezuela
Aves I.
Serbia & Montenegro
Zimbabwe
Macedonia
Albania
Gibraltar
UK Sov. Base on Cyprus
St. Helena I.
Ascension I.
Tristan da Cunha & Gough Is.
Cayman Is.
South Cook Is.
North Cook Is.
Niue
Tokelau Is.
New Zealand
Chatham Is.
Kermadec Is.
Auckland & Campbell Is.
Paraguay
South Africa
Prince Edward & Marion Is.
BAND PLAN FREQUENCY ASSIGNMENTS
23-cm, 1240-1300 MHz ARRL Band Plan
ARRL 70-cm Wavelength Band Plan, 420-450 MHz
ARRL 33-cm Wavelength Band Plan, 902-928 MHz (cont.)
MHz
MHz
MHz
1240-1246
1246-1248
Use
ATV #1
Narrow-bandwidth FM point-to-point links and
digital, duplex with 1258-1260 MHz
1248-1252
Digital communications
1252-1258
ATV #2
1258-1260
Narrow-bandwidth FM point-to-point links and
digital, duplexed with 1246-1252 MHz
1260-1270
Satellite uplinks
1260-1270
Wide-bandwidth experimental, simplex ATV
1270-1276
Repeater inputs, FM and linear, paired with
1282-1288 MHz, 239 pairs every 25 kHz,
e.g., 1270.025, 1270.050, 1270.075, etc.,
1271.0-1238.0 MHz uncoordinated test pair
1276-1282
ATV #3
1282-1288
Repeater outputs, paired with 1270-1276 MHz
1288-1294
Wide-bandwidth experimental, simplex ATV
1294-1295
Narrow-bandwidth FM simplex services,
25 kHz channels
1294.5
National FM simplex calling frequency
1295-1297
Narrow bandwidth weak-signal communications (no FM)
1295.0-1295.8 SSTV, FAX, ACSB, experimental
1295.8-1296.0 Reserved for EME, CW expansion
1296.0-1296.05 EME exclusive
1296.07-1296.08 CW beacons
1296.1
CW, SSB calling frequency
1296.4-1296.6 Crossband linear translator input
1296.6-1296.8 Crossband linear translator output
1296.8-1297.0 Experimental beacons (exclusive)
1297-1300
Digital communications
Use
420.00-426.00 ATV repeater or simplex with 421.25 MHz video
carrier control links and experimental
426.00-432.00 ATV simplex with 427.250 MHz video carrier frequency
432.00-432.08 EME (Earth-Moon-Earth)
432.08-432.10 Weak-signal CW
432.100
70 cm CW/SSB calling frequency
432.10-433.00 Mixed-mode and weak-signal work
432.30-432.40 New beacon band
433.00-435.00 Auxiliary/repeater links
435.00-438.00 Satellite only uplink/downlink
438.00-444.00 ATV repeater input with 439.250 MHz video
carrier frequency and repeater links
442.00-445.00 Repeater inputs and outputs (local option)
445.00-447.00 Shared by auxiliary and control links, repeaters
and simplex (local option); 446.00 MHz national
simplex frequency
447.00-450.00 Repeater inputs and outputs
ARRL 33-cm Wavelength Band Plan, 902-928 MHz
MHz
Use
902-904
902.0-902.8
902.8-903.0
903.0-903.05
903.07-903.08
903.1
903.4-903.6
903.6-903.8
903.8-904.0
Narrow-bandwidth, weak-signal communications
SSTV, FAX, ACSB, experimental
Reserved for EME, CW expansion
EME exclusive
CW beacons
CW, SSB calling frequency
Crossband linear translator inputs
Crossband linear translator outputs
Experimental beacons exclusive
Use
904-906
906-907
906.50
907-910
Digital communications
Narrow bandwidth FM-simplex services, 25 kHz channels
National simplex frequency
FM repeater inputs paired with 919-922 MHz; 119 pairs
every 25 kHz; e.g., 907.025, 907.050, 907.075, etc.,
908-920 MHz uncoordinated pair
910-916
ATV
916-918
Digital communications
918-919
Narrow-bandwidth, FM control links and remote bases
919-922
FM repeater outputs, paired with 907-910 MHz
922-928
Wide-bandwidth experimental, simplex ATV, Spread Spectrum
ARRL 2 Meter Wavelength Band Plan, 144-148 MHz
MHz
Use
144.00-144.05
144.275-144.300
144.06-144.10
144.10-144.20
144.200
144.200-144.275
144.275-144.300
144.30-144.50
144.50-144.60
144.60-144.90
144.90-145.10
145.10-145.20
145.20-145.50
145.50-145.80
145.80-146.00
146.01-146.37
EME (CW)
Propagation beacons
General CW and weak signals
EME and weak-signal SSB
National SSB calling frequency
General SSB operation, upper sideband
Beacon band
OSCAR subband plus simplex
Linear translator outputs
FM repeater inputs
Weak signal and FM simplex
Linear translator outputs plus packet
FM repeater outputs
Miscellaneous and experimental modes
OSCAR subband – satellite use only!
Repeater inputs
146.40-146.58 Simplex
146.61-146.97 Repeater outputs
ARRL 2 Meter Wavelength Band Plan, 144-148 MHz (cont.)
MHz
Use
147.00-147.39 Repeater outputs
147.42-147.57 Simplex
147.60-147.99 Repeater inputs
ARRL 6 Meter Wavelength Band Plan, 50.0-54.0 MHz
MHz
Use
50.000-50.100 CW and beacons
50.060-50.080 U.S. beacons
50.100-50.600 SSB
50.125
SSB DX calling frequency
50.200
SSB domestic calling frequency (Note: Suggest
QSY up for local & down for long-distance QSOs)
50.400
AM calling frequency
50.600-51.000 Experimental and special modes
50.700
RTTY calling frequency
50.800-50.980 Radio Control (R/C) channels, 10 channels spaced
20 kHz apart (new)
51.000-51.100 Pacific DX window
51.000-52.000 Newly authorized FM repeater allocation
51.100-52.000 FM simplex
52.000-52.050 Pacific DX window
52.000-53.000 FM repeater and simplex
53.000-54.000 Present radio control (R/C) channels, 10 channels
spaced 100 kHz apart
SOUTHERN CALIFORNIA REGIONAL NOTE: Southern California, plus other major metropolitan cities throughout the country, may adopt local 2 Meter band plans slightly different than what appears here. See your local Icom dealer for more local details.© 2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. 6836
AMATEUR RADIO BAND PLAN
UHF/VHF
1240 46
1240
900
NOVICE VOICE AND DATA*
52
58 60
70
76
82
N O V I C E
88
94 95 97 1300 MHz
V O I C E
1296.1 SSB
1294.5 FM
band
902 904
06 07
910
916
918 919
922
928 MHz
band
902.1 SSB
AMATEUR TELEVISION FAST SCAN
SATELLITE (NO FM)
440
CW AND WEAK SIGNAL (NO FM)
DIGITAL
222
FM SIMPLEX
band
*420-430 MHz not available along Canadian corridor
*420
426
432 32.125 33 35 438
222
222.34
223
442
445 447
223.38
N O V I C E
V O I C E
A L L
224
450 MHz
432.1 SSB
446 FM
225 MHz
B A N D
222.1 SSB
223.5 FM
band
SSB
2
FM REPEATER
144
.1
.3
.5 .6 .9 145.1 .2
.5
.8 146 .4 .6 .61 147
.39 .42 .6
148 MHz
NO FM!
NO FM!
SSB
meters
144.2 SSB
146.52 FM
SATELLITE ONLY (NO FM)
6
DX WINDOW 50.100 - 50.125
50 .1
PACIFIC DX WINDOW 51.000 - 51.100
51 .1
52.05
53
54 MHz
50.125 SSB
52.525 FM
meters
NO CODE TECHNICIANS HAVE ALL PRIVILEGES ON THESE BANDS
HF Bands
NATIONAL CALLING FREQUENCY
CALLING FREQUENCY 28.4
10
NOVICE/TECHNICIAN W/CODE, CW*
12
NOVICE/TECHNICIAN PLUS, VOICE*
GENERAL VOICE, CW, SSTV, FAX
28 28.1
ADVANCED VOICE, CW, SSTV, FAX*
meters
17
29.3
30
24.930
24.990 MHz
GEN
ADV*
EXTRA
21.025
21.1
21.2 21.225
21.3
60
160
21.450 MHz
NOV/TECH+/CODE
GEN
ADV*
EXTRA
meters
18.068
18.1
18.11
18.168 MHz
GEN
ADV*
EXTRA
meters
14
14.025
14.150 14.175
14.225
SSTV 14.230
14.350 MHz
GEN
ADV*
EXTRA
meters
CW & FSK ONLY – MAXIMUM POWER 200 WATTS OUTPUT
10.1
10.150 MHz
GEN
ADV*
EXTRA
meters
7.025
DX WINDOWS
7.100
7.150
SSTV 7.171
7.225
7.300 MHz
NOV/TECH+/CODE
GEN
ADV*
EXTRA
CW ONLY
meters
60 METERS IS CHANNELIZED – MAXIMUM 50 WATTS ERP USB ONLY
meters
TUNING FREQUENCY
CHANNEL CENTER
3.5 3.525
75/80
SSTV 21.340
CW ONLY
7
40
29.7 MHz
NOV/TECH+/CODE
GEN
ADV*
EXTRA
RTTY CW
20
FM SIMPLEX 29.600
29.5 29.6
meters
NO PRIVILEGES
*Grandfathered
29.0
24.890
EXTRA VOICE, CW, SSTV, FAX
CW, FSK
SATELLITES DOWNLINK 29.300 - 29.510
28.5
CW & DATA
21
15
28.3
5.330.50 MHz
5.332.00 MHz
5.346.50 MHz
5.348.00 MHz
5.366.50 MHz
5.368.00 MHz
5.371.50 MHz
5.373.00 MHz
DX WINDOW 3.790 - 3.800 SSTV 3.845
3.675 3.700 3.725 3.750 3.775
3.850
CW ONLY
meters
1.8
DX WINDOW 1.830 - 1.850 (UNOFFICIAL)
5.403.50 MHz
5.405.00 MHz
GEN/ADV/EXTRA
4.0 MHz
NOV/TECH+/CODE
GEN
ADV*
EXTRA
2.0 MHz
GEN
ADV*
EXTRA
meters
All old & new license classes retain their
operating privileges after April 15, 2000.
Developed by Gordon West, WB6NOA,
RADIO SCHOOL, INC., for exclusive use by
Icom America Inc.
© 2004 Icom America Inc. The Icom logo is a registered trademark of Icom Inc. Visit us on the web at www.icomamerica.com.
120˚
51
50˚
57
71
60
59
58
82
61
50
68
79
78
91
80
89
88
90
99
02
01
00
09
12
11
10
19
U.S. Grid Square Map
110˚
22
21
20
32
31
30
42
41
40
90˚
100˚
52
62
51
61
50
72
71
82
81
92
91
02
01
12
11
22
21
32
31
42
41
62
52
70˚
80˚
61
51
72
82
71
81
80
92
91
90
02
01
00
12
11
10
21
20
29
50˚
41
31
30
39
40
49
70
60
50
59
69
58
68
79
78
89
88
77
70
60
29
19
48
80
50
90
40
00
30
67
09
39
10
20
08
38
49
99
87
57
59
89
28
66
76
Washington 18
69
79
28
18
79
69
97
47
89
59
99
49
76
66
38
08
09
39
19
29
55
07
37
48
98
86
56
58
88
17
27
65
75
68
78
27
17
78
68
96
46
88
58
75
98
48
65
37
07
08
38
54
18
28
06
36
47
97
85
55
57
87
26
16
North Dakota
64
74
67
77
95
45
26
16
77
67
Maine 64
87
57
74
97
47
36
06
07
37
Montana
17
27
35
05
46
96
84
54
25
63
15
56
86
66
76
94
25
15
44
76
66
73
63
86
56
96
46
Oregon
35
05
06
36
16
26
04
34
45
95
83
53
62
14
24
55
85
Minnesota
Vermont 43 New Hampshire
65
75
93
24
14
75
65
72
62
85
55
95
45
34
04
05
35
15
25
03
33
44
94
82
52
Idaho
61
13
23
Wisconsin
54
84
64
74
92
42 Massachusetts 61
23
13
74
64
71
84
54
33
03
94
44
02
32
04
34
14
24
New
York
43
93
40˚ 60
81
51
12
22
South Dakota
53
83
63
73
91
41 Rhode Island
22
12
70
73
63
60
83
53
32
02
Wyoming
93
43
01
31 Connecticut
03
33
13
23
Michigan
80
50
42
92
69
11
21
52
82
62
72
90
40
21
11
79
72
62
69
82
52
31
01 Pennsylvania
92
42
00
30
02
32
12
22
68
89
59
41
91
10
20
51
81
New
Jersey
Nebraska
Iowa
99
49
61
71
20
10
78
71
61
81
51
30
00
09
39
91
41
01
31
Ohio
11
21
88
58
40
90
19
29
Illinois
50
80
98
48
60
70
29
19
77
70
60
Delaware
80
50
Nevada
39
09 Maryland
08
38
90
40
00
30
10
20
57
87
49
99
18
28
59
89
47
97
Utah
76
69
79
28
18
District of Columbia37
79
69 Indiana
89
59
07
38
08
99
49
09
39
86
56
19
29
Colorado
48
98
27
17
58
88
96
46
68
78
27
17
West
Virginia
78
68
06
36
88
58
07
37
98
48
85
55
08
38
18
28
47
97
Virginia
16
26
57
87
California
95
45
Kansas
Missouri
26
16
67
77
77
67
05
35
36
06
87
57
84
54
97
47
Kentucky
07
37
17
27
46
96
15
25
56
86
94
44
25
15
66
76
76
66
04
34
35
05
86
56
83
96
46
06
36
16
26
45
95
Tennessee
14
24
North
Carolina
55
85
93
43
24
14
65
75
75
65
03
33
34
04
85
55
82
95
45
05
35
15
25
44
94
13
23
New Mexico
92
54
84
Arizona
42
Arkansas
23
13
Oklahoma
64
74
74
64
02
33
03
32
84
54
94
44
04
34
14
24
43
93 South Carolina
12
22
91
53
83
41
22
63
73
12
01
73
63
32
31
83
53
02
93
43
03
33
13
23
42
92
11
21
30˚ 90
Alabama
52
82
40
21
11
62
72
00
31
72
62
Georgia
30
82
52
01
92
42
41
02
32
10
12
22
20
91
51
Mississippi
49
81
20
10
Louisiana
61
71
71
30
39
61
00
81
51
41
91
120˚
40
31
21
01
29
11
90
50
29
80
Texas
19
60
70
70
39
60
09
80
50
40
90
49
30
20
00
28
10
99
59
89
18
69
79
79
38
69
08
89
59
99
49
48
39
29
09
19
98
58
88
17
68
78
Florida
78
07
68
88
58
98
48
47
28
38
08
97
18
57
87
67
77
77
0 100 200 300 400 500 600 700 800 Kilometers
06
67
87
97
57
47
07
96
17
27
37
56
86
66
76
0
100
200
300
400 Miles
76
05
66
86
95
56
96
46
06
26
36
16
110˚
85
75
Albers Equal Area Projection - Conterminous USA
65
55
80˚
45
56
67
81
70
69
92
77
98
60
70
CN
DN
FN
EN
40˚
CM
DM
EM
DL
FM
30˚
70˚
EL
100˚
ICOM America, Inc. • 2380 - 116th Ave. NE, Bellevue, WA 98004 • Customer Service: 425-454-7619
©2002, ICOM America, Inc. The ICOM logo is a registered trademark of ICOM, Inc.
AM-5024 10/02
90˚
www.icomamerica.com
U.S. Grid Square Map
Major VHF/UHF Contests
Mid January, Full Weekend
ARRL VHF Sweepstakes
Hawaii
**
160˚
Early March, Full Weekend
ARRL International DX Contest Phone
Mid May, Full Weekend
CQ National Fox Hunting Weekend
61
70˚
40
Early June, Full Weekend
ARRL VHF QSO Party
49
48
Mid June, Full Weekend,
SMIRK 6 meter QSO Party
AP
35
Mid July,
CQ World Wide VHF Contest
43
32
60˚
30
Mid September, Full Weekend
ARRL September VHF QSO Party
49
Courtesy: CQ Magazine & ARRL
48
AO
57
1. Say your grid square location when
operating on VHF & UHF bands.
56
04
76
65
34
13
44
23
02
54
64
33
12
43
22
01
53
63
32
11
42
21
00
52
31
10
41
20
51
30
40
75
62
74
73
72
85
84
83
96
95
94
93
29
39
49
59
18
07
06
05
04
03
28
17
16
15
14
27
26
25
24
38
37
58
48
47
57
46
56
66
35
45
55
65
75
12
22
32
42
52
01
11
21
31
41
51
18
17
16
15
14
13
29
28
27
26
25
24
23
39
38
37
36
35
34
33
BL10
BL20
BK19
BK29
BK18
BK28
40
50
49
59
48
47
46
BO
45
44
43
68
58
67
57
56
55
54
53
76
66
65
64
63
75
74
73
84
83
59
49
39
58
57
28
18
47
37
56
27
17
CO
16
06
46
36
55
26
45
35
54
25
15
05
95
85
30
38
96
86
40
48
07
97
87
77
60˚
50
29
19
08
98
88
78
41
31
20
10
09
99
89
79
69
51
21
11
00
90
80
70
60
BK08
19˚
52
42
32
22
12
01
91
81
71
61
13
02
92
82
72
62
AK98
BK
14
03
93
83
BK09
15
04
94
84
AK99
20˚
CP
16
05
95
85
73
63
02
30
BL00
21˚
17
06
96
86
74
64
54
44
53
19
77
36
43
20
67
76
33
10
BL21
18
07
97
87
BP
34
BL11
19
08
98
88
78
68
AK
70˚
10
09
99
89
79
69
23
08
97
86
19
13
09
98
87
09
00
99
88
77
66
55
24
03
3. Say your grid square letters phonetically.
Example: for grid 13 in region DM say “delta,
mike, one, three” on air.
©2002, ICOM America, Inc. The ICOM logo is a registered trademark of ICOM, Inc. AM-5024 10/02
67
90
89
78
14
2. Many portable GPS receivers can read out
Maidenhead* grid squares automatically.
*An instrument of the Maidenhead Locator System (named after the town outside
London where it was first conceived by a meeting of European VHF managers in
1980), a grid square measures 1° latitude by 2° longitude and measures approximately 70 x 100 miles in the continental US. A grid square is indicated by two letters
(the field) and two numbers (the square).. “
From ARRL source: http://www.arrl.org/locate/gridinfo.html
79
68
91
80
50
03
92
81
70
69
58
ICOM Grid Square Tips:
71
60
59
82
40
11
00
90
80
70
60
30
04
93
41
20
05
94
83
72
61
50
84
73
62
51
40
39
63
52
41
74
31
AL90
01
91
81
71
61
51
10
06
95
21
140˚
00
07
96
85
11
08
97
86
75
64
53
42
31
54
98
87
76
65
99
88
77
01
90
89
78
66
55
44
33
Early August, Full Weekend
ARRL UHF Contest
5. Have fun on VHF & UHF!
45
34
Mid July, Full Weekend
IARU HF World Championships
56
91
80
79
67
81
70
69
68
57
46
60
59
58
47
Mid/Late June, Full Weekend
ARRL Field Day
50
71
BL01
22˚
Pacific Ocean
BQ
160˚
BL22
BL
AL91
Early April, Spring Sprint–432 MHz
Early May, Spring Sprint–50 MHz
BL12
AL
Alaska
Early April, Spring Sprint–222 MHz
156˚
BL02
AL92
Early April, Spring Sprint–144 MHz
4. Give your general location along with your
grid square.
158˚
44
34
24
94
93
04
43
14
33
23
03
13
0
0
10
20
100
30
40
200
50
300
60
70
800 Kilometers
400 Miles
Albers Equal Area Projection - Alaska
140˚
160˚
61
50
ICOM America, Inc. • 2380 - 116th Ave. NE, Bellevue, WA 98004 • Customer Service: 425-454-7619
**All maps except Hawaii use an Albers Equal Area Projection. The map of Hawaii is based on the grid square map information from ARRL.
www.icomamerica.com
WHAT IS
SNAP
?
CONVENTIONAL TO TRUNKING,
IN A SNAP. REALLY.
Basic LTR® trunking is only a SNAP away! Our unique UT-111 snap
in module lets you upgrade an ICOM subscriber
ICOM’s subscriber units are built to meet strict
military (MIL SPEC) standards* 1 . All units
feature a die-cast aluminum chassis. A smart choice!
unit*2 to LTR trunking in seconds. Need conventional again? It’s still available, even with the
UT-111 module snapped in. Carriers and dealers alike will find their
business two-way has never been more flexible...or profitable!
TM
SNAP
FLASH
T R U N K I N G
Need more than basic LTR, either now or in the future? ICOM’s new
IC-F4TR*3 portable and upcoming mobiles*4 feature both basic LTR
and PassPort® software programmed into FLASH memory. Operate
basic LTR now, then upgrade to PassPort when you’re ready…or
just go straight to PassPort now! Both models are backwards compatible, so you can operate a mixed system of PassPort and
LTR. Future enhancements are possible with the FLASH memory.
FLASH MEANS FLEXIBLE UPGRADES
AND CUSTOMIZATIONS.
WHAT IS
*1 Meets MIL SPEC 810 C/D/E for shock/vibration
*2 Select models only. Contact your ICOM dealer or, contact ICOM directly for
more information: 425-454-8155.
FLASH
www.icomamerica.com
?
Call 425-450-6088 for free brochures
or 425-454-8155 to speak with
an ICOM representative
*3 This device has not been approved by the FCC. This device may not be sold or leased,
or offered for sale or lease, until approval of the FCC has been obtained.
*4 Estimated availability: December 2000. Availability subject to change without notice.
FOR PEOPLE WHO MAKE SMART CHOICES
©2000 ICOM America, Inc. All specifications subject to change without notice or obligation. The ICOM logo is a registered trademark of ICOM, Inc. All other trademarks are the the property of their respective owners. SNAPEMS400
CHAPTER 1
Introduction from Gordon West
Welcome to the world of long distance communications with marine
single sideband (SSB) radio. Hundreds of voice and data e-mail channels in the MF and HF frequency spectrum have been allocated to mariners for long-range, ship-to-ship, and ship-to-shore communications.
Marine single sideband, voice, "party line" communications can never
be replaced by ship satellite "private" communications! The
advantage of marine SSB is the ability to have a multiparty conversation for the exchange of information. Satellite communications is like
a telephone call - you can only talk to a specific person at a specific
time. You cannot talk to a group of individuals. An SSB gives mariners
the ability to share information with one another about weather, ports
of call, cruising conditions etc. Marine SSB is more like an internet
chat group than a phone call.
The marine single sideband service and frequencies have been around
for years. However, only recently have we seen the introduction of
low-cost, no-crystal, marine SSB equipment that can offer marine
radio, ham radio, and marine e-mail capabilities in one neat, 12-volt
DC package. ICOM, a leader in marine, commercial, and amateur
radio equipment, presents the overview of the marine single sideband
service, an easy-to-understand review of equipment, and suggested
installation of the radio and antenna and ground systems.
If you are like most mariners, you are probably not all that interested in
what makes SSB radio work on the inside. However, one thing is for
sure, when you pick up the mic or prepare to send a computer e-mail
message, you want the very best signal on the band, and you want to
connect with the station you are calling, on the first try!
In this book we'll show you how, in a non-technical, easy-to-understand language. We will also give you some proven installation techniques that will help you to install the equipment on your boat if you
are handy with tools. But, keep in mind that your marine electronics
page 1
dealer is an expert in this field. They have the experience to complete a
proper installation of your equipment. If you don't feel you have the
necessary skills, your dealer is the best person you can find to insure
proper installation and top performance from your marine SSB radio.
This handbook is also a ready reference for the hundreds of voice and
data (e-mail) channels available in the maritime service, as well as
channels and frequencies for ship-to-ship and ship-to-shore in both the
marine service and the amateur radio service. We'll even show you
how to tune in weather facsimile and NAVTEX.
TIP!
All frequencies listed have been updated in early 1997,
with no anticipated changes for the next few years.
Ready to communicate throughout the world on your marine SSB
transceiver? Do you want to pick up that microphone and immediately
make a quick phone call home? Want to send a FAX or e-mail? Ready to
receive weather information over your lap-top computer? If so, then read
on—ICOM presents the very best in marine single sideband and we will
give you a fun and easy-to-understand look at long-range radio.
page 2
CHAPTER 2
Start with a Good VHF Set
Before you begin thinking about marine SSB long distance communications, let's first review the hard working marine VHF radio system.
ICOM's lC-M59 VHF set is shown with optional flush mount kit.
Radio rules require that you must have a marine VHF radio in your
vessel before you can install a marine SSB transceiver.
The international marine VHF service is designed for coastal cruising.
We use marine VHF when we are within 20 miles of a shore station
or another VHF equipped vessel. This is the effective range of the
VHF receiver.
The VHF system is worldwide. Whether you cruise to
Hawaii, Bermuda, or the Mediterranean, the VHF/FM channels are the
same as they are here. Just use the international (INT) button on your
radio. The frequencies assigned to channels may be different in the
US, Canada or the rest of the world.
page 3
Your typical ship-to-shore VHF range to the Coast Guard should be
about 20 miles. You can normally hear weather broadcast stations
WX-1, WX-2, and others, up to 80 miles away. The marine WX
channels are available only in the US and Canada. The range to a
marine telephone operator should be at least 20 miles. Ship-to-ship
range is better than 10 miles.
If you are not achieving this minimum range, check out your VHF
antenna system and all connections. For sailboats, the best type of
antenna is one that is mounted on the mast with good quality cable
down to your set. Keep a portable antenna as a spare in case of
dismasting. Sailboat masthead antennas will generally pull in stations
and transmit further than any other type of antenna system. These
antenna are only 3’ tall and have “3dB” gain. They use the height of
the mast head to achieve maximum range.
For powerboats, you should use a minimum of an 8-foot “6dB”
antenna. If you have a large more stable vessel, you might want to
select a 21-foot, 9dB gain antenna that performs well in all but heavy
seas. A good powerboat antenna installation will normally let you reach
out to the distances described above.
A good quality, high-tech, VHF transceiver is also important to obtain
maximum range. ICOM produces both handheld and permanently
installed marine VHF transceivers. These installed radios (with options)
meet minimum digital selective calling (DSC) requirements. DSC is a
new system for making distress calls. This system will be implemented
worldwide over the next several years. Deep Draft (over 300 tons)
vessels put into service since 1992 comply with this system now. All
such vessels must comply by early 1999. Ultimately recreational vessels will need DSC VHF radios to communicate with DSC equipped
ships. It is expected that all new marine VHF radios approved for sale
in the US will be DSC equipped by 2001-2002. An ICOM DSC VHF
set connected to your onboard GPS gives you added automatic safety
communications in case of an emergency. The DSC radio will transmit
an emergency call that includes your vessel’s position taken from the
GPS. See the wide variety of ICOM VHF sets at your favorite marine
electronics dealer.
page 4
You must have a VHF set on board and a current FCC ship station
license before a single sideband radio may be installed. If you have a
licensed VHF system aboard, and you need more than 20+ miles of
range when out at sea, then single sideband communications is your
next step.
CHAPTER 3
The Marine Single Sideband (SSB) Service
Don't let the words "single sideband" scare you. It's simply a type of
radio transmission. The military has been using single sideband for
years to transmit messages throughout the world. Ham radio operators,
who are permitted to select almost any type of worldwide transmission
mode, have been using single sideband for years on worldwide
frequencies, to talk to their buddies anywhere and everywhere.
In 1971, the Federal Communications Commission (FCC) phased in
SSB transmissions for the long distance marine radio service. At the
same time, it introduced the expanded marine VHF service for local
communications. It also phased out the older double sideband sets.
A single sideband signal concentrates your voice onto a tightly
compacted radio wave capable of traveling from hundreds to thousands
of miles. This very efficient, compacted radio signal is a faithful
reproduction of your actual voice. Unlike a commercial AM broadcast
station, that sends out duplicate double voice wave forms plus an
energy robbing "carrier," marine single sideband eliminates the
unneeded mirrorlike lower sideband, the power robbing "carrier" that
does nothing more than hush background noise when nothing is on the
air. Marine SSB puts all of the radio energy from your voice into a
compacted upper sideband wave form that gives you worldwide
talk power.
If you don't speak into the mic, your transmitter doesn't put out any
energy. Only when you speak will radio energy jump out into the air
page 5
You must have a VHF set on board and a current FCC ship station
license before a single sideband radio may be installed. If you have a
licensed VHF system aboard, and you need more than 20+ miles of
range when out at sea, then single sideband communications is your
next step.
CHAPTER 3
The Marine Single Sideband (SSB) Service
Don't let the words "single sideband" scare you. It's simply a type of
radio transmission. The military has been using single sideband for
years to transmit messages throughout the world. Ham radio operators,
who are permitted to select almost any type of worldwide transmission
mode, have been using single sideband for years on worldwide
frequencies, to talk to their buddies anywhere and everywhere.
In 1971, the Federal Communications Commission (FCC) phased in
SSB transmissions for the long distance marine radio service. At the
same time, it introduced the expanded marine VHF service for local
communications. It also phased out the older double sideband sets.
A single sideband signal concentrates your voice onto a tightly
compacted radio wave capable of traveling from hundreds to thousands
of miles. This very efficient, compacted radio signal is a faithful
reproduction of your actual voice. Unlike a commercial AM broadcast
station, that sends out duplicate double voice wave forms plus an
energy robbing "carrier," marine single sideband eliminates the
unneeded mirrorlike lower sideband, the power robbing "carrier" that
does nothing more than hush background noise when nothing is on the
air. Marine SSB puts all of the radio energy from your voice into a
compacted upper sideband wave form that gives you worldwide
talk power.
If you don't speak into the mic, your transmitter doesn't put out any
energy. Only when you speak will radio energy jump out into the air
page 5
waves. In between each word, your transmitter and battery system
relax! This means that you can talk further with less current demands
from your battery system.
Your compressed, upper sideband signal, is captured by a distant
receiver, and that receiver converts your radio signal into crystal clear
reception.
When the FCC phased out double sideband equipment and introduced
SSB, it doubled the number of available channels for marine
communications. More new SSB channels were also added in 1991!
By compressing the transmitted signal into a very narrow band width,
distant receivers are able to reject almost half the normal noise and
interference level from the air waves. FCC-required frequency
tolerances keep SSB sets precisely on frequency to minimize that sound
distortion on receive. By simply adjusting a single ''clarifier'' knob on
your SSB receiver, you can produce the normal sounding voice that
was transmitted by a distant ship or shore station.
Coast Guard
Since safety at sea communications deserve the highest priority, let's
first examine the United States Coast Guard and its role in the high
frequency marine single sideband service. Our Coast Guard and other
distress agencies throughout the world, guard 2182 kHz as the International Distress frequency. This allows you to contact shore-side and
marine rescue agencies immediately when outside of VHF
Channel 16 range. Since 2182 kHz is an international distress
frequency, you will find that there are literally thousands of stations
guarding this channel for a distress call, 24 hours a day.
In 1999, 2182 was replaced by 2187.5 as the International Distress
frequency. This new frequency asisignment is part of the new GMDSS
service required on vessels over 310 tons. Use of 2182 will be phased
out and replaced by digital (DSC) watch on 2187.5.
page 6
The United States Coast Guard also offers additional working
channels on its Automated Mutual-Assistance Vessel Reserve
frequencies in each of the popular single sideband bands. Imagine
using your marine SSB set to place a call for help when you're
thousands of miles away from any shore station. Through the Coast
Guard AMVER system, they can readily pinpoint the position of
commercial and military vessels passing through your area and signal
them to immediately alter course and steam to your location to render
assistance. Believe it or not, you just thought you were all alone out on
the ocean. There are actually many commercial and military
vessels that could reach you within a matter of hours accounted for and
pinpointed via SSB AMVER system radio communications. The
AMVER system uses a full range of SSB frequencies to provide worldwide safety to ocean-going vessels. See appendix for frequencies.
Phone Home?
Want to place a telephone call? Shore-side commercial telephone
stations are standing by on hundreds of frequencies to place your phone
call. These shore-based phone companies operate extensive transmitting and receiving antenna systems to bring in your signals loud and
clear. Remember, their revenue depends on your satisfaction. You can
be assured that they have the most going for them when it comes to
powerful transmitters, sensitive receivers, and huge antenna arrays that
beam in on your single sideband signal. These same telephone
stations also transmit "traffic lists" for ships at sea who have telephone
calls waiting from shore-side parties. They also broadcast weather
reports, storm warnings, and other notices to mariners where safety at
sea is important. If an emergency should arise the phone companies
with their massive antenna systems can also patch you into rescue
coordination centers, hospitals, and emergency-at sea medical systems
without charge. See appendix for frequencies.
E-Mail
Your new marine SSB can also send and receive electronic mail over
public common carrier, narrow band direct printing channels. It is just
like sending e-mail from your home or office through a specific
using your secret password over phone lines. SSB e-mail relies on the
USCG INFO 800-368-5647
page 7
airwaves and ionosphere in place of phone lines. Your e-mail provider
can be reached from anywhere in the world with up to 12 network
stations standing by for your computer traffic. An e-mail connection
will provide a significant $$$ savings over conventional, highfrequency, SSB voice or satellite-phone communications from your
vessel to your business or home; or to anyone who has an e-mail or
FAX capability on shore. Shore stations can automatically reach your
computer, by dialing a single phone number to get to your e-mail
network provider. If you have a lap-top computer onboard, your present
or new ICOM SSB may need only a small modem and software to
complete the e-mail connection.
More about SSB e-mail in Chapter 3, with a complete listing of
narrow-band direct printing frequencies listed in the appendix, plus a
map showing a radio e-mail electronic worldwide network of stations
also found in the appendix.
It is a plug-in affair to hook your marine SSB into e-mail via the airwaves.
Ship-To-Ship
There are many ship-to-ship frequencies allocated for communicating
over long distances to other vessels with marine SSB gear. Without
incurring any "land line" charges, you can communicate from one ship
to another ship in opposite parts of the world, free of charge, with
crystal clear reception. Thanks to Mother Nature, which we'll talk about
page 8
in a few moments, your signals can travel thousands of miles to other
vessels with SSB equipment with almost no loss of voice quality. See
appendix for frequencies.
