Pages 33-41
—
(B) Interfacing to Other Linear Amplifiers 10W, SOW, or 100W carrier for tuning purposes, independent of
the current operating mode (e.g. SSB). The Tuning Mode Power
T/R control can be accomplished either via the BAND DATA jack Adjustment parameter is set via Menu Item 4-3.
(for low voltage and low current, high-speed applications such as o
QSK CW), or via the TX GND jack. Other features assisting with * The maximum power output from the transceiver may be limited
to 10W or 50W, if desired, via Menu Item 4-0.
* ALC adjustment, when connected, is accomplished using the
appropriate adjustment potentiometer on the rear panel of the
linear amplifier.
ease of interfacing are:
If the amplifier has a particularly long receive-to-transmit
switching time, Menu Item 7-4 may be used to set a sequencing
delay anywhere in the range 0~30 ms, so as to avoid activation of | но
the FT-1000MP's ALC circuitry. When the transceiver's final Fig-14-1 TX-GND Circuit
amplifier protection sensor detects an incompletely-seated relay in Зе LIN SW Locus €
the amplifier, power output from the transceiver will be it Vall ОГ М ние
suppressed so as to protect both the amplifier and the transceiver; lo | we Mes
Menu Item 7-4 allows inhibition of the output for a few Pd Jr TR
milliseconds, to avoid the potential delay in generation of full nessa TÍ 77 01002
power output caused by the ALC recovery time constant. pe va |
If the linear amplifier uses vacuum tubes, or otherwise requires
manual tuning, a simple circuit can be constructed for connection GND © BAND
to the rear panel REMOTE jack, allowing the operator to send a
Fig.14-2 FL-7000 LINEAR AMPLIFIER CONNECTIONS
FT-1000MP
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ATT Switch ;
COFFE] "
OA, wy ©
| o > 7 E
E-767 (OPTION)
15. Transverter Interfacing
A dedicated transverter interconnection jack (RCA type) is A control line, available through the top-cover control panel,
provided on the rear panel for providing RF drive to an after- allows the final amplifier stage of the FT-1000MP to be disabled
market transmit converter. during transverter operation.
Receive converters may be connected to the RX IN RCA jack on
the rear panel, as well, so as to allow utilization of the 28-30 MHz Table 15-1 TRANSVERTER CONNECTION
band as a tunable IF for your converter. Via Menu Item 3-3, the 1
frequency display area of the LCD may be changed to show “50,”
“144,” or "430" (MHz) during transverter operation.
2
3
4
Fig.15-1 TRANSVERTER CONNECTIONS
HF
ANT
RF PWR
A/B RX
(С RF PWR = Maximum — >
En №57 VHF/UHF
ANT
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O
> (4)TX G ND
Nu
FT-1000MP IN | Ё
@RX ANT, TRV |eND
> EXT ALC (ER ©, MAA
e
nr В Т OUTPUT
If you need to connect,
16. Top Panel Access and Control
Underneath a small “trap door” access panel on the top cover are a
number of controls and switches that are rarely used during actual
operation, but which may require occasional adjustmant or re-
setting. These include:
(1) HP-M
This control sets the audio level available from the main receiver to
headphone jack A (3.5 mm plug).
(2) HPA-S
This control sets the audio level available from the sub receiver to
headphone jack A (3.5 mm plug).
(3) HPB-M
This control sets the audio level available from the main receiver to
headphone jack B (1/4 inch plug).
(4) HPB-S
This control sets the audio level available from the sub receiver to
headphone jack B (1/4 inch plug)
(5) CW
This control adjusts the tuning meter segmant indications for CW
Center Tuning.
(6) RTTY
This control adjusts the tuning meter segment indications for RTTY
Center Tuning.
(7) PKT
This control adjusts the tuning meter segment indications for PKT
Center Tuning.
(8) A-VOX (VOX Anti-Trip)
This control adjusts the level of negative feedback of receiver audio
to the microphone, to prevent the receiver audio from activating the
transmitter (via the microphone) during VOX operation.
(9) DLAY (VOX Delay)
This control sets the hang time of the VOX circuit, between the
moment you stop speaking and the moment the VOX circuit
automatically returns the transceiver to the “receive” mode.
