OPERATION
The tuning pro cedure for this transceiver is not
complicated. However, care should be exercised
when tuning so that peak perform ance of the
equipment is secured. The following paragraphs
describe the procedure for receiver and transmitter
tuning .
( 3 ) The RX CLARIFIER may be utilized if the
received signal is drifting. Push the RX but
ton , and rotate the CLARIF IER control for
offset of up to 2 . 5 kHz . A red LED in dicator
will light up when the clarifier is in use .
( 4) When pulse-type noise is encountered , the
NB (Noise Blanker) swit ch should be activat-
INITIAL CHECK
ed. Advance the noise blanker level control
(located on the front panel) to the point
Before
the transceiver to the power
which provides the desired blanking. Do not
source , be certain that the voltage specification
advan ce the level control beyond the point
m arked on the rear of the transceiver m atches your
required to eliminate the noise pulses.
local supply voltage , and also con firm that a fuse
of the proper rating is being use d .
FREQUENCY SELECTION
Frequency readout on the FT- I O I Z D is by digital
as well as analog displays. The FT- I 0 1 Z uses
analog display only . . The analog readout dial
provides resolution to 1 kHz , while the FT- l O I Z D
digital display provides resolution to 1 O D H z . The
digit al display may be added to the FT- I 0 1 Z as an
option . See your Y aesu dealer for details.
RECEIVE OPERATION
( 1 ) Preset the controls and swit ches as follows :
POWER . . . . . OFF
HEATER . . . . OFF
VFO . . . . . . . . Swit ch pushed
VOX GAIN . . PTT position
RF GAIN . . . . Fully clockwise
AF GAIN . . . Adj ust later for comfortab le
level
BAND . . . . . . Desired b an d
MODE . . . . . . Desired m ode
PRESELECT . Desired b and segment
AGC . . . . . . . . OFF
ATT . . . . . . . . OFF
MARK/NB . . . OFF
( 2 ) Turn t h e power swit ch to ON. The meter will
light u p , and the operating frequency will be
displaye d on the dial window (FT- l O I ZD ) .
Adjust the A F GAIN control for a comfort
able listening level , and adj ust the PRE
SELECT control for m aximum receiver noise
or signal level. The PRE SELECT control may
require repeaking as the transceiver is tuned
across the ban d .
( 5 ) For varying the width o f t h e IF passband ,
press the WIDTH b utton, and rotate the
WIDTH control. In the I F , t wo 8-pole crystal
filters are used . One filter is fixe d , and
presents a boundary for the b andwidth. The
center frequency is then varied across the
passband of the second filter, using a m ixing
scheme that provides no change of pit ch in
the re ceived signal .
The result is continuously variable bandwidth ,
from 2.4 kHz down to approximately 3 00 Hz.
When the WIDTH swit ch is turned OFF, the
second IF filter is instantly aligned with the
first filter, returning the receiver to a 2 .4 kHz
bandwidth.
(6) For extremely strong signals, the ATT (at
tenuator) swit ch may be activated , providing
1 0 dB or 20 dB of attenuation on the in com
ing sign al path, depen ding on the position o f
the A T T swit ch.
TRANSMITTER TUNING
The following tuning pro cedure must be performed
prior to commencing operation on the desired
mode . See the paragraphs relating to the specific
m ode after basic transm itter tune-up has been
accomplished .
Be certain that a dummy load o r m at ched antenna
is connected to the antenna receptacle on t he rear
apron of the transceiver. It is possible to d amage
the final amplifier components of this equipment
if this simple precaution is not followed p rior to
commen cing transmission.
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