|Yaesu FT-847 (FT84, FT 847) EXCEPTIONAL
INTERFERENCE REDUCTION FROM DSP FILTER
|Yaesu's renowned DSP
circuitry is led by the ultra-sharp Bandpass Filter feature, which utilises
the combined effects of independently-adjustable audio HPF (High-Pass-Filter)
and LPF (Low-Pass-Filter) elements to provide very steep skirt selectivity
and reduction of noise. In voice modes, the LPF may be adjusted to begin
cutting off frequencies between 1500-3000 Hz, while the HPF cutoff frequency
may be adjusted over the range 100 - 1600 Hz. On CW, the DSP BPF takes
the form of an Audio Peaking Filter, with minimum bandwidths of 400 Hz,
200 Hz, 100 Hz, and even 25 Hz available for EME (Moonbounce) or other
|Yaesu FT-847 (FT84, FT 847) IMPROVE
SIGNAL-TO-NOISE RATIO WITH DSP NOISE REDUCTION
|Building on the success
of the FT-1000MP and FT-920 DSP Noise Reduction systems, Yaesu's engineers
expanded their ambitious project to optimise two parameters in DSP noise
reduction technology-response time and feedback coefficient--to provide
the best DSP-based noise reduction system in the industry. After thousands
of hours of on-the-air measurements and circuit evaluations, the Yaesu
design team selected a total of 16 noise reduction parameters, so as to
provide the best degree of noise suppression consistent with low distortion
of the desired signal. This adaptive filter actually "form fits" itself
around the incoming signal, while rejecting random noise. providing you
with the best chance ever of pulling out those weak ones.
|Yaesu FT-847 (FT84, FT 847) FAST-ACTING
DSP AUTO NOTCH FILTER
|To eliminate one or more
interfering beat tomes from the receiver audio passband, the DSP Auto-Notch
Filter provides instantaneous sensing and notching of these tones. The
notch width is very narrow, yielding minimal distortion of desired voice
|Yaesu FT-847 (FT84, FT 847) OPTIONAL
COLLINS® Mechanical Filters for SSB and CW!
for their excellent frequency response, thermal stability, and low phase
distortion, Collins Mechanical Filters in 2-5 kHz and 500 Hz (-6 dB) bandwidths
are available as options for the Yaesu FT-847 (FT847, FT 847). The Collins SSB filter provides
a very "flat" passband response which faithfully reproduces both voice
and data signals (such as satellite PSK). The 500 Hz Collins 500 Hz filter
is ideal for CW or RTTY work, with Wide/Narrow selection available from
the front panel. Combined with the DSP audio filters, the Collins Mechanical
Filter options make the Yaesu FT-847 (FT847, FT 847) an outstanding performer on SSB, CW, or
* Flexible Operating Provisions
for the CW Operator!
CW flexibility is as essential on
VHF and UHF as it is on HF, and the Yaesu FT-847 (FT847, FT 847) provides a.wealth of tools for
outstanding CW performance. For EME and other very-weak-signal work, the
DSP bandwidth may be made as narrow as 25 Hz, with minimum bandwidths of
100 Hz, 200 Hz, or 400 Hz also available. An iambic electronic keyer, with
adjustable weighting, is provided along with semi-break-in T/R control.
Either USB or LSB-side injection may be used for CW reception, thanks to
the CW REVERSE feature. And the ultra-fine tuning steps (as small as 1/10th
of a Hz!) provide a tuning "feel" as smooth as that of an analogue VFO!
* SSB Excellence for Todays Active
Your Yaesu FT-847 (FT847, FT 847)'s "talk power" is enhanced
by the built-in RF clipping-type Speech Processor which increases average
SSB output by approximately 6 dB. And the transmitted IF passband frequency
may be adjusted via Menu, to match or enhance the frequency characteristics
of your voice pattern. Independent USB and LSB alignment Menus are provided;
use the SSB MONITOR feature to make precise adjustments.