(10) VOX
This control sets the sensitivity of the VOX circuit, to establish the
level of microphone audio needed to active transmitter.
(11) FM MIC
During FM operation, this control sets the microphone gain (and,
hence, the transmitter deviation).
(12) TVR (Transverter Enabling Switch)
During transverter operation, this switch disables the FT-1000MP’s
PA stage, conserving power and eliminating the need to connect a
dummy load to the HF Antenna jack(s) during VHF/UHF
operation.
Fig.16-1 TOP PANEL ACCESS and CONTROLS
© © © ® © o
æ ALC UNIT
N
Fig.16-2 PLUG/CONNECTOR PIN OUT DIAGRAMS
MIC
FAST
as viewed from front panel
BAND DATA
TX GND
BAND DATA A ND DATA B
GND
BAND DATA TX INHIBIT
BAND DATA C
as viewed from rear panel
DVS-2
VOICE OUT
+9V AR CNTL 1
VOICE IN \ y PTT
CNTL 2 NE GND
as viewed from rear panel
PACKET
DATA OUT
DATA IN
as viewed from rear panel
RTTY
|
RX AF OUT Ze NN TX (PTT)
SHIFT za GND
as viewed from rear panel
CT,
и
CAT JACK
GND N/A SI SO NA
as viewed from rear panel
KEY
Internal ad |
Keyer DOT / N НИИ
DASH COMMON
Electronic ~~
|
Keyer* KEY NC GND
PHONE
ON
MAIN SUB GND
pra
1/4" JACK (A)
*do not use 2-conductor type plug 3.5 mm JACK (B)
EXT SPKR AF OUT RCA PLUG
SIGNAL or (+)
CA] CA | a JF
7 | 7 IN A
SIGNAL GND MAIN SUB GND GND or (-)
17. Technical Glossary for the FT-1000MP
This section provides definitions and explanations of the
terminology frequently encountered during operation of the
FT-1000MP.
[A]
A/B Antenna Switch
This switch allows the operator to select from the two available
transceive antenna jacks.
ASB Key
Pushing this key swaps the contents of the Main and Sub VFO
registers.
ADB Key
Pushing this key copies the contents of the Main VFO register into
the Sub VFO register.
AC Receptacle
This three-pin jack accepts AC power input. Voltages in the range
100~117 V and 200~234 V may be accommodated.
ADC (Analog-to-Digital Converter)
Digital signal processing, and certain other signal manipulation
circuits, require that an analog signal be converted to digital form.
The ADC is a conversion circuit which breaks up the analog signal
into extremely fine segments, assigns a numerical value to each
point on the signal according to its characteristics, and then feeds
this data stream to the processing circuitry; the “desired”
numbers and “undesired” numbers are then kept or discarded by
software, according to the operational requirements of the moment.
AF OUT Jack
This 3.5 mm stereo jack on the rear panel provides fixed-level
audio output for connection to a recording or decoding device such
as a WeatherFax demodulator, or to a stereo amplifier. Peak signal
level 1s 200 mV (rms) at an impedance of 6000. Main receiver
audio is provided on the Tip connector, and Sub receiver audio is
provided on the Ring connector.
AF REV Key
Pressing this key reverses the relationship of the Main and Sub
receiver audio as adjusted by the AF Gain control on the front panel.
AFSK (Audio Frequency-Shifted Keying)
AFSK operation is a common technique for generation of the tones
needed for digital mode operation. In AFSK operation, two audio
tones are supplied by a Terminal Node Controller (TNC) to an SSB
modulator, which amplifies them as though they were a voice
signal. In the FT-1000MP, AFSK operation 1s supported via the
“Packet” jack and the “PKT mode of operation. AFSK operation
can be easier to accomplish, especially for the neophyte digital
operator, because the TNC's decoder 1s aligned to match the
frequencies of its tone generator; therefore, if the operator's
computer is successfully copying another station, the chances are
good that a connection to that station will be easily possible. If the
transmit frequency-shifted tones are generated inside the
transceiver, the operator must be somewhat more watchful against
accidental programming of transmit frequency offsets.
