|
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
very-weak-signal work. |
|
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.
|
|
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 waveforms. |
|
OPTIONAL COLLINS® Mechanical
Filters for SSB and CW! |
 Renowned
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 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 FT-847 an outstanding performer on SSB, CW, or Data! |
* Flexible
Operating Provisions for the CW Operator!
CW flexibility is as essential on VHF
and UHF as it is on HF, and the 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 Amateur!
Your 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 Need!
The rear panel of the 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. |
|
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 FT-847 fortifies Yaesu's
position as the leader in imaginative, easy-to-use memory and
scanning circuitry design.
The 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:
* Scan
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. |
|
The 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 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 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
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! |
|
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. |
|
UPLINK/DOWNLINK NORMAL AND INVERTED VFO
TRACKING |
| First introduced on
Yaesu's FT-736R, the 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 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 manually. |
|
|
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 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 FT-847! |
|
DIRECT DIGITAL SYNTHESISER PROVIDES ULTRA-LOW NOISE! |
|
 Replacing
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
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 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 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 contest operation.
* 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. |
|
INNOVATIVE TRANSMITTER DESIGN CONCEPTS! |
| The FT-847's unique
power amplification design represents a major breakthrough in the
amateur radio industry. For 1.8-54 MHz, the 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.
 |
|
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 Shuttle Jog™! |
| |
 *
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
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) |
|
CROSSBAND FULL DUPLEX OPERATION! |
| The four antenna jacks
on the rear panel of the FT847, 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 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. |
|
| |
|
SPECIFICATIONS |
|
GENERAL |
|
Frequency Ranges:RX: |
100 kHz -
30 MHz |
| |
36 - 76 MHz |
| |
108 - 174
MHz |
| |
420 - 512
MHz |
|
TX: |
160-6 Meters |
| |
4 Meters |
| |
2 Meters |
| |
70 Centimeters (Amateur
Bands Only) |
|
Emission Modes: |
USB, LSB, CW, AM, FM, F1
(9600 bps Packet), F2 (1200 bps Packet), AFSK |
|
Synthesiser Steps (Min.): |
0.1 Hz (CW/SSB), 10 Hz
(AM/FM) |
|
Antenna Impedance: |
50 Ohm,
Unbalanced |
|
Operating Temp. Range: |
-10oC to +50oC
(14oF to 122oF) |
|
Frequency Stability: |
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 |
|
Power Requirements: |
DC 13.8V ±10%, Negative
Ground |
|
Current Consumption: |
Receive (Squelched):
1.5A |
| |
Receive (Max. Audio):
2.0A |
| |
Transmit: 22A @ 100W RF
Output |
|
Case Size: |
260(W) x 86(H) x 270(D)
mm |
| |
(10.24" x 3.39" x
10.63") WHD |
|
Weight: |
Approx. 7 kg (14.4 lb.) |
|
|
TRANSMITTER |
|
RF Power Output:
160-6m: |
100 Watts (25 Watts AM carrier) |
|
2m/70cm : |
50 Watts (12.5 Watts AM carrier) |
|
Modulation Types: SSB: |
Balanced Modulator |
|
FM: |
Variable Reactance |
|
AM: |
Early Stage (Low Level) |
|
FM Maximum Deviation: |
±5 kHz (±2.5 kHz on FM-N) |
|
Spurious Radiation: Harmonics: |
At least 40 dB down (1.8-29.7 MHz) |
| |
At least 60 dB down (50/144/430 MHz) |
|
Non-harmonic: |
At least 50 dB down (1.8-29.7 MHz) |
| |
At least 60 dB down (50/144/430 MHz) |
|
Carrier Suppression: |
At least 40 dB |
|
Opp. Sideband Suppression: |
At least 40 dB |
|
3rd-Order IMD: |
At least 31 dB down (14 MHz, 100W PEP
output) |
|
SSB Frequency Response: |
400 Hz - 2600 Hz (-6 dB) |
|
Max. Occupied Bandwidth: SSB: |
Less than 3 kHz |
|
CW: |
Less than 0.5 kHz |
|
FM: |
Less than 16 kHz |
|
Microphone Impedance: |
200 Ohm - 10 K Ohm (Supplied Microphone:
600 Ohm) |
|
RECEIVER |
| Sensitivity: |
SSB/CW |
AM-N |
FM |
|
500kHz-1.8 MHz: |
- |
20uV |
- |
| 1.8-28
MHz: |
0.25uV |
1uV |
- |
| 28-30
MHz: |
0.25uV |
1uV |
0.50uV |
| 50-54
MHz: |
0.20uV |
0.5uV |
0.25uV |
|
144/430 MHz: |
0.125uV |
- |
0.16uV |
|
|
Above specifications are worst-case |
|
SSB/CW/AM-N figures are for 10 dB S/N,
12 dB SINAD on FM |
|
Squelch Sensitivity : |
SSB/CW/AM |
FM |
| 500
kHz - 1.8 MHz : |
20uV |
- |
| 1.8-28
MHz : |
2uV |
- |
| 28-30
MHz : |
2.0uV |
0.25uV |
| 50-54
MHz : |
1.0uV |
0.20uV |
|
144/430 MHz : |
0.5uV |
0.16uV |
|
|
Image Rejection: |
Better than 60dB |
|
IF Rejection: |
Better than 60dB |
|
Selectivity (-6/-60 dB): |
|
|
SSB/CW: |
2.2 kHz/4.5 kHz |
|
CW-N: |
0.5 kHz/2.0 kHz (Opt. YF-115C Installed) |
|
AM: |
9 kHz/20 kHz |
|
AM-N: |
2.2 kHz/4.5 kHz |
|
FM: |
15 kHz/30 kHz |
|
FM-N: |
9 kHz/20 kHz |
|
Audio Output: |
At least 1.5W into 8 Ohm @ 10% THD |
|
Audio Output Impedance |
|
|