* Data Capability for Every Operating
The rear panel of the Yaesu FT-847 (FT847, FT 847) includes
convenient interface jacks for Data mode operating. For AFSK, RTTY, 300
bps Packet, AMTOR, PSK, HSCW, etc-, the three-pin DATA IN/OUT jack also
supports "PTT" control in addition to AFSK input and output. For 1200/9600
bps VHF/UHF Packet, the PKT jack provides optimised input and output data
lines, plus PTT and squelch status lines. The DATA IN/OUT jack's "RX" connection
may also be used for interfacing to weather satellite, WeatherFax, or other
computer based specialised decoding software, as well as for tape recording
of incoming receiver audio.
|Yaesu FT-847 (FT84, FT 847) POPULAR
MEMORY AND SCANNING FEATURES
|More than two decades
after Yaesu's FT-227R was introduced as the world's first synthesised transceiver
with memory, the Yaesu FT-847 (FT847, FT 847) fortifies Yaesu's position as the leader in imaginative,
easy-to-use memory and scanning circuitry design.
The Yaesu FT-847 (FT847, FT 847) includes 78 regular memories,
plus upper/lower band scanning limit memories, a CALL channel, and a HOME
channel on each band. A two-channel Quick Memory Bank (QMB) allows instant
recall of urgent frequencies, and nineteen special "Satellite Memory',
locations with 8-character alpha-numeric labels allow you to note the satellite
name and transponder mode (e-g-"AO-10/B")
Among the versatile scanning capabilities
of the the FT-847 are:
activation either from the microphone or the front panel of the transceiver.
After stopping on a busy channel, the restart time may be programmed (via
the Menu) at 3, 5, or 10 seconds.
* SMART SEARCH™ sweeping of the Main
VFO (FM mode), with automatic loading of a special bank of 20 memory channels.
* Programrnable Memory Scan, using
sub-band limits you program yourself. For example, you might want to program
144.5 - 148 MHz on 2 meters so as to avoid encroachment on the SSB/CW sub-band
at 144-0 ~ 146 MHz
* Memory Channel #1 serves as the PRIORITY
Channel, which can be checked for activity every five seconds.
* Repeater and Tone Signalling Features
for Today's FM Operator! The FT-847 is an outstanding performed for many
aspects of FM operation.
* Independently-programmable Repeater
Shifts for 28, 50, 144, and 430 MHz.
* Automatic Repeater Shift (ARS) for
144 MHz and 430 MHz.
* FM Wide/Narrow modes for 29 MHz or
crowded VHF/UHF environments.
* CTCSS/DCS Encoder/Decoder and 1750Hz
Tone Encoder are built in.
* Discriminator Center Meter for precise
tuning on Doppler-shifted FM satellite signals.
|Yaesu FT-847 (FT84, FT 847) Earth-Station: The All-in-One Solution to Your Operating needs!
|Yaesu was the first
manufacturer to produce a self-contained amateur HF transceiver; the first
to produce an FM transceiver with memory; the first to produce a full-duplex
satellite transceiver; and now Yaesu is the first to produce an HF/VHF/UHF
all-mode transceiver, ideal for home or field use, with the versatility
to cover every modern operating mode!
* Control Antenna System SWR with
the FC-20 HF/50 MHz External Automatic Tuner Option.
Ideal for tuning out minor SWR variations
in your antenna system, the FC-20 will analyse the impedance present at
the "radio" end of your coax, and adjust the impedance to match the 50
Ohm requirement for your Yaesu FT-847 (FT847, FT 847). Utilising fixed inductances and variable
capacitors controlled by precision stepper motors, the FC-20 can accommodate
SWRs of up to 3:1 on HF and up to 2:1 on 50 MHz. The FC-20 also provides
100 memories for tuning data, so you'll be instantly ready to transmit
on your favourite frequencies, and it includes a convenient Auto-Start
feature in case the antenna system impedance suddenly changes.
* Yaesu's Patented ATAS-100 (ACTIVE-TUNING
ANTENNA SYSTEM) Provides HF/VHF/UHF Coverage with Automatic Motorised Tuning!
The Yaesu FT-847 (FT847, FT 847) Earth Station System can
be expanded for mobile use on the 7/14/21/28/50/144/430 MHz bands via the
revolutionary ATAS-100 ACTIVE-TUNING ANTENNA SYSTEM option. On HF and 50
MHz, the ATAS-100 is controlled via DC voltage transmitted on the coaxial
cable, with an internal motor adjusting the antenna for best SWR by changing
the length of its unique "accordion" tuning section; no "resonators" or
optional "whips" need be changed!
A single touch on the Yaesu FT-847 (FT847, FT 847)'s TUNER
key begins the tuning process, which is completed in seconds. The ATAS-100
is compatible with many common mobile mounts, which are available from
your Yaesu dealer. Coaxial cable is not included.