AGC Switch
The Automatic Gain Control (AGC) system for the receiver
includes selectable receiver recovery times of Slow and Fast, with
the “Auto” position providing different automatic selections
depending on the mode. An “AGC Off” position is also
provided, although in most instances the AGC should be left on.
ALC System
The transmitter's Automatic Level Control (ALC) system provides
automatic control of the drive levels throughout the transmit chain,
so as to promote good linearity on SSB, prevent excessive current
consumption or RF output, protect the power amplifier from
excessive SWR, and it also provides important reflected-voltage
information which is used to control the action of the antenna
tuner. Metering of the ALC level is provided on the front panel.
AM Mode Key
Pushing this key activates the AM mode. Pushing this key twice
activates the Synchronous Detection mode on AM.
AMTOR
One of the most popular digital operating modes, AMTOR stands
for AMateur Teleprinting Over Radio, and is an error-correcting
mode of operation.
ADM
Pushing and holding in this key for 1/2 second writes the contents
of (Main) VFO-A into the currently-selected memory channel.
ATT (Attenuator) Switch
The Attenuator switch allows the operator to select receiver input
attenuation levels of 6 dB, 12 dB, or 18 dB (one S-Unit steps) in
situations where low noise figure is not needed.
Auto Notch Circuit
This popular feature of the EDSP automatically detects and nulls
out any carriers or other beat signals within the receiver audio
passband. Multiple beats can be eliminated using this circuit.
[B]
Back Up Switch
This switch, located on the rear panel, is used to turn the memory
back-up battery on or off. When the switch is in its normal “On”
position, memory contents and operational settings are preserved,
even though main AC or DC power is cut off.
BAND Keys
These keys on the front panel keypad provide one-touch band
change. Two VFO registers are provided for each band, allowing
the owner to store, for example, one SSB and one CW “favorite
frequency” on each band, if desired.
BAND DATA Jack
This eight-pin interlocking-type DIN connector is used for
interconnection to the Yaesu Model FL-7000 Linear Amplifier.
Automatic bandswitching information, T/R control, 13.5V DC,
and transmitter-inhibiting lines are provided via this jack.
BANDWIDTH Key Matrix
These keys allow operator selection of the desired combination of
8.215 MHz (2nd IF) and 455 kHz (3rd IF) receiver filters.
BAND-PASS Filters (RF)
The FT-1000MP receiver front end includes a bank of eleven
Band-Pass filters, which serve to protect the RF amplifier and 1st
mixer stages from strong out-of-band signals. These filters are
switched using PIN diodes on their inputs, so as to minimize 2nd-
order intermodulation problems.
BK-IN Switch
Pushing in this switch activates the CW full break-in feature.
[C]
Carrier Point
The “Carrier Point” is the precise frequency at which the carrier
is found in a signal's spectrum, even if it is suppressed (as in SSB
telephony). Adjustment of the carrier point relative to the center
frequency of an IF filter allows either high-frequency or low-
frequency components to be enhanced or suppressed, depending
on the mode of operation and the direction of the adjustment.
CAT Jack
The Computer Aided Transceiver (CAT) System, pioneered on
Yaesu's FT-980 over a decade ago, now provides for easy
interconnection directly to a serial cable from your personal
computer's communication port via the rear panel (male) DB-9
CAT connector. The built-in TTL-to-RS-232C level converter
eliminates the need for an external interface card. Serial
communication is at 4800 baud, and the FT-1000MP is supported
by most of the popular software packages available on the market
today.
CLAR (Clarifier) Control/Switches
Offset tuning from the current operating frequency 1s provided by
the Clarifier control and switches. An offset of up to 19.99 kHz
may be set via the rotary Clarifier control, and then the RX (RIT)
and/or TX (XIT) controls may be utilized to apply this offset to the
receive, transmit, or both frequencies.
C/N (Carrier-to-Noise) Ratio
This is a measure of an oscillator's noise spectrum performance,
used to evaluate the impact of the oscillator on a transmitter or
receiver's net system performance. A quiet oscillator, like those
used in the FT-1000MP, will have very, very low noise output
either side of the carrier frequency.