Ship-To-Shore For Free
Private shore stations share ship-to-ship channels. This allows you to
communicate directly with a marine supply company that can help you
replace the part that fell off your anchor windless 3,000 miles away.
There is no land line charge in this communication service because
you are transmitting directly to a distant marine parts or marine
electronics store. These "private coast stations" can also include
private marine business, yacht club and marine salvage companies,
private air ambulance companies, and any other type of marine
business that need to regularly communicate over hundreds or even
thousands of miles to distant ship stations. You may even be able to set
up a marine SSB base station at your office to stay in touch regarding
marine matters when you're far out at sea. Your sideband may also be
operated in the SITOR mode, allowing for digital-transmission and
reception of documents, such as yacht race standings, business
transactions, and detailed manifests. See appendix for voice and
SITOR frequencies.
Shortwave
Your marine SSB radio from ICOM can also be used to receive (and in
certain cases, transmit) other services that share frequencies adjacent
to the marine band.
You can tune into worldwide international broadcast stations and find
out the latest news, here and abroad. You can eavesdrop on military and
State Department communications that fill the high frequency
spectrum. See appendix for frequencies.
Weather Facsimile Charts Free
You can tie your weather facsimile receiver into your marine sideband
set and receive crystal clear weather charts in your particular area of
cruising. See appendix for frequencies.
page 9
Ham Radio
You can also tune into amateur radio frequencies, and listen for local
weather reports on the maritime mobile amateur radio nets.
Licensed amateur operators may use ICOM SSB transceivers that are
capable of transmitting on amateur frequencies. The "No Code Technician" license allows you worldwide ham privileges when
cruising within Mexico with a valid Mexican reciprocal operating
permit. And even if you don't obtain the ham license to talk, all ICOM
marine SSB transceivers easily tune into ham calls so you can listen to
the valuable maritime mobile weather nets, both upper and
lower sideband.
Military
Use your marine SSB set as an ultra-sensitive shortwave receiver You
can tune into foreign embassies, the Air Force and the Navy, "secret"
shortwave stations, and any other type of communications that can be
found on the worldwide high frequency spectrum.
Time Signals
Oh yes, one last thing—if you forgot to set your watch, you can tune
into the international time signals wherever you cruise. Tick, tick tick,
at the sound of the tone, it is exactly. . . See appendix for frequencies.
Worldwide Reception for Free
If time ticks don't interest you, consider the following that can be
received on your new marine single sideband, all-band transceiver:
U.S. Air Force in-flight communications
Strategic Air Command
Air Force 1 (the President's plane)
Civil Air Patrol
United States Intelligence Agencies
Antarctic Stations
Interpol
U.S. Weather ships
Hurricane Research Center
Volmet-Aviation Weather Broadcasts
page 10
Morse Code News and Weather for Free
It's also possible to tune in radio facsimile broadcasts and CW Morse
code broadcasts from national news agencies, i.e. United Press
International and Associated Press. These broadcasts take place on
international frequencies that can be picked up just about anywhere in
the world. There are Morse code readers and teleprinter displays that
are easily hooked up to your ICOM transceiver and will instantly read
out what is being sent! It's almost as good as your morning newspaper.
While your ICOM marine SSB may be capable of transmitting on any
or all of these frequencies, you should not! Transmitting outside of
your authorized maritime and ham limits is illegal. If you hold a valid
amateur radio license, you will be permitted to transmit on ham bands—
but transmitting outside of the marine and ham bands would be illegal
except in an emergency to signal for help.
So get that modem and lap-top computer hooked up your ICOM marine SSB by the plug-in jacks on the back.
• Send and receive e-mail.
• Tune into weather facsimile broadcasts, and watch the weather
charts unfold on your computer screen. Decode the dots and
dashes of Morse code computer programs.
• Tune into Navtex broadcasts from the Coast Guard, and check
out the latest weather report or navigational warning.
• Your computer and your SSB make a perfect marriage to
add information and safety to your cruising.
page 11
CHAPTER 4
High Frequency Bouncing Radio Waves
Marine single sideband transceivers broadcast in the "high
frequency" range of the radio spectrum. Unlike VHF (very high frequency) communications that always travel line-of-sight, transmissions
in the "high frequency" region take advantage of Mother Nature for
some extra long distance communications.
As of July 1, 1991, the following frequency bands have been allocated
for marine single sideband service:
2 MHz
4 MHz
6 MHz
8 MHz
12 MHz
16 MHz
18 MHz
22 MHz
25 MHz
27 MHz
FIGURE A
When transmitting on any band, one component of your radio signal
hugs the surface of the ocean. This is called the ground wave. Ground
waves that hug the surface of the earth and ocean travel approximately
50 to 200 miles from your transmitter. If you are communicating on
single sideband with a nearby shore station or another boat less than
100 miles away, chances are it's the ground wave component of your
signal that's doing all the work. Your ground wave signal is always
there, day or night, and does not depend on anything other than a good,
strong transmitted signal.
page 12
Good ground wave coverage out to 150 miles depends on a good
antenna and a good radio frequency ground system aboard your boat.
The better your antenna and grounding, the further you can communicate via ground waves. More on this later!
It's the "sky wave" component of your transmitted radio signal that
gives you long distance, single side band range. Sky waves are the
components of your transmitted radio signal that travel up into the air
and bounce off of the ionosphere and are reflected back to earth
hundreds and even thousands of miles away.
The ionosphere surrounds our globe and is present 24 hours a day. Its
density and reflecting capabilities change with day and night, the
season of the year, and the 11-year solar cycle. Hanging like an
invisible radio mirror between two stations, the ionosphere is
responsible for reflecting back to earth marine SSB waves that strike it
at the right angle.
“The right angle" to establish communications with a station, let's say
3,000 miles away, depends on the time of day you are broadcasting and
the particular band of frequencies you are using. Lower frequencies
tend to bounce back to earth close in. Frequencies around 12 MHz tend
to bounce back to earth over fairly long distances, typically 3,000 miles.
22 MHz may give us the longest bounce, enabling you to communicate
from the West Coast of the United States into the Mediterranean. If the
ionosphere is very strong, you may get a second bounce off your sky
wave signal, which enables you to talk twice the distance that you
normally would. On 22 MHz, this means that you can easily talk all the
way around the world on a double-hop or triple-hop transmission.
The ionosphere is constantly changing, and a frequency that you
communicated on yesterday might not be suitable for communications
today. Often the time of day and season of the year will make a
difference. When band conditions change in the ionosphere, you
simply change frequencies on your ICOM to maintain a good, clear
signal. With multiple frequencies and multiple bands available,
you can stay in touch as the ionosphere goes through its regular
ups and downs.
page 13
FIGURE B
At night, the ionosphere gradually lowers. Your signals won't be able
to bounce as far, however, you will still enjoy several thousand miles of
communications range.
During daylight hours, the ionosphere rises, giving you longer range
on higher frequencies. Since it's the sun's rays that charge up the
ionospheric layers, solar and other disturbances will sometimes
enhance— and sometimes occlude—single sideband marine
communications.
Sky waves are unaffected by local weather conditions. Whether it's
sunny or cloudy, snow or rain, windy or still, your sky wave range will
not be influenced by local weather conditions.
Did You Know?
The only time you will hear "weather noise" on your
transceiver is in the proximity of lightning and thunderstorms. Lightning may be picked up as far away as 200
miles on lower frequencies. It sounds like a static crash at
the exact same time that you see the bolt illuminate. Some
mariners leave their SSB radio turned on while cruising at
night in inclement weather to get prepared for storm cells.
When they hear it on the radio they should be prepared to
see it soon!
page 14
After a few weeks of playing around with your new single sideband
radio telephone, you will begin to get a feel for the expected range on
any one particular band of frequencies. In our next chapter, we'll give
you some secrets!
CHAPTER 5
Single Sideband Range
Your transmitted ground waves are seldom influenced by atmospheric
or ionospheric conditions. Here is what to expect in ground wave range,
24 hours a day:
SSB Ground Wave Range
2 MHz
-
150 miles
4 MHz
-
100 miles
6 MHz
-
75 miles
Anytime,
8 MHz
-
70 miles
day or night
12 MHz
-
50 miles
16 MHz
-
50 miles
VHF Band (156 MHz)
-
8 miles vessel-to-vessel
25 miles to Coast Guard
page 15
After a few weeks of playing around with your new single sideband
radio telephone, you will begin to get a feel for the expected range on
any one particular band of frequencies. In our next chapter, we'll give
you some secrets!
CHAPTER 5
Single Sideband Range
Your transmitted ground waves are seldom influenced by atmospheric
or ionospheric conditions. Here is what to expect in ground wave range,
24 hours a day:
SSB Ground Wave Range
2 MHz
-
150 miles
4 MHz
-
100 miles
6 MHz
-
75 miles
Anytime,
8 MHz
-
70 miles
day or night
12 MHz
-
50 miles
16 MHz
-
50 miles
VHF Band (156 MHz)
-
8 miles vessel-to-vessel
25 miles to Coast Guard
page 15
Sky waves give you the very longest range, thanks to the ionosphere.
Here's what to expect in solid communication range to distant ship and
shore stations:
SSB SKY WAVE RANGE
FREQUENCY
BAND
2 MH z
DAYTIME
RANGE
Sky waves absorbed
N I G H T TI M E
RANGE
1,000 miles
4 MHz
Sky waves absorbed
1,500 miles
6 MHz
500 miles
2,000 miles
8 MHz
700 miles
3,000 miles
12 MHz
1,500 miles
16 MHz
3,000 miles
22 MHz
Worldwide
25 MHz
Worldwide
Worldwide in the
direction of the sun.
Worldwide in the
direction of the sun
until 8 p.m. local
time.
Little sky wave
reflection after sunset.
Little sky wave
reflection after sunset.
As you can see, to talk further, go to a higher frequency. However,
watch out—you can sometimes select a frequency that is too high. This
may cause your sky wave signal to actually bounce over the
station that you wish to communicate with, or go off into space.
If your signal is literally skipping over the desired station, switch to a
lower frequency.
After a few weeks of tuning your receiver to different stations, you will
be able to anticipate which band will be the best for a particular time of
day to talk to a specific station hundreds or thousands of miles away.
Try tuning your set during the day, and then at night, and listen to the
page 16
difference in range. Switch between bands and begin to get a feel for
how the ionosphere causes signals to skip long distances, and sometimes short distances.
Marine telephone shore stations make it easy to predict the best band
to establish rock-solid communications. Every four hours they read a
traffic list (calls being held for vessels at sea) as well as ocean weather
conditions. They simultaneously transmit this information on each one
of the authorized bands. Simply switch bands while they are transmitting and determine which band offers the best reception. Where you
hear them loudest is where they will hear you best. After they finish
with their traffic list, give them a short call and you have now
established communications, thanks to sky waves and Mother Nature's
reflective ionospheric mirror.
CHAPTER 6
Band and Channel Selection
It's easy to program additional frequencies and channels with today's
modern, high-frequency, marine single-sideband transceivers. You don't
need to purchase expensive plug-in crystal elements. Everything is synthesized, and your modern ICOM marine SSB receives from .5 MHz
through 29.999 MHz, and transmits from 1.6 MHz to 27.500 MHz.
The marine single-sideband service uses specific channels to identify
specific frequencies between 4 MHz and 27.5 MHz This book has a
listing of channels and frequency assignments in the appendix. On the
2 MHz band, we use actual frequencies not International Telecommunications Union (ITU) channel designators. We use ITU channel
designators on frequencies between 4 MHz and 27.5 MHz.
Most mariners will use about 10 frequencies in each marine band. New
ICOM marine SSB transceivers offer over 300 channels that are
synthesized, for voice, and an additional 600 channels for electronic
page 17
difference in range. Switch between bands and begin to get a feel for
how the ionosphere causes signals to skip long distances, and sometimes short distances.
Marine telephone shore stations make it easy to predict the best band
to establish rock-solid communications. Every four hours they read a
traffic list (calls being held for vessels at sea) as well as ocean weather
conditions. They simultaneously transmit this information on each one
of the authorized bands. Simply switch bands while they are transmitting and determine which band offers the best reception. Where you
hear them loudest is where they will hear you best. After they finish
with their traffic list, give them a short call and you have now
established communications, thanks to sky waves and Mother Nature's
reflective ionospheric mirror.
CHAPTER 6
Band and Channel Selection
It's easy to program additional frequencies and channels with today's
modern, high-frequency, marine single-sideband transceivers. You don't
need to purchase expensive plug-in crystal elements. Everything is synthesized, and your modern ICOM marine SSB receives from .5 MHz
through 29.999 MHz, and transmits from 1.6 MHz to 27.500 MHz.
The marine single-sideband service uses specific channels to identify
specific frequencies between 4 MHz and 27.5 MHz This book has a
listing of channels and frequency assignments in the appendix. On the
2 MHz band, we use actual frequencies not International Telecommunications Union (ITU) channel designators. We use ITU channel
designators on frequencies between 4 MHz and 27.5 MHz.
Most mariners will use about 10 frequencies in each marine band. New
ICOM marine SSB transceivers offer over 300 channels that are
synthesized, for voice, and an additional 600 channels for electronic
page 17
e-mail. ICOM marine transceivers also offer over 100 channels that are
user-programmable, perfect for ham frequencies, shortwave broadcasting stations, weather facsimile frequencies, and just about any other
frequency that you might want to tune in and listen.
You can add, change, or delete frequencies yourself by entering the
proper numbers on the keypad. Most ICOM marine electronic dealers
can custom program local frequencies to save you the time of entering
them into memory using the key pad.
Did You Know?
Your ICOM marine SSB can also work in any mode, including lower sideband or ham channels on 40 meters and
80 meters, without the need to buy an expensive lower sideband filter.
Plan your communications range by selecting the appropriate bands. If
you're not going to be communicating halfway around the world, then
don't program many channels above 16 MHz. If you are only going to
Mexico, or to the Caribbean, load up on 4 MHz, 8 MHz, and 12 MHz
frequencies and channels. More than likely, these frequencies and channels are already loaded into your equipment.
page 18
CHAPTER 7
Equipment Selection and Location
Locate your marine SSB in a place that is convenient for operation.
The radios are large and heavy. They should be positioned for easy
access to all controls. Most of the time your SSB set can nestle right
along with your other nav gear.
You can build the equipment into your instrument panel, however, you
should provide some ventilation. Many new SSB’s are fan coded and
there needs to be a source of fresh air to facilitate this process. Everything on the inside of the radio is transistorized, and slight amounts of
heat are actually good for the equipment—it dries things out.
TIP!
We recommend keeping the equipment down low for easy
channel selection. Make it comfortable to operate. Some
night in a cozy harbor you may wish to simple flip through
the worldwide frequencies to pick up some action. You
want the set as accessible to your hand as possible without
any undue effort.
ICOM SSBs have a built-in speaker that faces forward. This
eliminates having to purchase an external speaker which is required
when the built-in speaker is located elsewhere. A good carpenter can
build a teak frame that will make the equipment look nice. An
anodized aluminum trim kit is also available from your ICOM dealer.
A heavy-duty mounting bracket is shipped with each rig to facilitate
mounting it from below or hanging from above.
Once you have selected an ideal location for mounting the equipment,
read on, because we'll take a look at power requirements, antennas,
and grounding.
page 19
◆ Installation Recommendations
Automatic Antenna Tuner Mounting Locations
(1) Aboard sailboats, the automatic antenna tuner normally
feeds an insulated section of rigging, such as a backstay or,
on a ketch, a mizzen sidestay. The automatic tuner hides
away, below, near the chain plate that holds this particular
insulated stay. The automatic tuner should go as far
away from the radio as possible in order to minimize RF
feedback.
TIP!
FCC rules require the active antenna tuner to be located as
far away from people as possible. In other words, don't
mount the tuner in an area where someone could actually
touch the high voltage output single wire terminal!
(2) The automatic tuner requires no specific orientation. You
can hang it vertically or horizontally. You should insure that
it will stay relatively dry and the water drain screws (if any)
are at the low point of the unit if it is going to get wet.
(3) Remove the downward-facing drain screw to provide an escape path for trapped moisture.
page 20
(4) Aboard powerboats, the automatic antenna tuner normally
feeds a fiberglass whip. If possible, mount the tuner up in
the flying bridge area, well protected from the weather.
Mount it as far away from the helm as possible. If there is
no flying bridge on the powerboat, the tuner may be mounted
near the base of the white fiberglass whip.
(5) The wire feeding your antenna system is high-voltage
"GTO-15." It is available at most marine electronic stores.
Although it looks like coaxial cable, it is not. The jacket
contains no internal braid. This means the high-voltage
single wire is part of your active antenna system, and should
be routed far away from other wires aboard. Keep it away
from sleeping quarters or areas where crew members might
sit. It's always a good idea to keep everyone at least 5 feet
away from the GTO-15, antenna lead wire.
Did You Know?
It is normal to hear your automatic tuner make a clicking
sound during tune-up. What you are hearing are the internal relays self-adjusting inductance and capacitance for the
best possible match. The clicking will normally stop after
about 5 seconds of initial tune-up. The tuner will remain
silent during normal communications on marine SSB. The
clicking sounds during normal tune-up are a positive indication that your system is performing as it should. However, if the clicking continues for more than 10 seconds,
chances are the tuner is missing its ground connection or
the antenna connection up on deck.
page 21
CHAPTER 8
Grounding (Counterpoise)
Good grounding or counterpoise techniques are absolutely necessary
for maximum single sideband range. Half your antenna is your radio
frequency ground, so don't skimp here! The radiating portion of your
antenna needs to see a mirror image of itself before it will send out
your SSB signal. This mirror image, called a counterpoise, is created
by using metal surface and seawater as your radio frequency
ground plane.
Your marine single sideband system will not perform satisfactorily if
you don't have a good counterpoise system. Poor counterpoise (ground)
equals poor range. This is especially true on lower frequencies where
large RF grounds (counterpoise) are required for good range.
If you make direct contact with the seawater, you may be able to
reduce the amount of ground foil that must be run from your radio and
the automatic tuner. If your through-hulls are metal and are all bonded
with a green wire per ABYC (American Boat & Yacht Council)
standards, find a couple of in-water bronze through-hulls, and run the
foil directly to them for an effective seawater ground. But make sure
that bronze through-hull is already part of your bonding system with a
telltale green wire attached to it and going off to other underwater
metals. Never ground to a bronze through-hull that has been specifically left isolated and ungrounded.
Use a wire brush to clean up the neck of the through-hull, and then use
a hose clamp to affix the copper foil to that through-hull. Bunch the
foil up a few times to provide a good solid connection where it won't
easily rip.
page 22
TIP!
If there are several bonded underwater through-hulls near
your automatic antenna tuner, your grounding will be easier.
You might only need 50 feet of ground foil to complete the
entire process! Direct contact with seawater improves any
RF ground system.
Same thing for a powerboat—but you'll need more ground foil because
your automatic antenna tuner is probably mounted up top on the flying
bridge. In this case, you will need to follow a wire run channel from the
top of the flying bridge down below decks, and down to the bilge area
where you can make connection to underwater through-hulls. You could
even use a metal tube that may already be in place as part of your
ground foil run.
Why foil? Round wires
create inductive reactance
at radio frequencies, and are
not effective as a good
grounding conveyance. Use
2 or 3 inch wide, 3 mil
copper foil (available at
most marine electronic
stores) to achieve a good
seawater ground.
Use 3-inch wide, 3-mil copper foil to
ensure a good sea water ground.
Your counterpoise system
needs to begin directly
below your antenna feedpoint if at all possible. When
you use an antenna coupler,
we will consider this as the
"feedpoint."
page 23
An ideal counterpoise for all frequency single side band work should
consist of up to 100 square feet of metal surface area directly below the
feedpoint. While this may sound like an impossible number of square
feet to achieve, consider the following large surface RF ground planes
(counterpoise) already available to you:
Tanks
Propeller and shaft
Encapsulated lead keel
Bonded through-hulls
Stainless steel tuna towers/stanchions
Chain plates
Engine block
You can develop your own large surface area RF ground plane (counterpoise) system by fiberglassing into your hull copper screen or 2-3
inch wide copper foil strips. It's too bad they didn't build in the ground
plane when they laid up the hull, isn't it?
It will probably take you about a day and a half and a hundred feet of
copper foil to create a good capacity ground plane below the water
line. You will be running copper foil inside your hull for a capacitive
ground to the seawater. No, the foil does not go on the outside of the
hull! The fact that the ground foil is close to the seawater makes all the
difference on transmit and receive range. While it might be an effort to
get all this foil below the water line, it will really make the difference
when you press down on your microphone key.
Did You Know?
Your bonding of underwater metals that are already tied in
with a common ground wire will not affect your corrosion
control system. If your present underwater metals are not
all bonded together, you may wish to lay out a RF ground
system (counterpoise) independent of an actual connection to the seawater but that's not really necessary.
These other copper foil leads go directly to the antenna tuner. The tuner
will have a ground terminal to which the foil is attached. Do not reduce
page 24
the size of the foil as you approach the tuner or the radio. Also, do not
convert the foil to wire as you approach the tuner or the radio. Fold the
foil back on itself and drill a hole for the mounting stud.
Your RF ground system (counterpoise) does not actually need to
contact the seawater to be effective. Even though an encapsulate lead
keel doesn't actually touch the seawater, it makes a capacitive ground
by being next to the seawater, if you run wide copper foil to it.
You may either double bolt the foil to an exposed keel bolt, or actually
tap directly into the lead keel with a bolt going through the copper foil
and into the lead.
In attaching to through-hulls, remember, it will improve performance
if you run foil between each through-hull. Stainless steel hose clamps
are the best way to "pick up" these underwater metals. Water tanks,
copper hydraulic lines, etc.; can also be connected with foil using
hose clamps.
I know, I know, trying to get a good RF ground (counterpoise) system
is a bit difficult—especially if you can't get at your keel bolt. If this is
the case, then drill into the keel and pull up some lead. Any sailboat
system that doesn't use a poured keel is losing a tremendous amount of
potential in obtaining a super signal. Only if your keel is made of lead
shot poured in fiberglass would you not elect to use it. In any other
case, where there is a large amount of surface area below the water
line, such as a lead keel, by all means use it in your RF ground plane
counterpoise. It will save you many hours of trying to run more copper
foil and screen below decks.
Good RF grounding (counterpoise) techniques will also enhance your
overall protection from a lightning strike. Lightning protection and good
RF grounding all have a common denominator—a large amount of
surface area below the water line.
Again, I would like to mention that running wire—even battery cable—
is not effective as an RF ground (counterpoise) at radio frequencies.
Although, wire looks like a good DC ground, it looks invisible at most
page 25
radio frequencies. Use foil, and only foil. Even aluminum foil will work
in a pinch. You can even use aluminum air conditioning foil with
sticky on the back as counterpoise. Wires won't work so forget about
using them.
The more counterpoise, the better your signal. Ever wonder why
supertankers always have the loudest signals on the band? They are
only using 100-watt equipment, and a standard 23-foot antenna, but
their signal literally bounces off of their gigantic counterpoise.
TIP!
Again, RF grounding IS the key to single sideband super
range. It's one of the few components of the installation
you can control.
Once the copper is in place, you can just about forget it. It will do the
work for you. We recommend applying a thin coat of paint or resin
over the copper to keep the salt water from tarnishing it. While green
copper works just as well as bright, shiny copper, it's a much more
sanitary installation to keep it isolated from the elements. It also prevents tearing or other damage to the system.
If you have soldered all copper joints, you won't need to check for
continuity. However, you may wish to clean up copper connections at
through-hull fittings every couple of years. Since these connections are
made with hose clamps, there is the possibility that the contacts may
get corroded after a few years in the bilge. A steel brush should bring
both the copper and the through-hull fitting up to a nice shiny surface,
and you can make your connection again.
The periodic inspection of your copper ground system, you can be
assured that your signal will stay loud and clear.
page 26
◆ Ground System Review
(1) The automatic tuner must be connected to a good electrical
ground. A good ground prevents shocks, interference and
numerous other problems. One example of a good ground
is the nearest metal member on a metal vessel. For best
results, use metal strap or foil. Make the length as short as
possible.
(2) Good ground systems on wood or fiberglass boats are more
difficult to install. For best results, use strap or foil connected to the keel, tanks, or other large metal objects.
If you have no way of contacting the seawater, you could install a
counterpoise for each band of frequencies used above 4 MHz, as shown
in the figure. This would be a last resort!
Ground plates? We save the underwater ground plate as an absolute
last resort for a single-sideband antenna system that is working off of
an automatic antenna tuner. Ground plates provide terrific contact to
the seawater, and also have good connection points to attach the foil.
The porous ground plates don't achieve any better ground than if you
were to come up with your own copper plate, but they do provide a
superior means for mounting them through the hull. Using a ground
plate as a RF ground may cause interference with other on board electronics using the same ground plate as a DC ground.
page 27
The automatic antenna tuner performs best with a direct seawater ground
connection. Whether it be through your bonded underwater
through-hulls, or to a dedicated ground plate, the direct connection is
one great way to minimize hours spent in the bilge developing a
good-ground system.
TIP!
A capacitive ground system, made up of copper strips run
around the hull below the water line, or individual copper
strips at one-quarter wavelength sections, is one way to
achieve a good ground, but may take several days to lay
into the hull and keep dry. Why not go for the direct seawater contact, and establish your single-sideband ground
connection in hours instead of days!
◆ Typical Installation
The following figure shows a typical installation. Any radio communications system operating with a whip antenna or long wire antenna
(insulated back stay) must have an adequate ground connection,
otherwise the overall efficiency of the radio installation is degraded
especially at low frequencies.
The 50 ohm output impedance of the transceiver makes it necessary to
employ antennas of the trapped or externally matched type. The use of
an antenna coupler in conjunction with a whip antenna or long wire
antenna (insulated back stay) allows an efficient installation which will
cover all HF marine bands.
Of course, those of you with aluminum hull vessels, your
RF groundplane (counterpoise) is your hull, and you'll probably
have the loudest signal anywhere in the world. No further RF
grounding is necessary.
page 28
CHAPTER 9
Antennas
To achieve the ultimate in long skywave range, you need an antenna
system that is a minimum of 23 feet long tied into your automatic
antenna tuner. The longer the antenna, the better!
For powerboats, your antenna will be a 2 or 3-piece, fiberglass whip.
The fiberglass whip, on a powerboat, is mounted on the port or
starboard side with an upper support bracket. It is fed with single
wire GTO-15 that connects the whip to the nearby automatic antenna
tuner. This whip is sufficient for most powerboats.
For sailboats, insulating one of the stays "in the clear" is the best way
to achieve an antenna system that is between 30 feet and 70 feet long.
An insulated backstay is the most popular choice. The insulators
are put on by professional riggers. The rigger should place the top
insulator at a point where it is about 3 feet from the mast. The bottom
page 29
insulator, on a single
backstay, is placed at eye
level. Any lower and someone might actually touch
the hot part of the antenna.
Any higher and it's tough
to service the connection
point. Keep it at eye level.
On a split backstay, where
the split is below the masthead, use three (3) insulators.
The top and bottom inUse a stainless steel hose clamp or brass kearny
sulators
are installed on the
nut to make your connection.
side of the backstay to be
used as the antenna. The other insulator should be placed near the top
of the split leg as close to the Y as possible. This effectively takes the
split out of the antenna system. Run the GTO-15 up the stay to a point
above the lower insulator.
Use a stainless steel hose clamp to make your connection. You can also
make the connection with a brass kearny nut available at electrical
houses. Make sure that there is a good contact between the GTO-15
single wire and the insulated stay. NEVER USE COAX! Use rigger's
tape to completely seal the connection, and at least once a year check
your connection to insure it is making a good electrical contact with
the stay.
On a ketch, you can insulate either the port or the starboard main stays,
or you could insulate a mizzen stay and achieve good
results. I like the mizzen stay better than the port or starboard stay,
because it is more likely to be outside of and away from other riggins.
Anytime you provide an antenna that is part of your rigging that is
surrounded by other rigging, you lose valuable transmission and reception range. On sailboats, with all sorts of grounded rigging, your
antenna must be outside of this rigging, and in the clear, to transmit
and receive over long range.
page 30
If your insulated stay may come in contact with other metals, or could
be touched by someone on deck, use rigger's tape or plastic stay covers
to keep it isolated. Always keep in mind that everyone on deck needs to
stay away from your transmitting antenna when you are actually on the
air with the microphone keyed. On receive, the antennas are
harmless. But on transmit, new FCC rules require everyone stay clear
of the radiating antenna.
Remember, where ever you install GTO-15 (a "hot" part of your
antenna system) along a metal component of the vessel, you should cut
any green bonding wire that connects that component to ground. If
the backstay chain plate is bonded, cut the bonding wire to that chain
plate. If you have installed GTO-15 next to a stanchion, that stanchion
should be removed from the bonding system. This prevents that
powerful SSB signal from
going right back to ground
rather than radiating from
your antenna
Pre-Tuned 6-Foot Whip
Whip antenna mounted over a stailess steel rail
A pre-tuned 6-foot whip
containing both ham and
marine radio frequencies
will work nicely on both
powerboats and sailboats.
The whip does not require
an automatic antenna tuner,
so what you pay for the
whip will actually be less
than what you would have
paid for an automatic antenna tuner. Your range
with the whip is about 30%
less than you would get
with an automatic tuner
connected to a long
antenna wire.
page 31
The Whip Must Be Mounted Over A Horizontal Stainless Steel Rail!
The whip cannot be mounted on wood, nor can it be mounted on fiberglass. These pre-tuned whips MUST be over a horizontal rail with at
least 3 feet of surface area on each side of the whip.
For sailboats, the whip goes where you normally put the hibachi or
outboard motor. Keep it away from the self-steering metal wind vane or
wind generator.
On powerboats, the pre-tuned whip is placed over any horizontal rail,
with the rail around the flying bridge most preferred. This gets the
energy up and away from everyone down below. Remember, everyone
must be at least 5 feet away from any transmitting high frequency
antenna system.
The whip features plug-in "taps" to cause the antenna to self-resonate
on specific marine radio or ham radio frequencies. Each tap point is
marked in MHz for marine band, and meters for the ham band. You
simply plug in the banana plug to the appropriate jack, and you are on
the air with your self-tuned antenna system.
The self-resonant whip antenna gives good results up to a 3,000 miles
range. But each time you switch from one marine MHz band to an
other one, you must send someone out to the whip to tap into the
appropriate band that you plan to operate on.
page 32
CHAPTER 10
Adding 12 Volts
Your transceiver will be shipped with a red and black power cord. This
is your 12-volt connection, and it is fused.
A 150-watt marine single sideband transceiver can draw over 30 amps
on voice peaks. It's only when you talk that current is consumed in
these proportions so don't worry, it's not 30 amps continuous out of
your battery when the mic button is pressed down!
It's recommended to hook up your 12-volt connections directly to your
ship's battery system. This allows you to stay on the air in case of a
malfunction of your electrical panel. This is when you may need your
set the most.
If you have some hefty 12-volt wires leading from your battery compartment to your fuse panel, a second choice would be to go ahead and
make your connection at the instrument panel. Clip off large amounts
of extra power cable, but always leave enough coiled up behind the
radio so you can pull it from its mount with enough cable to work on
the set turned on.
Route your power cable along the same track as your RF ground foil.
Watch out for those sharp edges so that they don't nick the cable. Don't
even think about using the RF ground foil as the black side of the power
cable—these are two separate "ground" systems. One is for 12 volts
DC and the other is for radio frequencies!
Use wire lugs to attach the cable to the terminal strip. The radio power
lead is already fused, you do not necessarily need to go through an
external circuit breaker; you can if you want, but that adds one more
"weak link" in your power cable assembly.
page 33
TIP!
If you run the power cable to your battery system, choose
a battery that is less apt to fail in an emergency. It you have
a separate battery that is located above the water line,
choose it in case of flooding. Just as soon as seawater
covers your batteries, you are off the air—just when you
wish you were on.
If you need to extend the wires supplied by the factory, see the wire
table below. Make certain that any splices are well soldered and are
protected from the salt environment. Soldering with radio solder is the
preferred method. Measure the distance from the battery to the radio
and back to the battery.
CONDUCTOR SIZED (AWG) FOR 3% VOLTAGE DROP AT 12 VOLTS
Current (AMPS)
LENGTH
5
10
15
20
25
30
40
50
60
70
80
90
100
10'
18
14
12
12
10
10
8
8
6
6
6
4
4
15'
16
12
10
10
8
8
6
6
4
4
4
2
2
20'
14
12
10
8
8
6
6
4
4
4
2
2
2
25'
14
10
8
8
6
6
4
4
2
2
2
1
1
30'
12
10
8
6
6
4
4
2
2
2
1
1/0
1/0
40'
12
8
6
6
4
4
2
2
1
1/0
1/0
1/0
1/0
50'
10
8
6
4
4
2
2
1
1/0
1/0
2/0
3/0
3/0
60'
10
6
6
4
2
2
1
1/0
2/0
2/0
3/0
3/0
4/0
70'
10
6
4
2
2
2
1/0
2/0
2/0
3/0
3/0
4/0
4/0
80'
8
6
4
2
2
1
1/0
2/0
3/0
3/0
4/0
90'
8
4
4
2
1
1/0
2/0
3/0
3/0
4/0
Use 3% voltage drop for any "critical application" affecting the safety of
the vessel or its passengers: bilge pumps, navigation lights, electronics, etc.
page 34
CHAPTER 11
Eliminating Noise Interference
Now that you have your SSB station completely installed, it's time to
turn it on and start listening to the bands. Your antenna tuner system is
automatically set close enough on receive that you should hear plenty
of signals. Notice that there is more atmospheric noise on the lower
frequencies than the higher frequencies. With your engines and other
motors turned off, the noise is the usual type of background racket
prevalent on every band until a signal appears.
TIP!
Strong signals will usually completely mask out noise.
Weak signals on 2 and 4 MHz will only quiet the noise by
about 50 percent. The more sensitive your receiver, the
more atmospheric noise you are going to pick up—this is
normal. Poor receivers don't pick up backgr ound noise!
Atmospheric noise is always there—on any frequency, but louder on
lower frequencies. It can not be filtered out—to do so would also cause
your distant radio signals to fade away.
