Yaesu Musen 20165X40 User Manual
FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
FT-7800R Operating Manual
Introduction
The FT-7800R is a ruggedly-built, high quality Dual Band FM transceiver providing 50
Watts of power output on the 144 MHz Amateur band and 40 Watts on the 430 MHz
Amateur band.
The high power output of the FT-7800R is produced by its RD70HVF1 Power MOS FET
amplifier, with a direct-flow heat sink and thermostatically-controlled cooling fan
maintaining a safe temperature for the transceiver’s circuitry.
Featuring 1055 memory channels which enable storing Independent Transmit
Frequencies (“Odd Split”) and built-in CTCSS and DCS encoder/decoder circuits, the
FT-7800R includes provision for remote-head mounting, utilizing the optional YSK-
7800 Separation Kit, which allows installation evening the most compact of cars.
Additional features include a convenient access key for Vertex Standard’s WIRES
™
(Wide-Coverage Internet Repeater Enhancement System), a transmit Time-Out Timer
(TOT), Automatic Power-Off (APO), Automatic Repeater Shift (ARS), plus Yaesu’s
™
exclusive ARTS
move out of communications range with another ARTS
(Auto-Range Transponder System) which “beeps” the user when you
TM
equipped station. And an RF
squelch circuit allows the owner to set the squelch to open at a programmable setting of
the S-Meter, thus reducing guesswork in setting the squelch threshold.
We recommend that you read this manual in its entirety, so as to understand fully the
many features of your new FT-7800R transceiver.
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Vertex Standard Co., Ltd.
FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
Specifications
General
Frequency Range: RX: 108.000 - 520.000 MHz,
700.000 - 999.995 MHz (Cellular Blocked)
TX: 144.000 - 148.000 MHz,
430.000 - 450.000
Channel Steps: 5/10/12.5/15/20/25/50/100 kHz
Modes of Emission: F3E, F2D
Antenna Impedance: 50 Ω, unbalanced (Antenna Duplexer built-in)
Frequency Stability: ±5 ppm @ 14 °F to +140 °F (-10 °C to +60 °C)
Operating Temperature Range: -4 °F to +140 °F (-20 °C to +60 °C)
Supply Voltage: 13.8 VDC (±15 %), negative ground
Current Consumption (Approx.): RX: 0.5 A (Squelched)
TX: 8.5 A (144 MHz), 8.0 A (430 MHz)
Case Size (W x H x D): 140 x 41.5 x 168 mm (w/o knobs & connectors)
Weight (Approx.): 1 kg
Transmitter
Output Power: 50/20/10/5 W (144 MHz),
40/20/10/5 W (430 MHz)
Modulation Type: Variable Reactance
Maximum Deviation: ±5 kHz
Spurious Radiation: Better than -60 dB
Microphone Impedance: 2 kΩ
DATA Jack Impedance: 10 kΩ
Receiver
Circuit Type: Double-conversion superheterodyne
Intermediate Frequencies: 45.05 MHz/450 kHz (Main band),
Sensitivity (for 12dB SINAD): Better than 0.2 µV
Squelch Sensitivity: Better than 0.16 µV
Selectivity (-6dB/-60dB): 8 kHz/30 kHz
Maximum AF Output: 2 W @ 8 Ω for 5% THD
AF Output Impedance: 4-16 Ω
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FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
Specifications are subject to change without notice, and are guaranteed within the 144
and 430 MHz amateur bands only. Frequency ranges will vary according to transceiver
version; check with your dealer.
Accessories & Options
Supplied Accessories
Microphone MH-48A6J 1
Mobile Mounting Bracket MMB-36 1
DC Power Cord w/Fuse (T9021715) 1
Spare Fuse 15 A (Q0000081) 2
Operating Manual 1
Warranty Card 1
Optional Accessories
MH-48A6J DTMF Microphone*1
MH-42B6JS Hand Microphone*1
YSK-7800 Separation Kit
MEK-2 Microphone Extension Kit*2
MLS-100 High-Power External Speaker
FP-1023 AC Power Supply (25A: USA only)
FP-1030A AC Power Supply (30A)
CT-39A Packet Interface Cable
Availability of accessories may vary. Some accessories are supplied as standard per local
requirements, while others may be unavailable in some regions. Consult your Yaesu
dealer for details regarding these and any newly-available options Connection of any
non-Yaesu-approved accessory, should it cause damage, may void the Limited Warranty
on this apparatus.