* Separate Antenna Connectors for
HF, 50 MHz, 144 MHz, and 430 MHz!
Allowing ease of connection for your
antenna systems, the separate antenna connectors for HF, 50 MHz, 144 MHz,
and 430 MHz also facilitate full-duplex operation by avoiding internal
"Duplexers" which can compromise noise figure. If you are using an HF through
50 MHz mobile antenna, the Menu System allows you to switch the 50 MHz
RF line to the "HF" antenna jack. too!
|Yaesu FT-847 (FT84, FT 847) CONVENIENCE
FEATURES FOR ENJOYABLE, EFFICIENT SATELLITE OPERATION!
|* You can label each
of the 19 special Satellite Memories with alpha-numeric "tags" to help
you remember the satellite name and mode.
* During transmission, you can command
the "satellite meter" function to indicate either power output (PO), discriminator
center status (DISC), or ALC voltage (ALC).
* For data operation on satellites,
the rear-panel DATA IN/OUT and PKT jacks can accommodate 9600 bps GMSK,
1200 bps PSK, or 1200 bps AX.25 AFSK modes.
|Yaesu FT-847 (FT84, FT 847) UPLINK/DOWNLINK
NORMAL AND INVERTED VFO TRACKING
|First introduced on Yaesu's
FT-736R, the Yaesu FT-847 (FT847, FT 847)'s VFO Tracking feature slaves the two VFOs according
to the requirements of the satellite's transponder, so you can tune across
the downlink sub-band without having to make manual uplink adjustments,
Some satellites, like RS-12, use a transponder in which the uplink and
downlink frequencies track in the same direction. Other satellites, like
AO-10, FO-20, and FO-29 use "inverted" tracking, whereby moving your uplink
signal higher in frequency lowers your downlink frequency, The Yaesu FT-847 (FT847, FT 847) is
ready for either situation, and you may also make minor Doppler-shift frequency
corrections either to the transmit (uplink) or receive (downlink) frequency
|Yaesu FT-847 (FT84, FT 847) ALL-NEW
LEADING EDGE RECEIVER DESIGN
|Catching DX on all the
amateur bands between 1.8 and 450 MHz requires a receiver with several
basic characteristics: (A) excellent sensitivity, to pull out weak signals:
(B) minimal noise contributed by the receiver: and (C) the ability of the
receiver to survive in the presence of extremely strong signals. The Yaesu FT-847 (FT847, FT 847) was specifically design to excel in all these areas.
On all bands, the fundamental architecture
of the receiver is the same. After input bandpass filtering, a defeatable
RF preamplifier provides front-end gain with very low noise figure and
excellent dynamic range. The RF preamplifier is followed by a one-chip
quad-FET first mixer, which provides outstanding rejection of intermodulation.
The first receiver IF is at 45.705 MHz, while the second IF is at 455 kHz,
where the main IF selectivity elements are found.
The receiver front end is the result
of hundreds of hours testing, evaluation, and re-design so as to provide
wide dynamic range in the presence of a large number of strong signals,
not just two tones in a testing lab. Devices to be used in the front end
are individually selected and matched after extensive testing, so as to
ensure consistent performance in the field. Yaesu, the pioneer in the development
of the HF transceiver, continues that tradition with the leading-edge receiver
performance of the Yaesu FT-847 (FT847, FT 847)!
|Yaesu FT-847 (FT84, FT 847) DIRECT
DIGITAL SYNTHESISER PROVIDES ULTRA-LOW NOISE!
noisy PLL circuits of earlier years, the FT-847 utilises a new-generation
ultra-low-noise DDS (Direct Digital Synthesiser) in its local oscillator
design. The DDS provides very fine tuning steps (down to 0.1 Hz per step!)
for careful tuning of EME signals, seamless Doppler Shift correction during
satellite work, and effortless Digital mode tuning. Additionally, the ultra-low-noise
design of the DDS does not compromise the wide dynamic range of the receiver,
by ensuring that the local signals are pure, with noise sidebands well
suppressed. The outstanding Carrier-to-Noise Ratio of the DDS translates
into better Signal-to-Noise ratio for your Yaesu FT-847 (FT847, FT 847)'s receiver.
|* Low-Noise Receive
Preamplifiers including HEMT Device for 430 MHz!