The noise that can be filtered is electrical noise generated by the
ignition system of your engine, plus noise from other motors onboard.
Fluorescent lights also create noise that is usually heard on the lower
frequencies. Other noise sources: fans, refrigeration, battery voltage
monitors, inverters, computers and battery chargers.
Onboard noise sources should be filtered at the spot they are generated. There are filters for alternators, and filters for fluorescent lights.
You can put resistor spark plugs on your gas engine, and electronic
tachometer filters on your electronic tachs. Fuel pumps can be quieted
down, and bait tanks silenced, with specific filters designed for each
individual interference source.
page 35
TIP!
Tune in a relatively weak signal on your SSB set, and then
start the engine. If the signal is still there, your interference noise problems are few. However, if the signal completely disappears—you will need to get some filters for
each noise interference source.
For noises and interference external to your boat, such as a passing
skiff with an outboard that can be heard clearly on your SSB set,
simply turn on your noise-blanker switch on the front of your radio.
This will cancel out the repetitious popping sound almost completely.
It may also help on your fluorescent lights. Although the noise-blanker
built into your set is one way of dampening repetition-type noise, noise
filters at the source of the noise are the best way to go. Like plugging
leaks, you must methodically get every single one.
page 36
CHAPTER 12
Your FCC License
Did You Know?
Marine SSB operation still requires a Federal Communications Commission marine station license, as well as a
restricted operators permit. Even though the Federal
Communications Commission has stopped licensing
certain VHF radio systems, your longer range marine single
side band still needs the proper call letters.
FCC Form 506 must be completed, following all instructions carefully.
If you already have a valid VHF license, you will still use Form 506,
but indicate that you are requesting a modification.
Form 506 is rather complex, but give it your best try by indicating "fee
type code" as "PASR", and a licensing fee for 10 years at $75. Be sure
to answer "Yes" on requesting a new or modified maritime mobile
service identity number. This will give you capabilities for digital
selective calling.
Check the category of transmitters for VHF, all EPIRB types, SSB for
both bands, radar at 9300-9500 MHz, RTTY, and satellite. If you
already have a selective call number be sure to list it. Same for your
INMARSAT number—if you have one, list it!
Read the fine print on the form, and then send it on to the Federal
Communications Commission. It may take several tries to get the
license to go through; but when it does, you will be all set for your new
marine SSB system.
Complete FCC Form 753 for your personal operators permit. This is
called the restricted operators permit, and it's necessary for all SSB
installations. If you will be carrying passengers for hire, you also need
page 37
a marine radio operators permit. This requires a simple multiple-choice
test to make sure you know how to run and operate a marine radio
telephone. For information about the marine radio operators permit,
and a simple book that prepares you for the test, call 1-(800) 669-9594
and ask for the Gordon West Commercial General Radiotelephone book.
The Federal Communications Commission may also have these forms
on the lnternet (http://www.fcc.gov), and you may be able to go online and apply for all of this right at the computer.
page 38
CHAPTER 13
Going on the Air
Your new marine SSB transceiver has been pre-programmed by the
manufacturer, a dealer, or distributor that sold the equipment. It is easy
to reprogram different frequencies into your new equipment. Refer to
your owner's manual for programming instructions. It's just as easy as
pushing buttons on your telephone. Go on, give it a try!
The Federal Communications Commission requires that your marine
station license is valid and covers the frequencies 2,000 kHz to 27,000
kHz or 2 MHz to 27 MHz before transmitting. Make sure you have this
license posted before going on the air.
If you followed the installation instructions precisely for both your
radio equipment and the automatic antenna tuner, your radio should
perform up to specifications. If you have any questions, you might want
a technician to check it out. The instruction manual with your new
ICOM SSB lists several ways to verify full power output.
TIP!
Before transmitting on any frequency, listen! In fact, spend
a complete week listening to different frequencies and
different bands to get a feel for how marine SSB communications take place.
When listening to ship-to-ship and ship-to-private shore station calls,
you will generally hear both sides of the conversation. This will give
you an idea of how ship-to-ship communications take place. Always
remember to give your official FCC call sign at the beginning of your
transmission, at least once every 10 minutes, and when you sign off.
When tuning into the ship-to-shore marine telephone station, you will
only hear the shore station side of the conversation. The marine
telephone frequencies are duplex. Ship stations transmit on different
page 39
frequencies than the shore stations. Your ICOM SSB automatically
knows where to transmit when tuned to the shore station telephone
companies. The very professional marine telephone operators and their
service technicians will expertly ask you the questions about where
you are, who you are, and what number you want. Simply follow their
instructions and you will have no problems communicating through
the telephone service.
The same thing holds true with the United States Coast Guard AMVER
stations. You will only hear the shore side of the conversation. The
United States Coast Guard personnel expertly extract all of the information they need for any emergency. Once again, do a lot of listening
before making any calls.
Probably your first call will be for a radio check. Don't use the United
States Coast Guard or 2182 kHz for radio checks as they have far more
important matters than giving out signal reports all day long.
When you are ready for a radio check, try the distant high seas marine
operator. Wait until they are finished with their local weather reports
before giving them a call. Always choose the band that sounds the
strongest to you.
Follow the procedures for initiating a call in the upcoming chapters of
this handbook. The marine telephone companies, it they're not real busy,
are more than happy to accommodate a radio check.
You can also receive radio checks from other pleasure boats that you
might hear on ship-to-ship frequencies. Most commercial vessels will
probably ignore any calls for radio check, so try to select one that sounds
like a fellow pleasure boat mariner, and exchange signal
reports. You should generally receive reciprocal reports. If a station
sounds very weak to you, they will probably say that you are weak to
them. Same thing with the telephone service; if they're not coming in
strong, you won't either.
Weak signals are not necessarily a result of something wrong with your
installation. Sometimes ionospheric band conditions simply won't
page 40
favor any particular single sideband band. Try the next band up to
improve signal reports. Try a different time of day, and expect that
some days you'll have better signal levels than others.
Did You Know?
Since your radio waves are solely dependent on ionospheric
conditions, it's quite normal for signal levels to change.
You may also notice that signals will fade in and out on the
higher frequencies, such as 12, to 27 MHz. Again, this is
completely normal and should result in almost no loss of
intelligibility during a call.
Another fun way to check the operation of your equipment is to
receive as many foreign broadcast stations as possible. Refer to the
back of this book for a listing of international shortwave transmitting
stations. These stations should normally come in loud and clear, but
are still subject to 20 second fades. If you are hearing plenty of activity
on these frequencies, plus strong signals from other boats and shore
stations, chances are your installation is working fine, and you will
enjoy worldwide communications with single sideband equipment.
If you decide to have a licensed technician check out your equipment,
most marine electronic dealerships will be more than happy to send a
tech with the proper field strength equipment to "sign off" your station.
Since you completely installed the equipment yourself, there will be
little that the technician will need to do other than to check out your
antenna tuner setup, double check all connections to insure that they
are weatherproof, and to make some field strength measurements and
exchange signal reports with distant stations. Since electronic
technicians are quite familiar with the characteristics of single
sideband frequencies, they can quite accurately assure you that your
set is on the air and operating perfectly. If there is any way that they
can squeeze a few more watts out of your system, they will also do
that. Have them sign your log book with their license number to
further verify that your system is 100 percent "go."
page 41
CHAPTER 14
Operating Procedures - Distress, Urgency
and Safety
If you have an emergency, plan to use your VHF set as well as your
marine single sideband to call out for help. If you are within 100 miles
of the shore, first try your VHF on the international distress channel,
Channel 16. If you are far out to sea and do not receive immediate
response on VHF Channel 16, your next step is to switch to long-range
single sideband.
First try 2187.5 kHz, the international distress call for marine single
sideband. If after three attempts you do not receive an immediate reply
to your distress call, then switch to any frequency where you hear strong
signals. The marine operator is always a good one. Use any frequency
on your marine sideband that will get a response from another station.
Here are the procedures for placing or acknowledging a distress call on
your marine single side band, as well as for your VHF marine
transceiver. These are the approved procedures as outlined by the
Radio Technical Commission for Maritime Services in cooperation with
the Federal Communications Commission.
◆ Spoken Emergency Signals
There are three spoken emergency signals:
(1) Distress Signal: MAYDAY
Distress signal MAYDAY is used to indicate that a mobile
station is threatened by grave and immediate danger and
requests immediate assistance. MAYDAY has priority over
all other communications.
(2) Urgency Signal: PAN-PAN (Properly pronounced
PAHN-PAHN)
Used when the safety of the vessel or person is in jeopardy.
page 42
"Man overboard" messages are sent with the Urgency
signal. PAN-PAN has priority over all other communications with the exception of distress traffic.
(3) Safety Signal: SECURITY (Pronounced SAY-CURITAY)
Used for messages concerning the safety of navigation or
giving important meteorological warnings.
Any message headed by one of the emergency signals (MAYDAY,
PAN-PAN, or SECURITY), must be given precedence over routine
communications. This means listen. Don't transmit. Be prepared to help
if you can. The decision of which of these emergency signals to use is
the responsibility of the person in charge of the vessel.
◆ Radiotelephone Alarm Signal [notes indicate this rule changes in
1999 -- 2187.5]
This signal consists of two audio frequency tones transmitted
alternately. This signal is similar in sound to a two-tone siren used by
some ambulances. When generated by automatic means, it shall be sent
as continuously as practicable over a period of not less than 30 seconds
nor more than one minute. The purpose of the signal is to attract the
attention of the person on watch or to actuate automatic alarm devices.
The radiotelephone alarm signal shall be used only with the distress
signal except in the situation discussed in the section
dealing with the Urgency Call and Message Procedures.
◆ Distress Call and Message
SENDING: Distress Call and Message
First send the Radiotelephone Alarm Signal, if available.
(1) Distress signal MAYDAY (spoken three times)
(2) The words THIS IS (spoken once)
(3) Name of vessel in distress (spoken three times) and call
sign (spoken once)
page 43
The Distress Message immediately follows the Distress Call and
consists of:
(4) Distress signal MAYDAY (spoken once)
(5) Name of vessel (spoken once)
(6) Position of vessel in distress by latitude and longitude or
bearing (true or magnetic, state which) and distance to a
well-known landmark such as a navigational aid or small
island, or in any terms which will assist a responding
station in locating the vessel in distress. Include any
information on vessel movement such as course, speed,
and destination.
(7) Nature of distress (sinking, fire, etc.)
(8) Kind of assistance desired
(9) Any other information which might facilitate rescue,
such as: length or tonnage of vessel, number of persons
on board, and number needing medical attention, color
of hull, decks, cabin, masts, etc. (10) The word OVER
EXAMPLE: Distress Call and Message
(Send Radiotelephone Alarm Signal, if available, for at least 30
seconds but not more than one minute)
"MAYDAY-MAYDAY-MAYDAY
THIS IS-BLUE DUCK-BLUE DUCK-BLUE DUCK-WA 1234
MAYDAY-BLUE DUCK
DUNGENESS LIGHT BEARS 185 DEGREES
MAGNETIC-DISTANCE 2 MILES
STRUCK SUBMERGED OBJECT
NEED PUMPS-MEDICAL ASSISTANCE AND TOW
THREE ADULTS-TWO CHILDREN ABOARD
ONE PERSON COMPOUND FRACTURE OF ARM
ESTIMATE CAN REMAIN AFLOAT TWO HOURS
BLUE DUCK IS THIRTY-TWO FOOT CABIN CRUISER
BLUE HULL-WHITE DECK HOUSE
OVER"
page 44
NOTE: Repeat at intervals until answer is received. If no answer is
received on the Distress frequency, repeat using any other available
channel on which attention might be attracted.
◆ Acknowledgment of Distress Message
If you hear a Distress Message from a vessel and it is not answered,
then YOU must answer. If you are reasonably sure that the distressed
vessel is not in your vicinity, you should wait a short time for others to
acknowledge. In any event, you must log all pertinent details of the
Distress Call and Message.
SENDING: Acknowledgment of Receipt of Distress Message
Acknowledgment of receipt of a Distress Message usually includes the
following:
(1) Name of vessel sending the Distress Message
(spoken three times)
(2) The words THIS IS (spoken once)
(3) Name of your vessel (spoken three times)
(4) The words RECEIVED MAYDAY (spoken once)
(5) The word OVER (spoken once)
EXAMPLE: Acknowledgment Message
"BLUE DUCK-BLUE DUCK-BLUE DUCK-WA 1234
THIS IS-WHITE WHALE-WHITE WHALE-WHITE
WHALE-WZ4321
RECEIVED MAYDAY
OVER"
◆ Offer of Assistance
After you acknowledge receipt of the distress message, allow a short
interval of time for other stations to acknowledge receipt, if any are in
a position to assist. When you are sure of not interfering with other
page 45
distress-related communications, contact the vessel in distress and
advise them what assistance you can render. Make every effort to
notify the Coast Guard. The offer-of-assistance message shall be sent
only with the permission of the person in charge of your vessel.
SENDING: Offer-of-Assistance Message
The Offer-of-Assistance Message usually includes the following:
(1) Name of the distressed vessel (spoken once)
(2) The words THIS IS (spoken once)
(3) Name of the calling vessel (spoken once)
(4) The word OVER (spoken once)
(5) (On hearing an acknowledgment, ending with the word
OVER from the distressed vessel, continue with your
offer of assistance message.)
(6) Name of calling vessel and radio call sign (spoken once)
(7) The word OVER (spoken once)
EXAMPLE: Offer-of-Assistance
To be sent after a short interval of time, but long enough to be sure that
further transmissions will not cause harmful interference and long
enough to work out relative position and time to reach the distressed
vessel:
"BLUE DUCK-THIS IS-WHITE WHALE-OVER
(on hearing the word OVER from BLUE DUCK, continue)
I AM PROCEEDING TOWARD YOU PROM TEN MILES
WESTWARD EXPECT TO ARRIVE IN ONE HOUR
COAST GUARD HAS BEEN NOTIFIED INCLUDING
YOUR NEED FOR DOCTOR
I HAVE ONE INCH PORTABLE PUMP
PLEASE ADVISE IF MY ASSISTANCE IS NOT NEEDED
WHITE WHALE-WZ4321-OVER"
page 46
◆ Urgency Call and Message Procedures
The Urgency Call begins with the emergency signal, consisting of three
repetitions of the group of words PAN-PAN (pronounced
PAHN-PAHN). The Urgency Call and Message is transmitted on
VHF Channel 16 (or 2182 kHz, in the same way as the Distress Call
and Distress Message. The Urgency signal PAN-PAN indicates that
the calling person has a message concerning the safety of the vessel, or
a person in jeopardy. The Urgency signal is authorized for situations
like the following:
- Transmission of an urgent storm warning by an
authorized shore station.
- Loss of person overboard but only when the assistance
of other vessels is required.
- No steering or power in shipping lane.
SENDING: Urgency Call and Message
The Urgency Call and Message usually include the following:
(1) The Urgency signal PAN-PAN PAN-PAN PAN-PAN
(2) Addressee-ALL STATIONS (or a particular station)
(3) The words THIS IS (spoken once)
(4) Name of calling vessel (spoken three times) and
call sign (spoken once)
(5) The Urgency Message (state the urgent problem)
(6) Position of vessel and any other information that will
assist responding vessels. Include description of your
vessel, etc.
(7) The words THIS IS (spoken once)
(8) Name of calling vessel and radio call sign (spoken once)
(9) The word OVER
EXAMPLE: Urgency Call and Message
(Not involving possible use of radiotelephone alarm)
page 47
"PAN-PAN PAN-PAN PAN-PAN-ALL-STATIONS
(or a particular station)
THIS IS-BLUE DUCK-BLUE DUCK-BLUE DUCK
HAVE LOST MY RUDDER
AM DRIFTING TOWARD SHORE AND REQUIRE TOW
SEVEN PERSONS ON BOARD
BLUE DUCK IS THIRTY-TWO FOOT CABIN
CRUISER - BLUE HULL
WHITE DECK HOUSE
THIS IS-BLUE DUCK-WA 1234
OVER"
◆ Safety Call and Message Procedures
The Safety Call, headed with the word SECURITY (SAY-CURITAY,
spoken three times), is transmitted on the Distress and Calling frequency
(VHF Channel 16 or 2182 kHz), together with a request to shift to a
working frequency where the Safety Message will be given. The Safety
Message may be given on any available working frequency.
United States Coast Guard stations routinely use the Safety Call
SECURITY to alert boating operators that they are preparing to
broadcast a message concerning safety of navigation. The call also
precedes an important meteorological warning. The Safety Message
itself is usually broadcast on Coast Guard Channel 22A (157.1 MHz)
and 2670 kHz. Although recreational boating operators may use the
Safety Signal and Message, in many cases they would get better results
and perhaps suffer less criticism by giving the information to the Coast
Guard without making a formal Safety Call. The Coast Guard usually
has better broadcast coverage from its shore stations and will
rebroadcast the information if it is appropriate.
SENDING: The Safety Call and Message
The Safety Call usually includes the following: (On VHF Channel 16
or 2182 kHz.)
page 48
(1)
(2)
(3)
(4)
(5)
The Safety Signal SECURITY (spoken three times)
Addressee-ALL STATIONS (or a particular station)
The words THIS IS (spoken once)
Name of vessel calling and radio call sign
Announcement of the working channel (frequency)
where the Safety Message will be given
(6) Radio Call Sign
(7) The word OUT
The Safety Message usually includes the following: (Select working
channel (frequency) announced in step 5 above)
(1)
(2)
(3)
(4)
(5)
(6)
The Safety Signal SECURITY (spoken three times)
The words ALL STATIONS (spoken once)
The words THIS IS (spoken once)
Give the Safety Message
Repeat the Radio Call Sign
The word OUT
EXAMPLES: Safety Call and Message
(On VHF Channel 16)
"SECURITY-SECURITY-SECURITY-ALL STATIONS
THIS IS-BLUE DUCK-WA 1234
LISTEN CHANNEL 68
WA 1234-OUT"
(On VHF Channel 68)
"SECURITY-SECURITY-Security-ALL STATIONS
THIS IS-BLUE DUCK-WA 1234
A LOG APPROXIMATELY TWENTY FEET LONG
TWO FEET IN DIAMETER ADRIFT OFF HAINS
POINT
POTOMAC RIVER
WA 1234-OUT"
page 49
◆ Coast Guard Channels
The government frequency 2182 kHz and 2670 kHz are widely used
by recreational boating operators for communicating with U.S. Coast
Guard shore stations and ship stations, and with USCG Auxiliary
vessels when these vessels are operating under orders. When using
these channels, you must first establish communications on the appropriate calling frequency, 2182 kHz on the following long range Coast
Guard channels:
COAST GUARD CHANNELS
Yo u r
Tr a n s m i t
Yo u r
R e c e ive
I . T. U .
Channels
2182 kHz
2182 kHz
None
International distress &
calling frequency to all
Coast Guard & Rescue
agencies worldwide.
2670 kHz
2670 kHz
None
U.S. Coast Guard working
channel.
4134 kHz
4426 kHz
424
500-mile Coast Guard
working channel.
6200 kHz
6501 kHz
601
Gulf Coast Guard
working channel.
8240 kHz
8764 kHz
816
Medium-range Coast
Gaurd working channel.
12242 kHz
13089 kHz
1205
Long-range 24-hour Coast
Guard working channel.
16432 kHz
17314 kHz
1625
Day/evening long-range
Coast Gaurd working
channel.
page 50
Remarks
TIP!
Consult your ICOM SSB frequency chart to see where these
channels are in your set's memory.
◆ Operating Procedures - Regular Communications
It's very important that you monitor a frequency at least one minute
prior to transmitting over it. This insures that you won't "cover up" any
communications that may be going on that you might not hear clearly
at first. Always wait until a frequency is clear before transmitting.
The following procedures for operating your marine SSB are approved
by the Radio Technical Commission for Maritime Services in cooperation with the Federal Communications Commission:
Safety Frequencies
The following table describes the distress and safety frequencies
between 4000-27,500 kHz for ship and coast stations, public and
private, operating voice radiotelephony (HF-SSB).
SAFETY FREQUENCIES
FREQUENCY
CHANNEL
DESIGNATOR
4125.0
"4 Safety"
6125.0
"6 Safety"
8291.0
"8 Safety"
12290.0
"12 Safety"
16420.0
"16 Safety"
Operating Procedures (other than Distress, Urgency and Safety)
page 51
◆ Maintain a Watch
Whenever your marine VHF or SSB radio is turned on, keep the receiver tuned to the appropriate distress and calling frequency, 156.8
(VHF Channel 16) or 2182 kHz. This listening watch must be maintained at all times the station is in operation and you are not actually
communicating. The Coast Guard maintains a silent period on 2182
kHz for three minutes immediately after the hour and for three minutes
immediately after the half hour. During these silent periods only messages or transmissions concerning distress or urgency are made.
Since this watch is required for safety and to facilitate communications
by providing a common calling channel, it is not permissible for one
vessel in a fleet of vessels traveling together to maintain this watch
while the other vessels guard another channel, such as a common
intership channel. You may maintain a watch on a working channel,
however, and may establish communications directly on that channel
provided you simultaneously maintain your watch on the distress and
calling channel.
Record the times you maintain this watch in your Radio Log.
◆ Choose the Correct Channel or Frequency
Ship-to-Ship Channels
Each of the marine frequencies and channels is authorized for a
specific type of communication. It is required that you choose the
correct channel for the type of communication you are making. For
example, certain channels are set aside exclusively for intership use.
See the following chart.
page 52
SHIP FREQUENCIES (SIMPLEX)
(USB)
MINIMUM
RANGE
INFORMAL
CHNL CODE
FREQUENCY
kKz
BEST TIME
50 miles
Ship 2-A
2065.0
Night
50 miles
Ship 2-B
2079.0
Night
50 miles
Ship 2-C
2096.5
Night
50 miles
Ship 3-A
3023
Night
150 miles
Ship 4-A
4146
Night
150 miles
Ship 4-B
4149
Night
150 miles
Ship 4-C
4417
Night
170 miles
Ship 5-S
5680
Day/Night
200 miles
Ship 6-A
6224
Day/Night
200 miles
Ship 6-B
6227
Day/Night
200 miles
Ship 6-C
6230
Day/Night
200 miles
Ship 6-D
6516
Day/Night
400 miles
Ship 8-A
8294
Day
400 miles
Ship 8-B
8297
Day
1000 miles
Ship 12-A
12353
Day
1000 miles
Ship 12-B
12356
Day
1000 miles
Ship 12-C
12359
Day
5000 miles
Ship 16-A
16528
Day
5000 miles
Ship 16-B
16531
Day
5000 miles
Ship 16-C
16534
Day
5000 miles
Ship 18-A
18840
Day
5000 miles
Ship 18-B
18843
Day
10,000 miles
Ship 22-A
22159
Day
10,000 miles
Ship 22-B
22162
Day
10,000 miles
Ship 22-C
22165
Day
10,000 miles
Ship 22-D
22168
Day
10,000 miles
Ship 22-E
22171
Day
10,000 miles
Ship 25-A
25115
Day
10,000 miles
Ship 25-B
25118
Day
page 53
◆ Calling Another Ship
Turn your radiotelephone on and listen on the appropriate distress and
calling frequency, 2182 kHz, to make sure it is not being used. If it is
clear, put your transmitter on the air. This is usually done by depressing the "push to talk" button on the microphone. (To hear a reply, you
must release this button.)
Speak directly into the microphone in a normal tone of voice. Speak
clearly and distinctly. Call the vessel with which you wish to communicate by using its name; then identify your vessel with its name and
FCC assigned call sign. Do not add unnecessary words and phrases as
"COME IN BOB" or "DO YOU READ ME." Limit the use of
phonetics to poor transmission conditions.
This preliminary call must not exceed 30 seconds. If contact is not
made, wait at least two minutes before repeating the call. After this
time interval, make the call in the same manner. This procedure may be
repeated no more than three times. If contact is not made during this
period, you must wait at least 15 minutes before making your next
attempt.
Once contact is established on 2182 kHz, you must switch to an
appropriate working frequency for further communication. You may
only use VHF Channel 16 and 2182 kHz for calling, and in emergency
situations.
Since switching to a working frequency is required to carry out the
actual communications, it is often helpful to monitor the working
frequency you wish to use, briefly, before initiating the call on
2182 kHz. This will help prevent you from interrupting other users of
the channel.
All communications should be kept as brief as possible and at the end
of the communication, each vessel is required to give its call sign, after
which, both vessels switch back to the distress and calling channel in
order to reestablish the watch.
page 54
Two examples of acceptable forms for establishing communication with
another vessel follow:
EXAMPLE 1
VESSEL
VOICE TRANSMISSION
BLUE DUCK
(on 2182 kHz)
"MARYJANE-THIS IS-BLUE DUCK-WA 1234"
MARY JANE
(on 2182 kHz)
"BLUE DUCK-THIS IS-MARY JANEWA 5678-REPLY 8A"
(or some toher proper working channel.)
BLUE DUCK
(on 2182 kHz)
"8A" ie "ROGER"
(If unable to replay on the channel selected,
an appropriate alternate should be selected.)
BLUE DUCK
(on working
channel 8A)
"BLUE DUCK"
MARY JANE
(on working
channel 8A)
"MARY JANE"
BLUE DUCK
(on working
channel 8A)
with
message
((Continue
Continue w
ith m
essage and
and terminate
terminate
minutes.
ccommunications
ommunication wwithin
ithin trthree
hree m
inutes. At
At
the
the end
end of
of the
the communications,
communicaiton, eeach
ach vvessel
essel
ggives
ives iits
ts call
call sign.)
sign.)
EXAMPLE 2
VE S S E L
BLUE DUCK
(on 2182 kHz)
VO I C E T R A N S M I S S I O N
"MARYJANE-BLUE DUCK-WA 1234-REPLY"
MARY JANE
(on 4A)
"MARY JANE-WA 5678"
BLUE DUCK
(on 4A)
"BLUE DUCK"
(Continues message and terminate
communicaitons as indicated in example 1)
A short form most useful when both parties
are familiar with it
page 55
CHAPTER 15
Using Your SSB for Low-Cost E-Mail
Marine SSB will accept the radio modem and computer on rear accessory plugs.
Your new SSB transceiver may have many channels designated for narrow-band direct printing (NBDP). These are frequencies for simplex
telex over radio (SITOR) which has been the established mode of maritime communications for the merchant shipping industry for more than
50 years. SITOR is electronic e-mail over marine frequencies. All you
need is a computer and a radio modem to complete the
marriage to your marine SSB. With this equipment, you will be able to
send and receive e-mail over worldwide frequencies.
Using your lap-top computer and a special modem and your new ICOM
SSB, you can send and receive written text messages far more
efficiently than voice messages. Written messages allow you to think
through what you want to say ahead of time, format your message
off-line in your computer, and then send it off with a few
keystrokes, right from your vessel at anytime, day or night, anywhere
in the world. Your SITOR one-third page of text can go in less than 2 or
3 minutes or often less than the minimum air time voice telephone
charge. If you have several pages of text, it could take up to 10-30
minutes, but you are assured of "solid copy" at the other end of the
page 56
circuit. You can also receive e-mail as well. Inbound traffic for your
vessel is saved in your vessel's own mailbox in the host computer until
you are ready to receive it. People on shore can access the system by
the Internet, or any one of the several commercial e-mail system such
as CompuServe, AOL, Telex, FAX, or voice transcription, using the
public telephone system via any of the common carriers. You can
also use your computer and your SSB to receive, free of charge,
weather facsimile imagery directly from the Coast Guard. You can also
receive high-quality weather forecast charts in your mailbox for
downloading at your convenience through private yacht weather
forecasting companies.
Electronic e-mail over marine SSB circuits are carried on by more than
200 radio telex shore stations in the world as described in the admiralty
list of radio signals. All of these worldwide data stations have been
coordinated in respect to international billing arrangements for ships
of all nations which wish to connect to any foreign coast station along
the route of their voyage. Two companies, Globe Wireless, and PinOak
Digital offer worldwide networks of pickup and relay stations with
only one administration to deal with as you make your international
voyage. These networks, of high-frequency coast radio stations are
designed to provide both spacial and frequency-diverse channel capacity to all mariners around the globe. Multiple propagation paths together with automated control of the ship's existing high-frequency SSB
radio system provide transmission quality and link availability not previously obtainable on similar voice circuits. Traffic lists, message traffic, and other data services are sent throughout all of the world wide
network e-mail stations, and downloaded easily with your shipboard
lap-top computer.
The typical cost for a SITOR message is about $2.00 a minute, where
approximately 300 characters can be sent per minute. This works out
to be about three cents per word. If you plan to send high volumes of
data on your computer on an almost daily basis, PinOak Digital and
Globe Wireless offer other types of high speed data transfer systems
that allow you to send and receive messages in about one-tenth the
time as normal SITOR.
page 57
Did You Know?
For more information about the Globe Wireless e-mail
connection to your ICOM SSB, contact Globe Wireless at
(800) 876-7234.
For more information about PinOak Digital High
Frequency Digital Communications, call (800) 746-625l.
For more information about SAILMAN visit their
website at www.sailmail.com
CHAPTER 16
Review: SSB Channel Designators
Explained
Your friends with marine SSB may tell you. . .
To talk local, you want to go on 4A. They sometimes call that 4-alpha.
It's good in the mornings, and 4-alpha on your set is 4-2. Some sets
have it as 4-1, but that's really 4-S. You can look up this channel as 451,
which is really 4146. Got it?"
The mysteries of SSB channelization get worse. Did you know that
international distress frequency 2182 kHz may NOT be the best place
to cry Mayday when you are halfway across the sea?
Single Sideband
And if you call Mayday on Coast Guard working channel 816 or 1205,
they could be "duplexing" a weather report and not listening to their
input frequency. So WHO do you call in an emergency, anyway, on
marine SSB?
And what about making phone calls? Are you really charged $25 just
for getting an answering machine? I am happy to report, NO.
page 58
Did You Know?
For more information about the Globe Wireless e-mail
connection to your ICOM SSB, contact Globe Wireless at
(800) 876-7234.
For more information about PinOak Digital High
Frequency Digital Communications, call (800) 746-625l.
For more information about SAILMAN visit their
website at www.sailmail.com
CHAPTER 16
Review: SSB Channel Designators
Explained
Your friends with marine SSB may tell you. . .
To talk local, you want to go on 4A. They sometimes call that 4-alpha.
It's good in the mornings, and 4-alpha on your set is 4-2. Some sets
have it as 4-1, but that's really 4-S. You can look up this channel as 451,
which is really 4146. Got it?"
The mysteries of SSB channelization get worse. Did you know that
international distress frequency 2182 kHz may NOT be the best place
to cry Mayday when you are halfway across the sea?
Single Sideband
And if you call Mayday on Coast Guard working channel 816 or 1205,
they could be "duplexing" a weather report and not listening to their
input frequency. So WHO do you call in an emergency, anyway, on
marine SSB?
And what about making phone calls? Are you really charged $25 just
for getting an answering machine? I am happy to report, NO.
page 58
So let's demystify that new marine SSB installation, and compare the
channels and frequencies listed in this chapter with what is stored in
your SSB's memory.
ALL THOSE CHANNELS. Marine SSB frequencies are assigned
specific channels within the following megahertz regions:
MEGAHERTZ REGIONS
CHANNEL
MHZ
APPROXIMATE RANGE
2 XX
2 MHz
100 miles day; 1000 miles night
4 XX
4 MHz
100 miles day; 1500 miles night
6 XX
6 MHz
500 miles; 1500 miles night
8 XX
8 MHz
700 miles day; 2000 miles night
12 XX
12 & 13 MHz
16 XX
17 & 17 MHz
22 XX
22 MHz
100 miles evenings; 3000 miles
days
Unreliable evenings; 4000 miles
days
Daytime only band, worldwide
Each band of marine frequencies skips off the ionosphere and refracts
signals back down to earth at different angles. 2 and 4 MHz come back
down relatively close to your vessel. 8 and 12 MHz are excellent for
medium-range, day and night, skywave "skip" contacts. On 16 and 22
MHz, skywaves fade out at night, but offer the longest range during daylight hours. The best range usually follows the direction of the sun.
Choose the megahertz range that will skip your signal to the
approximate distance you want to reach. 8 and 12 MHz are the
favorites during the day, and 4 and 6 MHz are the favorite bands
during the night. 2 MHz is clobbered with noise, and you won't get zip.
22 MHz is too high for reliable daily contacts. Choose 8 and 12 MHz
as your "bread and butter" bands.
page 59
Marine radio channels are assigned ITU designators. ITU stands for
International Telecommunications Union, and assigns commonality
to every country's marine SSB set.
But there are differences between each manufacturer of SSB equipment
on how they read out the channels, so stay tuned. More to follow.
Most 2 MHz frequencies have little use even 2182 MHz, the international
distress and calling frequency. The range is so limited, you would do
better to squawk Mayday on VHF channel 16. Most 2 MHz frequencies
go by their actual numerical frequency kilohertz, not by three-digit
channel designators. Lucky for us, a kilohertz readout on the radio dial
is common among all marine SSB radios in every country.
4 MHz to 22 MHz marine channels are all listed by a three-digit or
four-digit channel designator. An example would be marine Channel
401, or marine Channel 809, or marine Channel 1206. These channel numbers, common worldwide, are assigned to pairs of radio frequencies that
make up a radio channel. Both the marine telephone companies of the
world and the United States Coast Guard and rescue agencies throughout
the world operate on frequency PAIRS where they transmit on one frequency, and listen on another. This is called DUPLEX. But you don't need
to worry about the individual frequencies for ship transmit and ship receive because your marine SSB has all of these channels pre stored in ITU
memory. If you dial up marine Channel 808, your set automatically receives on 2740 kHz, and transmits automatically on 8216 kHz. It is prestored duplex, so all you need to know is the channel number and what
service goes with which channel numbers.
Currently, AT&T runs the high seas maritime radiotelephone services
from three stations that serve this half of the world. However in the
future, access will be through station WLO out of Mobile Alabama.
AT&T will be limiting the service provided by KMI, WOM, and WOO.