*1: If you replace the microphone from the MH-48A6J to MH-42B6JS or vice versa,
change the setting of Menu #22 (MIC). See page ?? for details.
*2: When using the MH-48A6J or MH-42B6JS microphone in conjunction with the
MEK-2, in some cases, the programmable key (MH-48: [P1] through [P4], MH-42: [ACC],
[P], [P1], and [P2]) functions may operate erratically.
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FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
Installation
This chapter describes the installation procedure for integrating the FT-7800R into a
typical amateur radio station. It is presumed that you possess technical knowledge and
conceptual understanding consistent with your status as a licensed radio amateur.
Please take some extra time to make certain that the important safety and technical
requirements detailed in this chapter are followed closely.
Preliminary Inspection
Inspect the transceiver visually immediately upon opening the packing carton. Confirm
that all controls and switches work freely, and inspect the cabinet for any damage.
Gently shake the transceiver to verify that no internal components have been shaken
loose due to rough handling during shipping.
If any evidence of damage is discovered, document it thoroughly and contact the
shipping company (or your local dealer, if the unit was purchased over-the-counter) so
as to get instructions regarding the prompt resolution of the damage situation. Be
certain to save the shipping carton, especially if there are any punctures or other
evidence of damage incurred during shipping; if it is necessary to return the unit for
service or replacement, use the original packing materials but put the entire package
inside another packing carton, so as to preserve the evidence of shipping damage for
insurance purposes.
Installation Tips
To ensure long life of the components, be certain to provide adequate ventilation around
the cabinet of the FT-7800R.
Do not install the transceiver on top of another heat-generating device (such as a power
supply or amplifier), and do not place equipment, books, or papers on top of the FT-
7800R. Avoid heating vents and window locations that could expose the transceiver to
excessive direct sunlight, especially in hot climates. The FT-7800R should not be used in
an environment where the ambient temperature exceeds +140 °F (+60 °C).
Safety Information
The FT-7800R is an electrical apparatus, as well as a generator of RF (Radio Frequency)
energy, and you should exercise all safety precautions as are appropriate for this type of
device. These safety tips apply to any device installed in a well-designed amateur radio
station.
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Operating Manual
(!) Never allow unsupervised children to play in the vicinity of your transceiver or
antenna installation.
(!) Be certain to wrap any wire or cable splices thoroughly with insulating electrical tape,
to prevent short circuits.
(!) Do not route cables or wires through door jambs or other locations where, through
wear and tear, they may become frayed and shorted to ground or to each other.
(!) Do not stand in front of a directional antenna while you are transmitting into that
antenna. Do not install a directional antenna in any location where humans or pets may
be walking in the main directional lobe of the antenna’s radiation pattern.
(!) In mobile installations, it is preferable to mount your antenna on top of the roof of the
vehicle, if feasible, so as to utilize the car body as a counterpoise for the antenna and
raise the radiation pattern as far away from passengers as possible.
(!) During vehicular operation when stopped (in a parking lot, for example), make it a
practice to switch to Low power if there are people walking nearby.
(!) Never wear dual-earmuff headphones while driving a vehicle.
(!) Do not attempt to drive your vehicle while making a telephone call on an autopatch
using the DTMF microphone. Pull over to the side of the road, whether dialing
manually or using the auto-dial feature.
Antenna Considerations
The FT-7800R is designed for use with antennas presenting an impedance of near 50
Ohms at all operating frequencies. The antenna (or a 50 Ohm dummy load) should be
connected whenever the transceiver is turned on, to avoid damage that could otherwise
result if transmission occurs accidentally without an antenna.
