TB 9-6625-2343-50
b. Adjustments
(1) Disconnect equipment setup.
(2) Connect AM/FM test source FM/4 OUTPUT to TI sensor module.
(3) Connect calibrator WIDEBAND OUTPUT to AM/FM test source AUDIO INPUT.
(4) Set calibrator for a wideband output frequency of 1 kHz at a level of 500 mV.
(5) Press TI keys as listed in (a) through (c) below:
(a) INSTR PRESET.
(b) HP FILTER 300 Hz.
(c) LP FILTER 3 kHz.
(6) Adjust AM/FM test source CARRIER FREQUENCY TUNE control for a TI
indication of approximately 100 MHz.
(7) Press TI keys as listed in (a) and (b) below:
(a) DATA MHz.
(b) MEASUREMENT FM.
(8) Adjust calibrator level for a TI indication of 100 kHz.
(9) Press TI ΦM key.
(10) Adjust A3R27 PM SENS (fig. 12) for a TI indication of 100 0.2 rad. (R)
PHASE
SENSITIVITY
Figure 12. A3 board.
NOTE
If this adjustment is made, repeat FM performance check.
(11) Reduce all outputs to minimum and disconnect equipment setup.
11. Audio Filters
a. Performance Check
(1) Press TI INSTR PRESET key.