From Australia to Africa and everything in between, the AT&T marine
operator offers you radiotelephone service on the following channels:
page 60
AT&T MARINE OPERATOR
AT&T
SAN FRANCISCO
KMI
401, 416, 417
AT&T
FLORIDA
WOM
403, 412, 417
AT&T
NEW JERSEY
WOO
410, 411, 416
804, 809, 822
423, 802, 810
808, 811, 815
1201, 1202, 1203
814, 825, 831
1203, 1210, 1211
1229, 1602, 1603
1206, 1208, 1209
1605, 1620, 1626
1624, 2214, 2223
1215, 1223, 1601
2201, 2205, 2210
2228, 2236
1609, 1610, 1611
2236
1616, 2215, 2216
2222
TIP!
Choose the channel on a likely frequency that will skip
your waves into the particular AT&T maritime services
station closest to you. If you're in the South Seas, you might
try Channel 1602 to AT&T coast station in California. If
you're in the Caribbean, try AT&T coast station in Florida
on Channel 403. And if you're sailing to Spain, you might
to try AT&T coast station New Jersey on 1203. Otherwise
use the WLO Frequencies listed below.
WLO ITU CHANNELS
Channel Number
RX Frequency
TX Frequency
405 ..................................... 4369.0 ......................... 4077.0
414 ..................................... 4396.0 ......................... 4104.0
419 ..................................... 4411.0 ......................... 4119.0
607 ..................................... 6519.0 ......................... 6218.0
824 ..................................... 8788.0 ......................... 8264.0
WLO ITU Channels continued on page 62
page 61
WLO ITU CHANNELS
Channel Number
RX Frequency
TX Frequency
829 ..................................... 8803.0 ......................... 8279.0
830 ..................................... 8806.0 ......................... 8282.0
1212 ................................. 13110.0 ....................... 12263.0
1225 ................................. 13149.0 ....................... 12302.0
1226 ................................. 13152.0 ....................... 12305.0
1607 ................................. 17260.0 ....................... 16378.0
1641 ................................. 17362.0 ......................... 1648.0
1647 ................................. 17380.0 ....................... 16498.0
2237 ................................. 22804.0 ....................... 22108.0
Contact Rene Stiegler of WLO radio for information and
frequency information packs. PH:(334)665-5110,
FX:(334)666-8339, or [email protected] or [email protected]
Try tuning these channels in now and listen to the ship-to-shore traffic.
You will hear only the shore side of the conversation because the ships
are transmitting duplex. Phone calls cost under $5 a minute, with no
land-line charges. There is a 3-minute minimum, so once you start
gabbing, go for 3 minutes and make it a $15 bill. If you get an
answering machine, tell the operator to cancel the call, and you pay
nothing. Radio checks with AT&T are free. Calling the Coast Guard
through AT&T is also free. What? Calling the Coast Guard through
the high seas marine telephone service? Why?
COAST GUARD CHANNELS
2182 kHz - Distress
424
Working, Weather, AMVER
Channel
601
Working, Weather, AMVER
Channel
816
Working, Weather, AMVER
Channel
1205
Working, Weather, AMVER
Channel
625
Working, Weather, AMVER
page 62
These are United States Coast Guard weather, AMVER, and working
channels and are not necessarily monitored 24 hours a day for a
distress call. These are the channels where you will hear automated
Coast Guard weather. It is digital speech synthesized, and will sound
like someone sitting on a fish hook.
If you need the Coast Guard anywhere in the world, call on the high
seas marine operator duplex channels. I guarantee they are listening
because they're looking to make money on an incoming phone call.
They won't make money on a Coast Guard call because they'll patch
you through free. But once your situation is stabilized, the Coast Guard
will ask you to switch over to one of their working channels. Suggest a
channel near the MHz band you are presently going through the
marine operator on. Just look at your radio dial—if it's reading 1201,
then you are on the 12 MHz band. You would suggest to the Coast
Guard you can work them on ITU Channel 1205. Switch over, and you
will hear their friendly voice.
Did You Know?
The Coast Guard tracks commercial shipping all over the
world on a computer in New York—and if you need help
or evacuation anywhere out on the sea they can probably
find someone within 300 miles of you and request them to
divert and lend assistance. This is part of the Coast Guard's
AMVER program.
Ship-to-Ship
Here is where SSB radio manufacturers have split from the normal
channeling scheme. Here are the channel designators that SHOULD
come up on your marine SSB for ship to-ship safety and routine calls:
page 63
CHANNEL DESIGNATORS
CHANNEL
FREQUENCY
4-0
4-1
4125 kHz
4146 kHz
Safety, "4S"
Ship-to-Ship, "4A"
4-2
4149 kHz
Ship-to-Ship, "4B"
4-3
4417 kHz
Ship-to-Ship, "4C"
6-0
6125 kHz
Safety, "6S"
6-1
6224 kHz
Ship-to-Ship, "6A"
6-2
6227 kHz
Ship-to-Ship, "6B"
6-3
6230 kHz
Ship-to-Ship, "6C"
6-4
6516 kHz
Ship-to-Ship, "6C"
8-0
8291 kHz
Safety, "8S"
8-1
8294 kHz
Ship-to-Ship, "8A"
8-2
8297 kHz
Ship-to-Ship, "8B"
12-0
12.290 kHz
Safety, "12S"
12-1
12.353 kHz
Ship-to-Ship, "12A"
12-2
12.356 kHz
Ship-to-Ship, "12B"
12-3
12.359 kHz
Ship-to-Ship, "12C"
12-4
12.362 kHz
Ship-to-Ship, "12C"
12-5
12.356 kHz
Ship-to-Ship, "12E"
16-0
16.420 kHz
Safety, "16S"
16-1
16.528 kHz
Ship-to-Ship, "16A"
16-2
16.528 kHz
Ship-to-Ship, "16B"
16-3
16.534 kHz
Ship-to-Ship, "16C"
22-8
22.159 kHz
Ship-to-Ship, "22A"
22-9
22.162 kHz
Ship-to-Ship, "22B"
22-0
22.165 kHz
Ship-to-Ship, "22C"
22-4
22.168 kHz
Ship-to-Ship, "22C"
22-5
22.171 kHz
Ship-to-Ship, "22E"
page 64
USE AND DESIGNATOR
TIP!
Not all marine SSB transceivers list these ship-to-ship
channels by the ITU duplex number. Most ICOM marine
SSB transceivers list ship-to-ship simplex frequencies by
the megahertz band, a hyphen, and numbers 1 through 9.
Sometimes the number l and 2 correspond with ship-toship A and B channels, yet other times they number up
from the safety channel so A now becomes "-2." But not to
worry, just double check the frequency with the ship-toship channels and frequencies I have just listed, and go
with the frequency.
The safety channels are restricted to navigation. Safety, and weather
information, similar to what takes place on marine VHF channel 6. No
gabbing on the marine SSB safety channels. The marine ship-to ship
channels may also be used by private coast stations so you can talk
from ship to shore and bypass the marine operator. Towing and
salvage companies, plus marine stores regularly conduct business on
ship-to-ship channels 4A, 8A, and 12A. Now go back to the list and
double check the frequencies:
4A = 4146 kHz
8A = 8294 kHz
12A = 12,353 kHz
Find these channels on your own SSB radio, and verify the channel
number agreeing with the actual ship-to-ship/ship-private coast shore
frequency.
If you're cruising, the Federal Communications Commission offers additional 4 MHz and 8 MHz channels for ship-to-ship communications.
This will relieve all of the congestion now found on popular channels
4A, 4B, 8A and 8B. At last—"secret" ship-to-ship SSB
frequencies that are perfectly legal under FCC Rule 80.374 (b) (c).
page 65
"SECRET" SHIP-TO-SHIP FREQUENCIES
4 MHz SHIP-TO-SHIP
FREQUENCIES
4000
4003
8 MHz SHIP-TO-SHIP
FREQUENCIES
8101
8104
4006
8107
4009
8110
4012
8116
4015
8119
4018
8122
4021
8125
4024
8131
4027
8134
4030
8137
4033
8140
4036
8143
4039
8146
4042
8149
4045
8152
4048
8155
4051
8158
4054
8161
4057
8164
8157
8170
8173
8176
8179
8182
8185
8188
8191
page 66
The FCC Rules state, "These frequencies are shared with fixed
services, and marine ship-to-ship operation must not cause harmful
interference to those other services." In other words, if you and a
cruising buddy land on a frequency and overhear shore traffic
complaining about your ship-to-ship communications, switch off that
channel in the table above.
Shore stations will continue to monitor their regular frequencies on 4
and 8 Alpha and Bravo frequencies, no charge. But mariners wishing
to intercommunicate ship-to-ship on 4 MHz and 8 MHz may now switch
to these new, very quiet SSB channels in full compliance with FCC
rules. In fact, 4030 MHz is fast becoming the Baja "intercom" channel
for mariners with SSB transceivers.
In the Caribbean to Panama canal, try 4054. Hams in the canal, listen
7083 to 7085 lower sideband.
HOT WEATHER FACSIMILE CHANNELS
ALL UPPER SIDEBAND:
Pacific Coast
8680.1 kHz
Pacific Coast/Long-Range
12,728.1 kHz
Hawaii
11,088.1 kHz
Pacific/Hawaii
16,133.1 kHz
Hawaii
9980.6 kHz
New Gulf Frequencies
4316, 8502, 12,788 kHz
Boston
6340.5 kHz
Atlantic
10,863.2, 12,748.1, 8078.1, 15,957 kHz
page 67
TIP!
You might also memorize aeronautical East Coast and West
Coast tower channels 13,282 and 13,270 kHz. I would also
fill up one of those user-programmable memory channels
with 13,300 and 5547 kHz, both upper sideband, aeronautical in-route frequencies. If you can’t raise the Coast
Guard in an emergency, squawk Mayday to an airliner!
It's been done before.
FCC rules prohibit a marine radio being shared with another radio
service. But if you are a voluntary equipped boat, you are not required
by law to have a marine radio onboard—so one day you consider it a
marine radio, and the next day you consider that marine radio a ham
radio. Trust me. It works, but only if the marine radio has capabilities
already unleashed as an amateur radio.
You could store the ham FREQUENCIES into any one of the 100 or
more user-programmable marine channels on a modem ICOM marine
SSB radio. A sample:
3968 kHz, lower sideband, West Coast marine nets
7268 kHz, lower sideband, East Coast waterway net
7238 & 7294 kHz, lower sideband, morning West Coast nets
14.300 kHz, upper sideband, 24-hour ham maritime mobile nets
14.340 kHz, upper sideband, West Coast 11 :00 a.m. mañana net
14,313 kHz, upper sideband, Pacific evening maritime net
21,402 kHz, upper sideband, Pacific and South Pacific
You need an amateur license to talk on these frequencies, but you don't
need a license to listen and glean great weather information. In an emergency, you can holler for help on these frequencies without any questions asked. But it better be a real life-and-death emergency. You know
how hams are. I'm one of them, too!
page 68
Finally, your SSB transceiver can be put into the AM double sideband
mode, and the time signals and shortwave broadcast frequencies memorized to get up-to-date weather information the correct time, and the
latest news from BBC and Voice of America.
5, 10, 15 and 20 MHz time signals
5975 kHz AM shortwave
7435 kHz AM shortwave
9575 kHz AM shortwave
11, 835 kHz AM shortwave
13,760 kHz AM shortwave
15,120 kHz AM shortwave
Tune anywhere around these AM shortwave frequencies for plenty of
foreign and USA broadcasts.
Your best radio check is with the high seas marine operator. You must
call them for a minimum of 45 seconds in order for them to beam you
in with their massive antenna systems. A quick call will lead to no
contact. Make it a long call, giving your vessel name, official FCC call
sign or ship registration number, your position, the ITU channel you
are communicating over, and repeat the process over and over and over
and over again for 45 total seconds. Close talk the mic—push the plastic right up against your lips. If you talk 6 inches away from the mic,
your power output will be zilch. SSB mic are all noise canceling, and
you must absolutely touch the mic to your lips to get a signal out on the
airwaves.
As you talk, you may notice your panel lights blinking, your anemometer exceeding 100 knots, your electric head going into the masticate
mode, and various other pieces of marine electronics including autopilots going nuts on transmit. This is perfectly normal. It means you're
putting out one walloping signal. You must live with it. There is no
simple cure.
page 69
TIP!
Your radio check to the marine operator should finally
achieve success on one of their working channels. If one
megahertz band doesn't work, dial in another marine operator in another part of the country, and give THEM a try.
Or tail in at the end of another ship contact when
the marine operator is ready to sign off. If you can hear the
marine operator well, they should pick you up as well.
One of the best radio checks is from the technician that installed the
marine SSB. Don't let them off the ship until they reach a marine
operator at least 1,000 miles away and get a good radio check on the
air. Accept no excuses. I have seen marine SSB installations that LOOK
good on a wattmeter, but over the air SOUND bad. An improperly
installed automatic antenna tuner cable rectifies the RF wave and brings
it back into the radio, scrambling your audio to sound like you are
talking underwater. You can't see it on a meter, but you'll sure know
you have this problem if absolutely nobody comes back to your
request for radio checks.
With more and more radiotelephone calls going satellite aboard ships,
be assured that the high seas marine SSB radiotelephone service is
looking for more activity out there on the airwaves, and the technicians
are eager to get you into their computers and will regularly run radio
checks with you to give you the confidence of knowing they can reach
out almost anywhere to take your incoming or outgoing phone call.
Radio checks are free.
page 70
Did You Know?
The marine SSB radio manufacturers are delivering equipment designed more for the radio guru than the active sailor
with things on the mind other than is 451 really 4-1 or is it
really 4-alpha? ICOM's M710 marine SSB has the capability of programming the screen to read out the channel
function in addition to just the channel number and frequency. Great idea.
A marine SSB is a powerful communications device for worldwide
cruising and sailing. Know its capabilities, and know what the
channels can do for you. There is absolutely nowhere in the world that
you could cruise that you couldn't get back to a shore-side station on
marine SSB on one of the megahertz bands. EVERYWHERE there are
domestic and foreign shore-side stations ready to take your duplex channel activity. The modern marine SSB has all of these channels in
memory. Now you know where to go to make that ship-to-ship,
ship-to-shore, or emergency distress call.
page 71
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Station Name
Call
I.T.U. Channel #
ALBANIA
Durres P.T. Radio
ZAD
402, 805, 1206, 1639,
2226
ALGERIA
Alder Radio
7TA
410, 413, 424, 426, 601,
603, 605, 802, 809, 813,
825, 1207, 1215, 1217,
1232, 1629, 1631, 1636,
1641, 2205, 2225, 2227,
2238
Bahia Blanca Radio
Corrientes Radio
General Pacheco Radio
LPW
LPB
LPL
Ushuaia Radio
LPC
406, 421, 601, 818, 821
424, 810
413, 421, 426, 603, 606,
802, 814, 821, 1220,
1221, 1601, 1621, 2204,
2221
410, 812, 1230
Adelaide Radio
Brisbande Radio
VIA
VIB
Broome Radio
Carnarvon Radio
Darwin Radio
VIO
VIC
VID
Esperance Radio
Hobart Radio
Melbourne Radio
Perth Radio
Rockhampton Radio
Sydney Radio
VIE
VIH
VIM
VIP
VIR
VIS
Thursday Island Radio
Townsville Radio
VII
VIT
AZORES
Miguel Radio
CUG
426, 813, 1207, 1615,
1632, 2207, 2222
BAHRAIN
Bahrain Radio
A9M
413, 806, 1209, 1618
ARGENTINA
AUSTRALIA
page 72
419, 424, 603, 817, 1227
404, 415, 424, 603, 811,
1229
424, 603
424, 603
415, 424, 603, 811, 815,
1227, 1229
424, 603
424, 603
404, 424, 603, 811, 1226
404, 424, 603, 811, 1226
424, 603
405, 417, 424, 603, 802,
829, 1206, 1231, 1602,
1610, 2203, 2223,
424, 603
419, 424, 603, 817
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
BANGLADESH
Station Name
Call
I.T.U. Channel #
Chittagong Radio
S3D
Khulna Radio
S3E
BARBADOS
Barbados Radio
8PO
407, 816, 825, 1213,
1640
BELGIUM
Oostende Radio
OSU
408, 411, 417, 421, 422,
425, 602, 606, 803, 805,
806, 812, 813, 815, 821,
829, 1207, 1213, 1215,
1218, 1219, 1221, 1609,
1613, 1621, 1625, 1627,
1630, 2209, 2214, 2219,
2221, 2225, 2239
BERMUDA
Bermuda Radio
VRT
410, 603, 817, 1220,
1618
Belem Radio
PPL
Fortaleza Radio
Ilheus Radio
Itajai Radio
Juncao Radio
PPF
PPI
PPC
PPJ
Manaus Radio
PPM
Natal Radio
Olinda Radio
PPN
PPO
Rio Radio
PPR
Salvador Radio
PPA
Santarem Radio
PPT
404, 405, 419, 819, 821,
822, 830, 1228, 1633
819, 821, 828
404, 405, 819, 821, 824
404, 405, 819, 821, 822
404, 409, 419, 819, 821,
824, 828, 1228, 1617
404, 405, 416, 819, 821,
830
404, 409, 819, 821, 830
404, 405, 419, 821, 824,
828, 1211, 1606
404, 405, 409, 416, 419,
819, 821, 822, 828, 830,
1214, 1221, 1611, 1613,
1621, 2221, 2238
404, 409, 416, 819, 821,
822
404, 409, 819, 821, 824,
1209
BRAZIL
402, 416, 421, 602, 806,
821, 1202, 1221, 1603,
2202
418, 416, 421
page 73
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
BRAZIL
(CONT'D)
CANADA
CAPE
VERDE
CHILE
page 74
Station Name
Call
I.T.U. Channel #
Santos Radio
PPS
S. Luis Radio
Vitoria Radio
PPB
PPV
Cambridge Bay
Coast Guard Radio
Coppermine
Coast Gaurd Radio
Coral Harbor Coast
Guard Radio
Frobisher Bay
Coast Guard Radio
Goose Bay
Coast Guard Radio
Halifax
Coast Guard Radio
Inuvik
Coast Guard Radio
Killinek
Coast Gaurd Radio
Resolute
Coast Guard Radio
Vancouver
Coast Guard Radio
Vancouver Radio
(B.C. Tel.)
VFC
403
VFU
403
VFU
407
VFF
407, 603, 812, 1201,
1634
408
VFZ
404, 409, 416, 819, 821,
824, 1219
404, 409, 819, 821, 824
404, 409, 416, 819, 821,
828
VFA
413, 418, 605, 823, 1213,
1604
403
VAW
407
VFR
407, 825
VAI
CFW
410, 605, 807, 1207,
1608, 2220
418
Praia de Dabo Verde
Radio
S. Vicente de Cabo
Verde Radio
D4D
418, 820, 1218, 1623
D4A
418, 820, 1218, 1623
Valparaiso Playa Ancha
Radiomaritima
CBV
419, 421, 425, 601, 606,
807, 809, 815, 821, 1210,
1218, 1221, 1224, 1621,
1631, 1640, 2221, 2225,
2240
VCS
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
COLOMBIA
Station Name
Call
I.T.U. Channel #
Barranquilla Radio
Buenaventura Radio
HKB
HKC
406, 826, 1203, 1615
406, 826, 1203, 1615
Rarotonga Radio
ZKR
821, 825
Havana Radio
Sntiago de Cuba Radio
CLA
CLM
401, 418
418, 809, 1217, 1626
CYPRUS
Cyprus Radio
5BA
406, 141, 421, 426, 603,
606, 807, 818, 820, 821,
829, 1201, 1208, 1221,
1230, 1603, 1621, 1632,
2212, 2218, 2221
DENMARK
Lyngby Radio
OXZ
401, 403, 409, 415, 418,
420, 421, 424, 425, 426,
603, 605, 606, 801, 808,
811, 813, 818, 821, 823,
825, 827, 829, 1203,
1210, 1211, 1214, 1215,
1217, 1219, 1221, 1223,
1226, 1601, 1603, 1605,
1608, 1614, 1617, 1618,
1621, 1622, 1635, 1641,
2203, 2208, 2211, 2213,
2216, 2218, 2228, 2234,
2236
DJIBOUTI
Djibouti Radio
J2A
418, 827, 1210
Alexandria Radio
SUH
418, 605, 817, 1216,
1610, 2226
ETHIOPIA
Assab Radio
ETC
403, 605, 805
FIJI
Suva Radio
3DP
406, 810
COOK
ISLAND
CUBA
EGYPT
page 75
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
COLOMBIA
Station Name
Call
I.T.U. Channel #
Barranquilla Radio
Buenaventura Radio
HKB
HKC
406, 826, 1203, 1615
406, 826, 1203, 1615
Rarotonga Radio
ZKR
821, 825
Havana Radio
Sntiago de Cuba Radio
CLA
CLM
401, 418
418, 809, 1217, 1626
CYPRUS
Cyprus Radio
5BA
406, 141, 421, 426, 603,
606, 807, 818, 820, 821,
829, 1201, 1208, 1221,
1230, 1603, 1621, 1632,
2212, 2218, 2221
DENMARK
Lyngby Radio
OXZ
401, 403, 409, 415, 418,
420, 421, 424, 425, 426,
603, 605, 606, 801, 808,
811, 813, 818, 821, 823,
825, 827, 829, 1203,
1210, 1211, 1214, 1215,
1217, 1219, 1221, 1223,
1226, 1601, 1603, 1605,
1608, 1614, 1617, 1618,
1621, 1622, 1635, 1641,
2203, 2208, 2211, 2213,
2216, 2218, 2228, 2234,
2236
DJIBOUTI
Djibouti Radio
J2A
418, 827, 1210
Alexandria Radio
SUH
418, 605, 817, 1216,
1610, 2226
ETHIOPIA
Assab Radio
ETC
403, 605, 805
FIJI
Suva Radio
3DP
406, 810
COOK
ISLAND
CUBA
EGYPT
page 76
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
FRANCE
Station Name
Call
I.T.U. Channel #
S. Lys Radio
FFL
404, 405, 416, 419, 817,
825, 828, 830, 1222,
1226, 1229, 1231, 1604,
1619, 1628, 1633, 2204,
2226, 2231, 2235
S. Paul et Amsterdam
Radio
FJY
411, 825
FINLAND
Hanko Radio
Helsinki Radio
OFI
OHG
406, 413, 141, 417, 422
406, 413, 414, 417, 422,
802, 804, 805, 809, 829,
1206, 1209, 1213, 1216,
1224, 1227, 1230, 1606,
1611, 1614, 1615, 1623,
1636, 1638, 2204, 2210,
2214, 2222, 2231
GAMBIA
Banjul Radio
C5G
405, 829
Norddeich Radio
DAP
Ruegen Radio
Y5P
401, 824, 1205, 1610,
2217
405, 407, 410, 419, 802,
809, 826, 831, 1202,
1204, 1206, 1232, 1619,
1629, 1633, 1640, 2220,
2224, 2226, 2230
Takoradi Radio
9GA
Tema Radio
9GX
Gilbraltar Naval Radio
GYU
FRENCH
SOUTHERN
&
ANTARCTIC
LANDS
GERMANY
GHANA
GIBRALTAR
402, 601, 823, 1202,
1616, 2213
409, 602, 825, 1224,
1622, 2215
401, 404, 602, 807, 1212,
1611, 2212
page 77
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Station Name
Call
I.T.U. Channel #
GREECE
Athinai Radio
SVN
413, 415, 424, 425, 603,
802, 806, 808, 809, 814,
819, 820, 823, 1204,
1207, 1212, 1220, 1232,
1607, 1609, 1625, 1626,
1627, 1629, 1640, 2217,
2219, 2224, 2231, 2235
GUINEABISSAU
Bissau Radio
J5M
413, 426, 802, 813, 1203,
1615, 1635
HONG
KONG
Cap D'Aguilar Radio
(Hong Kong Radio)
ICELAND
Hornafjoerdur Radio
Reykjavik Radio
TFT
TFA
Siglufjoerdur Radio
TFX
406, 414, 416, 419
406, 414, 416, 419, 601,
603, 805, 807, 809, 831,
1206, 1208, 1215, 1220,
1606, 1615, 1625, 1630,
2225, 2226
406, 414, 416, 419
Amboina Radio
Banjarmasin Radio
Belawan Radio
Bitung Radio
Dumia Radio
Jakarta Radio
Kupang Radio
Makassar Radio
Palembang Radio
Sabang Radio
Semarang Radio
Sorong Radio
Surabaya Radio
Telukbayur Radio
PKE
PKG
PKB
PKM
PKP
PKI
PKK
PKF
PKC
PKA
PKR
PKY
PKD
PKP
408, 826, 1210
411, 602, 816
810, 1205
418, 830, 1209
401, 816, 1209
812, 1210, 1610, 2234
604
414, 828, 1201
414, 830
411, 826
422, 604, 828
422, 601, 828
408, 826, 1212
605
Abadan Radio
Abbas Radio
EQA
EQI
407, 604, 1605
416, 604, 805, 1616,
2235
INDONESIA
IRAN
page 78
411, 417, 606
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
IRAN
(Cont'd)
Station Name
Call
I.T.U. Channel #
Bushire Radio
EQM
Khark Radio
Khoramshahr Radio
EQQ
EQK
Lavan Radio
Nowshahr Radio
Shahpoor Radio
EQR
EQO
EQN
ISRAEL
Haifa Radio
4XO
404, 410, 418, 423, 603,
604, 801, 805, 812, 821,
827, 1204, 1207, 1213,
1215, 1221, 1609, 1613,
1617, 1628, 2204, 2207,
2217
ITALY
Genova P.T. Radio
ICB
Roma P.T. Radio
IAR
408, 409, 806, 823, 1205,
1211, 1608, 1614, 2216
402, 412, 420, 423, 602,
604, 814, 819, 820, 826,
831, 1206, 1209, 1213,
1218, 1230, 1603, 1606,
1616, 1624, 2202, 2211,
2223, 2237
Abidjan Reche Radio
Abidjan Radio
TUA
404, 602, 806, 1212
419, 603, 822, 1205,
1634, 2225
Kingston Jamaica Radio
6YI
405, 416, 605, 812, 1224
JAPAN
Tokyo Radio
JBO
407, 425, 426, 810, 812,
820, 1207, 1212, 1218,
1604, 1609, 1632, 2227,
2236, 2240
KENYA
Mombasa Radio
5ZF
414, 822
IVORY
COAST
JAMAICA
405, 604, 810, 1629,
2203
410, 604, 1220
408, 604, 824, 1625,
2205
420, 604
411, 604, 817
402, 604, 829, 1231,
2233
page 79
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
KIRIBATI
(Republic of)
KOREA
LEBANON
MADAGASCAR
MADEIRA
MARTINIQUE
Station Name
Call
I.T.U. Channel #
Tarawa Radio
T3T
411, 814
Seoul Radio
HLS
401, 419, 602, 605, 803,
827, 1213, 1229, 1634,
1637, 2209, 2222
Beyrouth Radio
ODR
426, 828, 1216
Antalaha Radio
Diego-Suarez Radio
Fort-Dauphin Radio
Maintirano Radio
Majunga Radio
Manakara-Sud Radio
Manajary Radio
Morondava Radio
Nossi-Be Radio
Tamatave Radio
5RL
5RD
5RO
5RN
5RS
402
415
406
415
415
402
415
406
406
406, 604, 605, 807, 831,
1206, 1225, 1637, 2240
Madeira Radio
CUB
413, 426, 802, 813, 1203,
1207, 1615, 1632, 2207,
2222
Fort de France Radio
FFP
404, 424, 825, 828
Acapulco,
Guerrero Radio
XFA
Chetumai,
Quintana Roo Radio
XFP
Ciudad del Carmen
Campeche Radio
XFD
403, 408, 421, 603, 604,
606, 809, 821, 826, 1209,
1221, 1222, 1604, 1614,
1621, 2221, 2225, 2234
404, 401, 421, 601, 604,
606, 817, 821, 829, 1209,
1221, 1222, 1604, 1614,
1621, 2221, 2225, 2238
404, 413, 421, 606, 809,
821, 826, 1209, 1221,
1222, 1604, 1614, 1621,
2221, 2225, 2234
(French Dept. of)
MEXICO
page 80
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
MEXICO
(Cont'd)
Station Name
Call
I.T.U. Channel #
Coatzacoalcos,
Veracruz Radio
XFF
Cozumel,
Quintana Roo Radio
XFC
Ensendada,
Baja California Radio
XFE
Guaymas, Sonora Radio
XFY
La Pax, Baja California
Radio
XFK
Manzanillo,
Comima Radio
XFM
Mazatlan,
Sinaloa Radio
XFL
Progreso,
Yucatan Radio
XFN
Salina Cruz,
Oaxaca Radio
XFQ
404, 413, 421, 603, 604,
606, 817, 821, 829, 1221,
1222, 1225, 1604, 1614,
1621, 2221, 2234, 2238
403, 408, 421, 603, 604,
606, 809, 821, 826, 1209,
1221, 1225, 1604, 1614,
1621, 2221, 2225, 2234
403, 413, 421, 603, 604,
606, 809, 821, 826, 1209,
1221, 1222, 1604, 1614,
1621, 2221, 2225, 2234
404, 413, 421, 606, 817,
821, 829, 1209, 1221,
1225, 1604, 1614, 1621,
2221, 2225, 2238
404, 413, 421, 603, 604,
606, 817, 821, 829, 1221,
1222, 1225, 1604, 1621,
2221, 2234, 2238
404, 413, 421, 601, 603,
606, 817, 821, 829, 1209,
1221, 1222, 1604, 1614,
1621, 2221, 2225, 2234
403, 408, 601, 604, 606,
809, 821, 826, 1209,
1221, 1225, 1604, 1621,
2221, 2225, 2238
404, 413, 421, 601, 603,
606, 817, 821, 829, 1221,
1222, 1225, 1614, 1617,
1621, 2221, 2234, 2238
404, 413, 421, 601, 604,
606, 817, 821, 829, 1221,
1222, 1225, 1604, 1621,
2221, 2234, 2238
page 81
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Call
I.T.U. Channel #
Tampico,
Tamaulipas Radio
XFS
Veracruz,
Veracruz Radio
XFU
404, 413, 421, 601, 604,
606, 817, 821, 829, 1221,
1222, 1225, 1604, 1614,
1621, 2221, 2225, 2238
404, 413, 421, 601, 604,
606, 817, 821, 829, 1209,
1221, 1222, 1604, 1621,
2221, 2234, 2238
Monaco Radio
3AC
403, 413, 421, 602, 804,
809, 821, 1221, 1224,
1607, 1621, 2219, 2221
Casablanca Radio
CNP
828, 1223, 1638
Nauru Radio
C2N
817
NETHERLANDS
ANTILES
Curacao Radio
PJC
408, 803, 1207, 1607
NETHERLANDS
Scheveningen Radio
PCG
405, 407, 410, 419, 421,
602, 606, 805, 806, 821,
826, 1207, 1213, 1219,
1221, 1621, 1621, 1623,
1636, 1639, 2205, 2221,
2232
Noumea Radio
RJP
404, 805, 1205
NEW
ZEALAND
Awarua Radio
Wellington Radio
ZLB
ZLW
421
408, 421, 601, 807, 1209,
1606, 2213
NORWAY
Rogaland Radio
LGN
401, 403, 407, 409, 415,
418, 420, 421, 424, 425,
426, 603, 605, 606
MEXICO
(Cont'd)
MONACO
MOROCCO
NAURU
NEW
CALEDONIA
&
Dependencies
page 82
Station Name
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Station Name
NORWAY
(Cont'd)
Call
I.T.U. Channel #
LFL
801, 803, 808, 809, 810,
811, 813, 818, 821, 823,
825, 827, 828, 829, 1203,
1204, 1205, 1210, 1211,
1213, 1214, 1217, 1218,
1219, 1221, 1222, 1223,
1225, 1226, 1228, 1231
1601, 1603, 1604, 1605,
1607, 1608, 1610, 1613,
1614, 1617, 1618, 1619,
1620, 1621, 1622, 1627,
1629, 1635, 1641, 2202,
2203, 2208, 2211, 2213,
2215, 2216, 2218, 2221,
2228, 2230, 2233, 2234,
2236, 2237, 2239, 2240
LFN
PAPUA NEW
GUINEA
Port Moresby Radio
Rabaul Radio
P2M
P2R
409, 417, 604, 805
409, 417, 604, 805, 1225
PHILIPPINES
Bacoor Radio
DZI
Bulacan Radio
DZJ
Bulacan Radio
DZO
Cebu Radio
Iloilo Radio
Manila Radio
DYP
DYV
DZZ
409, 605, 817, 1220,
1605
418, 603, 814, 1201, 1605
409, 605, 820, 1220,
1605, 825
825
412, 820
418, 603, 808, 1201,
1605
Gdynia Radio
SPF
POLAND
SPD
SPC
Szczecin Radio
SPG
SPR
SPO
402, 804, 1209, 1633,
2206
406, 824, 1229, 1631,
2232
423, 602, 812, 1216,
1607, 2215
806, 1231, 2209
404, 830, 1227, 1638
408, 604, 810, 1220,
1625, 2219
page 83
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Station Name
Call
I.T.U. Channel #
FRENCH
POLYNESIA
Mahina Radio
FJA
416, 829, 1605
PORTUGAL
Lisboa Radio
CUL
413, 602, 802, 1203,
1615, 1632, 2207, 2222
POLAND
Gdynia Radio
SPF
402, 804, 1209, 1633,
2206
406, 824, 1229, 1631,
2232
423, 602, 812, 1216,
1607, 2215
806, 1231, 2209
404, 830, 1227, 1638
408, 604, 810, 1220,
1625, 2219
SPD
SPC
PUERTO RICO
REUNION
Szczecin Radio
SPG
SPR
SPO
Q.P.P.A. Radio
A7S
423, 804, 1229, 1626,
2235
S. Denis Reunion
FFD
404, 418, 819, 824
Pago Pago Radio
KUQ
408, 806, 1232, 1638
Apia Radio
5WA
603, 820, 1213, 1624,
2219
Dammam Radio
HZG
406, 409, 421, 601, 603,
606, 808, 811, 821, 1202,
1221, 1223, 1602, 1609,
1621, 2221, 2222, 2231
Dakar Radio
6VA
404, 803, 1212, 1629,
2220
Seychelles Radio
S7Q
410, 818, 1215, 1601
S. Helena Radio
ZHH
414, 807, 1217
(French Dept. of)
SAMOA
(American)
SAMOA
(Western)
SAUDI
ARABIA
SENEGAL
SEYCHELLES
(Republic of)
S. HELENA
page 84
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
SINGAPORE
Station Name
Call
I.T.U. Channel #
Singapore Radio
9VG
405, 407, 602, 606, 804,
815, 821, 824, 1216,
1219, 1221, 1613, 1621,
1641, 2212, 2221
Honiara Radio
VQJ
830
Cape Town Radio
ZSC
Durban Radio
ZSD
405, 421, 821, 1209,
1608, 2204
407, 421, 602, 808, 821,
1221, 1224, 1633, 2206
Pozuelo del Rey Radio
EHY
406, 407, 409, 411, 416,
601, 604, 803, 804, 810,
816, 818, 1201, 1208,
1210, 1225, 1227, 1620,
1630, 1634, 1637, 1639,
2201, 2224, 2226, 2229,
2234
Goteborg Radio
SAG,
SAB
Harnosand Radio
SAH
401, 403, 409, 418, 420,
424, 603, 605, 801, 803,
808, 811, 818, 825, 827,
829, 1203, 1210, 1211,
1214, 1215, 1217, 1219,
1223, 1226, 1601, 1603,
1605, 1608, 1614, 1617,
1618, 1622, 1635, 1641,
2203, 2208, 2211, 2213,
2218, 2228, 2230, 2234
401, 420, 424
SWITZERLAND
Bern Radio
HEB
408, 424, 822, 824, 831,
1202, 1227, 1230, 1611,
1615, 1631, 2214, 2220,
2232
TOGO
Lome Radio
5VA
403
SOLOMON
ISLANDS
SOUTH
AFRICA
SPAIN
SWEDEN
page 85
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
TURKEY
TUVALU
UNITED
KINGDOM
Station Name
Call
I.T.U. Channel #
Antalya Radio
Canakkale Radio
Iskenderun Radio
Istanbul Radio
TAM
TAM
TAM
TAN
Izmir Radio
Mersin Radio
TAN
TAM
Samsun Radio
Trabzon Radio
Zonguldak Radio
TAN
TAO
TAN
409, 1620
407, 810, 1226
420
417, 811, 831, 1218,
1608, 2230
401, 602, 1618
803, 1206, 1216, 1611,
2213, 2214
420, 1606
401, 602
411, 1222
Funafuti Island Radio
Portishead Radio
814, 1207, 1608
GKT
GKV
GKU
GKW
RUSSIA
Arkhangelsk Radio
Astrakhan Radio
Baku Radio
Jdanov, Donetskoi Radio
Kholmsk Radio
Klaipeda Radio
Leningrad Radio
Moskva Radio
Murmansk Radio
Nakhodka,
Primorskogo Radio
Novorossiisk,
Krasnodarskogo Radio
page 86
402, 406, 410, 802, 1201,
1202, 1206, 1602, 1606,
2206
426, 822, 826, 1224,
1228, 1230, 1623, 2227,
2229
816, 819, 1611, 1615,
1618, 2212, 2220
831, 1232, 1632, 1637,
1640
401, 823, 1209, 1626
405, 804
405, 807
413, 1641
1626, 2213
405, 1205, 1601
414, 807, 1204, 1605,
2213
1201, 1606, 2207
402, 824
1613
405, 815, 1209, 1601,
2231
MARITIME RADIOTELEPHONE
PUBLIC CORRESPONDENCE STATIONS
Country
Station Name
RUSSIA
(Cont'd)
Odessa Radio
Riga Radio
Vladivostok Radio
UNITED
STATES
Mobile, Alambama Radio
Point Reyes, California
Radio
Ft. Lauderdale, Florida
Radio
Manahawkin, New Jersey
Radio
Rijeka Radio
Call
I.T.U. Channel #
1205, 1623, 2202, 2218
401, 1205, 1630
401, 603, 805, 1201,
1607, 2202
WLO
405, 414, 419, 607,
824, 829, 830, 1212,
1225, 1226, 1607, 1632,
KMI* 1641, 2227, 2231, 2237
401, 416, 417, 804, 809,
822, 1201, 1202, 1203,
1229, 1602, 1603, 1624,
WOM* 2214, 2223, 2228, 2236
403, 412, 417, 423, 802,
805, 810, 814, 825, 831,
1206, 1208, 1209, 1215,
1223, 1230, 1601, 1609,
1610, 1611, 1616, 2215,
WOO* 2216, 2222
410, 411, 416, 422, 808,
811, 815, 826, 1203,
1210, 1211, 1228, 1605,
1620, 1626, 1631, 2201,
2205, 2210, 2236
YUR
408, 419, 602, 605, 810,
830, 1224, 1229, 1611,
1627, 2204, 2206, 2239
* Limited services after 2/28/2000
page 87
INTERNATIONAL VOICE
CHANNEL DESIGNATORS (4-16 MHZ)
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
450
451
452
453
601
602
603
604
605
606
650
651
652
653
654
801
802
803
804
805
806
4065
4068
4071
4074
4077
4080
4083
4086
4089
4092
4095
4098
4101
4104
4107
4110
4113
4116
4119
4122
4125
4128
4131
4134
4137
4140
4143
4125
4146
4149
4417
6200
6203
6206
6209
3212
6215
6215
6224
6227
6230
6516
8195
8198
8201
8204
8207
8210
4357
4360
4363
4366
4369
4372
4375
4378
4381
4384
4387
4390
4393
4396
4399
4402
4405
4408
4411
4414
4417
4420
4423
4426
4429
4432
4435
Safety
Simplex
Simplex
Simplex
6501
6504
6507
6510
6513
6516
Safety
Simplex
Simplex
Simplex
Simplex
8719
8722
8725
8728
8731
8734
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
850
851
852
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
8228
8231
8234
8237
8240
8243
8246
8249
8252
8255
8258
8261
8264
8267
8270
8273
8276
8279
8282
8285
8288
8291
8294
8297
12230
12233
12236
12239
12242
12245
12248
12251
12254
12257
12260
12263
12266
12269
12272
12275
12278
12281
12284
12287
12290
12293
12296
12299
8752
8755
8758
8761
8765
8767
8770
8773
8776
8779
8782
8785
8788
8791
8794
8797
8800
8803
8806
8809
8812
Safety
Simplex
Simplex
13077
13080
13083
13086
13089
13092
13095
13098
13101
13104
13107
13110
13113
13116
13119
13122
13125
13128
13131
13134
13137
13140
13143
13146
1230
1231
1232
1250
1251
1252
1253
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
12317
12320
12323
12290
12353
12356
12359
16360
16363
16366
16369
16372
16375
16378
16381
16384
16387
16390
16393
16396
16399
16402
16405
16408
16411
16414
16417
16420
16423
16426
16429
16432
16435
16436
16441
16444
16447
16450
16453
16456
16459
16462
16465
16468
16471
16474
16477
16480
13164
13167
13170
Safety
Simplex
Simplex
Simplex
17242
17245
17248
17251
17254
17257
17260
17263
17266
17269
17272
17275
17278
17281
17284
17287
17290
17293
17296
17299
17302
17305
17308
17311
17314
17317
17320
17323
17326
17329
17332
17335
17338
17341
17344
17347
17350
17353
17356
17359
17362
page 88
INTERNATIONAL VOICE
CHANNEL DESIGNATORS (4-16 MHZ)
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
807
808
809
810
811
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
2201
2202
2203
2204
2205
2206
2207
2208
8213
8216
8219
8222
8225
19755
19758
19761
19764
19767
19770
19773
19776
19779
19782
19785
19788
19791
19794
19797
22000
22003
22006
22009
22012
22015
22018
22021
9737
8740
8743
8746
8749
18780
18783
18786
18789
18792
18795
18798
18801
18804
18807
18810
18813
18816
18319
18822
22696
22699
22702
22705
22708
22711
22714
22717
1225
1226
1227
1228
1229
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
12302
12305
12308
12311
12314
22024
22027
22030
22033
22036
22039
22042
22045
22048
22051
22054
22057
22060
22063
22066
22069
22072
22075
22078
22081
22084
22087
22090
13149
13152
13155
13158
13161
22720
22723
22726
22729
22732
22735
22738
22741
22744
22747
22750
22753
22756
22759
22762
22765
22768
22771
22774
22777
22780
22793
22786
Channel
No.