Collins® Mechanical Filters
Collins” Mechanical Filters are available in both 2.75 kHz and 500
Hz bandwidths for the FT-1000MP (the SSB filter is factory
stalled; the CW filters--one each for Main and Sub receivers--are
optional accessories). These 455 kHz filters utilize a new
manufacturing process, and they provide extremely high reliability
and stability, along with excellent signal reproduction
characteristics.
COMP (Compression) Metering
During SSB operation utilizing the RF Speech Processor, the
COMP scale on the meter indicates the Compression level in use.
Adjustment of the Compression level is accomplished using the
“PROC” (Processor) control on the front panel.
CPU (Central Processing Unit)
The CPU in the FT-1000MP is the main control and linking
center of the FT-1000MP. The M37702 Main processor and its
associated sub-processors and interface ICs allow an unprece-
dented degree of operating flexibility, memory capacity, and
frequency resolution thanks to the high computational speed (25
MHz) and low-overhead control software architecture.
CPU Reset
Resetting of the CPU clears all VFO, memory, and antenna tuner
memory settings to their factory defaults. To do this, turn off the
[POWER] switch, then push the [SUB], [29], and [ENT] keys and
hold all three in while turning the transceiver on.
Contour Control/Circuitry
The “Contour circuits in the receiver EDSP allow the operator to
select high-pass, low-pass, mid-band-cut, and band-pass responses by
appropriately rotating the Contour control on the front panel. The
equivalent function in the transmit mode is the Microphone Equalizer.
CTCSS (Continuous Tone-Controlled Squelch System)
A CTCSS Tone encoder is built into the FT-1000MP, allowing the
operator to use a subaudible tone for access to 29 MHz repeater
stations requiring such a tone. The CTCSS tone is automatically
activated when the [RPT] key is pressed.
CW Mode Key
Pushing this switch activates the CW mode. Pushing this switch a
second time places the transceiver in the “CW-Reverse” mode,
which utilizes LSB-side injection instead of the default USB-side
injection.
[D]
DC 13.5 Jack
This jack may be used for input of DC power, 1f AC power 1s
unavailable. If both AC and DC power are applied to the
transceiver, the external DC power source has priority and the
internal AC power supply is disengaged. DC power requirements
are 13.5 V at less than 20 Amps.
DDS (Direct Digital Synthesis)
Many of the important oscillator signals utilized in the FT-
1000MP are generated using a DDS method, which provides
extraordinarily fast lock-up time and low noise. The newly-
designed DDS circuitry utilized in the FT-1000MP incorporates a
24-bit data stream, not the usual 18 bit; this allows 64 times more
frequency resolution, thus providing the capability of tuning in
steps of 0.625 Hz.
DFCS (Duct Flow Cooling System)
This unique Yaesu design concept provides highly-efficient heat
transfer for the power amplifier, power supply, and antenna tuner
units, thanks to the large cross-flow fan and heat sink.
DOWN Key
Pushing this switch causes the operating frequency to be lowered
by 100 kHz (1 MHz when the [FAST] key is engaged), for quick
movement around a band.
DUAL Key
Pushing this key activates the Dual Receive feature of the FT-
1000MP, in which both the Main and Sub receivers are active at
the same time.
DVS-2 Jack
This jack allows connection of the DVS-2 Digital Voice Recorder,
a popular accessory among contest operators, which allows storage
and playback of repetitive messages often needed during
radiosport competitions.
Dynamic Range
The Dynamic Range of a receiver is a measure of its ability to
withstand input from strong signals without (A) generating
spurious signals of its own, or (B) shutting down due to blocking.
The two most commonly-encountered measures of Dynamic
Range are 2nd order dynamic range (where strong signals at f1 and
f2 combine to produce an intermodulation response at fim2 = {1 +
t2) and 3rd order Dynamic Range (where the intermodulation
response appears at fim3 = 2f2 - f1 or fim3 = 2f1 - 12).
[E]
EDSP (Enhanced Digital Signal Processing) Switch/Circuit
The front-panel [EDSP] switch activates the EDSP feature both on
transmit and receive, as enabled through any applicable Menu
settings. Utilizing the NEC® uPD77016 operating in a 16-bit
environment at a maximum clock speed of 66.666 MHz, the EDSP
system provides a wide variety of interference-fighting and signal-
customization selections for the owner.
