IC-7400 Instruction Manual

IC-7400 Instruction Manual
2001 NEW
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Page I
QUICK REFERENCE GUIDE
■ Installation
1. Install a ground system for DC noise suppression
and RFI suppression
2. Install your DC power supply
3. Install lightning protection. This will help protect
more than your gear.
4. Install and connect an antenna system for the appropriate bands of operation
5. Connect other peripheral equipment. This includes
microphones, headsets, TNC, amplifiers and any
other equipment necessary to make your shack
complete.
1. Grounding your Shack
Although your radio will operate by connecting the DC
power supply and antenna, it is necessary to have a
good ground system in your shack. A ground connection is the electrical contact between the common point
of an electrical or electronic system and the earth.
A good earth ground is necessary to prevent electrical
shock, eliminate problems from RFI and DC noise.
With more electronic devices being used today, it is
also important to reduce RFI and EMI. Although you
may not see interference in your shack, without a
grounding system, your neighbors may experience interference. Even though many of these devices,
where they must accept interference from their surrounding environment, it is best to eliminate as much
of the possible interference from your shack.
If you do not have a grounding system for your shack,
depending on the location of your shack, basement or
ground floor, a good ground system can be as simple
as a couple of ground rods driven 2 to 2.5 meter into
the soil. When installing your IC-7400 to your grounding system, the shortest most direct connection is recommended.
NOTE: There are many publications covering
proper grounding techniques. Check with your local
dealer for more information and recommendations.
R WARNING!: NEVER ground station equipment or antennas to house gas lines. NEVER attach ground lines to plastic (pvc) pipe.
D Some Symptoms if inadequate grounding
a. Poor DC Ground
50/60 Hz hum on the audio either Rx or Tx without
the antenna connected.
If you feel a tingling sensation when you touch a
metal surface. Surfaces such as the cover of your
radio or power supply.
b. Poor RF Ground
While transmitting and you feel a tingling sensation
when you touch a metal surface. Surfaces such as
the cover of your radio or power supply.
While transmitting, you experience interference to
other electronic devices, such as the telephone,
television or stereo audio systems.
2. Installing your DC Power Supply
The DC power supply is a device used to convert
110/220 V AC, also know as Household current, to a
steady source of 13.8 V DC.
The perfect match to your IC-7400 is the PS-125. This
compact switching power supply is the matching
power supply for your IC-7400 with a current rating of
25 A continuous duty. This plug and play unit plugs
into the DC jack located on the rear of the radio.
PS-125
DC power
socket
Transceiver
• If you are not using the PS-125:
Connect the supplied DC power cable to the appropriate color coded terminals, then insert the DC connector into the DC jack located on the rear of the
radio. (The diagram below describes the connection with
OPC-639. OPC-025D has no filter box and GND cable.)
AC A DC power
outlet
supply*
I
Transceiver
Red Black
+ _
AC cable
DC power cable
Connect to an AC outlet using the supplied AC cable.
to DC power
socket
Supplied
*13.8 V; at least 23 A
30 A fuses DC power cable
continuous
NOTE: Although the power supply current requirement is quite low during receiving, this not the case
when you transmit. With many electrical devices in
the shack, it is very important to verify the electrical
circuit is not overloaded.
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QUICK REFERENCE GUIDE
3. Installing lightning protection
Although you may not live in an area with high occurrence for lightning storms, it is always wise to take
precautions for lightning or static discharges. Proper
lightning protection not only offers protection to the
ham gear, but the shack and most importantly the operator.
NOTE: There are many publications covering
proper lightning protection, check with your local
dealer for more information and recommendations.
4. Installing your antenna system
Whether your IC-7400 is your first radio or one of
many, one of your key elements in a great shack is
the antenna system. There are three connections on
the back of your IC-7400, two for HF and 6 m and one
for 2 m. If you are using one antenna for HF and 6 m,
for simplicity, connect the antenna coax to ANT 1.
ANTENNA 1, 2
[Example]: ANT1 for 1.8–18 MHz bands
ANT2 for 21–50 MHz bands
Antenna SWR
Each antenna is tuned for a specified frequency
range and SWR may be increased out-of-range.
When the SWR is higher than approx. 2.0:1, the
transceiver’s power drops to protect the final transistors. In this case, an antenna tuner is useful to
match the transceiver and antenna. Low SWR allows full power for transmitting even when using the
antenna tuner. The IC-7400 has an SWR meter to
monitor the antenna SWR continuously.
PL-259 CONNECTOR INSTALLATION EXAMPLE
q
30 mm
Coupling ring
w
10 mm (soft solder)
10 mm
Soft
solder
1–2 mm
e
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Strip the cable as
shown at left. Soft solder the center conductor.
solder solder
Slide the connector
body on and solder it.
144 MHz ANTENNA
Connect a VHF (60–144 MHz)
antenna; impedance: 50 Ω.