Ensuring best noise figure for UHF
operation, Yaesu's engineers have incorporated a very-low-noise 10 dB HEMT
(High Electron Mobility Transistor) preamplifier for best sensitivity.
Especially valuable for the 430 MHz DX work, the HEMT preamp contributes
to the FT-847's industry-best sensitivity specification of 0.125 uV for
10 dB S/N (SSB bandwidth). If you have tower mounted preamplifiers you
with to utilise instead, the Yaesu FT-847 (FT847, FT 847) can be configured (independently on
144 and/or 430 MHz) to bypass the internal preamp in favour of passing
+13.8V DC through your coax line to power your preamplifier.
* EXCLUSIVE PUSH-PULL COOLING SYSTEM™!
The Yaesu FT-847 (FT847, FT 847)'s twin cooling fans conduct
heat away from the critical circuitry of the transceiver. The front-panel
fax provides efficient ingress of cool air, which is ducted access the
control and amplifier circuits. The rear fan, in turn, forces warm are
out the back panel vents. The extensive thermodynamic design effort had
produced a transceiver which is ready for challenges of digital mode or
* Exciting Receiver Features Enhance
Your Operating Experience!
* EXPANDED RECEIVE FREQUENCY RANGE
37-76, 108-174, and 420-512 MHz.
So you can check propagation below
6 meters, monitor the 4-meter band, download images from weather satellites,
or follow the action on the public safety frequencies!
* IF SHIFT: For adjustment of IF passband
to avoid interference.
* IF NOISE BLANKER: For reduction of
automotive ignition noise.
* INPUT RF ATTENUATOR: For more comfortable
reception of extremely strong signals.
* FIXED-LEVEL AF OUT JACK: For connection
to tape recorder, WeatherFax decoder. etc.
|Yaesu FT-847 (FT84, FT 847) INNOVATIVE
TRANSMITTER DESIGN CONCEPTS!
|The Yaesu FT-847 (FT847, FT 847)'s unique power
amplification design represents a major breakthrough in the amateur radio
industry. For 1.8-54 MHz, the Yaesu FT-847 (FT847, FT 847) uses a pair of rugged 2SC5125 bipolar
power transistors in a push-pull configuration. On the 144 MHz band a single
2SC5125 is utilised, and on the 430 MHz band, a 2SC3102 UHF power transistor
is used. Carefully specified and selected devices are employed in the power
amplifier stages of the ultra-compact transceiver, producing consistent,
reliable power output with low SSB intermodulation characteristics.
|Yaesu FT-847 (FT84, FT 847) MICROPROCESSOR
CONTROL PROVIDES OPERATING ENJOYMENT!
Quick Navigation via SHUTTLE-JOG™ Tuning Ring
First introduced on Yaesu' s FT-1000MP
and FT920, the Shuttle-Jog™ Tuning Ring provides rapid frequency change
by its unique spring loaded design. Rotating the Shuttle-Jog™ ring slightly
to the left or right begins manual scanning to lower or high frequencies
respectively. Lean the ring further, and the scanning rate increases. There's
no better way to get "feel" for a band than by using Yaesu's exclusive
Separate Sub-VFO Tuning Knob
The Sub-VFO Tuning Knob may be used
in a number of ways. For transceive operation using the Main VFO, this
knob may function as a CLARIFIER control ("R.l.T.") for minor frequency
offsets. During HF "Split" DX pile-up operation, it may be used to adjust
your transmit VFOs frequency. And during Satellite operation, it lets you
correct your uplink frequency for Doppler Shift.
Channelised VFO/MEM CH Control Gets You Where You Want to Operate!
For those situations where quick (but
precise) tuning of the band is required, the VFO/MEM CH switch provides
"channelised" tuning via a rotary switch encoder knob. The step sizes may
be changed, via the Menu, independently for the SSB/CW, AM, and FM modes
and independently (on these modes) for the HF, 50 MHz, 144 MHz, and 430
MHz bands. During Memory Channel operation, this knob provides selection
of your previously-stored memories.
|* "SPLIT" Operation
for DX-pedition and Pile-up Operating!