Ensure that your antenna is designed to handle 50 Watts of transmitter power. Some
magnetic-mount mobile antennas, designed for use with hand-held transceivers, may
not be capable of withstanding this power level. Consult the antenna manufacturer’s
specification sheet for details.
Most all FM work is performed using vertical polarization. When installing a directional
antenna such as a Yagi or Cubical Quad, be certain to orient it so as to produce vertical
polarization, unless you are engaged in a special operating situation where horizontal
polarization is used. In the case of a Yagi antenna, orient the elements vertically for
vertical polarization; for a Cubical Quad, the feedpoint should be at the center of one of
the vertical sides of the driven element (or at a side corner, in the case of a diamond-
shaped Cubical Quad).
Note that this transceiver is designed with wide frequency coverage in the VHF/UHF
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IC ID: 511B-20165X40
Operating Manual
spectrum. For general listening, you may wish to have a broadband antenna such as a
discone available, as a directional antenna such as a Yagi will have degraded
performance outside the Amateur band for which it is designed.
Excellent reference texts and computer software are available for the design and
optimization of VHF and UHF antennas. Your dealer should be able to assist you with
all aspects of your antenna installation requirements.
Use high-quality 50 Ohm coaxial cable for the lead-in to your FT-7800R transceiver. All
efforts at providing an efficient antenna system will be wasted if poor quality, lossy
coaxial cable is used. Losses in coaxial lines increase as the frequency increases, so an
8-meter-long (25’) coaxial line with 1/2 dB of loss at 29 MHz may have a loss of 6 dB or
more at 446 MHz; choose your coaxial cable carefully based on the installation location
(mobile vs. base) and the overall length of the cable required (for very short runs of cable
in a mobile installation, the smaller, more flexible cable types may be acceptable).
For reference, the chart below shows approximate loss figures for typically-available
coaxial cables frequently used in VHF/UHF installations.
Loss in dB per 30 m (100 feet) for Selected 50-Ohm Coaxial Cables
(Assumes 50-ohm Input/Output Terminations)
Loss figures are approximate; consult cable manufacturers’s catalogs for complete
specifications.
In outdoor installations, be certain to weatherproof all connectors thoroughly, as water
entering a coaxial cable will cause losses to escalate rapidly, thus diminishing your
communications effectiveness. The use of the shortest possible length of the highest
quality coaxial cable that fits within your budget will ensure the best performance from
your FT-7800R.
Mobile Installation
The FT-7800R must only be installed in vehicles having a 13.8 Volt negative ground
electrical system. Mount the transceiver where the display, controls, and microphone
are easily accessible, using the supplied MMB-36 mounting bracket.
The transceiver may be installed in almost any location, but should not be positioned
near a heating vent nor anywhere where it might interfere with driving (either visually
or mechanically). Make sure to provide plenty of space on all sides of the transceiver so
that air can flow freely around the radio’s case. Refer to the diagrams showing proper
installation procedures.
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FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
Mobile Power Connections
To minimize voltage drop and avoid blowing the vehicle’s fuses, connect the supplied DC
power cable directly to the battery terminals. Do not attempt to defeat or bypass the DC
cable’s fuse - it is there to protect you, your transceiver, and your vehicle’s electrical
system.
Warning!
Never apply AC power to the power cable of the FT-7800R, nor DC voltage greater than
15.8 Volts. When replacing the fuse, only use a 15-A fast-blow type. Failure to observe
these safety precautions will void the Limited Warranty on this product.
Before connecting the transceiver, check the voltage at the battery terminals while
revving the engine. If the voltage exceeds 15 Volts, adjust the vehicle’s voltage
regulator before proceeding with installation.
Connect the RED power cable lead to the POSITIVE (+) battery terminal, and the
BLACK power cable lead to the NEGATIVE (–) terminal. If you need to extend the
power cable, use #12 AWG or larger insulated, stranded copper wire. Solder the
splice connections carefully, and wrap the connections thoroughly with insulating
electrical tape.