EXT ALC Jack
This RCA-type female connector 1s provided for injection of
externally-generated, negative-going ALC voltage (typically, from
a linear amplifier). The control voltage range is 0 to -4 Volts DC.
EXT SPKR Jack
This jack is used to connect an external speaker to the transceiver.
The output is mixed (Main plus Sub Receivers), and the acceptable
impedance 15 4 - 16 Q.
[F]
FAST Key
Pushing this key increases the rate of change of frequency during
rotation of the Main Dial, scanning, or frequency-hopping using
the [UP] and [DOWN] keys.
FUSE Holder *NOT AVAILABLE IN EUROPE
This socket on the rear panel holds the AC line fuse (8 Amps for
100 ~ 117 V, 4 Amps for 200 ~ 234 V). Separate DC fuses are
provided in the (optional) DC cable.
[G]
Gain Balance
In many receivers, a byproduct of activating narrow-bandwidth
filters 1s a significant loss of signal strength, due to the additional
insertion loss of the narrow filters compared to standard 2.4 kHz
SSB filters. In the FT-1000MP, a combination of attenuators (for
low-loss elements) and amplifiers (for high-loss elements)
maintains essentially unity gain over the entire range of available
bandwidth selections, allowing the full benefit of improved signal-
to-noise ratio to be realized as the bandwidth is narrowed.
GND (Ground) Lug
This threaded lug is used for connection to an earth ground.
[H]
HPF (High-Pass Filter) Circuits
High-Pass Filter circuits are used to protect later stages from
strong signals which are lower in frequency than the current
operating frequency. In the case of the FT-1000MP, three HPFs
are provided, so as to roll off signals below the 80-, 40-, and 20-
meter amateur bands, the most crowded, high-signal environments
in the HF spectrum. Attenuation at half frequency is 36 dB or
better, and these filters use relay switching so as to utilize no IMD-
producing components (such as diodes) ahead of the protection
afforded by the HPFs. The result is a 2nd-order intermodulation
distortion intercept point typically better than +85 dBm.
[1]
IC
The “IC” indication on the front panel meter displays the current
( “I” ) being drawn by the collectors ( “C” ) of the final amplifier
stage.
IF (Intermediate Frequency) Circuits
A modern superheterodyne transceiver utilizes one or more
conversions to IFs, frequencies at which some task is to be
performed. For example, since it currently is not possible to build
a 250 Hz bandwidth frequency-agile CW filter that tunes the entire
HF spectrum, the RF signal in converted to one or more IFs, in
which the signal 1s passed through crystal or mechanical filters,
amplified, and (in the case of the FT-1000MP) subjected to digital
signal processing. .The IFs used in the FT-1000MP are 70.455
MHz, 8.215 MHz, 455 kHz, and 10.24 kHz (EDSP) for the Main
Receiver, and 47.21 MHz and 455 kHz for the Sub Receiver.
IF Filters
Pursuant to the above discussion, the FT-1000MP provides banks
of up to four 8-pole crystal filters in the 8.215 MHz IF, and as
many as five filters (crystal, ceramic, or Collins® Mechanical
Filters) in the 455 kHz IF.
IMD (Intermodulation Distortion)
A condition whereby two or more signals mix in a device so as to
produce a spurious response. Intermodulation can be a problem
both on transmit and receive, and the design team for the FT-
1000MP have taken special care to ensure high immunity from
intermodulation throughout the transceiver.
Intercept Point
In receiver design and evaluation, the concept of the “Intercept
Point” is an important aspect of concern to engineers. The
“Intercept Point” is an imaginary intersection point on a graph of
two intersecting lines: one line represents increasing signal
strengths of incoming signals, and the other line represents the
(more rapidly) increasing signal strength of intermodulation
signals. Where the input signals (typically two or more tones) and
the intermodulation signals theoretically become the same strength
is the “Intercept Point’ for the specific type of intermodulation
being evaluated, and a “higher” number clearly is “better.”