Coast
Tranmit
(kHz)
Ship
Transmit
(kHz)
1650
1651
1652
16520
16528
16531
Safety
Simplex
Simplex
2232
2233
2234
2235
2236
2237
2238
2239
2240
2251
2252
2253
2254
2255
2501
2502
2503
2504
2505
2506
2507
2508
22093
22096
22099
22102
22105
22108
22111
22114
22117
22159
22162
22165
22168
22171
26145
26148
26151
26154
26157
26160
26163
26166
22789
22792
22795
22798
22801
22804
22807
22810
22813
Simplex
Simplex
Simplex
Simplex
Simplex
25070
25073
25076
25079
25082
25085
25088
25091
page 89
SSB MARINE CHANNELS
Ship-to-ship and ship-to-coast shore station SSB marine channels, along
with their channel designators. Safety channels are identified with a designator "S".
Regualr ship-to-ship channels are designated "A" through "E".
Frequency
Chnl Designator
Application
SAFETY ONLY
2182
4125
6215
8291
12,290
16,420
4S
6S
8S
12S
16S
Marine, international distress & calling
Coast Gaurd short-range
short-range safety
short-range safety
medium-range safety
long-range safety
very long-range safety
SHORT-RANGE SHIP-TO-SHIP CHANNELS
2065
2079
2096.5
3023
4146
4149
4417
6224
6227
6230
8294
8297
12,353
12,356
12,359
4A
4B
4C
6A
6B
6C
8A
8B
12A
12B
12C
nights, short-range
nights, short-range
nights, short-range
search and rescue
short-range
short-range
daytime short-range
medium-range
medium-range
medium-range
long-range
long-range
long-range
long-range
long-range
VERY LONG-RANGE SHIP-TO-SHIP CHANNELS
16,528
16,531
16,534
18,840
18,843
22,159
22,162
22,165
22,168
page 90
16A
16B
16C
18A
18B
22A
22B
22C
22D
very long-range days
long-range
very long-range
quiet channel, long-range
quiet channel, very long-range
extremely long-range
extremely long-range
extremely long-range
extremely long-range
WEATHER FAX
Country
Call Signs
Frequencies
Times
CAIRO, EGYPT
SUU29
SUU33
SUU45
11015 kHz
15664 kHz
17635 kHz
1900-0700
#
0700-1900
NAIROBI, KENYA
5YE1
5YE2
5YE8
5YE6
5YE3
5YE7
9043 kHz
12315 kHz
15525 kHz
16315 kHz
17365 kHz
15525 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
SAINT DENIS/
CHAUDRON,REUNION
FZR81
FZS63
8176 kHz
16335 kHz
24 hrs.
24 hrs.
DAKAR, SENEGAL
6VU73
6VU79
13667.5 kHz
19750 kHz
Continuous
Continuous
PRETORIA,
SOUTH AFRICA
ZRO5
ZRO2
ZRO3
ZRO4
4014 kHz
7508 kHz
13538 kHz
18238 kHz
1530-0400
Continuous
Continuous
Continuous
ASIA
BEIGING (PEKING),
CHINA
BAF6
BAF36
BAF4
BAF8
BAF9
BAF33
5525 kHz
8120 kHz
10115 kHz
14365 kHz
16025 kHz
18235 kHz
SHANGHAI, CHINA
BDF
3241 kHz
5100 kHz
7420 kHz
11420 kHz
18940 kHz
NEW DELHI, INDIA
ATA55
ATP57
ATV65
ATU38
4993.5 kHz
7403 kHz
14842 kHz
18227 kHz
1430-0230
Continuous
Continuous
0230-1430
page 91
WEATHER FAX
Country
Call Signs
Frequencies
Times
TOKYO 1, JAPAN
JMH
JMH2
JMH3
JMH4
JMH5
JMH6
3622.5 kHz
7305 kHz
9970 kHz
13597 kHz
18220 kHz
23522.9 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
TOKYO 2, JAPAN
JMJ
JMJ2
JMJ3
JMJ4
JMJ5
3365 kHz
5405 kHz
9438 kHz
14692.5 kHz
18441.2 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
TAIPEI,
REPUBLIC OF CHINA
BMF
4616 kHz
5250 kHz
8140 kHz
13900 kHz
SEOUL,
REPUBLIC OF KOREA
HLL8
5857.5 kHz
BANGKOK,
THAILAND
HSW64
HSW61
7395 kHz
17520 kHz
KHABAROVSK,
RUSSIA
RXB72
RXB75
RXO70
RXO72
RXO74
4516.7 kHz
7475 kHz
9230 kHz
14737 kHz
19275 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
NOVOSIBIRSK 1,
RUSSIA
ROF73
RYO79
RTB26
RYO76
4445 kHz
5765 kHz
9220 kHz
12320 kHz
Continuous
Continuous
Continuous
Continuous
RCU73
RCU79
3675 kHz
4475 kHz
9060 kHz
12230 kHz
Continuous
1425-0245
Continuous
0350-1325
NOVOSIBIRSK 2,
RUSSIA
TIKSI BUKHTA,
RUSSIA
page 92
227 kHz
Continuous
WEATHER FAX
Country
Call Signs
Frequencies
Times
TOKYO 1, JAPAN
JMH
JMH2
JMH3
JMH4
JMH5
JMH6
3622.5 kHz
7305 kHz
9970 kHz
13597 kHz
18220 kHz
23522.9 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
TASHKENT 1,
UZBEKISTAN
RBV70
RPJ78
RBV78
RBX72
RCH72
RBV76
3690 kHz
4365 kHz
5890 kHz
7570 kHz
9340 kHz
14982.5 kHz
1300-0130
Continuous
Continuous
0130-1300
Continuous
Continuous
TASHKENT 2,
UZBEKISTAN
RBX70
3280 kHz
5090 kHz
5285 kHz
9150 kHz
Continuous
Continuous
Continuous
Continuous
RBX71
RCH73
SOUTH AMERICA
BEUNOS AIRES,
ARGENTINA
LRO69
LRB72
LRO84
5185 kHz
10720 kHz
18053 kHz
Continuous
Continuous
Continuous
OLINDA/
RIO DE JANEIRO,
BRAZIL
PPO
PWZ-33
PWZ-33
8294 kHz
12660 kHz
17140 kHz
0745/1745
0745/1745
0745/1745
SANTIAGO, CHILE
CCS
4766 kHz
6418 kHz
8594 kHz
13525 kHz
22071 kHz
Continuous
Night
Continuous
Day
Continuous
NORTH AMERICA
ESQUIMALT, BRITISH
COLUMBIA, CANADA
CKN
2752.1 kHz
4266.1 kHz
6454.1 kHz
12751.1 kHz
Continuous
Continuous
Continuous
Continuous
page 93
WEATHER FAX
Country
Call Signs
Frequencies
Times
HALIFAX, NOVA
SCOTIA, CANADA
CFN
122.5 kHz
4271 kHz
6496.4 kHz
10536 kHz
13510 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
IQALUIT, N.W.T.,
CANADA
VFF
VFF
3251.1 kHz
7708.1 kHz
1 July - 15 Oct.
1 July - 15 Oct.
RESOLUTE, N.W.T.,
CANADA
VFR
VFR
3251.1 kHz
7708.1 kHz
1 July - 15 Oct.
1 July - 15 Oct.
NEW ORLEANS,
LOUISIANA
NMG
8503.9 kHz
4317.9 kHz
Various
Various
ELENDORF AFB,
ALASKA, U.S.A.
2280 kHz
3394 kHz
5095 kHz
7398 kHz
10665 kHz
15805 kHz
19332 kHz
1200-2400
0000-1200
1200-2400
0000-1200
KODIAK, ALASKA,
U.S.A.
NOJ
4298 kHz
8459 kHz
POINT REYES,
CALIFORNIA, U.S.A.
NMC
4346 kHz
8682 kHz
12730 kHz
17151.2 kHz
22528 kHz
BOSTON,
MASSACHUSETTS,
USA
NIK
6340.5 kHz
12750 kHz
1600 & 1840
1600 & 1840
MARSHFIELD,
MASSACHUSETTS,
USA
NMF
6340.5 kHz
12750 kHz
1600 & 1840
1600 & 1840
ROGERS CITY,
MICHIGAN, U.S.A.
WLC
2195.5 kHz
5898.6 kHz
0130-0430(2)
1030-2230(2)
page 94
WEATHER FAX
Country
Call Signs
OFFUTT
AFB/ELKHORN,
NEBRASKA, U.S.A.
Frequencies
3231 kHz
5096 kHz
6904 kHz
10576 kHz
11120 kHz
15681 kHz
19325 kHz
NORFOLK, VIRGINIA,
U.S.A.
NAM
NAM
NAM
NAM
NAM
3357 kHz
3820.5 kHz
8080 kHz
9318 kHz
9108.1 kHz
12748.1 kHz
10865 kHz
15959 kHz
18486 kHz
20015 kHz
Times
0000-1200
0000-1200
1200-2400
1200-2400
0000-1200
On Call
On Call
Continuous
1200-0000
On Call
On Call
On Call
PACIFIC OCEAN BASIN
DARWIN, AUSTRALIA
AXI32
AXI33
AXI34
AXI35
AXI37
5755 kHz
7535 kHz
10555 kHz
15615 kHz
18060 kHz
1110-2300
1110-2300
0000-2359
2300-1110
2300-1110
MELBOURNE,
AUSTRALIA
AXM31
AXM32
AXM34
AXM35
AXM37
2628 kHz
5100 kHz
11030 kHz
13920 kHz
20469 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
WELLINGTON, NEW
ZEALAND
ZKLF
5807 kHz
9459 kHz
13550 kHz
16340.1 kHz
Continuous
Continuous
Continuous
Continuous
page 95
WEATHER FAX
Country
Call Signs
Frequencies
Times
QUAM 1, M.I.
NPN
49657 kHz
[email protected]
LSB
0000-2359*
LSB/USB
[email protected]
USB
0000-2359*
LSB
0000-2359*
LSB/USB
[email protected]
LSB
10255 kHz
12777 kHz
16029.6 kHz
19860 kHz
22324.5 kHz
@ Japan freq.
* Guam freq.
QUAM 2, M.I.
NPN
5260 kHz
NKM
7580 kHz
NKM
12804 kHz
NKM
20300 kHz
NPN
23010 kHz
0000-2359*
USB
1400-0159$
USB
0000-2359$
USB
0200-1359$
USB
0000-2359*
LSB
$ Diego Garcia freq.
* Guam freq.
QUAM 3/
ANDERSON AFB, M.I.
HONOLULU,
HAWAII, U.S.A.
page 96
4943 kHz
6919 kHz
7708.5 kHz
13385 kHz
14397 kHz
17526 kHz
20380 kHz
KVM70
9982.5 kHz
11090 kHz
16135 kHz
23331.5 kHz
Continuous
Continuous
Continuous
Continuous
WEATHER FAX
Country
Call Signs
Frequencies
Times
PEARL HARBOR,
HAWAII, U.S.A.
NPM
4855 kHz
0600-1600*
LSB/ISB
Continuous&
USB/ISB
Continuous#
LSB
Continuous&
USB/ISB
1600-0600*
LSB/ISB
6453 kHz
8494 kHz
9090 kHz
21735 kHz
* Pearl Harbor freq.
# ADAK, AK freq.
& Stockton, CA
freq.
EUROPE
PRAGUE, CZECH
REPUBLIC
OLT21
111.8 kHz
Continuous
SKAMLEBAEK,
DENMARK
OXT(1)
5850 kHz
9360 kHz
0030-1005
0005-0025
1010-1215
1245-1305
1830-1850
13855 kHz
17510 kHz
1220-1240
1310-1330
1805-1825
1335-1355
HELSINKI, FINLAND
OGH
OGH
OFB28
2803 kHz
2811.7 kHz
8018 kHz
0840
0840
0840
MARIEHAMM,
FINLAND
OFH
1877.7 kHz
0840, 0990,
1300
HAMBURG/
PINNEBERG,
GERMANY
DDH3
DDK3
DDK6
3855 kHz
7880 kHz
13882.5 kHz
0600-2300
Continuous
Continuous
page 97
WEATHER FAX
Country
Call Signs
Frequencies
Times
OFFENBACH/
MAIN-MAINFLINGEN 1,
GERMANY
DCF54
134.2 kHz
Continuous
OFFENBACH/
MAIN-MAINFLINGEN 2,
GERMANY
DCF37
117.4 kHz
Continuous
ATHENS, GREECE
SVJ4
8530 kHz
ROME, ITALY
IMB51
IMB55
IMB56
4777.5 kHz
8146.6 kHz
13597.4 kHz
ECA7
3650 kHz
6918.5 kHz
10250 kHz
MADRID, SPAIN
Continuous
Continuous
Continuous
ROTO, SPAIN
AOK
4623 kHz
5856.4 kHz
9382.5 kHz
11485 kHz
1800-0600
Continuous
Continuous
0600-1800
ANKARA, TURKEY
YMA20
YMA20
3377 kHz
6790 kHz
1610-0500
0500-1610
MOSCOW, RUSSIA
RVO76
RCI72
RND77
RAW78
RKA73
RDD79
RBI77
RIZ59
2815 kHz
3875 kHz
5355 kHz
7750 kHz
10710 kHz
10980 kHz
15950 kHz
18710 kHz
1530-0510
1710-0510
Continuous
Continuous
Continuous
Continuous
1510-1710
Unknown
MOSCOW 2, RUSSIA
RTO
RVO73
RAN77
RCC76
RKA78
RWZ77
RKU71
53.6 kHz
5150 kHz
6880 kHz
7670 kHz
10230 kHz
11525 kHz
13470 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
0230-1805
Continuous
page 98
WEATHER FAX
Country
Call Signs
Frequencies
MOSCOW 3, RUSSIA
RGC
RKB78
144.5 kHz
12165 kHz
MOSCOW 4, RUSSIA
RWW79
4550 kHz
MURMANSK, RUSSIA
RBW48
10130 kHz
0600-1900
7480 kHz
13780 kHz
1900-2200
1900-2200
2618.5 kHz
4610 kHz
8040 kHz
14436 kHz
18261 kHz
1800-0600
Continuous
Continuous
Continuous
0600-1800
ST. PETERSBURG,
RUSSIA
BRACKNELL,
UNITED KINGDOM
CROUGHTON,
UNITED KINGDOM
GFA
GFA
GFA
GFA
GFA
Times
4755 kHz
5235 kHz
5932 kHz
6827 kHz
6937 kHz
7596 kHz
7623 kHz
7930 kHz
9100 kHz
10385 kHz
10873 kHz
13537 kHz
13585 kHz
14397 kHz
14677 kHz
17526 kHz
20051 kHz
20095 kHz
23155 kHz
23195 kHz
25245 kHz
25480 kHz
page 99
WEATHER FAX
Country
Call Signs
Frequencies
Times
NORTHWOOD,
UNITED KINGDOM
GYA
GYA
GYA
GYA
GYA
GYA
GYA
2374 kHz
3652 kHz
4307 kHz
6446 kHz
8331.5 kHz
12844.56 kHz
16912 kHz
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
ANTARCTICA
CASEY, ANTARCTICA
page 100
VLM
VLM
7468.1 kHz
11453.1 kHz
1200-0300
0300-1200
http://www.icomamerica.com/downloads/flash/ic-756pro_flash_readme.txt
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All information contained in this presentation is current as of 1/1/01. Thank you for using ICOM
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©2001, ICOM America, Inc. The ICOM logo is a registered trademark of ICOM, Inc.
http://www.icomamerica.com/downloads/flash/ic-756pro_flash_readme.txt [9/6/2004 6:13:40 PM]
TECHNICAL REPORT
CONTENTS
11. Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
12. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
13. Front and rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3-1 Front panel
3-2 Rear panel
14. What is DSP in radio Communication? . . . . . . . . . . . . . . . . 10
15. Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5-1 Digital IF filter
5-2 Digital functions
5-3 PSN modulation
5-4 Manual notch
5-5 Speech compressor
5-6 Microphone equalizer
5-7 RTTY demodulator
5-8 Receiver
5-9 Transmitter
5-10 Dual-watch function
5-11 Real-time spectrum scope
5-12 Voice record/playback function
5-13 PLL circuit
2
16. Connection to option/peripheral units . . . . . . . . . . . . . . . . . 25
6-1 ACC Sockets
6-2 HF/50MHz, 1kW linear amplifier
6-3 Interface for digital mode
6-4 External control unit for voice memory keyer
6-5 Installation of UT-102 optional Voice Synthesizer Unit
17. CI-V control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7-1 Remote jack
7-2 Data format of CI-V
7-3 List of commands
18. Inside Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
19. Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10-1 General
10-2 Transmitter
10-3 Receiver
10-4 Antenna tuner
11. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . foldout
The IC-756PROII is the high performance HF transceiver of choice for today’s discriminating amateur
radio operator. Icom’s engineers took cutting-edge digital technology and paired it with Icom’s
extensive experience with analog technology. The result is a major advancement of Icom’s original
digital IF filter which, in the earlier IC-756PRO model, enjoyed a great reputation around the world.
The IC-756PROII uses the same 32-bit floating point DSP and a 24-bit A/D-D/A converter as the IC756PRO. It is now possible to execute the digital IF filter, noise reduction and the digital IF filter in the
AGC loop processing, and to select the soft/sharp filter shapes. The IC-756PROII employs exclusive
DSP/analog circuit matching to further improve receiver performance.
Icom’s engineers analyzed the influence of the AGC loop upon the received audio, matching it to an
analog circuit suitable for the dynamic range of the A/D converter and the other parts used, and also
re-examined the core stage of the receiver (ranging from RF top to mixer circuit), to distribute the
mixer levels properly. As a result, the matching of digital and analog technology has attained a level
never before achieved.
This technical report does not explain in depth all the digital engineering with its many calculations and
formulas. Instead, it focuses on the DSP engineering in an easy-to-understand manner. This report
also explains why the 32-bit floating point DSP and 24-bit A/D-D/A converter are included. The
dynamic range of the 32-bit floating point DSP and the 24-bit A/D-D/A converter may seem to be an
over specification for amateur radio. But this is not the case. This technical report helps clarify these
points.
It is Icom’s hope that in providing you with this report you will discover the IC-756PROII’s many digital
advantages. Enjoy!
3
2. Features
32-bit floating point DSP and 24-bit A/D-D/A
converter
The adoption of a 32-bit floating point DSP and 24-bit A/D-D/A
converter in the IF stage (36kHz) was originally developed by
Icom. It enables various digital functions which amateur radio
operator’s desire.
■ 51 types of digital IF filtering
The digital IF filter has superior filtering performance and a
distinguished shaping factor that demonstrates the power of 32-bit
floating point DSP. The digital filter is completely free from
deterioration due to deviations in band characteristics, temperature
change, or mechanical vibration, all of which have been observed in
analog filters. It also provides excellent ripple characteristics that
have never been available with analog filters. The passband
(50Hz–3.6kHz) of the digital IF filters used for IC-756PROII come in
51 types. This function allows 3 of these 51 types to be pre-set for
each mode and to be changed instantaneously by using the filter
button, depending on the situation.
■ 2 types of filter shape (Sharp/Soft)
Changing the IF filter shape is a feature that is not available with
analog radios. Select the filter shape from two types, Sharp and Soft,
depending on the purpose, operating band, band conditions, etc. It is
possible to set CW and SSB filter characteristics independently and
also select the filter shape while actually receiving a signal.
■ Digital IF filter in AGC loop
The digital IF filter, manual notch filter, etc. are located in the AGC
loop, using DSP, which completely eliminates interference from
adjacent strong signals. This allows the AGC to be operated only on
the selected frequency. It is also possible to pre-set the operation of
AGC in each mode in accordance with 13 types of time constants.
455
kHz
36
kHz
■ Demodulator/decoder for RTTY
This transceiver is equipped with a demodulator and a decoder for
BAUDOT RTTY as a standard feature. On-air station calls may be
recognized instantaneously by reading the received RTTY message
directly on the IC-756PROII’s LCD – no personal computer or
external components are required. The transceiver is fitted with an
on-screen tuning indicator that allows the RTTY to be fine tuned with
ease. A DSP based twin-peak audio
filter further improves the S/N ratio.
This filter will reduce interference that
appears between each tone (mark
and space), which cannot be removed
by conventional analog filters. This
twin-peak audio filter works to capture
noise-level signals accurately and to
significantly reduce the generation of
RTTY reception screen
noise distortion.
■ New-generation speech compressor
The DSP based speech compressor enhances the readability of your
transmitted signal at a receiving station without any distortion, even
when the compression is set to a high level. The gradation of voice
processing is extremely close to the original sound. This assures
superior sound quality at all compression levels.
Speech compressor on
ADC
DET
Manual
NOTCH
3Lo
AGC
■ Manual notch with superior attenuation level
The IC-756PROII’s manual notch filter has extremely sharp
characteristics for processing in the DSP and provides tremendous
performance for attenuation levels >70dB. Analog notch circuits are
susceptible to fluctuations in attenuation or changes in temperature.
The DSP-based manual notch provides stable performance and is
not susceptible to such changes. Also, the DSP signal processing
executed within the AGC loop completely shuts off undesirable
signals, even with the AGC set to high speed. An automatic notch is
included to further enhance receiver performance.
IF
Filter
DAC
Speech compressor off
AF
AGC
100W
DAC
100W
DSP
■ Digital twin PBT
The IC-756PROII is equipped with DSP based twin PBT filtering. It
provides excellent performance on a completely different level than
analog filters. Set the frequency, and then adjust the passband width
of the received signal in steps of 50Hz using the dedicated twoposition knob. The passband width and direction of shift may be
graphically displayed on the LCD, if the operator chooses.
■ High-accuracy digital modulation and demodulation in all
modes
The DSP unit allows you to increase transmit/receive audio levels,
modulation, and demodulation — even while decoding RTTY. This
makes it possible to set the passband width of the IF filter for SSB
transmit to 3 different stages. The DSP unit also provides a
demodulation level suitable for high-grade HF performance and highfidelity sound.
2.5ms/Div
2.5ms/Div
■ Microphone equalizer (enables 121 different settings)
The IC-756PROII is equipped with a microphone equalizer that makes it
possible to set the frequency characteristics of the transmitted signal in
11 different stages for both the high-tone range and the low-tone range.
Considering all permutations, this provides for a total of 121 different
settings. With this flexibility of DSP based waveform shaping, it is
possible to adjust transmit audio quality depending on the application.
For example, it is possible to set the dynamic sound quality for “Pileup”
or to set pleasant sound for “Ragchewing”.
■ Variable level type noise reduction
The 32-bit floating point DSP has excellent calculation performance,
which processes complex and sophisticated algorithms. This allows
the DSP to attenuate noise without delay and extracts noise-level
signals. It is possible to vary the suppression level in 16 stages.
■ CW keying waveform shaping function
DSP controls the rise and fall of the CW transmit waveform. The
result is a proper CW waveform. The rise/fall timing is selectable to 4
stages of 2ms, 4ms, 6ms and 8ms. This makes it possible to set a
“Soft” or “Hard” CW signal, depending on your preference.
4
Enhanced functions
The best in operating convenience and features
■ Advanced receive functions
The RF stage’s front-end receive mixer is designed in a 4-element
configuration. In the IC-756PROII, this configuration is used in the
BPF stage at the RF top. Each element is examined to tune the
circuit after RF stage to mixer, which makes it possible to enhance
the receive performance. This significantly reduces 3rd and other
order distortion and provides a wide dynamic range. This means the
IC-756PROII will accurately capture weak signals that analog type
radios cannot hear, even in low bands with high noise levels.
■ Dual-watch
Dual-watch enables simultaneous two-frequency receive in the same
band, providing identical band and filter configurations in both receive
systems. This makes it possible to receive two signals simultaneously
as if two separate receivers are being used. This greatly enhances
split frequency operation; enjoy enhanced DX-operation by searching
for pickup frequencies while watching the transmit frequency of a DX
station experiencing pile-up. Or have a QSO while simultaneously
monitoring a DX net.
■ Real-time spectrum scope
A real-time spectrum scope is recognized as indispensable for DX
hunting. The IC-756PROII’s spectrum scope uses two colors to
display all RF signal activity within a user-selectable bandwidth. One
color indicates real-time RF signal activity, while the other color
provides peak hold indication. The spectrum scope may be used for
sophisticated applications such as identifying the band conditions,
quick discovery of stations, and confirmation of interval or call-back
frequency. Additionally, you may monitor normal band conditions,
while you display sub readout or transmit markers. In case of highband noise, the IC-756PROII is equipped with an attenuator
(10/20/30dB) dedicated to the spectrum scope, which allows a
reduction of total signal level at the band scope without affecting the
received signal.
■ Triple band stacking register
With the push of a band button, get quick memory recall of three
preferred operating settings (including antenna port) per band. Band
or mode hopping has never been easier. It’s the ultimate in multimode flexibility.
Real-time spectrum scope screen
■ Exceptionally clear SSB transmit signal
Using Icom’s advanced digital PSN modulation, the IC-756PROII
emits high-quality signals, which makes its transmitter suitable for
use as the exciter of a linear amplifier. Unwanted sidebands and
carrier leaks are almost completely eliminated. Further, the
transmitter employs a wide band power amplifier that incorporates
highly reliable bipolar transistors (2SC5125 × 2). The linearity and
IMD characteristics achieve superior signal quality never before seen
in any amateur redio transceiver. This makes it possible to transmit
RF signals with significantly reduced distortion.
■ Built-in high-stability reference crystall oscillator
The IC-756PROII’s transceiver
exhibits excellent frequency
stability of < 0.5ppm. This
assures stable communication
even for RTTY and SSTV
modes for which particularly
high frequency stability is
required.
High-stability reference crystal oscillation unit
■ Digital Voice Recorder (DVR)
The DVR feature is an indispensable function for DX hunting and
contests. The IC-756PROII is equipped with a DVR with 4 channels
for transmit and 4 channels for receive, for a total of 8 channels. High
quality digital mapping of the transmitted or received analog signal
provides high quality audio reproduction, resulting in a natural
sounding voice without any noticeable degradation. It is also possible
to use these 4 communication channels by allotting them freely with a
total recording time of 90 seconds. Each of the 4 channels for receive
has a recording time of 15 seconds, or 60 seconds total. Press the
key once in any TFT display mode and it becomes possible to not
only record or reproduce voice but also to record for up to 30 minutes
continuously. The receive audio may
be reproduced for the most recent 15
seconds back to an interruption in
recording. By constructing the
simplified control unit (page 26) and
connecting it to the microphone
connector, digital voice recorder
function may also be operated.