Before connecting the cable to the transceiver, verify the voltage and polarity of the
voltage at the transceiver end of the DC cable using a DC voltmeter. Now connect
the transceiver to the DC cable.
Mobile Speakers
The optional MLS-100 External Speaker includes its own swivel-type mounting bracket,
and is available from your Yaesu dealer.
Other external speakers may be used with the FT-7800R, if they present the specified
8-Ohm impedance and are capable of handling the 2 Watts of audio output supplied by
the FT-7800R.
Base Station Installation
The FT-7800R is ideal for base station use as well as in mobile installations. The FT-
7800R is specifically designed to integrate into your station easily, using the
information to follow as a reference.
AC Power Supplies
Operation of the FT-7800R from an AC line requires a power source capable of providing
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Operating Manual
at least 15 Amps continuously at 13.8 Volts DC. The FP-1023 and FP-1030A AC Power
Supplies are available from your Yaesu dealer to satisfy these requirements. Other
well-regulated power supplies may be used, as well, if they meet the above voltage and
current specifications.
Use the DC power cable supplied with your transceiver for making power connections to
the power supply. Connect the RED power cable lead to the POSITIVE (+) power supply
terminal, and connect the BLACK power cable lead to the NEGATIVE (
terminal.
–) power supply
Packet Radio Terminal Node Controller (TNC)
The FT-7800R provides a convenient rear-panel DATA jack for easy connections to your
TNC. This connector is a standard mini-DIN connector. A pre-wired connector and cable
assembly option, model CT-39A, is available from your local Yaesu dealer.
The FT-7800R’s DATA jack connections are optimized for the data transmission and
reception speed in use. In accordance with industry standards, the signal levels,
impedances, and bandwidths are significantly different on 9600 bps as opposed to 1200
bps. If your TNC does not provide multiple lines to accommodate such optimization, you
may still be able to utilize your TNC, if it is designed for multiple-radio use, by
connecting the TNC “Radio 1” port to the 1200 bps lines on the FT-7800R, and the
“Radio 2” port to the 9600 bps lines.
The pin connections of the Data connector are shown below.
Note that 9600 bps packet transmit-deviation adjustment is very critical to successful
operation, and can only be accomplished using a calibrated deviation meter (such as
that found on an FM Service Monitor used in a communications service center). In most
cases, the Packet Data Input level (set via a potentiometer inside the TNC) must be
adjusted to provide a deviation of ±2.75 kHz (±0.25 kHz). Check with your packet node’s
sysop if you have any questions about the appropriate deviation level for your network.
Note also that high throughput on 9600 bps frequently requires strong signals, so you
may wish to consider the use of a directional antenna such as a Yagi for communication
with high-speed packet nodes.
The setting of the 1200 bps Packet Data Input level is much less critical than it is at
9600 bps, and satisfactory adjustment to the optimum (±2.5 ~ ±3.5 kHz) deviation can
usually be done “by ear” by adjusting the TNC’s 1200 bps TX Audio Level potentiometer
so that the outgoing packets (as monitored on a separate VHF or UHF receiver) are
approximately the same level as (A) the DTMF tones or (B) the 1750 Hz Burst tone
produced using the microphone.
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FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
Finally, note that the Menu (“Set”) mode allows you to set the Packet data rate (1200 or
9600 bps) independently for each band. If you have trouble getting your FT-7800R to
respond correctly during packet operation, check to be certain that you do not have
Menu #26 (PKT.SPD) set to the wrong data rate.
You may activate the microphone input while operating on the packet mode via the
Menu #25 (PKT.MIC), if you desired.
Front Panel Controls & Switches
1. VOL Knob
This control adjusts the volume level of the receiver’s audio. Clockwise rotation
increases the audio level.
2. SQL Knob
This control sets the threshold level at which received signals (or noise) will open
the squelch. It should be advanced clockwise just to the point where the noise is
silenced (and the “BUSY” indicator on the display turns off), so as to provide the
best sensitivity to weak signals.
3. Hyper Memory Buttons ([1] ~ [5])
Press and hold in one of these buttons for 2 seconds to store the current total
configuration of the radio into a special “Hyper” memory bank.
