TB 9-6625-2004-35
10. Carrier Shift
a. Performance Check
(1) Set FREQUENCY RANGE-MC switch to 20-55 and adjust FREQUENCY-MC
dial to 50.
(2) Set synthesized signal generator frequency to 50 MHz and level to 100 mV.
(3) Adjust TUNING control for a 0 indication on CARRIER SHIFT meter.
(4) Set TUNE-FINE TUNE switch to FINE TUNE and adjust TUNING control for
a 0 indication on CARRIER SHIFT meter. Record synthesized signal generator indication.
(5) Set synthesized signal generator frequency for a -250 kHz indication on
CARRIER SHIFT meter. Record synthesized signal generator indication.
(6) Subtract lower from higher frequency value recorded in (4) and (5) above. If
difference is not between 225 and 275 kHz, perform b below.
(7) Set synthesized signal generator frequency for +250 kHz indication on
CARRIER SHIFT meter and subtract frequency counter indication from value recorded in
(4) above. If difference is not between 225 and 275 kHz, perform b below.
b. Adjustments
(1) Set synthesized signal generator for an indication of 250 kHz above value
recorded in a (4) above.
(2) Adjust FINE TUNE ADJ R75 (fig. 1) until CARRIER SHIFT meter indicates a
negative shift of 250 kHz (R).
NOTE
If positive and negative shift are both high, adjustment of
FINE TUNE ADJ R75 alone will not correct out-of-tolerance
condition. Refer to TM 11-6625-2629-14&P for realignment
procedures.
(3) Set synthesized signal generator for an indication of 250 kHz below value
recorded in a (4) above.