DVR key
■ Full-scale electronic keyer
Plug a CW, iambic paddle into the electronic keyer jack on the front
panel. Especially handy during long hours of operation, it is possible
to set the CW speed between 7 and 56WPM. The discriminating
operator may also set the dot/dash keying ratio (2.8:1 to 4.5:1) and
polarity, depending on preference. The keyer may also be set for
either right or left hand use. For the CW operator who prefers not to
use the IC-756PROII’s built-in electronic keyer, an ordinary key jack
is available on the rear panel, for bug or straight key and is fully
compatible with external keyers or PC keying.
■ Multi-function memory keyer
Enhance your contest operations. The IC-756PROII is fully equipped
with a convenient memory keyer, offering features such as memory
content editing function, auto-repeat function, serial contest number
automatic count-up function, contest number abbreviating function, and
more. These features will reduce effort when repeating a formatted
contents for calling CQ, continuous transmission of call sign, or contests.
Since it is possible to confirm the contents of memory on the display,
transmission mistakes are eliminated. Construct the simplified control
unit (page 26) and connect it to the microphone connector to enhance
operation of these memory keyer functions.
5
■ Quick split function
When the split button is pressed and held, the frequency of the subVFO is adjusted to the frequency in the main VFO. Using the split
function, it is also possible to control the following:
1. Vary the transmit frequency via the main dial.
2. Direct entry of the designated frequency.
3. Direct entry of the shift frequency.
You are now ready to “bag the DX” while other operators are still
tuning up.
■ Preamplifier and attenuator
The IC-756PROII incorporates two types of receive preamplifiers:
Preamplifier 1 (10dB) emphasizes modulation across all bands, and
preamplifier 2 (16dB) emphasizes sensitivity especially for high
bands. The attenuator is selectable in three stages, 6, 12 and 18dB.
When there is a strong signal from a local commercial station it
becomes possible to control the generation of distortion at the RF
stage of the receiver. It is also possible to retain the preamplifier and
attenuator settings for each band.
■ Variable noise blanker
The transceiver uses a new noise blanker design that provides
significant reduction of pulse-type noise. The noise blanker also
greatly enhances weak signal copy, allowing the operator to change
the sensitivity in 100 stages in accordance with the noise level
without distorting the target signal.
■ Frequency shift function for change from/to SSB to/from CW
A frequency shift function automatically adjusts the CW carrier point
when selecting from SSB mode, or vice versa. You may select “Shift
function off” whereby the frequency remains the same (by moving the
carrier point), or “Shift function on” in which the frequency is shifted
without moving the carrier point. Using CW-R mode it is possible to
set the carrier point to USB.
Enhanced TFT color display
■ High visibility
A high visibility 5-inch TFT color display has been integrated into the
IC-756PROII to provide ease of use and clear indication of the radio’s
many features. Various function settings such as frequency, memory
frequency, comment, filter setting status, RTTY tuning indicator, and
more are displayed in the upper portion of the display, The lower
portion of the display gives voice memory, characters of received
RTTY, and the real-time spectrum scope information. The display
color may be selected from 8 types, from vivid color to muted grays. 7
different font types may also be selected. These settings may be
made in any combination – customize your display to best suit your
personality or favored operating set-up.
■ Memory channel/memory list
The transceiver is equipped with 99 regular memory channels and 2
scan edges, totaling 101 channels. It is possible to enter text of up to
10 characters in each memory channel. It is also possible to display a
list of up to 13 memories at a time.
■ Simplified set mode
The IC-756PROII has a list display that allows the status of each set
mode item to be seen at a glance. Each function is divided into 4
setting groups and multiple items are listed or displayed to allow
quick access to the desired item. This allows the many functions of
the radio to be used with ease.
6
■ Digital meter simultaneously displays 4 transmit level indicators
With the digital meter (including peak-hold), it is possible to confirm
the output power, ALC, SWR, and COMP, all at the same time while
transmitting. The signal strength is also displayed while receiving.
Enhanced functions
■ Antenna system
· High-speed built-in auto antenna tuner covering up to the 50MHz
band
· 2-piece antenna terminal (incorporated with auto antenna selector)
· Dedicated receive antenna connector
■ Receive system
· General coverage receive (30kHz to 60MHz)
· Control of RF gain and squelch with one knob
■ Transmit system
· IF Monitor function allows the transmissions of your station to be
listened to locally
· Built-in 50 frequencies of tone encoder/decoder
· VOX function allows the automatic selection of transmit and receive
for “hands free” operation
· All-mode power control function
■ CW system
· CW pitch control function allows the CW receive tone to be set to a
desired frequency (300 to 900Hz continuously)
· Double key jack allows 2 types of keys to be connected
simultaneously
· Full break-in function allows receive during a break while keying
■ Operation system
· 5-channel memo pad saves frequency and mode
(It is also possible to change the 5-channel memo pad to a 10channel type.)
· RIT and TX variable up to ± 9.999kHz
· 1Hz pitch tuning
· Optional frequency speech allows the S-meter level to be
announced
· High visibility needle type white-tone analog meter
· Various scanning functions (program, memory, select memory, F)
· Auto Tuning Step
· Dial-lock
· Split frequency lock
· Torque adjustment mechanism for main dial
· Band edge beep function
· CI-V terminal allows control from a personal computer
· Clock/timer function
· AH-4 control circuit
3. Front and rear panel
3-1 Front panel
A
D
E
G
B
A
C
F
POWER SWITCH [POWER TIMER]
S/RF METER
TRANSMIT SWITCH [TRANSMIT]
HEADPHONE JACK [PHONES]
ANTENNA TUNER SWITCH [TUNER]
MONITOR SWITCH [MONITOR]
NOISE BLANKER SWITCH [NB]
NOISE REDUCTION SWITCH [NR]
ELECTRONIC KEYER JACK [ELEC-KEY]
B
AF CONTROL [AF]
RF GAIN CONTROL/SQUELCH CONTROL
[RF/SQL]
BALANCE CONTROL [BAL]
NOISE REDUCTION LEVEL CONTROL [NR]
MICROPHONE CONNECTOR [MIC]
MIC GAIN CONTROL [MIC GAIN]
RF POWER CONTROL [RF POWER]
COMPRESSION LEVEL CONTROL [COMP]
SEMI BREAK-IN DELAY CONTROL [BK-IN DELAY]
ELECTRONIC CW KEYER SPEED CONTROL
[KEY SPEED]
C
LCD FUNCTION SWITCHES [F1]-[F5]
MODE SWITCHES
FILTER SWITCH [FILTER]
EXIT/SET SWITCH [EXIT/SET]
7
D
MULTI-FUNCTION SWITCH GUIDE
LCD FUNCTION DISPLAY
E
KEYPAD
MEMORY UP/DOWN SWITCHES [ ][ ]
MEMORY WRITE SWITCH [MW]
MEMORY CLEAR SWITCH [M-CL]
QUICK TUNING SWITCH [TS]
TRANSMIT FREQUENCY CHECK SWITCH [XFC]
MEMO PAD-READ SWITCH [MP-R]
MEMO PAD-WRITE SWITCH [MP-W]
MAIN/SUB CHANGE SWITCH [CHANGE]
VFO/MEMORY SWITCH [VFO/MEMO]
MAIN/SUB CHANGE SWITCH [CHANGE]
DUALWATCH SWITCH [DUALWATCH]
SPLIT SWITCH [SPLIT]
F
RECEIVE INDICATOR [RX]
TRANSMIT INDICATOR [TX]
REC/PLAY SWITCH [REC/PLAY]
LOCK/SPEECH SWITCH [LOCK/SPEECH]
TUNING DIAL
LOCK INDICATOR [LOCK]
8
G
PASSBAND TUNING CONTROLS [TWIN PBT]
PBT CLEAR SWITCH [PBT CLR]
NOTCH SWITCH [NOTCH]
MANUAL NOTCH FILTER CONTROL [NOTCH]
CW PITCH CONTROL [CW PITCH]
TX SWITCH [ TX]
RIT SWITCH [RIT]
RIT/ TX CONTROL [RIT/ TX]
CLEAR SWITCH [CLEAR]
3-2 Rear panel
ANT2
ANT1
ACC (1)
ACC (2)
GROUND TERMINAL
CI-V REMOTE CONTROL JACK [REMOTE]
ANTENNA CONNECTOR 1 [ANT 1]/
STRAIGHT KEY JACK [KEY]
ANTENNA CONNECTOR 2 [ANT 2]
ACCESSORY SOCKET 1 [ACC (1)]/
DC POWER SOCKET [DC 13.8V]
ACCESSORY SOCKET 2 [ACC (2)]
SEND CONTROL JACK [SEND]
TUNER CONTROL SOCKET [TUNER]
ALC INPUT JACK [ALC]
RECEIVE ANTENNA CONNECTOR [RX ANT]
EXTERNAL SPEAKER JACK [EXT SP]
TRANSVERTER JACK [XVERT]
9
4. What is DSP in radio communication?
The term DSP stands for “digital signal processor”. When DSP is
used in a communication unit, the electrical signal processes
(amplification, filtering mixer, modulation, demodulation, etc.) are
handled by the DSP. Such signal processing, using numerical
calculations, is called “digital signal processing”.
Digital signal processing assures the same results every time
providing for the characteristics defined in the design phase. When
digital signal processing is utilized, it is not necessary to take the
adjustment deviations of the conventional analog circuit into
consideration. These deviations are caused by variations in
component characteristics, temperature change, or deterioration over
time. It is also possible to perform complicated processing tasks such
as Fourier transformation, adaptive control, special function
processing (*1), and more. Such complicated processing tasks are
very difficult and costly for a conventional analog circuit.
*1 Special function processing: Trigonometric function, inverse function of trigonometric
function, square root, logarithmic function, exponential function, etc.
Digital signal processing is also widely used in fields other than radio
communication units, such as:
· Modems for telephone circuits
· Surround-sound effects (stereo sets, stereo components)
· Echo canceller (telephone)
· Voice compression/coding (cellular phones)
It is possible for a computer CPU to execute digital signal processing.
However, a DSP differs from a CPU in that it has the dedicated
hardware construction required for the effective execution of digital
signal processing. Basically the unit has a multiplication/addition
circuit widely used for DSP to execute the combination of
multiplications and additions in one clock, and with an internal data
bus of more than two circuits, to fetch two data items required for
calculation at the same time. It also has a loop processing function to
execute repeated calculations with high efficiency and a data address
creation function to transmit signal data effectively, which are
assigned to consecutive addresses. These functions are incorporated
as dedicated hardware.
Because their performance has developed quickly, the CPUs
currently used for computers can execute digital signal processing. A
CPU with a high clock frequency may be superior in calculation
performance to a low-end DSP chip. When it is compared with a CPU
of equivalent performance, a DSP with hardware specialized to digital
signal processing has the following advantages:
· Low clock frequency
· Low integrity (reduced logic scale)
· Low power consumption (Low
heat energy generated)
· Low cost
When various judgment functions
are required, or when different
calculations are repeated each time,
a DSP is not suitable. The CPU is
then more suitable for such
processing.
DSP chip
10
Background to development of the first-generation
IC-756PRO
From the early stages of research into DSP transceivers Icom has
been on the forefront of shifting IF filter design from analog to digital
type filters. To put the digital IF filter to practical use it was necessary
to incorporate the digital IF filter into the AGC loop. It was also
necessary to provide AGC processing using the DSP. To achieve this
there remained a lot of technical problems to be resolved.
In the initial stage of research, it was not possible to complete the
DSP, A/D, and D/A devices in a radio unit at a practical cost, as
shortage in device capacity was a significant factor. Icom conducted
research into digital PSN modulation, noise reduction, automatic
notch, and audio peak filter, while also proceeding with research into
digital IF filter processing and digital AGC processing. This research
includes the ultra-narrow filter for CW that allows the advantages of
DSP to be fully utilized for commercialization of a DSP transceiver.
As the first devices were developed with improved capacity, Icom
started full-scale research into integrating the digital IF filter
processing (*2) and digital AGC processing in practical applications.
*2 Advantages of digital IF filter processing:
Since a digital IF filter is free from deterioration due to passband width deviations,
temperature changes, change in mechanical strength, etc., the changes seen in an
analog filter will not occur. It will not deteriorate through years of use and will provide
excellent ripple characteristics that are not possible with analog filters.
When the DSP filter is processed at the AF stage, the demodulated
AF signal is filtered after this. This filter type will function effectively
when the level of the interfering signal is equal to or less than that of
the desired signal. However, when the level of the interfering signal
increases, the AGC activates reducing the level of the desired signal
causing it not to be heard (AGC blocking phenomenon). This
phenomenon is caused by filtering taking place outside the AGC
loop. Even if filtering is executed at the IF stage before demodulation,
it is not possible to avoid this blocking phenomenon when the digital
filter is not incorporated in the AGC loop. Therefore, it is necessary to
execute both IF filter processing and AGC processing using the DSP
to prevent the AGC blocking phenomenon.
To realize a digital AGC, it is necessary to obtain the adjustment
range for AGC gain internally in the DSP (*3), and to input both the
desired signal and the interference signal into the A/D converter
without them distorting (*4). For these reasons, Icom decided on a
dynamic range for the A/D converter of at least 110dB, and
approximately 120dB when the margin is taken into consideration.
*3 To control the AGC attack response properly, it is necessary to adjust the gain even after
the completion of IF filter processing. If the adjustment range of gain within the DSP is set
to 60dB, it is necessary to obtain a wider dynamic range, as the noise floor is raised 60dB
under full-gain conditions where AGC is not applied.
*4 If the signal is distorted before entering the A/D converter, a distortion component may be
mixed in the band. If it is mixed in the band, it is extremely difficult to remove it by post
processing.
The DSP in the IC-756PRO/756PROII employs a 24-bit A/D
converter. The logical value of the dynamic range of a 24-bit A/D
converter is 144dB, however the actual value of the analog
performance is smaller than this and performance may differ
considerably, depending on the type of A/D converter used.
The A/D converter used for the IC-756PROII is a super-high
performance A/D converter that is also used in digital mixers for
recording studios and provides an actual analog performance value
of 120dB. To bring this performance to an optimum level it is
necessary to execute calibration for 10 seconds after powering on.
The wait time when IC-756PROII is started is allotted to the
calibration operation.
To execute the processing of data sampled by the 24-bit A/D
converter it is necessary to obtain 24-bit calculation accuracy. Since
the dynamic range is decreased substantially due to the scaling
operation (*5) for the accumulation of calculation errors or digital filter
processing, Icom felt the 24-bit fixed decimal point DSP would
provide insufficient calculation accuracy.
*5 Scaling
For digital filter processing, a frequency which causes the gain to increase may exist at
the intermediate stage of processing even if the filter used provides a passband gain of
0dB. For a fixed decimal point, DSP the calculation is executed with the gain decreased
in advance so as not to allow an overflow to occur due to a signal of that frequency.
This gain adjustment operation is called “scaling”.
Since the level of scaling required is also increased to provide an IF
filter with a sharp shape factor the calculation accuracy is liable to be
decreased, even if double-precision (32-bit fixed decimal point)
calculation is executed when using a high-speed 16-bit DSP. To
provide both the digital IF filter processing and digital AGC
processing using DSP, Icom determined it was necessary to use a
32-bit floating point DSP.
For a 32-bit floating point DSP, the numerical data within the DSP is
adjusted automatically according to the size of the numerical value.
Consequently, errors generated due to calculation are extremely
limited and the influence of calculation errors is almost negligible.
Because it is not necessary to consider the overflow during
calculation, the dynamic range will not be decreased due to the
scaling operation.
The 32-bit floating point DSP and 24-bit A/D-D/A converter use a
signal processing algorithm (newly developed to demonstrate its
performance) in combination for the reasons above, which make it
possible to provide highly accurate digital IF filter processing and
digital AGC processing. These new functions (FM demodulation, AM
modulation/demodulation, RTTY modulator, etc.) were incorporated
in the IC-756PRO to make it an IF DSP radio.
If the receive frequency is substituted for “fRX”, the input frequency for
“f 1 ” and the input frequency for “f 2 ” respectively, the following
relationship is established for 3rd order distortion component.
f1 × 2 ± f2 = fRX, or
f1 ± f2 × 2 = fRX
If there are inputs of 14.2MHz and 14.3MHz while 14.1MHz is being
received, the distortion component is heard at 14.1MHz. The relative
value of the input level when the signal can be heard at 14.1MHz and
the level of the signal received at the essential receive frequency is
called the “dynamic range”.
Figure 1 shows an example in which the following are plotted on the
same axis.
· Input/output characteristics at receive frequency, or the
characteristic data (a) for a case when the receive frequency
component input from the ANT is detected and output as a low
frequency signal
· Input level of frequency component (generating 3rd order distortion
from the receive frequency) and level (b) at which the distortion can
be heard at the receive frequency.
The difference in level at which (a) and (b) above can be heard is
the dynamic range.
The level at intersecting point between (a) and (b) above is called
IP3 (3rd order intercept point).
If these numerical values are large, it can be said that signal
processing is executed without distortion. When the numerical values
are small, a frequency component that does not exist in the essential
receive frequency is heard and distortion will be generated.
Dynamic range for A/D converter
Consider the dynamic range (used as an index for the performance of
an A/D converter) as the ratio between maximum value and minimum
value to be treated by the A/D converter. If the maximum resolution
for one bit is “Vmax” in the case of a 16-bit A/D converter, the
following is given:
Vmax ÷ 216 = Vmax ÷ 65536
In other words, the change in level for one bit is 1/65536 of Vmax.
This value seems to be an extremely small value, in decibels it will be
as follows:
Two Dynamic ranges
20log (1/65536) = –96.33dB
Dynamic range as RF performance
Fig. 1
[dB] 200
180
160
140
120
100
80
60
40
20
0
Output
(a)
3rdIMD
(b)
–140 –120 –100
–80
–60
–40
–20
0
–130 –110
–90
–70
–50
–30
–10
Dynamic
10 20 30 40 50 [dBm]
IP3
This means that an S/N ratio of over 96dB is never allowed for
transmit. The minimum resolution of signal the A/D converter can
treat is affected by its specifications, which are 24 bits and 144dB
logical value. Some may say that a transceiver is not a high-grade
audio system and therefore does not require a specification of 144dB,
or that a specification of 96dB is sufficient; however this value is not
an over specification. If there is no AGC in the DSP and the input
level of the A/D converter is properly controlled by the analog circuit
AGC, the specification of 96dB will be sufficient (the IC-775DSP uses
this system). When the A/D converter is in the AGC loop, the input
level of the A/D converter may fluctuate significantly. For this reason,
the gain control by AGC within DSP requires at least the dynamic
range of the A/D converter.
“Dynamic range” from the viewpoint of RF performance indicates to
what extent the distortion component (generated due to the
frequency of a signal) can be heard at the receive frequency when a
frequency component different from two receive frequencies is input.
“Dynamic range” generally means the value by 3rd order distortion
component.
11
5. Circuit description
5-1 Digital IF filter
For IC-756PROII the transmit/receive passband width in all modes is
determined by the digital IF filter using DSP. A filter of this type
provides an ideal shape factor that cannot be achieved by an analog
filter. If an attempt is made to increase the shape factor and band
ripple characteristics of an analog filter, it is necessary to increase the
number of crystal components (or ceramic elements), which may
result in physical restrictions. A digital IF filter using DSP assures the
desired characteristics by overlaying multiple filters. This is governed
only by the processing volume of the software and it is possible to
overlay such filters with any number of stages.
756PROII SSB
COLINS10
[dB] 10
When using a digital IF filter the beat frequency of an unwanted
adjacent signal moves out of the filter passband width, which will not
cause interference. (Fig. 1.2) This is the greatest difference between
an analog IF filter and a digital IF filter. During “pile-ups”, such as
those that occur in DX’peditions, contests, etc., it is possible to make
a proper selection suitable to the application by selecting the broad
filter shape (SOFT).
5-1-1 CW sharp filter
The digital IF filter offers an ideal shape factor which has never been
available with conventional analog filters. It enables a greater ability
to receive weak stations that may lie behind radio interference. This
is the filter shape that Icom would suggest to the DX hunter due to its
superior cut-off performance. The cut-off performance is of a level to
actually extend the CW band as explained above.
–0
CW sharp filter characteristic
Response
–10
–20
CW Filter (BW 50/100/150/200/250/300/350/400/450/500Hz)
–30
[dB] 10
–40
0
–50
–10
–60
–70
00 1500 1000 –500 0
500 1000 1500 2000 [Hz]
–
–
Input frequency
–20
–20
–30
–40
The diagram shows a graph of receive selectivity when the IC756PROII is set to the SSB BW mode of 2.4kHz as well as the
selectivity characteristic of each Collins 10-pole mechanical filter. The
digital IF filter of the IC-756PROII is of a design equivalent to a 14pole filter. The filter serves to cut the undesired adjacent signals
sharply under any circumstances using the superior shape factor
(sharp/soft) and 51 types of variable passband width provided by IF
stage processing using the DSP. When viewing a received CW signal
the difference between the cut-off performance of this filter and that
of an analog IF filter is evident.
In a transceiver equipped with a conventional analog IF filter the beat
frequency of an adjacent signal is present when the CW signal is
received resulting in interference. The beat frequency is contained in
the skirt of the filter even if it is out of the set band range. (Fig. 1.1)
[dB] 30
Fig. 1.1
Conventional
analog filter
The signal out of setting
band is also heard as
CW reception sound.
20
10
0
–10
–20
–30
Beat frequency
–40
–50
–60
–70
–80
–90
–100
–800 –600 –400 –200
0
200 400
The signal out of setting
band is not heard as
CW reception sound.
–80
–90
–100
50
100
150
200
250
300
350
400
450
500
5-1-2 CW soft filter
The skirt characteristics of the soft filter are broadened so that the
listening level of the filtered signal is the same level as that of a
conventional analog filter. When using the radio for DX’pedition the
filter is recommended for “pile-up” operation and is most suitable for
the CW DX’peditioner and CW contestant.
CW Filter (BW 50/100/150/200/250/300/350/400/450/500Hz)
0
–10
600
800
–20
–30
–40
20
10
–50
–10
–20
–30
–40
Beat frequency
–50
–60
–70
–80
–90
–100
–800 –600 –400 –200
0
200 400
0
[Hz]
[dB] 30
–60
–70
–80
–90
–100
600
800
[Hz]
500Hz setting
12
–70
[dB] 10
[Hz]
Digital filter of
IC-756PROII
–60
CW soft filter characteristics
500Hz setting
Fig. 1.2
–50
0
50
100
150
200
250
300
350
400
450
500
[Hz]
5-1-3 SSB sharp filter
This filter creates an ideal shape factor and in-band flatness, and
makes it possible to cut out-of-band signals while reproducing the inband signal, without deteriorating sound quality. This filter shape is
most suited for situations which emphasize ragchewing and receive
sound quality.
AM Filter Characteristic
AM Filter (BW 3/6/9kHz)
[dB] 20
0
–20
SSB Sharp Filter
–40
SSB Filter (BW 2.4kHz)
[dB] 20
–60
0
–80
–20
–100
–40
–60
–120
–10
–8
–6
–4
–2
0
2
4
6
8
–80
10
[kHz]
–100
FM Filter Characteristic
–120
FM Filter (BW 7/10/15kHz)
–140
[dB]
–160
–4000 –3000 –2000 –1000
0
0
1000 2000 3000 4000 5000 6000
[Hz]
–20
5-1-4 SSB soft filter
The soft filter shoulder is rounded to provide a receive sound
approximating an analog filter. The noise is reduced for high-pass
and low-pass to improve the S/N ratio for the desired signal. This
function will demonstrate its effect when the signal closest to the
noise level is picked up in the 50MHz band. Since the desired skirt
characteristics are maintained it assures superior filtering
performance.
–40
–60
–80
–100
–120
SSB Soft Filter
–10
–5
0
5
10
[kHz]
SSB Filter (BW 2.4kHz)
[dB] 20
0
Digital IF filter transmission band (51 types)
–20
Application mode
FILTER
Standard values
FIL1
3.0kHz
FIL2
2.4kHz
FIL3
1.8kHz
FIL1
1.2kHz
FIL2
500Hz
FIL3
250Hz
FIL1
2.4kHz
FIL2
500Hz
FIL3
250Hz
FIL1
9.0kHz
FIL2
6.0kHz
0
FIL3
3.0kHz
–10
FIL1
15kHz
–40
–60
SSB
–80
–100
–120
SSB•D
CW
–140
–160
–4000 –3000 –2000 –1000
0
Setting range (step width)
50–500Hz (50Hz) /
600–3.6kHz (100Hz)
50–500Hz (50Hz) /
600–3.6kHz (100Hz)
1000 2000 3000 4000 5000 6000
[Hz]
RTTY
5-1-5 Other digital filters
RTTY filter characteristics
RTTY Filter (BW 250/300/350/500/1000Hz)
AM
[dB] 10
–20
FM
–30
FIL2
10kHz
FIL3
7.0kHz
50–500Hz (50Hz) /
600–2.7kHz (100Hz)
–
–
–40
–50
–60
–70
–80
–90
–100
–100
0
100
200
300
400
500
600
700
800
900 1000
[Hz]
13
5-2 Digital functions
5-2-1 Noise reduction, automatic notch
An adaptive filter made up of an FIR filter and LMS algorithm as
shown in Fig. 2 is used to provide the basic configurations of noise
reduction and automatic notch. This adaptive filter (*5) separates the
target signal and noise, the correlation of separation parameters, and
controls the coefficient of the FIR filter with the LMS adaptive
algorithm to minimize the error between the output of the FIR filter
and the reference signal.
*5 Adaptive filter
This type of filter is called an “adaptive filter” since the filter characteristics are changed by
adapting to the characteristics of the input signal.
Adaptive
algorithm
Error signal
Coefficient
control
Input signal
Correlation
separation
parameters
–
FIR filter
remove interference correctly even when more than two tones occur.
As the tone frequency changes the interference is followed and
removed automatically. Since the characteristics are adjusted to
minimize the influence upon a voice, it can be used in SSB mode
without any sense of incongruity even if automatic notch is turned on
all the time.
5-3 PSN modulation
The IC-756PROII adopts a digital PSN modulation system for SSB
modulation processing to provide superior band characteristics and a
high transmission S/N ratio. This means that unwanted sidebands
and carrier leaks are almost completely eliminated. This section
explains the principle of operation while comparing the PSN type
SSB modulator with the analog filter type SSB modulator used in
conventional analog transceivers.
5-3-1 Analog filter type SSB demodulator
The configuration of analog filter type SSB modulator is shown in Fig. 3.
∑
Balanced mixer
+
MIC
Reference signal
Modulated output
f1
IF filter
Adaptive filter output
Fig. 2
5-2-2 Noise reduction
The adaptive filter allows the target signal to pass while the noise
component (random signal) is attenuated. The voice signal has a
high short-time correlation and a low long-time correlation. (For
discrimination the signal correlation is called “short-time” or “longtime” for convenience, however it is a difference of only several
hundreds microseconds.) If the correlation separation parameters are
set to allow short-time correlation to be detectable, the voice signal is
detected as a low correlation component, and the noise as a high
correlation component. In this case the voice component must pass
as it is, and only the noise component is attenuated. The noise
reduction effect is random at the head of a word (the moment when
speech begins) and at points where intonation changes significantly.
If the noise reduction effect is increased too much, the voice
component may be attenuated together with the noise as described
above. In this case it may decrease clarity, even if the S/N ratio is
improved.
The transceiver is designed with the flexibility to set the noise
reduction level accurately (16 stages) in order to meet all
circumstances. This makes it possible to adjust the balance between
the S/N ratio and clarity quickly.
5-2-3 Automatic notch
If the correlation separation parameters are so set to allow long-time
correlation to be detectable, the voice signal is detected as a low
correlation component, and only the tone signal is detected as a high
correlation component. If the correlation separation parameters are
set to allow long-time correlation to be detectable the voice signal is
detected as a low correlation component, and only the tone signal is
detected as a high correlation component. Since this setting makes it
possible to separate the tone signal component from the voice
component the output from the adaptive filter will be only the tone
signal. Since the phase and amplitude of the tone signal from this
adaptive filter become the same as those of the input signal, the
output of the error signal shown in Fig. 2 makes it possible to obtain a
voice signal from which the tone signal is removed. In other words,
this adaptive filter setting will operate as an automatic notch to
remove beat interference such as CW and RTTY signals, which may
interfere with SSB. Automatic notch makes it possible to detect and
14
f2
Modulation carrier
Fig. 3
If the tone signal of frequency (f1) is presented to a microphone, two
spectra (f2–f1 and f2+f1) are generated against the mixer output as
shown in Fig. 4.
Frequency
(f2–f1)
f2
(f2+f1)
Fig. 4 Mixer output spectrum
Passing
characteristics
of IF filter
Frequency
(f2–f1)
f2
(f2+f1)
Fig. 5 SSB demodulated wave
This mixer output passes through the IF filter, passing only the
necessary band. Its unwanted sideband is attenuated, which assures
a modulated SSB signal. (Fig. 5)
Since the performance limits of the IF filter become the performance
limits of the modulator in an analog filter type SSB modulator (Fig. 3
shown on page 14) the problems below will exist:
1. The ripple characteristics within the passband of the IF filter is
reflected directly upon the entire frequency characteristic of the
modulator.
2. There is a limitation in the shape factor of an IF filter.
If an attempt is made to execute the modulation output to be
excessively low-bandwidth it becomes unable to fully restrict the
unwanted sideband signal.
3. A crystal IF filter with a good shape factor may not provide the
satisfactory group delay characteristics in many cases and may be
inferior from the viewpoint of sound quality.
(f2–f1)
(f2+f1)
180° phase difference
same phase
(f2–f1)
(f2+f1)
Point A2
Point B2
Modulated output
5-3-2 PSN type SSB modulator (basic type)
The PSN type SSB modulator uses phase shift operation to negate
the unwanted sideband signal and to attain a modulated SSB signal.
If it is possible to reduce the phase difference at low-band of a 90°
phase shifter it will assure superior characteristics to the filter type
SSB modulator as it is possible to attain a higher unwanted sideband
signal suppression ratio compared with that at low-band.
All-pass
filter-A
A1
A2
MIC
f1
90° phase
shifter
Modulated output
All-pass
filter-B
B2
B1
f2 Modulation carrier
Fig. 6 Configuration of PSN type SSB modulator
The two filters (filter A and filter B) shown in Fig. 6 are combined to
make a 90° phase shifter. This is an all-pass filter (*6) designed using
two filters in pairs so that the signal output from each filter appears to
have a phase difference of exactly 90° when the same signal is input.
*6 All-pass filter:
An all-pass filter is used to change only the phase without changing the amplitude of the
signal sent from the all-pass filter.
Point A1
90° phase difference
Point B1
Fig. 7 Output signal of all-pass filter
Fig. 8 Phase relationship of modulated signal
The PSN type SSB modulator provides an SSB modulated signal by
eliminating the unwanted side band component. To achieve this it is
necessary to keep the phase difference accurately and to set the
amplitudes to precisely the same level.
With a PSN type SSB modulator using analog circuit, such problems
as changes in characteristics due to deviation in parts or temperature
may occur. Accordingly, it is very difficult to achieve the same
unwanted sideband signal restriction ratio with a filter type SSB
modulator.
For these reasons few transceivers adopt the analog type PSN.
Using the DSP it is possible to provide stabilized performance even if
the PSN method is used, as it has few of the fluctuations seen in the
analog circuit.
5-3-3 Icom’s PSN type SSB modulator
Figure 6 is a basic configuration drawing of a PSN type SSB
modulator. The IC-756PROII adopts the PSN type SSB modulator
using Icom’s unique architecture shown in Fig. 9.
This method makes it possible to obtain an effect equivalent to multirate processing (*7) even if the sampling rate is not decreased during
all-pass filter processing. This makes it possible to improve the DSP
calculation by more than two times which is required for accurate
SSB modulation processing. The part of modulated carrier
multiplication in the conventional method is changed to the
multiplication of a constant leading to an improvement in efficiency.
*7 Multi-rate processing
A method of processing that uses the multiple sampling rates selectively, depending on the
frequency of signal to be processed.
Even if the processing contents are the same, the processing of a lower sampling rate will
decrease the volume of calculations.
a1
All-pass filter-A
Voice input
All-pass filter-B
a3
All-pass filter-A
Multiplexer
a2
Demultiplexer
When a signal (frequency: f 2) having a phase difference of 90°
against the signal output from the all-pass filter of two lines (A, B)
transmitted from a station is modulated with the tone signal of
frequency (f1) presented to the microphone, two spectra (f2–f1 and
f2+f1) are generated at two points, point A2 and point B2 respectively,
each of whose phase relationship is as shown in Fig. 8. The signal at
point A2 is added to that at point B2 as indicated. The sideband
signals having a phase difference of 180° are negated while the
sideband signals of the same phase add with each other, causing an
output whose amplitude is doubled. The example shown in Fig. 8
shows a USB signal that is obtained.
When an LSB signal is required for modulated output, it is best to add
it after inverting the polarity. Since the component with a 180° phase
difference is replaced with that having the same phase the modulated
output appears to be an LSB signal.
Modulated output
a4
All-pass filter-B
Fig. 9 Configuration of Icom’s PSN type SSB modulator
15
For the SSB modulator shown in Fig. 9, the signal is input to each
filter sequentially for each sampling cycle by using a multiplexer with
4 all-pass filters (filter A, filter B, each designed for a phase difference
of 90°) arranged alternately to multiply each filter output by the
constants (a1 to a4).
Using the multiplexer the result of multiplication is output sequentially,
making it possible to gain the desired SSB-modulated output signal.
[dB]
20
0
–20
–40
· For USB: Constant {a1, a2, a3, a4} = {1, 1, –1, –1}
· For LSB: Constant {a1, a2, a3, a4} = {1, –1, –1, 1}
–60
For PSN modulation processing using the 16-bit fixed decimal point
DSP of conventional transceivers, the characteristics are adjusted to
decrease the influence of the rounding error (when the filter
coefficient is quantized) as it occurs. For the 32-bit floating point DSP
nearly ideal characteristics are assured as the influence of errors due
to quantizing is extremely limited. The IC-756PROII was re-designed
with this point taken into consideration to further improve the lowband characteristics as compared with conventional transceivers.