Press the appropriate button momentarily to recall the desired “Hyper” memory.
4. [MHz(PRI)] Key
Press this key momentarily to allow tuning in 1-MHz steps on the VFO frequency
while operating on the VFO mode. In the Memory mode, press this key
momentarily to allow tuning in 10 channel steps on the memory channels.
Press and hold in this key for 1/2 second to activate the Priority Channel Scanning
(Dual Watch feature).
4. [TONE(HM/RV)] Key
Press this key momentarily to change the Tone Squelch mode: ENC (CTCSS
Encoder), ENC.DEC (CTCSS Tone Squelch), or DCS (DCS) operation.
Press and hold in this key for 1/2 second to reverse the transmit and receive
frequencies during split-frequency (i.e. “Repeater”) operation.
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5. [LOW(ACC)] Key
Press this key momentarily to select the transmitter power output level (“LOW,”
“MID2,” “MID1,” or “HIGH”).
Press and hold in this key for 1/2 second to recall the Weather Broadcast Channels.
You can program the alternate (press and hold in) function of this key to other
functions, if desired. See page ?? for details.
6. [BAND(SET)] Key
While operating on the VFO mode, press this key momentarily to toggle the
operating band as follows:
144 MHz Æ 250 MHz Æ 350 MHz Æ 430 MHz Æ 850 MHz Æ 144 MHz ......
In the Memory mode, press this key momentarily to activate the “Memory Tune”
function.
Press and hold in this key for 1/2 second to enter the Set (“Menu”) mode.
7. [V/M(MW)] Key
Press this key momentarily to switch the frequency control among the VFO,
Memory System, and Home channel.
Press and hold in this key for 1/2 second to transfer the VFO contents into a
Memory register.
8. [SCN(SEL)] Key
Press this key momentarily to activate the Scanner.
Press and hold in this key for 1/2 second to select the scan mode.
9. [S.SCH(ARTS)] Keys
Press this key momentarily to activate the Smart Search feature.
Press and hold in this key for 1/2 second to activate the ARTS feature.
10. DIAL knob
This 20-position detented rotary switch is the tuning dial for the transceiver. It is
used for most tuning, memory selection, and function setting tasks on the
transceiver.
11. PWR Switch
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Press and hold in this switch for 1/2 second to toggle the transceiver’s power on and
off.
12. [%] Key
Press this key momentarily to activate the Internet Connection Feature.
Press and hold in this key for 1/2 second to indicate the supply voltage for 2
seconds.
Side Panel Connection & Knob
1. MIC Jack (Right Side)
Connect the supplied microphone to this jack.
2. Front Panel Release Knob (Left Side)
Press this knob to unlock the front panel to detachable the front panel from the
transceiver’s main body for the separate operation (requires optional YSK-7800
separate kit).
Rear Panel Connections
4. Antenna Jack
Connect your antenna here, using a type-M (PL-259) plug and coaxial cable.
5. Cooling Fan
Rotate this cooling fan while the radio is occurred transmission and after 30
seconds when the radio is returning the receive mode from transmit mode.
When the RF power amplifier heatsink reaches high temperature, this cooling fan
rotate automatically even if the receive mode.
6. DATA Jack
This 6-pin mini-DIN connector provides simple interfacing to a packet Terminal
Node Controller (TNC) for 1200 bps or 9600 bps operation. The pin connections are
shown on page ??.
7. EXT SP Jack
This 2-conductor, 3.5-mm mini phone jack provides audio output for an optional
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Operating Manual
speaker. The optimum load impedance is 8 Ohms. Inserting a plug into this jack
disables the audio path to the transceiver’s internal speaker.
8. 13.8V DC Cable Pigtails w/Fuse
This is the DC power supply connection for the transceiver. Use the supplied DC
cable to connect this pigtail to the car battery or base station DC power supply
capable of at least 9 Amperes (continuous duty). Make certain that the Red lead
connects to the Positive (+) side of the power source, and that the Black lead
connects to the Negative (–) side of the power source.
