Yaesu FT-902DM, Instruction Manual

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ALL MODE HF TRANSCEIVER
FT-902DM
GENERAL DESCRIPTION
The FT-902DM is
a
precision engineered, high per­
forman�e H F transceiver of advanced design, pro­
viding all band coverage ( 160, 80, 40, 30, 20, 1 7,
15, 12, and 10 meters) on all modes of operation;
LSB, USB, CW, FSK, AM, and FM . This trans­
ceiver operates at an input power of 180 watts
on SSB/CW and 80 watts on AM, FM, and FSK.
Advanced features include PLL (Phase Locked
Loop) frequency derivation, digital plus analog
frequency readout with large display LED digits,
a built-in Curtis 8044 IC electronic keyer, and
memory frequency control circuitry. State-of-the­
art receiver performance features include rejection
tuning, dual-filter variable
IF
bandwidth tuning,
and, 'for CW, audio peak frequency
(APF)
tuning
for unsurpassed rejection of unwanted signals.
Other built-in features include VOX, semi-break­
in CW with sidetone, 25 kHz calibrator, advanced
noise blanker, RF
speech processor, and a 20 dB
RF attenuator for protection against receiver
overload.
All circuits, except the transmitter driver and
final amplifier stages, are solid state, utilizing
modern plug-in printed circuit boards, thus per­
mitting easy maintenance.
-1-
The FT-902DM transceiver is entirely self-con­
tained, requiring only an antenna and power source
for operation. For base station operation, AC
power voltages of
I
00/
l l
0/ 117/200/220/234 V AC
may be chosen, though the unit normally is sup­
plied with 117 volt capability. A D C-D C converter
unit provides fer mobile or portable operation.
Selection of AC or DC power source is automati­
cally made when the proper line cord is inserted.
For mobile operation a separate switch is provided
on the front panel to turn off the tube heaters
while in the receive mode. With the heaters off,
current consumption is only 1.1 amp.
Among the available options on economy models
FT-902D /SD/D E are the memory unit, the keyer
unit, the D C-D C converter, the FM unit, and the
cooling fan. Optional equipment on all models are
the 600 Hz CW filter and the 6 kHz AM filter.
The entire FT-902DM transceiver weighs approxi­
mately 18 kg., and is 342 mm wide, 154 mm high,
and 324 mm deep. A diecast front panel and
heavy-duty case provide maximum protection
against damage from shock and vibration during
travel use.