Because of gain compression in the RF and IF amplifiers, the
Intercept Point can never be observed in practice; the Intercept
Point is derived by extending the linear portions of the graphs of
input signals and intermodulation signal(s) until they intersect.
The Intercept Point may be quoted in terms of the “Input Intercept”
or the “Output Intercept.” The two terms are related to the extent
that the Output Intercept equals the Input Intercept plus the Gain
of the stage under test. Thus, it is possible to specify the Input
Intercept of a receiver system, but not a meaningful Output
Intercept, because the value of the latter term would depend on the
setting of the AF Gain (Volume) control.
IPO (Intercept Point Optimization)
By feeding the receiver first mixer directly, without any RF
preamplification, the Intercept Point performance will be
enhanced. Eliminating the RF preamplifier will, of course, degrade
the Noise Figure (and, hence, the sensitivity) of the receiver, but
on frequencies below about 10 MHz the RF preamplifiers may not
be necessary (depending on the user's location, antenna, etc.). The
potential improvement in Intercept performance 1s achieved due to
(1) the reduction in gain ahead of the first mixer, and (2) the
elimination of the RF preamplifier itself, which (since no amplifier
is “IMD-free” ) could contribute to degraded Intercept
performance under some conditions.
[K]
KEY Jacks
Two KEY jacks are provided, one each on the front and rear
panels, allowing connection of a 1/2 stereo plug for keyer paddle,
external electronic keyer, or straight CW key input. The “Key-UP”
voltage is +5 V DC, and the “Key-Down™ current is 0.5 mA. The
two jacks are connected in parallel, thereby allowing the user to
connect one jack to an external manual keyer and the other to a
computer-driven keying interface for use in conjunction with
contest logging software.
KEYER Switch
Pushing this switch activates the built-in Electronic Keyer circuit.
KEYPAD
The front panel keypad allows one-touch band change or direct
frequency entry for both the Main and Sub VFO registers.
[L]
LIN Switch
The rear panel LINear switch 1s used to activate or de-activate the
mechanical relay which is connected to the “TX GND” jack. If a
linear amplifier is utilized whose T/R relay control voltage is less
than about +40 V DC (at 300 mA or less), the relay may not be
needed (the transistor-based control line connected to the
“BAND DATA” jack may be used). For high-voltage relay
control situations, however, the “TX GND" jack may be used
once the “LIN” switchis set to the “On” position.
LOCK Switches
These switches, one each for the Main and Sub VFO dials, allow
the respective dial mechanisms to be fixed (electronically) on the
current frequency, so as to avoid accidental frequency change.
Pushing the Main Dial's [LOCK] key in and holding it in while
turning the Main Dial will activate the “Tracking” function, in
Which the Main and Sub VFOs are slaved (moving in tandem).
LSB Key
Pushing this key in activates the LSB mode. The green LED
associated with this mode key will also become illuminated during
RTTY or Packet operation if LSB-side operation is selected by the
user.
[M]
M DA Key
Pushing this key transfers the contents of the current memory
channel into the register for VFO-A, and simultaneously will
switch the transceiver from the memory mode to the VFO mode.
MAIN (AF Gain)
This control 1s used to adjust the volume level for audio produced
by the Main receiver.
MC13020
This is the product designator for the renowned Motorola® IC
which uses the C-QUAM method of AM detection. The FT-
1000MP uses this IC for both synchronous and envelope detection
of AM signals.
MCK Key
Pushing this key activates the “Memory Check” mode, a
“scratchpad” condition whereby the contents of the memory
channels may be inspected without actually changing the
transceiver's current operating frequency. The “Memory Check”
display replaces the Sub VFO frequency when this switch 1s
pressed.
MDS (Minimum Detectable Signal)
The MDS is a measure of the minimum signal that can be detected
by a receiver, and it is defined as the signal level which produces a
3 dB signal-to-noise ratio when compared to the zero-signal
condition. Thanks to the low-noise design techniques and EDSP
signal enhancement used in the FT-1000MP, MDS figures in the
CW mode of -148 dBm or better are obtainable, making this
transceiver particularly outstanding as a tunable IF for a VHF or
UHF receive converter.