MH-48A6J Microphone
1. PTT Switch
Press this switch to transmit, and release it to receive.
2. Keypad
These 16 keys generate DTMF tones during transmission.
In the receive mode, the numeric (0 - 9) keys can be used for direct frequency entry
and/or direct numeric recall of the Memory channels and the alphabet (A - D) keys
can be used for controls the transceiver, as follow:
Key Function
A Activate the Smart Search feature.
B Switch the Memory Channel display between the “Frequency” format and
“Alpha-numeric Tag” format.
C Disable the noise squelch action, allowing you to hear very weak signals
near the background noise level.
D Allow tuning in 1-MHz steps on the VFO frequency while operating on
the VFO mode. In the Memory mode, allow tuning in 10 channel steps on
the memory channels.
3. [P1]/[P2]/[P3]/[P4] Buttons
[P1] button:
This button replicate the functions of the front panel [BAND(SET)] key.
While operating on the VFO mode, press this button momentarily to toggle the
operating band as follows:
144 MHz Æ 250 MHz Æ 350 MHz Æ 430 MHz Æ 850 MHz Æ 144 MHz ......
In the Memory mode, press this button momentarily to activate the “Memory Tune”
function.
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Press and hold in this key for 1/2 second to enter the Set (“Menu”) mode.
[P2] button:
This button replicate the functions of the front panel [V/M(MW)] key.
Press this button momentarily to switch the frequency control among the VFO,
Memory System, and Home channel.
Press and hold in this button for 1/2 second to transfer the VFO contents into a
Memory register.
[P3] button:
This button replicate the functions of the front panel [TONE(REV)] key.
Press this button momentarily to change the Tone Squelch mode: ENC (CTCSS
Encoder), ENC.DEC (CTCSS Tone Squelch), or DCS (DCS) operation.
Press and hold in this key for 1/2 second to reverse the transmit and receive
frequencies during split-frequency (i.e. “Repeater”) operation.
[P4] button:
This button replicate the functions of the front panel [LOW(ACC)] key.
Press this button momentarily to select the transmitter power output level (“LOW,”
“MID2,” MID1,” or “HIGH”).
Press and hold in this key for 1/2 second to recall the Weather Broadcast Channels.
You can program the [P1], [P2], [P3], and [P4] buttons for other functions, if desired.
See page ?? for details.
4. LAMP Switch
This switch illuminates the Microphone keypad.
5. LOCK Switch
This switch locks out the Microphone buttons (except for the keypad and PTT
switch).
6. [UP]/[DWN] Button
Press (or hold in) either of these buttons to tune (or scan up or down) the operating
frequency or through the memory channels. In many ways, these buttons emulate
the function of the (rotary) DIAL knob.
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MH-42B6JS Microphone
The optional MH-42B6JS is similar to the MH-48A6J, but the MH-42B6JS does not
include a DTMF keypad and its illumination switch.
1. PTT Switch
Press this switch to transmit, and release it to receive.
2. [ACC]/[P]/[P1]/[P2] Buttons
[ACC] button:
This button replicate the functions of the front panel [BAND(SET)] key.
While operating on the VFO mode, press this button momentarily to toggle the
operating band as follows:
144 MHz Æ 250 MHz Æ 350 MHz Æ 430 MHz Æ 850 MHz Æ 144 MHz ......
In the Memory mode, press this button momentarily to activate the “Memory Tune”
function.
Press and hold in this key for 1/2 second to enter the Set (“Menu”) mode.
[P] button:
This button replicate the functions of the front panel [V/M(MW)] key.
Press this button momentarily to switch the frequency control among the VFO,
Memory System, and Home channel.
Press and hold in this button for 1/2 second to transfer the VFO contents into a
Memory register.
[P1] button:
This button replicate the functions of the front panel [TONE(REV)] key.
Press this button momentarily to change the Tone Squelch mode: ENC (CTCSS
Encoder), ENC.DEC (CTCSS Tone Squelch), or DCS (DCS) operation.
