TB 9-6625-2102-35
(5) Adjust VARIABLE control fully ccw.
(6) Adjust R93 (fig. 1) until audio analyzer indicates between 960 and 1000 Hz (R).
(7) Disconnect TI from audio analyzer and connect to oscilloscope Vertical 1 input.
(8) Set up oscilloscope to measure duty cycle.
(9) Set FREQ/PERIOD MULT (Hz/s) switch to 10/1K and adjust VARIABLE
control fully cw.
(10) Adjust R14 (fig. 1) until the oscilloscope indicates a duty cycle between 49 and
51% (R).
(11) Adjust VARIABLE control fully ccw.
(12) Adjust R17 (fig. 1) until the oscilloscope indicates a duty cycle between 49 and
51% (R).
(13) Set FREQ/PERIOD MULT (Hz/s) switch to 1K/100K.
(14) Adjust R75 (fig. 1) until the oscilloscope indicates a duty cycle between 49 and
51%.
(15) Repeat this adjustment procedure for best in-tolerance condition on all ranges.
9. Modulation Generator Zero
a. Performance Check
(1) Connect MODULATION GENERATOR OUT (600Ω) to audio analyzer
INPUT HIGH.
(2) Set up audio analyzer as listed in (a) through (d) below:
(a) INIT.
(b) SPCL 17 (slow detector).
CHANGE 1
