NAVAIR 17-2OAX-737
4.7.25 Set the TI LOC DDM switch to 150 Hz.
4.7.26 Verify that the signal generator calibrator indicates between 38.4% and 41.6% AM modulation,
and record the reading.
4.7.27 Verify that the TI meter indicates within ±1.6%of the recorded value in step 4.7.26.
4.7.28 Set the TI LOC DDM switch to 0, and the FREQUENCY MHz switches to 118.000.
4.7.29 Activate the signal generator calibrator 50 Hz HP FILTER, and the 15 kHz LP FILTER.
4.7.30 Verify that the signal generator calibrator indicates between 28.8% and 3 1.2% AM modulation.
4.7.31 If the TI is a NAV—750B, proceed with step 4.7.32. Otherwise, if the TI is not a NAV—750B, skip
to step 4.7.41.
4.7.32 Set the TI controls as follows:
FREQUENCY MHz switches to
075.000
MASTER MOD control to
CAL (UNCAL lamp off)
Meter function and tone Selector switch to
400 Hz
1020 Hz indent tone MOD control to
CAL (UNCAL lamp off)
Output attenuator control to
—20 dBm
4.7.33 Press the signal generator calibrator INSTR PRESET key (Blue key, AUTOMATIC OPERATION
key), and ensure that the signal generator calibrator is in the FREQ measurement mode and tunes to the
TI
FREQUENCY MHz switches setting. Set the signal generator calibrator for AM modulation
measurements with the DETECTOR set to PEAK
±12.
Activate the signal generator calibrator 50 Hz HP
FILTER, and the 15 kHz LP FILTER.
4.7.34 Verify that the signal generator calibrator indicates between 92. 15% and 97.85% AM modulation,
and record the reading.
4.7.35 Verify that the TI meter indicates within ±3%of the recorded value in step 4.7.34.
4.7.36 Set the TI meter function and tone selector switch to 1300 Hz.
4.7.37 Verify that the signal generator calibrator indicates between 92.
15%
and 97.85% AM modulation.
4.7.38 Set the TI meter function and tone selector switch to 3000 Hz.
4.7.39 Activate the signal generator calibrator 300 Hz HP FILTER, and the >20 kHz LP FILTER.
4.7.40 Verify that the signal generator calibrator indicates between 92. 15% and 97.85% AM modulation.
4.7.41 Disconnect the signal generator calibrator sensor module from the TI.
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