Press and hold in this key for 1/2 second to reverse the transmit and receive
frequencies during split-frequency (i.e. “Repeater”) operation.
[P2] button:
This button replicate the functions of the front panel [LOW(ACC)] key.
Press this button momentarily to select the transmitter power output level (“LOW,”
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“MID2,” MID1,” or “HIGH”).
Press and hold in this key for 1/2 second to recall the Weather Broadcast Channels.
You can program the [ACC], [P], [P1], and [P2] buttons for other functions, if
desired. See page ?? for details.
3. LOCK Switch
This switch locks out the Microphone buttons (except for the keypad and PTT
switch).
4. [UP]/[DWN] Button
Press (or hold in) either of these buttons to tune (or scan up or down) the operating
frequency or through the memory channels. In many ways, these buttons emulate
the function of the (rotary) DIAL knob.
Basic Operation
Hi! I’m R. F. Radio, and I’ll be helping you along as you learn the many features of the
FT-7800R. I know you’re anxious to get on the air, but I encourage you to read the
“Operation” section of this manual as thoroughly as possible, so you’ll get the most out
of this fantastic new transceiver. Now. . .let’s get operating!
Turning the Transceiver On and Off
1. To turn the transceiver on, press and hold in the PWR switch for 1/2 second.
When you turn on the FT-7800R, the current DC supply voltage is indicated on the
LCD for 2 seconds. After this interval, the display will switch its normal indication
of the operating frequency.
2. To turn the transceiver off, again press and hold in the PWR switch for 1/2 second.
Adjusting the Audio Volume Level and Squelch Setting
At first, set the SQL knob fully counter-clockwise. Now, you may rotate the VOL knob
clockwise to adjust the receiver volume for a comfortable listening level, using the
background noise as a reference.
To set the squelch, turn the SQL knob clockwise a slightly past the point where the
background noise is muted. This is the point of best sensitivity to weak signals, and we
recommend that you not rotate the SQL knob very much past the point where the
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background noise is just silenced.
A special “RF Squelch” feature is provided on this radio. This feature allows you to set
the squelch so that only signals exceeding a certain S-meter level will open the squelch.
See page ?? for details
Selecting the Operating Band
Press the [BAND(SET)] key to move the operating band:
144 MHz Æ 250 MHz Æ 350 MHz Æ 430 MHz Æ 850 MHz Æ 144 MHz ......
R.F. Says: You may select the operating band by pressing the microphone’s [P1] key.
Frequency Navigation
1) Tuning Dial
Rotating the DIAL knob allows tuning in the pre-programmed steps established for the
VFO frequency. Clockwise rotation of the DIAL knob causes the FT-7800R to be tuned
toward a higher frequency, while counter-clockwise rotation will lower the operating
frequency.
Press the [MHz(PRI)] key momentarily, then rotate the DIAL knob, to change the
frequency steps to 1 MHz per step. This feature is extremely useful for making rapid
frequency excursions over the wide tuning range of the FT-7800R.
2) Direct Keypad Frequency Entry (MH-48A6J Microphone)
The keypad of the MH-48A6J DTMF Microphone may be used for direct entry of the
operating frequency.
To enter a frequency from the MH-48A6J keypad, just press the numbered digits in the
proper sequence. There is no “Decimal point” key on the MH-48A6J keypad.
Examples: To enter 146.480 MHz, press [1] Æ [4] Æ [6] Æ [4] Æ [8] Æ [0]
To enter 433.000 MHz, press [4] Æ [3] Æ [3] Æ [0] Æ [0] Æ [0]
3) Scanning
From the VFO mode, press and hold the [SCAN(SEL)] key for 1/2 second, then rotate
the DIAL knob to select the bandwidth for the VFO scanner. Now, press the
[SCAN(SEL)] key momentarily to initiate scanning toward a higher frequency. The FT-
7800R will stop when it receives a signal strong enough to break through the squelch
threshold. The FT-7800R will then hold on that frequency according to the setting of the
“Resume” mode (Menu #36 (SCAN); see page ??). See page ?? for details regarding the
VFO Scan operation.