Besides the Satellite and FM Repeater
modes, the FT-847 includes a "SPLIT" operating mode for DX operation on
the 7 MHz SSB band, or for DX pile-ups where the difference between the
TX and RX frequencies is beyond the Clarifiers +9.99 kHz range. The Sub
VFO serves as the VFO for transmission, and its frequency may be adjusted
via the SUB-TUNE VFO knob.
|* High-Contrast Multi-Function
Blue Liquid Crystal Display (LCD)
The large (200 mm x 20 mm) blue LCD
provides high resolution and contrast for easy viewing over a wide range
of angles and light levels. Dozens of status indicators keep you informed
of every aspect of your FT-847's operational characteristics, with the
large Sub-VFO field on the right side being particularly helpful during
satellite operation. The LCD's illumination brightness is adjustable via
an 8-level dimmer function.
10-Key Direct Frequency Entry Keypad!
For quick QSY particular frequency,
the keypad may be used for direct frequency entry on both the Main and
Sub VFOs. The keypad also provides control functions for repeater, scanning,
and band/frequency hopping.
|* High-Speed Direct
Computer Control Interfacing
Yaesu's CAT System for Computer Aided
Transceiver control is provided via a rear-panel "DB-9" connector, and
it includes a built-in RS232C level converter. Just hook up your serial
data cable, and you're ready for action! Data may be transferred at speeds
of 4800, 9600, or even 57600 bps!
|* Optional Voice Frequency
Announcement Module (FVS-1A)
For operators with impaired vision,
the Yaesu FT-847 (FT847, FT 847) includes provision for the optional FVS-1A Voice Synthesiser,
which gives you an audible announcement of the current operating frequency
(with resolution to the nearest 100 Hz step)
|Yaesu FT-847 (FT84, FT 847) CROSSBAND
FULL DUPLEX OPERATION!
|The four antenna jacks
on the rear panel of the Yaesu FT-847 (FT847, FT 847), in conjunction with Yaesu's time-proven
crossband full duplex design know-how, bring you effortless satellite operation
whereby you can monitor your downlink signal from the satellite while you
are transmitting. The Yaesu FT-847 (FT847, FT 847) is ready for operation on Mode A (TX: 145
MHz, RX: 29 MHz), Mode B (TX: 435 MHz, RX: 145 MHz), Mode J (TX: 145 MHz,
RX: 435 MHz) and Mode T (TX: 21 MHz, RX: 145 MHz). Independent and display
of both uplink and downlink frequencies is provided.
Yaesu FT-847 (FT84, FT 847) SPECIFICATIONS
|Yaesu FT-847 (FT84, FT 847) GENERAL
|100 kHz - 30
||36 - 76 MHz
||108 - 174 MHz
||420 - 512 MHz
||70 Centimeters (Amateur
||USB, LSB, CW, AM, FM,
F1 (9600 bps Packet), F2 (1200 bps Packet), AFSK
||0.1 Hz (CW/SSB), 10 Hz
||50 Ohm, Unbalanced
||-10oC to +50oC
(14oF to 122oF)
||Better than ±2 ppm (0oC
to +40oC) (SSB/CW/AM/AFSK)
||Better than ±5ppm
(-10oC to +50oC) (SSB/CW/AM/AFSK)
||Better than ±(1
kHz +5 ppm) FM
||DC 13.8V ±10%, Negative
||Receive (Squelched): 1.5A
||Receive (Max. Audio):
||Transmit: 22A @ 100W RF
||260(W) x 86(H) x 270(D)
||(10.24" x 3.39" x 10.63")
|Approx. 7 kg (14.4 lb.)
|Yaesu FT-847 (FT84, FT 847) TRANSMITTER
RF Power Output: 160-6m:
Watts (25 Watts AM carrier)
Watts (12.5 Watts AM carrier)
Stage (Low Level)
kHz (±2.5 kHz on FM-N)
least 40 dB down (1.8-29.7 MHz)
least 60 dB down (50/144/430 MHz)
least 50 dB down (1.8-29.7 MHz)
least 60 dB down (50/144/430 MHz)
least 40 dB
least 40 dB
least 31 dB down (14 MHz, 100W PEP output)
Hz - 2600 Hz (-6 dB)
Occupied Bandwidth: SSB:
than 3 kHz
than 0.5 kHz
than 16 kHz
Ohm - 10 K Ohm (Supplied Microphone: 600 Ohm)
|Yaesu FT-847 (FT84, FT 847) RECEIVER
specifications are worst-case
figures are for 10 dB S/N, 12 dB SINAD on FM
|500 kHz -
1.8 MHz :
kHz/2.0 kHz (Opt. YF-115C Installed)
least 1.5W into 8 Ohm @ 10% THD
- 16 Ohm