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Table 5. Frequency Deviation

Calibration Procedure For Modulation Meters Me-57/U And Me-57A/U Page Navigation
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TB 9-6625-2004-35
(2) Set DEVIATION RANGE-KC switch to 50 and FREQUENCY RANGE-MC
switch to 20-55.
(3) Set synthesized signal generator frequency for 50 MHz, level for 100 mV,
modulation frequency (FM) of 20 kHz and FM for a TI DEVIATION meter indication of
40 kHz. If multimeter does not indicate 1 V rms, perform b below.
b. Adjustments.
Adjust AUDIO ADJ (front panel) for a 1 V rms indication on
multimeter (R).
13. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check.
Connect multimeter between pin 6 of V15 (fig. 1) and
chassis ground. If multimeter does not indicate between 189.15 and 200.85 V dc, perform b
below.
b. Adjustments. Adjust VOLTS ADJ R127 (fig. 1) for a 195 V dc indication on digital
voltmeter (R).
14. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
10


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