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Vertex Standard Co., Ltd.
FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
If you wish to reverse the direction of the scan (i.e. toward a lower frequency, instead of
a higher frequency), just rotate the DIAL knob one click in the counter-clockwise
direction while the FT-7800R is scanning. The scanning direction will be reversed. To
revert to scanning toward a higher frequency once more, rotate the DIAL knob one click
clockwise.
Press the [SCAN(SEL)] key again to cancel scanning.
R.F. Says: You may also initiate the scanner by pressing and holding in the
microphone’s [UP] or [DWN] key. However, in this case, the scanner cause to sweep
frequencies only on the current band. If you would like the scanner not to be restricted
to the current band, you may change Menu #46 (VFO.BND) to allow the scanner to hop
to the low edge of the next-highest band when the VFO frequency reaches the high end
of the current band (or vice- versa). See page ?? for details.
Transmission
To transmit, simply close the PTT (Push To Talk) switch on the microphone when the
frequency is clear. Hold the microphone approximately 25 mm (1”) from your mouth,
and speak into the microphone in a normal voice level. When your transmission is
complete, release the PTT switch: the transceiver will revert to the receive mode.
R.F. Says: When the RF power amplifier heatsink is reached to a factory preset
temperature, reduce the transmit power level to the “LOW” automatically to prevent
the over heating the radio. You leave transmit in this condition (“LOW” mode), the radio
return to the receive mode forcibly.
Changing the Transmitter Power Level
You can select from among a total of four transmit power levels on your FT-7800R.
To change the power level, press the [LOW(ACC)] key to select one of four power
settings. These power levels will be stored, in memory registers, at the time of memory
storage (see page ?? for details on Memory operation).
During transmission, the Bar Graph will deflect in the display, according to the power
output selected.
Advanced Operation
Lock Feature
In order to prevent accidental frequency change or inadvertent transmission, various
aspects of the FT-7800R’s keys may be locked out. The possible lockout combinations
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Vertex Standard Co., Ltd.
FCC ID: K6620165X40
IC ID: 511B-20165X40
Operating Manual
are:
KEY: Just the front panel keys are locked out
DIAL: Just the front panel DIAL is locked out
KY+DL: Both the DIAL and Keys are locked out
PTT: The PTT switch is locked (TX not possible)
KY+PTT: Both the keys and PTT switch are locked out
DL+PTT: Both the DIAL and PTT switch are locked out
ALL: All of the above are locked out
To lock out some or all of the keys:
1. Press and hold in the [BAND(SET)] key for 1/2 second to enter the Set mode.
2. Rotate the DIAL knob to select Menu #21 (LOCK).
3. Press the [BAND(SET)] key momentarily, then rotate the DIAL knob to choose
between one of the locking schemes as outline above.
4. When you have made your selection, press the [BAND(SET)] key momentarily to
save the new setting, then press and hold in the [BAND(SET)] key for 1/2 second to
exit to normal operation.
5. To unlock the panel switches and DIAL knobs, select “OFF” in step 3 above.
Keyboard Beeper
A key/button beeper provides useful audible feedback whenever a key/button is pressed.
If you want to turn the beep off:
1. Press and hold in the [BAND(SET)] key for 1/2 second to enter the Set mode.
2. Rotate the DIAL knob to select Menu #5 (KEY.BEP).
3. Press the [BAND(SET)] key momentarily, then rotate the DIAL knob to change the
setting to “OFF.”
4. Press the [BAND(SET)] key momentarily to save the new setting, then press and
hold in the [BAND(SET)] key for 1/2 second to exit to normal operation.
5. To back on again the beep, select “ON” in step 3 above.
Display Brightness
The FT-7800R display illumination has been specially engineered to provide high
visibility with minimal disruption of your “Night vision” while you are driving. The
brightness of the display is manually adjustable, using following procedure:
1. Press and hold in the [BAND(SET)] key for 1/2 second to enter the Set mode.
2. Rotate the DIAL knob to select Menu #11 (DIMMER).
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