Memory Mode
This mode of operation utilizes the 108 regular memory channels
plus the 5 QMB (Quick Memory Bank) memories to provide
instant recall of a previously-stored frequency. In the FT-1000MP,
frequency, mode, and bandwidth information are all stored at the
same time.
MEM GROUP Key
Pressing this key toggles memory operation from the “All
Channel” mode to the “Memory Group’ mode, the latter of
which allows more important memories to be segregated into up to
four groups, so they may be inspected more quickly.
M TUNE Mode
The memory system allows the operator freely to tune off of a
memory channel. This “M TUNE” (Memory Tune) mode turns
the memory mode into a pseudo-VFO mode, because the memory
channel can be retuned to any frequency within the range of the
transceiver; mode and bandwidth may also be changed, and a
retuned memory's contents may be Pressing the [ VFO/MEM] key
once during Memory Tuning causes the register to revert to the
original memorized frequency; another press of the [VFO/MEM]
key shifts the transceiver into the VFO mode.
MEM/VFO CH Control
This knob, in its default configuration, is used to select from
among the available memory channels. Through the Menu system,
however, it may be changed into a “VFO Channel” selector,
whereby the Main VFO will tune in user-defined steps (like 1 kHz
or 5 kHz) for quick frequency excursions.
MIC Jack
This eight-pin jack accepts microphone input, along with PTT
(Push To Talk) and scanning controls from the microphone. A +5
V line is also provided for powering the MD-100A8X Desk
Microphone.
MIC Knob
This control provides adjustment.of the microphone input level for
SSB and AM operation.
Microprocessor (uP)
See “CPU.”
MONTI Control and Switch
The MONItor feature utilizes the Sub Receiver to provide
monitoring of the actual RF signal as it is being transmitted. This
makes the Monitor ideal for making EDSP modulation or keying
waveform adjustments. The [MONI] key turns the feature on and
off, and the “MONI” knob adjusts the monitoring audio level.
MOX Switch
This switch, when pressed, activates the transmitter by closing the
PTT (Push To Talk) line to ground.
[N]
NB (Noise Blanker) Control
This knob adjusts the detection level of the noise blanker circuitry.
NB1 Key
This key activates the narrow-pulse noise blanker, for blanking
noises typically emanating from power lines, automotive ignition
systems, etc.
NB2
This key activates the wide-pulse noise blanker, for those pulses
emulating the width of the now-inactive “Woodpecker” over-the-
horizon radar.
Noise Figure
The Noise Figure of a circuit or system, expressed in dB, is the
amount of noise added by that circuit or system compared to the
noise generated by a 50 £2 resistor at room temperature.
Noise Floor
See “MDS.”
NR (Noise Reducer)
The EDSP Noise Reducer feature provides selection from among
four noise-reduction protocols in EDSP. The operator rotates the
“NR” control so as to find the setting that provides the best
reduction of noise; it is impossible to predict which setting will be
best, as the four settings represent different mathematical
algorithms, not “blanking level” settings.
[О]
Over-Sampling
In the world of digital signal processing, an analog signal in
converted into a digital signal by sampling the analog signal and
“slicing” it into tiny segments, or samples. Clearly, the smaller
(and, hence, more numerous) the samples, the better the resolution
and quality of signal reproduction. The degree of Over-Sampling
is one index of the digitizing resolution used, so as to gauge the
expected signal quality after processing is completed.
[P]
PACKET Jack
This five-pin DIN connector is used for AFSK data input, data
output, and PTT (Push To Talk) connections. This jack is active
when the “PKT” mode is engaged.
PATCH Jack
This RCA-type jack may be used as an auxiliary microphone
audio input port, or it may be used as an auxiliary AFSK data
Input port.
PHONES (A-B) Jacks
These front panel receptacles (3.5mm stereo and 1/2 stereo) may
be used for connection of headphones. When using stereo
headphones, the audio from the Main and Sub receivers may be
separated during Dual Receive operation, if desired.
PITCH Control
This control is used to adjust the pitch of the CW monitor note, the
CW carrier offset, and the center frequency of the receiver
passband in tandem, so as to allow the operator to center all
aspects of CW operation around his or her preferred center
frequency. Center frequencies anywhere from 300 Hz to 1050 Hz
may be selected in 50 Hz steps.