Your IC-7400 is equipped with an internal antenna
tuner (ATU) for operation on 160–6 m. This ATU is designed to work with an unbalanced 50 Ω feedline. The
purpose of the internal antenna tuner is to match the
impedance of your antenna system to as close to a
50 Ω load as possible. This ATU will not operate with
a long wire or ladder line (450 Ω or other balanced
feedlines). An external ATU such as the AH-4 would
be necessary for this kind of operation.
r
Screw the coupling
ring
onto
the
connector body.
30 mm ≈ 9⁄8 in 10 mm ≈ 3⁄8 in 1–2 mm ≈ 1⁄16 in
R WARNING: Although a mag mount antenna
works great on a vehicle, DO NOT use the IC-7400
with this type of antenna.
CAUTION: Although your IC-7400 has protection
to drop down power with a high SWR, this does not
completely protect the transceiver from transmission without an antenna. Make sure you have an
antenna connected whenever you transmit with
your radio.
NOTE: There are many publications covering
proper antennas and their installation, check with
your local dealer for more information and recommendations.
II
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Page 13
INSTALLATION AND CONNECTIONS
■ Unpacking
■ Antenna connection
After unpacking, immediately report any damage to the
delivering carrier or dealer. Keep the shipping cartons.
For radio communications, the antenna is of critical importance, along with output power and sensitivity. Select antenna(s), such as a well-matched 50 Ω antenna,
and feedline. 1.5:1 or better of Voltage Standing Wave
Ratio (VSWR) is recommended for your desired band.
Of course, the transmission line should be a coaxial
cable.
For a description and a diagram of accessory equipment included with the IC-7400, see ‘Supplied accessories’ on p. ii of this manual.
■ Selecting a location
Select a location for the transceiver that allows adequate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna elements, radios and other electromagnetic sources.
The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles depending on your operating conditions.
When using 1 antenna, use the [ANT1] connector.
CAUTION: Protect your transceiver from lightning
by using a lightning arrestor.
PL-259 CONNECTOR INSTALLATION EXAMPLE
q
30 mm
Coupling ring
10 mm (soft solder)
w
10 mm
Soft
solder
1–2 mm
Slide the connector
body on and solder it.
r
To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other problems, ground the transceiver through the GROUND
terminal on the rear panel.
For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible.
R WARNING: NEVER connect the [GND]
terminal to a gas or electric pipe, since the connection could cause an explosion or electric shock.
13
Strip the cable as
shown at left. Soft solder the center conductor.
solder solder
e
■ Grounding
Slide the coupling ring
down. Strip the cable
jacket and soft solder.
Screw the coupling
ring
onto
the
connector body.
30 mm ≈ 9⁄8 in 10 mm ≈ 3⁄8 in 1–2 mm ≈ 1⁄16 in
Antenna SWR
Each antenna is tuned for a specified frequency
range and SWR may be increased out-of-range.
When the SWR is higher than approx. 2.0:1, the
transceiver’s power drops to protect the final transistor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-7400 has an SWR meter to monitor
the antenna SWR continuously.
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INSTALLATION AND CONNECTIONS
2
■ Required connections
• Front panel
i7400
CW KEY
TUNER
TWIN PBT
HF/VHF TRANSCEIVER
1.8 1
ANT
3.5 2
7
3
POWER
F-INP
NR
4
14 5
21 7
24 8
28 9
SPLIT
GENE
50 0
144 ENT
A/B
10
NOTCH
TRANSMIT
18 6
MW
PBTC
V/M
PHONES
MP-W
ELEC-KEY
AF
XFC
RF/SQL
RIT
∂TX
CLEAR
RIT/∂TX
MIC
MIC GAIN
A straight key can be used
when the internal electronic
keyer is turned OFF in keyer
set mode. (p. 34)
TS
A/NOTCH
NR
(dot)
(com)
(dash)
MP-R
M-CL
M-CH
RF PWR
F1
F2
F3
F4
F5
MENU
SSB
CW/RTTY
AM/FM
FILTER
CW PITCH
KEY SPEED
P.AMP/ATT
NB
VOX/BK-IN
MONITOR
LOCK/
SPCH
CALL
MICROPHONES (p. 100)
HM-36
SM-20
(optional)
• Rear panel
144 MHz ANTENNA (pgs. 13, 74)
ANTENNA 1, 2 (pgs. 13, 74)
[Example]: ANT1 for 1.8–18 MHz bands
ANT2 for 21–50 MHz bands
Connect a VHF
(60–144 MHz)
antenna;
impedance: 50 Ω.
DC POWER SUPPLY
PS-125
(Optional)
STRAIGHT KEY
GROUND (p. 13)
Use the heaviest gauge wire or
strap available and make the
connection as short as possible.
(+)
(_)
Grounding prevents electrical
shocks, TVI and other problems.
