Controls And Switches - Yaesu FT-901DM Instruction Manual

This transce iver has been specifically designed for
ease of operatio n an d versatility . The operator
m ay , however, be unfamiliar with the operation
of the controls, and improper adjustment thereo f
m ay result in p o o r transceiver perform ance. Thus,
@
(1)
MODE
The MODE switch has six positions for selection
of the operating mode desired : LSB, USB , CW ,
FSK, AM , or FM.
REJECT-WIDTH
(2)
The REJECT
and WI DTH controls are moun te d
on con centri c sh a fts. Th e rej e c tion tuning co
(REJECT), whe n ac tivated by pressing the
to the left of the
silver pushbutton
p rovides variable I F n o tch filte r action
knob, a
n u n
for g a parti cular interfering
l l i out
Th e WIDTH control varies the signal across the
p assban d of one o f the t wo IF 8-pole crystal band­
p ass filters used in this circuit, thus providing a
variable I F bandwidth for rejection o f signals above
o r below the desired signal.
(3) M
The M butt on is pre ssed to store a frequency in
the mem ory circuitry .
being read out on the digital display will be the
frequency st ored when the M button is pushe d .
CONTROL S AND SWITCHES
@
ro
nt
small
REJECT
signal.
Whatever frequency is
be certain that y o u understand the function o f
every control before operating the transceiver.
The various fron t p an el c ontrols and switches
are described in the following section .
®®
(4)
EXT
When pushed, the EXT b utton transfers frequency
control from the FT-9 0 1 DM to an external VFO ,
such as the FV-9 0 1 fully syn thesized scanning
VFO .
(5) VFO
When the VFO button is pushed, frequen cy c on­
l
trol is transfered from EXT or memory con trol t o
the FT-9 0 1 DM in te rn al VFO.
(6) TX-MR-RX
Once a frequency h as been stored by the memory
(M) button, that frequency may be recalled for
control o f either the transmit or receive frequency
by pushing e ither the TX or RX MR button ,
re sp ectively .
( 7 ) MR
Once a frequency h as been stored by the memory
(M) button, that fre quency may be recalle d for
control of the transceive frequency by pushing
the MR button .
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