TB 9-6625-2004-35
b. Adjustments
(1) Set signal generator frequency to 50.25 MHz.
(2) Adjust FINE TUNE ADJ R75 (fig. 1) until CARRIER SHIFT meter
indicates -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 signal generator frequency to 49.75 MHz.
(4) Adjust FINE TUNE ADJ R75 (fig. 1) until CARRIER SHIFT meter indicates
+250 kHz (R).
(5) Repeat (1) through (4) above until no further adjustment is required.
11. Frequency Deviation
a. Performance Check
(1) Connect equipment as shown in figure 2.
(2) Set DEVIATION RANGE KC switch to 20 and FREQUENCY RANGE-MC
switch to 20-55.
(3) Set measuring receiver to measure frequency.
(4) Set signal generator for a 50 MHz, 100 mV output and set attenuator, as
necessary, to limit signal to black section of TI LIMITING meter.
(5) Adjust TUNING knob for a 0 indication on CARRIER SHIFT meter.
(7) Set measuring receiver to measure FM.