PKT Mode Selection Key
This key activates the “Packet” (AFSK) mode of operation.
Repeatedly pushing the [PKT] key allows alternate selection of the
“PKT/LSB” and “PKT/FM” modes of operation. An emulation
of “PKT/USB” can be set up utilizing the [USER] key, described
later.
PMS Memory Channels
These channels (P1 - P9) are used for the PMS (Programmable
Memory Scan) feature, by which the operator may define and store
upper and lower sub-band limits for scanning.
POWER Switch
This 1s the main On/Off switch for the transceiver.
PROC Switch
Pushing this switch activates the RF Speech PROCessor.
PROC Control
Rotating this control allows adjustment of the compression level
for the RF Speech PROCessor.
PTT (Push To Talk) Switch/Circuit
The PTT circuit, throughout the transceiver, 1s the overall
transmit/receive control line, When this line is grounded, the
transcelver 1s switched into the transmit mode; when the line is
released from ground, the transceiver reverts to the (default)
receive mode. The rear panel “PTT” RCA-type jack may be used
for connection of a footswitch for hands-free phone operation, or it
may be used for connection to a terminal unit's PTT line for T/R
control during data operation. À PTT switch is also found on all
Yaesu microphones specified for use with the FT-1000MP, and
7 Li
PTT input lines are also provided on “PACKET,” RTTY, and
“DVS-2” jacks.
[О]
QMB Channels
This 1s a specially-segregated memory bank of five channels
which are available for very-quick storage and recall.
QMB RCL Key
This key 1s used for recall of the QMB channels.
QMB STO Key
This key 1s used to write the contents from the Main VFO to the
Quick Memory Bank.
[R]
REMOTE Jack
This jack may be used for four different remote control functions,
utilizing the optional FH-1 Keypad or a home-built version. The
FH-1 may be used for controlling the built-in Contest Memory
Keyer, or to replicate front-panel functions.
RF AGC
The RF-stage AGC circuit utilizes PIN diodes, which have
excellent immunity from IMD as well as a wide control range for
attenuation.
RF Amplifiers (Receive)
Three RF preamplifiers are provided in the FT-1000MP: one is a
general purpose wideband preamp which utilizes four junction
FETs in a parallel, push-pull configuration; the two others are
specially “tuned” preamps, including a source-follower JFET
amplifier for the low bands and a dual-gate MOSFET amplifier for
the high bands. The RF Amplifiers are selected via the Menu
system, and they also may be bypassed, if desired, by pressing the
[IPO] (Intercept Point Optimization) key.
RF Gain Control
This control adjusts the gain of the RF and IF receiver stages, so as
to allow the operator to control the total receiver system gain or
the AGC threshold point precisely.
RF PWR Control
This control allows adjustment of the RF power output.
RPT Key
This key, when pushed, places the transceiver in the “Repeater”
mode of operation when on 29 MHz in the FM mode. The
“Repeater mode activates a repeater shift function as well as a
(subaudible) CTCSS tone generator.
RTTY Jack
This four-pin DIN connector is used for FSK data input, data
output, and PTT control connections. This jack is active when the
“RTTY” mode is engaged.
RTTY Mode Selection Key
Pressing this key activates the RTTY (Radio Teletype) mode
(FSK). By repeatedly pushing this key, alternating selection of the
“RTTY/LSB’ and “RTTY/USB” modes is provided.
RX ANT Jacks
These RCA-type connectors may be used for connection of a
dedicated receive-only antenna, for insertion of a special-purpose
filter or amplifier, or for connection of a VHF/UHF receive converter.
RX ANT Switch
This front-panel switch allows the operator to select the device
connected to the RX Antenna jacks on the rear panel. This switch
action affects both the Main and the Sub receivers.
RX LEDs
These green LEDs (Light-Emitting Diodes) provide a visual
indication of which receiver(s) are currently active. If both RX
LEDs are illuminated, this indicates that the transceiver is in the
Dual Receive mode.
[S]
SHIFT Control
This control is used for adjustment of the IF Shift circuitry, which
is frequently useful in combatting nearby interference.
E
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