TB 9-6625-2059-35
(6) Set measuring receiver to 125.5 MHz in manual tune mode.
(7) Set measuring receiver switches to measure peak deviation using 300 Hz HI
PASS and 3 kHz LOW PASS filters. Measuring receiver will indicate less than 100 Hz.
(8) Adjust VAR control until DEVIATION (kHz) meter indicates 2 kHz. If
measuring receiver does not indicate between 1.86 and 2.14 kHz, perform b (4) below.
(9) Set DEV/PWR switch to 6 kHz.
(10) Adjust VAR control until DEVIATION (kHz) meter indicates 6 kHz. If
measuring receiver does not indicate between 5.58 and 6.42 kHz, perform b (5) below.
(11) Set DEV/PWR switch to 20 kHz and RCVR WIDE-MID-NARROW switch
to MID.
(12) Adjust VAR control until DEVIATION (kHz) meter indicates 20 kHz. If
measuring receiver does not indicate between 18.6 and 21.4 kHz, perform b (6) below.
b. Adjustments
(1) Adjust A1A13R71 (fig. 5) until DEVIATION (kHz) meter indicates zero (R).
(2) Set GEN-RCVR switch to GEN and adjust A1A13R81 (fig. 5) until
DEVIATION (kHz) meter indicates zero (R). Set RCVR-GEN switch to RCVR.
(3) Repeat (1) and (2) above as necessary.
(4) Adjust VAR control until measuring receiver indicates 2 kHz. Adjust
A1A13R85 (fig. 5) until DEVIATION (kHz) meter indicates 2 kHz (R).
(5) Adjust VAR control until measuring receiver indicates 6 kHz. Adjust A1A13R83
(6) Adjust VAR control until measuring receiver indicates 20 kHz. Adjust
A1A13R79 (fig. 5) until DEVIATION (kHz) meter indicates 20 kHz (R).
a. Performance Check
(1) Set GEN-RCVR switch to RCVR and adjust ANALY DISPR control cw just
out of detent. If bottom of trace on oscilloscope is not between -108 and -110 dBm, perform
b (1) through (3) below.
CAUTION
Do not exceed signal strength greater than -30 dBm.
(2) Connect signal generator to ANTENNA INPUT.
indication on TI display. If signal generator does not indicate between -45 and -55 dBm,
perform b (1) through (17) below.
(4) Adjust signal generator amplitude in 10 dB steps from -30 to -100 dBm. If
signal strength as displayed on TI does not indicate respective signal generator amplitude
outputs 4 dBm relative to reference set in a (3) above, perform b (1) through (17) below.