Figure 10 shows the restriction characteristics of an unwanted
sideband signal and the pass characteristics of the desired sideband
signal.
[dB]
–80
–100
–800
–600
–400
–200
0
200
400
600
800
[Hz]
Characteristics of manual notch
[dB] –20
0
Desired sideband
–10
–30
–20
–40
–30
–50
Unnecessary sideband
–40
–50
–60
–60
–70
–70
–80
–80
–90
–90
–100
101
102
103
104
–100
–150
–100
–50
0
50
100
Fig. 10 SSB modulation characteristics
5-4 Manual notch
The IC-756PROII manual notch filter has extremely sharp
characteristics which can be provided only by DSP processing.
Since this manual notch is processed within the AGC loop even
powerful beats are cut-off sharply without any influence upon the
AGC. The filter characteristics are sharp and the passband width is
held to approximately 50Hz with an attenuation level of over 70dB.
This makes it possible to adjust the notch point accurately. Only the
DSP provides the characteristics as shown above.
With an analog type notch filter (crystal or LC notch filter) it is not
possible to adjust the notch point characteristics accurately as shown
above, as the frequency characteristics are liable to deviate. The
manual notch assures stable filter characteristics by DSP processing
because of its extremely sharp characteristics and the high-stability
reference oscillator provides superior frequency stability.
Accordingly it provides stable operation such that it is not necessary
to re-adjust the notch point, provided the beat signal is not moved
once it is set.
16
150
[Hz]
[Hz]
Characteristics of manual notch (enlarged view)
5-5 Speech compressor
The IC-756PROII is equipped with a newly developed RF type
speech compressor. The configuration of the speech compressor is
shown in Fig. 11.
Amplitude control Band limiting
filter
amplifier
PSN
modulation
processing
Data buffer
Adjustment of
compression gain
Analysis of
amplitude level
Determination
of control level
Fig. 11 Configuration of speech compressor
The operating principle of this compressor is that the SSB-modulated
IF signal is saved in the data buffer for a fixed time at first, and then
the IF signal saved in the buffer is analyzed for amplitude level. The
control level of the amplitude control amplifier is determined in
accordance with the analysis, providing compression control such
that the signal peak does not exceed a certain level. In other words,
the amplitude of the current signal is controlled in accordance with the
change in amplitude over a certain previous period.
Unlike the RF compressor used widely in conventional analog
processing type transceivers little distortion will occur as the signal is
not clipped. The speech compressor resembles an AGC type
compressor in that the signal level is controlled, however the normal
AGC method has a lot of problems. It is usually considered that the
AGC type has an improved compression effect along with shortened
gain recovery time constant, compared to the grip type. Setting the
time constant to a low level may bring about an inferior compression
effect as the adjustment range of the time constant is limited due to
spoiled AGC loop stability.
The Icom type compressor assures a high compression effect as
there are no problems due to the non-execution of feedback
processing with a proper follow-up performance against changes in
amplitude of the IF signal. Even when the compression level is high
only a slight distortion outside audible range may occur. To prevent
the transmit passband width from extending a wide-band limiting filter
is used. Since this filter was designed to prevent group delay
degradation, it does not have an influence upon the modulated sound
quality.
Distortion generated by compressor processing
For distortion generated by compressor processing, only the high
order distortion may be addressed in many cases. Also, mutual
modulation distortion may occur when the input signal is of 2 tones or
more. The RF stage grip-processing compressor is better than the AF
stage grip-processing compressor from the viewpoint of high-order
distortion. The reason why it is not so highly rated from the sound
quality viewpoint is because there is a problem with mutual
modulation distortion. The AGC type compressor provides a lower
mutual modulation distortion level as compared to the grip-processing
compressor assuring better sound quality. The Icom type restricts
mutual modulation distortion similarly.
The microphone equalizer of IC-756PROII allows smooth selection of
characteristics and may be adjusted accurately over 11 stages for
high band and low band. This makes the frequency characteristics
adjustable without any sense of incongruity.
5-7 RTTY demodulator
The IC-756PROII is equipped with a built-in demodulator/decoder
function (for BAUDOT RTTY) for the first time in an HF amateur
transceiver. It is possible to decode RTTY signals using the
transceiver independently even if external units such as multi-function
TNC, and a RTTY terminal unit (compatible to RTTY) are not used.
When the RTTY signal is decoded the DSP unit executes the
demodulator processing and the binary signal (BAUDOT) obtained is
decoded by the main CPU, and its characters are displayed in the
lower portion of the display. Figure 12 shows the configuration of
demodulator processing using DSP.
AF amplifier
TPF OFF
DAC
TPF ON
Amplitude limit
Hysteresis
comparator
Twin-peak
audio filter
Mark space
signal
detection
Threshold level
(setting of hysteresis level)
Inside of DSP
5-6 Microphone equalizer
[dB] 25
20
15
10
5
0
–5
–10
–15
–20
102
103
Main
CPU
BAUDOT
demodulation
signal
Fig. 12 Configuration of RTTY demodulator
The microphone equalizer characteristics used for the IC-756PROII
are based on the frequency characteristics of the audio tone control
circuit which has been re-designed to be dedicated to voice
frequency range. The transmit function of an analog filter is simulated
and converted into that of a digital filter to provide the microphone
equalizer function. In some microphone equalizers for transceivers
the characteristics may change suddenly with a specific frequency as
a limit. Unnatural sounds may be generated by such equalizers
depending on their tone quality. Not in Icom’s.
–25
101
Decoding processing
104
105
[Hz]
Most conventional RTTY terminal units or TNCs use either the PLL
type or filter type demodulator to detect the mark/space signal. When
the communication conditions are undesirable due to interference,
fading, etc., the filter type is generally superior. The demodulator
processing of IC-756PROII uses the basic configuration of a filter type
demodulator.
For demodulator processing in DSP the amplification and amplitude
limitations are first executed against the audio signal demodulated
through product detection. This processing provides sufficient
demodulation performance against even low level signals that do not
move the S-meter, so there is no influence due to deviations in
amplitude. The twin-peak audio filter then removes the radio
interference and improves the S/N ratio before detecting mark/space
signals. Two narrow-band pass filters are used in detection processing
to extract the components near the mark frequency and space
frequency. The output of each filter is detected and balanced, polarity
reversed, and then passed to comparator processing. The comparator
processing has a hysteresis characteristic such that it is hardly
affected by fluctuations in the noise component. The hysteresis width
is adjustable by changing the threshold level value on the RTTY
decoding screen. The comparator determines the signal for polarity.
The result is converted into a logic signal and then transmitted to the
main CPU. The main CPU decodes the RTTY signal and displays the
characters on the display screen.
Characteristics of microphone equalizer
17
In filter type demodulators, the difference in filter characteristics
appears to be a difference in decoding performance. The filter will
enhance the decoding ratio provided a high performance filter is
used. It is also influenced by the phase and time response
characteristics. Twin-peak audio filters and mark/space signal
detection filters are carefully tested to adjust their characteristics.
Final development of the Icom filter was conducted in part in
cooperation with veteran stations with a long RTTY history. A
decoding ratio equivalent to a dedicated RTTY unit such as TNC or
RTTY terminal units designed for existing RTTY is achieved. For the
IC-756PROII RTTY demodulator the effect of twin-peak audio filtering
has made a significant contribution to improving the decoding ratio.
When the RTTY mode setting is selected, it becomes possible to
change the speaker output and the audio output through the
accessory terminal to a signal filtered by the twin-peak audio filter.
Using this function it is possible to improve the decoding ratio of a
TNC, terminal unit, etc. connected to the radio. Since the twin-peak
audio filter is connected at all times to the built-in demodulator, it is
not necessary to set the twin-peak audio filter output when using only
the built-in demodulator.
5-8 Receiver
Receiver block diagram
The signal received at the antenna terminal (ANT1/ANT2) passes
through the antenna selector and enters the RF-A unit through the
LPF built into the CTRL unit. When the antenna tuner is turned on the
IC-756PROII removes interference and cross modulation from
unwanted radio signals to some degree in the first stage during
receive, using the coil/capacitor of antenna tuner, and by allowing the
signal to pass through the matching circuit. The signal input to the
RF-A unit passes through the relay selectable ATT circuit (6/12/18dB)
and is lead to the BPF stage which is divided into 13 sections.
Various frequency components are included in the input side of the
BPF stage. When distortion occurs in the BPF stage input side the
distortion component may enter the band resulting in an interfering
signal. However high-performance BPF may be used. The PIN diode
with wide-range frequency characteristics and limited secondary
distortion (Motorala, MMBV3700) is used to restrict such distortion. In
addition, a large-sized coil (L) is used in the BPF stage element. The
capacitor (C) provides low conductivity and low distortion. This
prevents the IMD characteristic from being deteriorated by the filter
and significantly improves the performance against the influence of
adjacent intensive electric fields and weak signals.
13-division BPF stage
18
Band
Control signal
Band
Control signal
0.03–1.6MHz
B0
11–15MHz
B7
1.6–2MHz
B1
15–22MHz
B8
2–3MHz
B2
22–30MHz
B9
3–4MHz
B3
30–50MHz
B10W
4–6MHz
B4
50–54MHz
B10
6–8MHz
B5
54–60MHz
B10W
8–11MHz
B6
BPF stage
Having passed through the BPF stage the signal enters the
preamplifiers (2 types). Preamplifier 1 is a GG (granted gate)
amplifier of push-pull configuration instead of the conventional FET
gate-earth type parallel amplifier. Preamplifier 2 is designed with gain
for high-bands emphasized and is suitable for antennas with
increased loss, small-loop type antennas having a limited band, and
compact type YAGI antennas. The gain is set to approximately 10dB
for preamplifier 1 and to approximately 16dB for preamplifier 2.
After passing through a preamplifier, the signal enters the parallel GG
(granted gate) amplifier arranged at the front of the 1st mixer. This
amplifier compensates for the loss of the splitter circuit for dual watch
and isolates the main mixer from the sub-mixer. This signal enters
the 1st mixer through the GG amplifier.
The mixer circuit incorporates a double balanced mixer in which four
FETs are used to provide high IP and high dynamic range. This
provides a significant improvement of the S/N ratio with limited
distortion against large input signals, and provides superior 2-signal
characteristics with no influence from the strong signals of an
adjacent frequency.
The 1st mixer and LO circuits are arranged in two sets to provide the
dual-watch function. The signal is converted to 64.455MHz by the 1st
mixer and then passes through a variable type attenuator (using the
PIN diode) to adjust the dual-watch balance where an attenuation of
approximately 70dB (maximum) is assured. The receive level is
adjustable for main band and sub band by changing the balance.
The GG amplifier (located in the succeeding stage) as well as the GG
amplifier (located at the input side of the mixer) isolates the main
mixer from the sub-mixer, improving the 2-signal characteristics,
while maintaining the impedance (as viewed from the mixer) at a
constant level. A combiner transformer determines the output for
main mixer and sub mixer. The IF stage following the combiner
transformer uses the circuit used for the main mixer and sub-mixer in
common. The received signal passes through the 1st filter to
eliminate unwanted signal components in the mixer stage. The 1st IF
filter is a crystal filter selected taking 3rd order distortion into
consideration. After passing through the 1st IF filter the signal is
controlled by the AGC. It then enters the 2nd mixer through the 1st IF
amplifier. This mixer is a diode double-balanced type with high IP
which is highly effective against in-band IMD and adjacent signal
interference. The element of the signal converted to 455kHz by the
2nd mixer enters the noise blanker circuit. The IF amplifier is
connected to the noise blanker circuit by 4 stages in series to assure
high gain. When the threshold level of the circuit used to control the
noise blanker gate is varied, it is possible to change the noise blanker
level in 100 stages.
The signal is further amplified by the 2nd IF amplifier and enters the
2nd IF filter. This is a ceramic filter with a high shape factor and a
center frequency of 455kHz to restrict the maximum passband width
of the signal passed to the DSP. The 455kHz signal is then passed to
the 3rd mixer. The IC-756PROII uses a high-speed analog switch
instead of the conventional mixing IC to improve the adjacent
dynamic range characteristics and to restrict distortion.
An active LPF (consisting mainly of an operating amplifier) is included
to collect the necessary frequency component (36kHz) from the 3rd
mixer output. The capacitor of this active LPF circuit is a film type
capacitor with limited distortion and superior temperature
characteristics. The signal is then amplified and passed to the DSP
port.
The 36kHz IF signal is differentially converted by the operating
amplifier and is passed to the A/D converter. The signal is passed to
the DSP IC through the level converter. The DSP IC is operated as a
digital IF filter of 36kHz or as a demodulator under each mode. The
demodulated signal is then passed to the D/A converter through a
level converter and converted into an analog signal to pass through
the low-pass filter via a differential input type active filter, buffer
amplifier and analog switch to remove unwanted signals. The filtered
signal passes through the analog switch to absorb the demodulation
level difference between each mode with a demodulation level
equalizing circuit.
DSP-A board block diagram
19
5-9 Transmitter
The voice signal enters through the microphone and is amplified by
the VCA (voltage control amplifier). The voice signal is controlled in
gain and passed to the DSP as the DTAF signal through the analog
switch. The VCA controls the gain of the microphone in accordance
with a signal output from the main CPU. When SSB mode is
selected, the signal enters the amplifier through the analog switch
and passes through the low-pass filter entering the differential
amplifier, to restrict the band of the A/D converter input signal. When
FM/AM mode is selected, the signal passes through the limiter
amplifier, low-pass filter and pre-emphasis circuit, and enters the
differential amplifier in the same manner as SSB mode. The amplified
signal enters the A/D converter and enters the DSP IC through the
level converter. After the signal has been demodulated by the DSP
IC, it is output as a 36kHz transmit IF signal. The demodulated signal
passes through the level converter and is converted to an analog
signal by the D/A converter. The analog signal passes through the
differential input type active filter and enters the analog switch
through the buffer amplifier.
The signal then leaves the analog switch and enters the Main-A unit
through the LPF as the DTIF signal to attenuate the out-of-band,
spurious, or image noise. The signal is converted to the 2nd IF of
455kHz by the 3rd mixer circuit built into the Main-A unit and passes
through the ceramic filter and IF filter via IF amplifier, to enter the RFA unit. The 2nd IF signal is mixed with a 64MHz signal sent from the
PLL circuit by the 2nd mixer, converted to an IF signal of 64.455MHz,
stripped of unwanted components by the XTAL BPF, and enters the
IF amplifier. The ALC is applied to the IF amplifier.
The IF signal is converted to the desired frequency by the HSB88WS
diode mixer, stripped of unwanted frequency components by the
60MHz cut-off LPF, amplified by the RF YGR amplifier, and is then
output to the PA unit. The transmit signal passes through a class A
type amplifier, is amplified by the class AB push-pull amplifier, and is
then amplified to 100W by the final amplifier (2SC5125 × 2). In the
output of the final amplifier the higher harmonic is attenuated by the
transmit PF compatible with each band.
Transmitter block diagram
The IC-756PROII uses a well-balanced push-pull amplifier and LPF
to provide an enhanced harmonic level for all bands of approximately
60dB (practical value).
The demodulation input/output to/from DSP uses the 24-bit A/D-D/A.
The demodulation input/output to and from the DSP uses a 24-bit
A/D-D/A converter. The use of the high-bit A/D-D/A converter
significantly reduces modulation distortion due to bit error. Note that
the limited number of bits causes the level deviation/bit to be
increased and consequently causes the non-linear movement and
demodulation distortion to be increased. The limited number of bits
may also cause the maximum output level/noise output level ratio to
10dB/
1W
Noise within transmission band
without modulation in SSB
CENTER 14.20150 MHz
20
SPAN 50.00 kHz
be decreased resulting in an increased noise level when
demodulation is not executed. This relationship will theoretically be
“number of bits × 5dB”. For a 16-bit D/A converter this is a S/N of
96dB. Comparing the rated output of 100W with the noise when
demodulation is not executed the S/N will be the value obtained by
subtracting the gain controlled by ALC from 96dB. When the 20dB
gain control is executed at 100W, using the ALC for instance, the
value of 76dB (=96 – 20) will be the ratio between noise when
demodulation is not executed and level at time of 100W transmit.
For 24 bits this is 124dB (=24 × 6 – 20). As a result the noise of the
A/D converter is reduced to a level where it is not a problem.
SSB 2-tone IMD (transmission)
10dB/
100W
CENTER 7.05000 MHz
SPAN 10.00 kHz
U S B
L S B
C
W
RTTY
A
M
F
M
U S B
L S B
C
W
RTTY
A
M
F
M
DIFF CONV.
µPC4570
A/D CONV.
C55396-KS
AM/FM
Low-pass
filter
M5218 1/2
Low-pass
filter
NJM2058 2/4
SSB
Limiting
amplifier
M5218 1/2
3rd IF
36.000kHz
36.000kHz
36.000kHz
33.875kHz *
36.000kHz
36.000kHz
2nd IF
456.500kHz
453.500kHz
455.000kHz
454.830kHz *
455.000kHz
455.000kHz
AM/FM
U S B
L S B
C
W
RTTY
A
M
F
M
* RTTY
TONE : 2125Hz
SHIFT: 170Hz
BW:15kHz
Crystal
filter
Limiting
amplifier
NJM2058 1/4
SSB
DTAF
AF
amplifier/VCA
µPC5023-077
MIC
IF
amplifier
2SK882
Low-pass
filter
1st IF
64.456500MHz
64.453500MHz
64.455000MHz
64.454830MHz
64.455000MHz
64.455000MHz
ALC
Low-pass
filter
1st mixing circuit
HSB88WS
BW:
4kHz/
6kHz
DTIF
66.255–66.455
67.955–68.355
71.455–71.755
74.555–74.955
78.455–78.805
f1(MHz)
Band
18
21
24
28
50
Self-oscillation
2SK210
Buffer
amplifier
2SC4081
LEVEL CONV.
TC74VHC
125FT
Self-oscillation
2SK508×4
D/A
DDS
SC-1287
Loop
filter
Amplifier
2SC4081
Phase
comparison
DDS
Data control
SC-1246A
DDS (3rd Lo)
Band pass
filter
D/A
Amplifier
2SC4081
f1(MHz)
82.523– 82.623
85.455– 85.905
89.345– 89.445
92.455– 94.155
114.455–118.455
* Frequency range varies depending on version.
Band
1.9
3
7
10
14
* Frequency range varies depending on version.
Loop
filter
Buffer
amplifier
2SC4403
Shock-absorbing
amplifier
vPC4570 1/2
Power
amplifier
2SC5125×2
Final stage voltage: 13.0V(13.8V)
Driving
amplifier
2SC1972×2
Band Frequency range (MHz) Band Frequency range (MHz)
1.9
18
18.068–18.168
1.800– 2.000
3
21
21.000–21.450
3.500– 3.999
7
24
24.890–24.990
7.000– 7.300
10
28
28.000–29.700
10.100–10.150
14
50
50.000–54.000
14.000–14.350
Pre-amplifier
2SC1971
PLL IC
LMX2301
Band pass
filter
32MHz
Reference
oscillator
2SC4403
32MHz
Buffer
amplifier
2SC4081
Band pass
filter
f3 (3rd Lo)
492.500kHz
489.500kHz
491.000kHz
488.705kHz *
491.000kHz
491.000kHz
AF
amplifier
µPC4570 1/2
Low-pass
filter
µPC4574
double multiplier
2SC4081
2SC4405
U S B
L S B
C
W
RTTY
A
M
F
M
f2(2nd Lo)
64.0000MHz
f1(1st Lo)
Low-pass
filter
POWER SET
H F : R507
50M : R509
A M : R510
Amplification
µPC1678
Power control
NJM4558
filter
High-pass
Band pass
filter
DSP
ADSP-2106
QLKS-160
LEVEL CONV.
TC7SET08FU
D/A CONV.
AD1855JRS
Mixing circuit
NJM1496
IF
amplifier
2SK882
Band pass
filter
IF
amplifier
2SK882
2nd mixing circuit
HSB88WS
1st Lo amplifier
2SC4673
Amplifier
µPC2708
CW
KEYING
MAIN/SUB DIAL
RF POWER VR
SUB CPU
HD6433042
MAIN CPU
HD6432357
TUNER CPU
M38022M2
Antenna
tuner
POWER
SWR detection
HSM88AS×2
Low-pass
filter
Transmitter Block Diagram
21
5-10 Dual-watch function
The dual-watch function allows the designated receive frequency and
another frequency or the transmit/receive frequency of a DX station
(used for split operation) to be watched at the same time. Fitting the
transceiver with two receive circuits is one way of obtaining this dualwatch function. If a sub-receive circuit is used the performance is
liable to decrease compared with the receive performance of the
main receive circuit. The IC-756PROII has a dual-watch system
which exceeds those in conventional equipment. Here two sets of a
PLL circuit and 1st mixer are used for the dual-watch function. Both
sets are used when the first intermediate frequency is attained to
provide for dual watch. The ATT circuit has a PIN diode (used to
adjust the balance so that the weak signal is not masked) when the
difference in the levels of the signals received is increased right after
the output from the 1st mixer. The transceiver is designed to receive
these two signals properly by operating the balance adjustment knob
located on the front panel. The transceiver uses a gate earth buffer
amplifier before and after the mixer, with the FET having significant
reverse isolation, so that the oscillation signal of the 1st stations (2
sets) will not be mixed with each other. The receive characteristics of
this system when the main receive circuit receives a signal is the
same as when the sub-receive circuit receives a signal. This makes it
possible to validate the noise reduction, noise blanker, etc. even
when a signal is received by the sub-receive circuit.
5-11 Real-time spectrum scope
Comparison of characteristics of spectrum scope
The receive system circuit is separate from the real-time spectrum
scope in the IC-756PROII. The circuit dedicated to the spectrum
scope is used to enhance its accuracy. This makes it possible to use
an attenuator dedicated to the spectrum scope, and to reflect the
desired signal clearly without the band scope being saturated when
the attenuator is turned on, even while receiving a low-level signal
with a high noise floor.
IC-756PROII 14.1M,P.AMP1
IC-756PROII 50.1M,P.AMP2
IC-756 14.1M P.AMP1
6
Scale of scope
5
4
3
2
1
0
–40
–20
0
20
40
60
80
100
ANT input level (dBµV)
Spectrum scope block diagram
Description of circuit
The signal from the 1st mixer (while receiving) or the mixer in the RFA unit (while transmitting) is passed through the PIN attenuator
(D801) and amplified at Q811 and Q812, and applied to the D831
mixer. The D831 converts this signal to the 13MHz band using the
2nd mixer. The converted signal passes through the BPF, which is
composed of two ceramic filters to suppress unwanted signals. The
signal then enters IC841. This IC is designed for FM IF and has an
22
algorithmic output RSSI terminal and MIX, and is operated by
sweeping the LO input to this point. The FI842 filter determines the
resolution of the spectrum scope, using a ceramic filter in CW mode,
to assure stable performance without need for adjustment. The RSSI
voltage output from IC841 is amplified by IC871 to provide both a
scope voltage and to apply the AGC to Q811 and Q812, to extend
the dynamic range of the spectrum scope.
5-12 Voice record/playback function
This radio uses a dedicated IC (ISD4003-04) for voice
recording/playback, and stores the analog signal as an analog value.
Usually an analog signal is digitized temporarily and stored as a
numerical value, to be converted back into an analog signal when it is
reproduced. With this method it is necessary to use expensive A/D
and D/A converters and storage media (RAM).
The IC-756PROII does not require these devices as it uses an IC
dedicated to voice recording/playback which provides full quality
audio reproduction. The previous IC-756PRO also used this method.
The storage chip in the IC-756PROII was changed to one with a
greater memory capacity to allow continuous recording capability.
5-13 PLL circuit
Since the IC-756PROII is equipped with a Dual-watch function, two
sets of PLL circuits with the same configuration are included. Unlike
the PLL circuits of other HF transceivers, no mixer is used. The mixer
is intended to create a sum or difference for the two signals to pick
out the desired frequency component. In fact the input signal as well
as the sum and difference are output for mixer output. For this
reason, it is necessary to arrange a filter for the mixer output. The
unwanted components required by the mixer are also spurious for
transmit/receive. For a system configuration in which reference
oscillation is controlled by the DDS (Direct Digital Synthesizer) to
output 10MHz, 10MHz is oscillated by the VCO of PLL on the basis of
the 10MHz generated by this DDS. The PLL oscillating the desired
frequency at 10MHz created by the VCO is controlled to oscillate the
VCO. In this case, it becomes unnecessary to arrange the mixer in
the transmit system.
This successful design concept, using high-speed DDS, was adopted
for the first time by the IC-775DSP.
Reference oscillator circuit
The reference oscillator circuit generates the frequency used as the
reference by all oscillation circuits concerned with transmit/receive
frequency. Thus the frequency accuracy depends on the accuracy of
this oscillation circuit. The oscillator used for the reference oscillation
circuit of the IC-756PROII provides the high accuracy of < –0.5ppm
1st Lo C/N characteristics of IC-756PROII
(0.5 × 10-6) when at temperatures between –30°C to +60°C. This
oscillator is a crystal oscillator called POC, in which the oscillator is
thermally balanced due to the heat generated in the posistor in the
oscillator, which does not allow the temperature change to occur in
the oscillator even if an external temperature change occurs. It is also
possible to adjust the deviation generated due to deterioration over
time.
Configuration of LO for split operation
The 1st transmit LO for split operation is generated by changing the
oscillation frequency of the PLL that generates the 1st receive LO.
With this configuration no transmit or receive signals will leak at the
receive frequency during split transmission.
VCO of PLL for 1st LO
Four VCOs cover the receive frequency range from 0.03MHz to
60MHz:
0.03–7.999MHz
VCO1
8–19.999MHz
VCO2
20–44.999MHz
VCO3
45–60MHz
VCO4
This VCO uses a HI-Q coil to minimize the noise generation, thus
assuring high C/N characteristics.
(C/N characteristics diagram)
1st Lo C/N characteristic of high-grade HF radio of a competitor
[dB] 0
[dB] 0
–10
–10
–20
–20
–30
–30
–40
–40
–50
–50
–60
–60
–70
–70
–80
–80
–90
–100
–10
–90
–8
–6
–4
–2
0
2
4
6
8
10
[kHz]
The above graphs show the 1st LO C/N characteristics for IC756PROII and the PLL of a high grade HF unit from another
manufacturer. The graph to the left indicates the LO C/N
characteristic for the IC-756PROII. While the difference seems to be
–100
–10
–8
–6
–4
–2
0
2
4
6
8
10
[kHz]
slight, the output of the 1st LO significantly affects the
transmit/receive performance. When the low-band signal in the HF
band is received, the difference will be apparent.
23
Other LOs
The 2nd LO works to double the output of the reference oscillator
circuit previously described, and the 3rd LO is obtained directly from
the DDS operating in accordance with the output of the 2nd LO
reference oscillator circuit. Since the PLL is not used for such
frequency components, high purity and stable operation is obtained.
Block diagram of PLL
24
6. Connection to option/peripheral units
6-1 ACC Sockets
ACC (1)
PIN No.
NAME
1
RTTY
Controls RTTY keying
2
GND
Connects to ground.
Connected in parallel with ACC (2) pin 2.
3
SEND
Inout/output pin.
Goes to ground when transmitting.
When grounded, transmits.
Ground level
: –0.5V to 0.80V
Output current
: Less than 200mA
Input current (Tx)
: Less than 200mA
Connected in parallel with ACC (2) pin 3.
4
MOD
Modulator input.
Connects to a modulator.
Input impedance
Input level
: 10kΩ
: Approx. 100mV rms
5
AF
AF detector output.
Fixed, regardless of [AF] position in default
settings.
Output impedance
Output level
: 4.7kΩ
: 100–300mV rms
6
SQLS
Squelch output.
Goes to ground when squelch opens.
SQL open
SQL closed
: Less than 0.3V/5mA
: More than 6.0V/100µA
7
13.8V
13.8V output when power is ON.
Output current
: Max. 1 A
Connected in parallel with ACC (2) pin 7.
8
ALC
ALC voltage input.
Control voltage
: –4V to 0V
Input impedance
: More than 10kΩ
Connected in parallel with ACC (2) pin 5.
PIN No.
NAME
2
1
5
3
8
6
7
Rear panel view
ACC (2)
1
7 pin
2
4
8V
2
GND
3
SEND
5
3
1
6
SPECIFICATIONS
“High” level
“Low” level
Output current
8 pin
4
DESCRIPTION
7
Rear panel view
4
BAND
5
ALC
6
TRV
7
13.8V
DESCRIPTION
: More than 2.4V
: Less than 0.6V
: Less than 2mA
SPECIFICATIONS
Output voltage
Output current
Regulated 8V output.
: 8V ± 0.3V
: Less than 10mA
Same as ACC (1) pin 2.
Same as ACC (1) pin 3.
Band voltage output.
(Varies with amateur band)
Output voltage
: 0 to 8.0V
Same as ACC (1) pin 8.
Activates [XVERT] input/output when “HIGH”
voltage is applied.
Input impedance
Input voltage
: More than 10kΩ
: 2 to 13.8V
Same as ACC (1) pin 7.
6-2 HF/50MHz, 1kW linear amplifier
Connection to IC-PW1 (option)
To antenna
Remote control cable attached to IC-PW1
ACC-1
ACC cable attached to IC-PW1
ANT
REMOTE
INPUT1
Coaxial cable attached to IC-PW1
ANT 2
ANT 1
ACC (2)
REMOTE
GND
GND
IC-PW1
AC outlet
Non Europe versions: 100–120/220–240V
European version: 230V
Ground
IC-756PROII
25
6-3 Interface for digital mode
To use a personal computer to operate the digital modes (SSTV,
PSK31, BAUDOT RTTY, etc.), it is necessary to install the following
interface.
The IC-756PROII is equipped with a digital IF filter that may narrow
the receive passband range to 50Hz making it possible to select and
receive only one station, even when it is used in PSK31 mode.
If a filter width of 500Hz or less is selected the receive passband filter
is activated to avoid interference while the transceiver receives SSBD (SSB data mode).
Refer to the instruction manual or help file contained in the 3rd party
software prior to use.
Example of interface for digital mode
(Not provided by Icom)
2kΩ : 2kΩ
10kΩ
ACC (1)
2
4
5
1 8 3
6
7
Shield cable
10kΩ
Connection to
LINE IN or MIC IN
of PC
Pin
No.
5
2kΩ : 2kΩ
Shield cable
Shield cable
Not connected
4
2
10kΩ
Connection to
SP OUT of
PC
3
10kΩ
1
2SC1815
Shield cable
E
C
Connection to COM port of PC
B
4.7kΩ*
1S1588
RTS
GND
The sections shown in squares are
required only when BAUDOT RTTY is
used in FSK (RTTY) mode. (Other
digital mode operations are not
required.)
Pin 4 of
Dsub-25
Pin 7 of
Dsub-9
Pin-7
Pin-5
Pin 2
Pin-3
2SC1815
E
C
B
4.7kΩ*
1S1588
*Resistace values may be required to change, depending on computer.
TXD
Shield cable
This circuit connects the input and output through transformers to prevent RF feedback and to isolate the
transceiver from the computer.
6-4 External control unit for voice memory keyer
When a properly constructed control circuit is connected to the
microphone connector, it is possible to control the transmission of the
CW memory keyer (M1 to M4) and DVR (T1 to T4).
This also makes it possible to transmit the memory keyer and voice
memory while displaying the scope.
Example of external control circuit
(Not provided by Icom.)
Connection diagram
Microphone connector
e
Pin
MIC
U/D
u
Pin
MIC
GND
S1
1.5kΩ
±5%
S2
1.5kΩ
±5%
S3
2.2kΩ
±5%
S4
4.7kΩ
±5%
External keypad
26
6-5 Installation of UT-102 optional Voice Synthesizer Unit
The UT-102 is capable of announcing S-meter level, frequency, and
operating mode in English (on Japanese). It is possible to select
voice speed (fast/slow).
Main unit
UT
-10
UT-102
J3502
27
2
7. CI-V control
7-1 Remote jack
A personal computer may be used to control the frequency, operating
mode, VFO/memory status, etc. via its serial port, using the Icom
Communication Interface V (CI-V).
Connection of computer
IC-756PROII
Power cable
(9-15 V DC)
When the optional CT-17 (CI-V level converter) is connected, it is
possible to control up to 4 Icom Transceivers Receivers with a
personal computer. A wide variety of 3rd party software applications
may be used to provide automated logging and control of your radio.
Personal computer
RS-232C cable
CI-V cable
It is possible to connect up to 4 computers.
7-2 Data format of CI-V
FE FE
q
E0
w
64
e
IC-756PROII to controller
Cn
r
Sc
t
Data area
y
FD
u
FE FE
E0
64
FA
code (fixed)
FD
End of message
(fixed)
(fixed)
OK code
FB
NG code
TransceiverÕs
64
default address
ControllerÕs
E0
default address
FE FE
Preamble
code (fixed)
End of message
number entry
BCD code data for
frequency or memory
(see command table)
Sub command number
Command number
(see the command table)
u
FD
ControllerÕs
y
Data area
default address
t
Sc
TransceiverÕs
r
Cn
default address
e
E0
Preamble
w
64
code (fixed)
q
FE FE
OK message to controller
code (fixed)
Controller to IC-756PROII
FD
NG message to controller
q Pre-amble synchronous code to insert the data at first.
The hexadecimal “FE” is transmitted twice.

w Reception address
 : The address of IC-756PROII is “64” (hexadecimal), and shows when the controller is set to “E0”.
e Transmission address 
r Command
: The controllable function is given by a 2-digit hexadecimal command.
t Sub-command
: A 2-digit hexadecimal command is used for supplementary command instructions
y Data area
: The area is used to set the frequency data, etc., and the length is variable, depending on the data.
u Post-amble
: This is a code indicating the end of a message, and is a hexadecimal “FD”.