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INSTALLATION AND CONNECTIONS
■ Advanced connections
• Front panel
i7400
TUNER
HEADPHONES
TWIN PBT
HF/VHF TRANSCEIVER
1.8 1
ANT
3.5 2
7
3
POWER
F-INP
NR
NOTCH
TRANSMIT
10 4
14 5
21 7
24 8
28 9
SPLIT
GENE
50 0
144 ENT
A /B
18 6
PBTC
MW
V/M
PHONES
MP-W
NR
ELEC-KEY
AF
TX
A/NOTCH
XFC
TS
MP-R
M-CL
M-CH
RX
LOCK
RF/SQL
RIT
∂TX
CLEAR
RIT/∂TX
MIC
MIC GAIN
RF PWR
F1
F2
F3
F4
F5
MENU
SSB
CW/RTTY
AM/FM
FILTER
CW PITCH
KEY SPEED
P.AMP/ATT
NB
VOX/BK-IN
MONITOR
CALL
LOCK/
SPCH
MIC
The AFSK modulation signal
can be input from [MIC]. (p. 77)
• Rear panel
AH-4 (p. 76)
AH-2b
ANTENNA 1, 2 (p. 17)
Connects a linear amplifier,
antenna selector, etc.
When using the AH-4, it must
be connected to the [ANT1]
connector.
[SEND], [ALC] (p. 17)
Used for connecting a
non-Icom linear amplifier.
[DATA] (p. 77)
ACC SOCKETS (pgs. 8, 77)
[REMOTE] (p. 94)
Used for computer control and transceive operation.
EXTERNAL SPEAKER (p. 100)
SP-21
(optional)
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INSTALLATION AND CONNECTIONS
■ Power supply connections
2
CAUTION: Before connecting the DC power
Use an optional DC power supply with a 25 A capacity
and above when operating the transceiver with AC
power. Refer to the diagrams below.
cable, check the following important items. Make
sure:
• The [POWER] switch is OFF.
• Output voltage of the power source is 12–15 V
when you use a non-Icom power supply.
• DC power cable polarity is correct.
: positive + terminal
: negative _ terminal
Red
Black
CONNECTING PS-125 DC POWER SUPPLY
PS-125
Transceiver
DC power
socket
Connect to an AC outlet
using the supplied AC cable.
DC power cable
CONNECTING A DC POWER SUPPLY
• Connecting with OPC-025D
• Connecting with OPC-639
to DC power
socket
Transceiver
to ground
terminal
to DC power
socket
A DC power supply
13.8 V
; at least 23 A
Transceiver
AC outlet
A DC power supply
Black Red
_
+
13.8 V
; at least 23 A
AC outlet
Black Red
_
+
Supplied
DC power cable
(OPC-639)
Supplied DC
power cable
(OPC-025D)
AC cable
AC cable
30 A fuses
30 A fuses
CONNECTING A VEHICLE BATTERY
NEVER connect to
a 24 V battery.
_ black
+ red
NOTE: Use terminals for
the cable connections.
Crimp
Grommet
12 V
battery
Solder
Supplied
DC power cable
NEVER connect to a battery without supplied DC
fuses, otherwise a fire hazard may occur.
16
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INSTALLATION AND CONNECTIONS
■ Linear amplifier connections (not usable in European countries)
CONNECTING THE IC-PW1
Use the [ANT1] connector when connecting a linear amplifier.
Remote control cable (supplied with the IC-PW1)
To an
antenna ACC(1)
ACC cable (supplied with the IC-PW1)
REMOTE
ANT
Coaxial cable
INPUT1
Be sure to connect the cable
to the 7-pin ACC(2) jack.
ACC(2)
EXCITER
1
1&2
REMOTE
(supplied with the IC-PW1)
ANT1
GND
GND
IC-PW1
AC outlet
Transceiver
Ground
(Non-European versions: 100—120/220—240 V
European version
: 230 V)
Turn OFF the transceiver’s antenna tuner while tuning the IC-PW1’s tuner.
CONNECTING A NON-ICOM LINEAR AMPLIFIER
50 Ω coaxial cable
To an
antenna
ANT1
Transceiver
RF OUTPUT
RF INPUT
ALC
SEND
ALC
Non-Icom linear amplifier
SEND
R WARNING:
Set the transceiver output power and linear amplifier ALC output level referring to the linear amplifier
instruction manual. Be sure the linear amplifier keying circuit control voltage is compatible with the IC746PRO, before connecting to [SEND] jack.
The ALC input level must be in the range 0 V to –4
V, and the transceiver does not accept positive voltage. Non-matched ALC and RF power settings
could cause a fire or ruin the linear amplifier.
The specifications for the SEND relay are 16 V/DC
0.5 A. If this level is exceeded, a large external
relay must be used.
■ External antenna tuner connection
CONNECTING THE AH-4
The AH-4 must be connected to [ANT1].
Long wire or optional AH-2b
Coaxial cable (from AH-4)
Transceiver
ANT1
Control cable
17
Ground
AH-4
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