28
7-3 List of commands
• Command table
Command
Sub command
00
01
–
Same as
command 06
–
–
–
–
00
01
02
03
04
05
07
08
–
B0
B1
C0
C1
D0
D1
–
0001–0101*1
02
03
04
05
06
07
08
09
0A
0B
0E
0F
10
11
–
–
–
00
01
02
03
12
13
22
23
A1–A7
B0
B1
D0
D3
00
01
00
01
02
03
04
05
06
07
08
00
06
12
18
Description
Send frequency data
Send mode data
Read band edge frequencies
Read operating frequency
Read operating mode
Set frequency data
Select LSB
Select USB
Select AM
Select CW
Select RTTY
Select FM
Select CW-R
Select RTTY-R
Select VFO mode
Exchange main and sub readouts
Equalize main and sub readouts
Turn the dualwatch OFF
Turn the dualwatch ON
Select main readout
Select sub readout
Select memory mode
Select memory channel
*1P1=0100, P2=0101
Memory write
Memory to VFO
Memory clear
Scan stop
Programmed/memory scan start
Programmed scan start
F scan start
Fine programmed scan start
Fine F scan start
Memory scan start
Select memory scan start
Set F scan span (A1=±5kHz,
A2=±10kHz, A3=±20kHz,
A4=±50kHz, A5=±100kHz,
A6=±500kHz, A7=±1MHz)
Set as non-select channel
Set as select channel
Set scan resume OFF
Set scan resume ON
Turn the split function OFF
Turn the split function ON
Select 10Hz (1Hz) tuning step
Select 100Hz tuning step
Select 1kHz tuning step
Select 5kHz tuning step
Select 9kHz tuning step
Select 10kHz tuning step
Select 12.5kHz tuning step
Select 20kHz tuning step
Select 25kHz tuning step
Attenuator OFF
Attenuator ON (6dB)
Attenuator ON (12dB)
Attenuator ON (18dB)
Command
Sub command
Description
12
00
01
13
00
01
02
01 + Level data
Select/read antenna selection
(00=ANT1, 01=ANT2 : Add 0 or 1 to
turn [RX ANT ] OFF or ON,
respectively.)
Announce with voice synthesizer
(00=all data; 01=frequency and
S-meter level; 02=receive mode )
[AF] level setting (0=max. CCW to
255=max. CW
[RF] level setting (0=max. CCW to
255=11 o’clock)
[SQL] level setting (0=11 o’clock to
255=max. CW
[NR] level setting (0=min. to 255=max.)
Inside [TWIN PBT] setting or IF shift
setting (0=max. CCW, 128=center,
255=max. CW)
Outside [TWIN PBT] setting (0=max.
CCW, 128=center, 255=max.CW)
[CW PITCH] setting (0=low pitch to
255=high pitch)
[RF POWER] setting (0=mini. to
255=max.)
[MIC GAIN] setting (0=mini. to
255=max.)
[KEY SPEED] setting (0=slow to
255=fast)
[NOTCH] setting (0=low freq. to
255=high freq.)
[COMP] setting (0=mini. to 255=max.)
[BK-IN DELAY] setting (0=short delay to
255=long delay)
[BAL] level setting (0=max. CCW,
128=center, 255=max. CW)
Read squelch condition
Read S-meter level
Preamp (0=OFF; 1=preamp 1;
2=preamp 2)
AGC selection (1=Fast; 2=Mid; 3=Slow)
Noise blanker (0=OFF; 1=ON)
Noise reduction (0=OFF; 1=ON)
Auto notch (0=OFF; 1=ON)
Repeater tone (0=OFF; 1=ON)
Tone squelch (0=OFF; 1=ON)
Speech compressor (0=OFF; 1=ON)
Monitor(0=OFF; 1=ON)
VOX function (0=OFF; 1=ON)
Break-in (0=OFF; 1=semi break-in;
2=full break-in)
Manual notch (0=OFF; 1=ON)
RTTY filter (0=OFF; 1=ON)
Read the transceiver ID
Send/read memory contents (see p. 31
for details)
Send/read band stacking register
contents (see p. 31 for details)
Send/read memory keyer contents (see
p. 31 for details)
Send/read the selected filter width
(0=50Hz to 40/31=3600/2700Hz)
14
02 + Level data
03 + Level data
06 + Level data
07 + Level data
08 + Level data
09 + Level data
0A + Level data
0B + Level data
0C + Level data
0D + Level data
0E + Level data
0F + Level data
10 + Level data
15
16
01
02
02
12
22
40
41
42
43
44
45
46
47
19
1A
48
49
00
00
01
02
03
29
• Command table (continued)
Command
Sub command
Description
Command
Sub command
Description
1A
04
Send/read the selected AGC time
constant (0=OFF, 1=0.1/0.3 sec. to
13=6.0/8.0 sec.)
Send/read SSB TX Tone (Bass) level
(0=min. to 10=max.)
Send/read SSB TX Tone (Treble) level
(0=min. to 10=max.)
Send/read MONITOR gain (0=min. to
255=max.)
Send/read CW side tone gain (0=min. to
255=max.)
Send/read CW side tone gain limit
(0=OFF, 1=ON)
Send/read beep gain (0=min. to
255=max.)
Send/read beep gain limit (0=OFF,
1=ON)
Send/read LCD contrast (0=0% to
255=100%)
Send/read LCD Backlight (0=0% to
255=100%)
Send/read LCD horizontal position (0=1
to 7=8)
Send/read switch backlight (0=1 to 7=8)
Send/read display type (0=A, 1=B, 2=C,
3=D, 4=E, 5=F, 6=G, 7=H)
Send/read display font (0=Basic1,
1=Basic2, 2=Pop, 3=7seg, 4=Italic1,
5=Italic2, 6=Classic)
Send/read memory name (0=OFF,
1=ON)
Send/read my call setting (10-character:
see p. 31)
Send/read current time (0000 to 2359)
Send/read power-ON timer set (0000 to
2359)
Send/read power-OFF period (5=5 min.
to 120=120 min. in 5 min. step)
Send/read calibration marker
(0=OFF, 1=ON)
Send/read confirmation beep
(0=OFF, 1=ON)
Send/read band edge beep
(0=OFF, 1=ON)
Send/read RF/SQL control set
(0=Auto, 1=SQL, 2=RF+SQL)
Send/read quick dualwatch set
(0=OFF, 1=ON)
Send/read quick split set
(0=OFF, 1=ON)
Send/read FM split offset (HF)
–4,000 to + 4,000MHz
(see p. 31 for details)
Send/read FM split offset (50MHz)
–4,000 to + 4,000MHz
(see p. 31 for details)
Send/read split lock set (0=OFF, 1=ON)
Send/read tuner auto start set
(0=OFF, 1=ON)
Send/read PTT tune set
(0=OFF, 1=ON)
Send/read antenna selection
(0=OFF, 1=Manual, 2=Auto)
1A
0531
Send/read RTTY mark frequency
(0=1275Hz, 1=1615Hz, 2=2125Hz)
Send/read RTTY shift width
(0=170Hz, 1=200Hz, 2=425Hz)
Send/read RTTY keying polarity
(0=Normal, 1=Reverse)
Send/read RTTY decode USOS
(0=OFF, 1=ON)
Send/read RTTY decode new line code
(0=CR, LF, CR+LF, 1=CR+LF)
Send/read speech language
(0=English, 1=Japanese)
Send/read speech speed
(0=slow, 1=fast)
Send/read S-level speech
(0=OFF, 1=ON)
Send/read memo pad numbers
(0=5 ch, 1=10 ch)
Send/read main dial auto TS
(0=OFF, 1=Low, 2=High)
Send/read mic. up/down speed
(0=Low, 1=High)
Send/read CI-V transceive set
(0=OFF, 1=ON)
Send/read CI-V 731 mode set
(0=OFF, 1=ON)
Send/read TX spectrum scope set
(0=OFF, 1=ON)
Send/read spectrum scope max. hold
set (0=OFF, 1=ON)
Send/read voice auto monitor set
(0=OFF, 1=ON)
Send/read cut number style
(0=Normal, 1=190→ANO,
2=190→ANT, 3=90→NO, 4=90→NT)
Send/read count up trigger channel
(1=M1, 2=M2, 3=M3, 4=M4)
Send/read present number
(1–9999)
Send/read CW keyer repeat time
(1=1 sec. to 60=60 sec.)
Send/read CW keyer dot/dash ratio
(28=1:1:2.8 to 45=1:1:4.5)
Send/read rise time (0=2 msec., 1=4
msec., 2=6 msec., 3=8 msec.)
Send/read paddle polarity
(0=Normal, 1=Reverse)
Send/read keyer type (0=Straight,
1=Bug-key, 2=ELEC-Key)
Send/read mic. up/down keyer set
(0=OFF, 1=ON)
Send/read scan speed (0=low, 1=high)
Send/read scan resume (0=OFF,
1=ON)
Send/read VOX gain (0=0% to
255=100%)
Send/read anti VOX gain (0=0% to
255=100%)
Send/read VOX delay (0=0.0 sec. to
20=2.0 sec.)
Send/read RTTY filter bandwidth
(0=250Hz, 1=300Hz, 2=350Hz,
3=500Hz, 4=1kHz)
0501
0502
0503
0504
0505
0506
0507
0508
0509
0510
0511
0512
0513
0514
0515
0516
0517
0518
0519
0520
0521
0522
0523
0524
0525
0526
0527
0528
0529
0530
30
0532
0533
0534
0535
0536
0537
0538
0539
0540
0541
0542
0543
0544
0545
0546
0547
0548
0549
0550
0551
0552
0553
0554
0555
0556
0557
0558
0559
0560
0561
• Command table (continued)
Command
Sub command
Description
1A
0562
Send/read twin peak filter (0=OFF,
1=ON)
Send/read timer functions (0=OFF,
1=ON)
Send/read DSP filter type
(0=SSB: sharp; CW: sharp,
1=SSB: sharp; CW: soft,
2=SSB: soft CW: sharp,
3=SSB: soft CW: soft)
Send/read quick RIT/ TX clear function
(0=OFF, 1=ON)
Send/read SSB/CW synchronous tuning
function (0=OFF, 1=ON)
Send/read CW normal side set
(0=LSB, 1=USB)
Send/read external keypad type
(0=OFF, 1=Keyer send, 2=Voice play
(Tx), 3=Auto)
Send/read NB level (0=0% to
255=100%)
Send/read DATA mode (0=OFF, 1=ON)
Send/read SSB transmit bandwidth
(0=Wide, 1=Middle, 2=Narrow)
Set repeater tone frequency
Set tone squelch tone frequency
Set the transceiver to receive or
transmit condition (0=Rx; 1=Tx)
0563
0564
0565
0566
0567
0568
0569
06
07
1B
00
01
00
1C
• To send/read memory contents
When sending or reading memory contents, additional code as
follows must be added to appoint the memory channel.
➥Additional code: 0000–0101 (0100=P1, 0101=P2)
• Band stacking register
To send or read desired band stacking register’s contents, combined
code of the frequency band and register codes as follows are used.
For example, when sending/reading the oldest contents in the 21
MHz band, the code “0703” is used.
• Channel code for memory keyer
To send or read the desired memory keyer contents, the channel and
character codes as follows are used.
• Channel code
Code
Channel number
01
M1
02
M2
03
M3
04
M4
• Character’s code
Character
ASCII code
0–9
30–39
Numerals
A–Z
41–5A
Alphabetical characters
a–z
61–7A
Alphabetical characters
space
20
Word space
/
2F
Symbol
?
3F
Symbol
,
2C
Symbol
.
∧
2E
Symbol
5E
e.g., to send BT, enter ∧4254
*
2A
Inserts contact number (can be used for 1
Description
channel only)
• Character’s code for my call
Character
ASCII code
0–9
30–39
Numerals
Description
A–Z
41–5A
Alphabetical characters
a–z
61–7A
Alphabetical characters
space
20
Word space
–
2D
Symbol
.
2E
Symbol
/
2F
Symbol
• FM split frequency (HF/50MHz) setting
The following data sequence is used when sending/reading the FM
split frequency setting.
• Frequency band code
03
7
16.900000–17.499999
04
10
19.900000–10.499999
05
14
13.900000–14.499999
06
18
17.900000–18.499999
07
21
20.900000–21.499999
08
24
24.400000–25.099999
09
28
28.000000–29.999999
10
50
50.000000–54.000000
11
GENE
Other than above
r
X
0
X
X
0
X
XX
Direction:
00=+direction
01=–direction
13.400000–14.099999
e
1MHz digit: 0–4
3.5
w
10MHz digit: 0 (fixed)
02
q
10kHz digit: 0–9
11.800000–11.999999
100kHz digit: 0–9
Frequency range (unit: MHz)
1.8
100Hz digit: 0 (fixed)
Frequency band
01
1kHz digit: 0–9
Code
• Register code
Code
Registered number
01
1 (latest)
02
2
03
3 (oldest)
31
8. Inside Views
Final Power amplifier
(2SC5125 × 2)
Fan control
circuit
PA unit
Drive amplifier
Fan
Filter unit
Common filter
Tuner unit
Antenna tuner
control unit
Current transformer
(current, voltage, etc.)
Antenna tuner CPU
C-MOS IC
BPF board
YGR amplifier
VCO-B circuit
Preamplifier
FM IF IC
VCO-A circuit
Ceramic filter for
scope IF
PLL unit
RF-A unit
Memory board
Voice synthesizer unit
UT-102 (option)
2nd IF filter
DSP-A board
3rd mixer
MAIN-A unit
32
9. Options
IC-PW1 HF/50MHz ALL BAND 1kW LINEAR AMPLIFIER
PS-125 DC POWER SUPPLY
Full-duty 1kW linear amplifier including an automatic antenna tuner. Has automatic tuning
and band selection capability. Full break-in (QSK) operation is possible. The
amplifier/power supply unit and the remote control unit are separated.
Light weight power supply.
• Output voltage: 13.8V DC
• Max. current drain: 25A
AH-4 HF/50 MHz AUTOMATIC
ANTENNA TUNER
HM-36 HAND MICROPHONE
Specially designed to tune a long wire
antenna for portable or mobile 3.5–54MHz
operation.
• Input power rating: 120W
AH-2b
ANTENNA ELEMENT
A 2.5 m long antenna
element for mobile
operation with the AH-4.
• Frequency coverage:
7–54MHz bands with
the AH-4
Hand microphone equipped with [UP]/
[DOWN] switches. Same as supplied.
SM-20 DESKTOP MICROPHONE
SP-20 EXTERNAL SPEAKER
SP-21 EXTERNAL SPEAKER
Unidirectional, electret microphone for
base station operation. Includes
[UP]/[DOWN] switches and a low cut
function.
4 audio filters; headphone jack; can
connect to 2 transceivers.
Designed for base station operation.
• Input impedance: 8Ω
• Max. input power: 5W
• Input impedance: 8Ω
• Max. input power: 5W
CT-17 CI-V LEVEL CONVERTER
UT-102 VOICE SYNTHESIZER UNIT
For remote transceiver control using a PC.
You can change frequencies, operating
mode, memory channels, etc.
Announces the receive frequency, mode
and S-meter level in a clear, electronicallygenerated voice, in English (or Japanese).
33
10. Specifications
GENERAL
RECEIVER
• Frequency coverage
U.S.A.
Rx
Tx
Europe
France
Italy
Spain
Rx
Tx
Tx/Rx
:
0.030–60.000*1
1.800– 2.000*1
3.500– 3.999
7.000– 7.300
10.100–10.150
14.000–14.350
18.068–18.168
21.000–21.450
24.890–24.990
28.000–29.700
50.000–54.000
0.030–60.000*1
1.800– 1.999
3.400– 4.099*1
6.900– 7.499*1
9.900–10.499*1
13.900–14.499*1
17.900–18.499*1
20.900–21.499*1
24.400–25.099*1
28.000–29.999*1
50.000–52.000
1.810– 1.850 (France)
1.830– 1.850 (Italy, Spain)
3.500– 3.800
7.000– 7.100
10.100–10.150
14.000–14.350
18.068–18.168
21.000–21.450
24.890–24.990
28.000–29.700
50.200–51.200 (France)
50.000–51.000 (Italy)
50.000–50.200 (Spain)
*1 Some freq. bands are not guaranteed.
• Mode
• Number of memory Ch.
• Antenna connector
• Temperature range
• Frequency stability
: USB, LSB, CW, RTTY, AM, FM
: 101 (99 regular, 2 scan edges)
: SO-239×2 and phono [RCA; (50Ω)]
: –10˚C to +50˚C; +14˚F to +122˚F
: Less than ±0.5ppm (From 1 minute after
power ON at 0˚C to 50˚C; +32˚F to +122˚F)
• Frequency resolution : 1Hz
• Power supply requirement : 13.8V DC ±15% (negative ground)
• Power consumption
: Tx
Max. power
23A
Rx
Standby
3.0A (typ.)
Max. audio
3.3A (typ.)
• Dimensions
: 340(W)×111(H)×285(D) mm;
(projections not included)
133⁄8(W)×43⁄8(H)×117⁄32(D) in
• Weight (approx.)
: 9.6kg; 21.2lb
• ACC 1 connector
: 8-pin DIN connector
• ACC 2 connector
: 7-pin DIN connector
• CI-V connector
: 2-conductor 3.5 (d) mm (1⁄8″)
• Display
: 5-inch (diagonal) TFT color LCD
TRANSCEIVER
• Output power
: SSB, CW, RTTY, FM
5–100W
(continuously adjustable) AM
5–40W
• Modulation system
: SSB
DPSN modulation
AM
Digital low power modulation
FM
Digital phase modulation
• Spurious emission
: 50dB (HF bands)
60dB (50MHz band)
• Carrier suppression
: More than 40dB
• Unwanted sideband suppression:
More than 55dB
• TX variable range
: ±9.999kHz
• Microphone connector : 8-pin connector (600Ω)
• ELE-KEY connector
: 3-conductor 6.35 (d) mm (1⁄4″)
• KEY connector
: 3-conductor 6.35 (d) mm (1⁄4″)
• SEND connector
: Phono (RCA)
• ALC connector
: Phono (RCA)
34
• Receive system
: Triple conversion superheterodyne system
• Intermediate frequencies : 1st
64.455MHz (for all modes)
2nd
455kHz (for all modes)
3rd
36kHz (for all modes)
• Sensitivity (typical)
:
SSB, CW, RTTY
0.16µV*1 (1.80–29.99MHz)
0.13µV*2 (50.0–54.0MHz)
(10dB S/N)
AM (10dB S/N)
13µV (0.5–1.799MHz)
2µV*1 (1.80–29.99MHz)
1µV (50.0–54.0MHz)
FM (12dB SINAD)
0.5µV*1 (28.0–29.9MHz)
0.32µV*2 (50.0MHz–54.0MHz)
*1Pre-amp 1 is ON, *2Pre-amp 2 is ON
• Squelch sensitivity (Pre-amp: OFF):
SSB, CW, RTTY
Less than 5.6µV
FM
Less than 1µV
• Selectivity (representative value):
SSB, RTTY
More than 2.4kHz/–6dB
(BW: 2.4kHz)
Less than 3.2kHz/–40dB
Less than 3.6kHz/–60dB
Less than 4.3kHz/–80dB
CW (BW: 500Hz)
More than 500Hz/–6dB
Less than 700Hz/–60dB
AM (BW: 6kHz)
More than 6.0kHz/–6dB
Less than 15.0kHz/–60dB
FM (BW: 15kHz)
More than 12.0kHz/–6dB
Less than 20.0kHz/–60dB
• Spurious and image
: More than 70dB
rejection ratio
(except IF through on 50MHz band)
• AF output power
: More than 2.0W at 10% distortion
(at 13.8V DC)
with an 8Ω load
• RIT variable range
: ±9.999kHz
• PHONES connector
: 2-pin connector 6.35 (d) mm (1⁄4″)
• EXT SP connector
: 2-pin connector 3.5 (d) mm (1⁄4″)/8Ω
ANTENNA TUNER
• Matching impedance range:
16.7–150Ω unbalanced*1 (HF bands)
20–125Ω unbalanced*2 (50MHz band)
*1Less than VSWR 3:1; *2Less than VSWR 2.5:1
• Min. operating input power: 8 W
• Tuning accuracy
: VSWR 1.5:1 or less
• Insertion loss
: Less than 1.0dB (after tuning)
Supplied accessories:
• Hand microphone, HM-36
• Spare fuses
• DC power cable
• CW key plug
The LCD display may have cosmetic imperfections that appear as small or dark spots. This
is not a malfunction or defect, but a normal characteristic of LCD displays. All trademarks are
the properties of their respective holders.
All stated specifications are subject to change without notice or
obligation.
11. Block diagram
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan
< Corporate Headquarters >
2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A.
Phone : (425) 454-8155 Fax : (425) 454-1509
URL : http://www.icomamerica.com
< Customer Service > Phone : (425) 454-7619
Glenwood Centre #150-6165 Highway 17,
Delta, B.C., V4K 5B8, Canada
Phone : (604) 952-4266 Fax : (604) 952-0090
URL : http://www.icomcanada.com
A.B.N. 88 006 092 575
290-294 Albert Street, Brunswick, Victoria, 3056, Australia
Phone : 03 9387 0666 Fax : 03 9387 0022
URL : http://www.icom.net.au
146A Harris Road, East Tamaki, Auckland, New Zealand
Phone : 09 274 4062
Fax : 09 274 4708
URL : http://www.icom.co.nz
Phone: 06 6793 5302
Fax: 06 6793 0013
URL: http://www.icom.co.jp/world/index.html
Communication Equipment
Himmelgeister Str. 100, D-40225 Düsseldorf, Germany
Phone : 0211 346047 Fax : 0211 333639
URL : http://www.icomeurope.com
6F No. 68, Sec. 1 Cheng-Teh Road,
Taipei, Taiwan, R.O.C.
Phone : (02) 2559 1899 Fax : (02) 2559 1874
URL : http://www.asia-icom.com
Crta. de Gracia a Manresa Km. 14,750
08190 Sant Cugat del Valles Barcelona, SPAIN
Phone : (93) 590 26 70 Fax : (93) 589 04 46
URL : http://www.icomspain.com
1305, Wanshang Plaza, Shijingshan Road,
Beijing, China
Phone : (010) 6866 6337 Fax : (010) 6866 3553
URL : http://www.bjicom.com
Count on us!
Your local distributor/dealer:
Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.
Phone : 01227 741741 Fax : 01227 741742
URL : http://www.icomuk.co.uk
Zac de la Plaine, 1, Rue Brindejonc des Moulinais
BP 5804, 31505 Toulouse Cedex, France
Phone : (33) 5 61 36 03 03 Fax : (33) 5 61 36 03 00
URL : http://www.icom-france.com
Certificate Number Q14190
Icom Inc. (Japan), is an ISO9001
certification acquired company.
03HK0080 @2003 Icom Inc.
Printed in Japan
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GLOSSARY
HAM RADIO TERMS
This is glossary contains general definitions of typical amateur radio terms. Not all of the definition listed may apply to
your specific model of radio. Consult the manufacture for further clarification of model-specific terms.
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A
ACC (ACCessory)
Adjacent-channel interference
When a receiver is tuned to a specific frequency and interference is received on a nearby frequency.
AF (Audio Frequency)
AFC (Automatic Frequency Control)
Automatically compensate frequency drift.
AFSK (Audio Frequency Shift Keying)
Antenna impedance
The impedance of an antenna at its resonance. Although an
antenna’s impedance fluctuates with the frequency of operation, an antenna should be 50 Ω for most transceivers.
AGC (Automatic Gain Control)
Automatically optimize receiver amplifier gain.
Antenna matching
When the antenna’s impedance at resonance is at optimum
performance for your transmitter output circuit.
ALC (Automatic Limiting Control)
Limits RF drive level to power amplifier during transmit to prevent distortion.
Antenna tuner
Device used to match an antenna to the output impedance
of a transmitter.
AM (Amplitude Modulation)
APC (Automatic Power Control)
Current limiting of power amplifier to prevent damage to finals in high SWR conditions.
AMSAT (AMateur SATellite)
AMTOR (AMateur Teleprinting Over Radio)
A form of RTTY, radio teletype.
1
Antenna ground system
Term used for a RF reference potential for some types of antennas. Most unbalanced or asymmetrical antennas need a
good RF ground.
ANF (Automatic Notch Filter)
APRS (Automatic Position Reporting System)
In conjunction with a GPS and TNC provide position reporting.
ANL (Automatic Noise Limiter)
Eliminates impulse and static noise peaks.
ARES (Amateur Radio Emergency Service)
ARES is a public-service organization of the ARRL.
ANT (ANTenna)
ARRL (The American Radio Relay League
The National Association for Amateur Radio in the US.
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B
ASCII (American National Standard Code for Information Interchange)
A seven-unit digital code for the transmission of teleprinter
data.
Backscatter
Form of ionosphere propagation via the E and F layers allowing stations to hear other stations within the skip
zones.
ATT (ATTenuator)
A network designed to reduce the amplitude of a signal.
Balun
A simple transformer used to change an unbalanced input
to a balanced output.
ATV (Amateur Television)
FSTV, SSTV
Auto patch
Used in repeater operation for telephone interconnect.
Average power
Power measured on standard power meter.
A
B
Band
A range of frequencies.
Bandwidth
Frequency needed for particular type of emission.
Bank
Memory bank
BCI (BroadCast Interference)
BFO (Beat Frequency Oscillator)
BNC (Bayonet Neill-Concelman)
A type of antenna connector
BPF (BandPass Filter)
Busy lockout
Inhibits transmit on a frequency in use
2
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C
Call sign
Sequence of letter and numbers used to identify amateur
radio operators and issued by the FCC.
CAP (Civil Air Patrol)
Volunteer affiliate of the United States Air Force.
Carrier
An unmodulated transmitted signal.
Carrier frequency offset (=Carrier Shift)
Distance between mark and space of the carrier for RTTY or
similar communications.
CBR (Cross Band Repeater)
A repeater which receive incoming signal and re-transmit it in
different bands— e.g. receives 144 MHz bands and re-transmits 430(440) MHz bands.
CCW (Counter ClockWise)
CH (CHannel)
Sequence of memory positions where frequency and related
information is stored.
CI-V
Icom computer Control Interface allows multiple radio control
simultaneously.
Conversion
Number of IF circuits in the receiver.
CPU (Central Processing Unit)
3
CQ
Radio communications term used to call others.
CTCSS (Continuous Tone Coded Squelch System)
Adds a continuous sub-audible low frequency tone to the
transmitted carrier. Receivers set for the same low frequency
tone can decode signal.
CW
1) Carrier Wave
2) ClockWise
CW filter
Used to narrow IF passband to improve reception in crowded
band conditions.
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D
Data communications
Transfer of data between two or more locations.
Downlink (↔Uplink)
Frequency that repeater or satellite transmits on to a user.
dBd
Unit of RF power as compared to a dipole antenna.
DSP (Digital Signal Processor)
Used to improve the signal to noise ratio for clearer and more
legible communications. Relatively new to the ham radio.
dBi
Unit of RF power as compared to an isotropic antenna.
dBm
Decibels measure, 1 mW with a load impedance of 600 Ω (0
dBm=1 mW).
DC (Direct Current)
DC ground
A connection point directly to chassis or battery ground to
prevent build-up of hazardous DC voltages.
Deviation
A measurement for a FM signals for the maximum carrier frequency changes either side of the carrier frequency.
Distress call
Signals a life-threatening situation. Most commonly referred
to as an SOS or MAYDAY call.
Distress frequency
A frequency or channel specific for use in distress calling. Radiotelephone distress frequencies are 2.182 MHz and 156.8
MHz. Survival craft use 243 MHz. Maritime distress frequencies are the same, while general aviation frequencies are
121.5 MHz.
C
D
DTCS (Digital Tone Coded Squelch)
A Selective call system
DTMF (Dual Tone Multi-Frequency (=touch-tone))
Used for transmit/receive numeric information such as phone
number, PIN, remote radio control commands etc.
Dualwatch
Receiving two signals simultaneously.
Dummy load
A non radiating 50 Ω load connected to the transmitter to replace the antenna for testing purposes.
Duplex
An operation mode in which the transmit and receive frequencies are different.
Duplexer
A device which divides transmit and receive signals.
Duty cycle
The ratios of transmit to receive time.
Dx’pedition
Trip to foreign land to “be DX.”
4
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E
EBS (Emergency Broadcast System)
A system where at first an attention tone is transmitted over
all station ad the second tone followed with specific instruction regarding the receivable frequency in the national emergency.
EEPROM (Electrically Erasable and Programmable Read Only
Memory)
Fading
Signal reduction due to atmospherics.
Filter
A circuit designed to pass only the desired frequency(s).
FM
1) Frequency Modulation
2) FM broadcast
EME (Earth-Moon-Earth)
Moon bounce communication.
FSK (Frequency Shift Keying)
EMI (Electro-Magnetic Interference)
Often called RFI (Radio-Frequency Interference).
FSTV (Fast Scan TV)
Graphics (and audio) communication using TV broadcast signals, requires a wide bandwidth.
Emission
Transmission of a signal
Encryption
Transmitting cryptic form so that only certain people understand what has been sent.
5
F
Full duplex
An operation mode, which transmits and receives on different frequencies at the same time, as a telephone communication.
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G
H
Ground Plane
A type of Omni-directional antenna
Harmonic
Multiple of a fundamental frequency.
Ground Wave
Electrical wave directly travelling from transmitter.
HF (High Frequency)
3–30 MHz range signals. (Normally, 1.9 MHz band also included.)
Grounding
Electrical connection to the earth.
HPF (High Pass Filter)
Hz (Hertz)
E
F
G
H
6
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I
IC (Integrated Circuit)
IF (Intermediate Frequency)
Internally converted frequency for amplification and other signal processing.
IF shift
A function that electronically shifts IF frequency from a center
frequency.
IMD (Inter-Modulation Distortion)
Distortion within RF circuits made with upper and lower adjacent channel signals.
7
L
LF (Low Frequency)
30–300 kHz range signals.
Li-Ion (Lithium Ion)
Rechargeable battery which has better capacity than Ni-Cd,
Ni-MH, etc., no memory effect after repeated non-full
charge/discharge cycles.
LPF (Low Pass Filter)
LSB (Lower Side Band)
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M
MARS (Military Affiliate Radio Service)
Memory bank
A set of memory channels organized into a group.
Memory effect
Rechargeable batteries such as Ni-Cd and Ni-MH types may
be temporality getting less capacity as a result of repeated
non-full charge/discharge cycles. It is called so since
rechargeable batteries lose capacity as if “memorize” wrong
full capacity level at less than full charge. Li-Ion batteries are
free from this effect.
MF (Medium Frequency)
300 kHz–3 MHz range signals
MIC (MICrophone)
Modulation
Method of adding information to a radio frequency carrier
N
NB (Noise Blanker)
A function reducing pulse-type noises.
NBFM (Narrow Band FM)
Ni-Cd (Nickel-Cadmium)
Ni-MH (Nickel-Metal Hydride)
Notch filter
Sharp and narrow rejection filter for elimination of interfering
signals
NR (Noise Reduction)
DSP feature reduces unwanted signal noise
I
L
M
N
8
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O
P
Offset frequency
Frequency difference between transmits and receives.
PA (Power Amplifier)
OSC (OSCillator)
PBT (PassBand Tuning)
A function electronically reduce interference by narrowing IF
bandwidth
Parawatch (=Dualwatch)
PEP (Peak Envelope Power)
RF power at maximum amplitude.
PLL (Phase Locked Loop)
Circuit to synthesize the different frequencies a radio will operate on.
Pocket beep
Beeping function when specific signal is received.
Priority watch
Reception mode, which by a selected frequency is always periodically, checked when VFO is set to different frequency
PTT (Push To Talk)
PWR (PoWeR)
9
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R
Reflected power
Non-radiated power dissipated as heat when the transmitter
is mismatched to the antenna or load.
Repeater
Radio systems, which receive incoming signal and re-transmit it for extended communication area. Normally put on geographically high locations for VHF/UHF hand portables.
RF (Radio Frequency)
RF ground
Connection of amateur equipment to earth ground to eliminate hazards from RF exposure and reduce RFI.
RFI (Radio Frequency Interference)
RIT (Receiver Incremental Tuning)
Fine-tuning receive frequency without changing displayed or
memory frequency.
RTTY (Radio TeleTYpe)
RX (Receive)
S
S/N (Signal to Noise ratio)
SAR (Search And Rescue )
Scan
Continually sweeping frequencies looking for signals.
Scan Edge
End and start frequencies for a scanning range.
Scratch Pad Memory
Temporary frequency memories for quick access.
Semi Duplex
An operation mode in which transmits and receives is accomplished on different frequencies alternatively.
Sensitivity
Indicates how weak a signal the receiver will pick up.
Set mode
An operation mode used for radio. To set less frequently used
control features.
Simplex
An operation mode where transmit and receive frequency is
same.
O
P
R
S
Skywarn
Trained volunteer storm spotters for the National Weather
Service.
SMA (Sub-Miniature a connector)
Type of antenna connector, used in VHF/UHF portable.
SP (SPeaker)
10
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T
Split
A mode in which the transmit and receive frequency is different.
SQL (SQueLch)
A function muting audio output for set conditions.
SSB (Single Side Band)
SSTV (Slow Scan TV)
Graphics communication using narrow bandwidth.
SWL (Short Wave Listener)
SWR (Standing Wave Ratio)
Measurement of forward vs. reflected power output during
transmit.
TCXO (Temperature Compensated Crystal Oscillator)
Heated crystal oscillator for better frequency stability.
TNC
1) Terminal Node Controller
Modem for data communication.
2) A type of antenna connector
TOT (Time Out Timer)
Time limiting function for continued repeater or other operations.
TS (Tuning Step)
Incremental steps
TSQL (Tone SQueLch)
Squelch function using subaudible tones, selective call.
TVI (TeleVision Interference)
TX (Transmit)
11
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U
UHF (Ultra High Frequency)
300 MHz–3 GHz range signals.
Uplink (↔Downlink)
Frequency that user transmits to the repeater or satellite.
V
VFO (Variable Frequency Oscillator)
An operation mode in which operator can change frequency
freely.
USB (Upper Side Band)
VHF (Very High Frequency)
30–300 MHz range signals.
UTC (Universal Time Coordinated)
An astronomical time based on the Greenwich meridian (zero
degrees longitude).
VOX (Voice Operated transmission)
A function automatically put the transmitter in transmit when
talk into a microphone.
VSC
1) Voice Scan Control
2) Voice Squelch Control
S
T
U
V
12
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W
Weather Alert
NOAA broadcast station transmitting alert signals.
WFM (Wideband FM)
13
Number/Others
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Number/Others
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W
14
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A-6156D-1EX
Printed in Japan
© 2002 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan
Icom America - Terms and Conditions
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