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  TB 9-4920-453-35
(7) Adjust ac calibrator for frequency of 250 Hz, and OUTPUT amplitude for an indication of
20 on TI meter. Ac calibrator will indicate within ±4% of value recorded in (3) above.
(8) Adjust ac calibrator for frequency of 100 Hz, and output amplitude for an indication of 50
on TI meter. Ac calibrator will indicate within ±4 percent of value recorded in (3) above.
(9) Set RANGE switch to 150.
(10) Adjust ac calibrator for frequency of 50 Hz, and output amplitude for an indication of 100
on TI meter. Ac calibrator will indicate within ±4 percent of value recorded in (3) above.
(11) Set RANGE switch to 500.
(12) Adjust ac calibration output amplitude for an indication of 3 on upper scale of TI meter.
Ac calibrator will indicate 3 times value recorded in (3) above, ±4 percent.
(13) Set RANGE switch to 1500.
(14) Adjust ac calibrator output amplitude for an indication of 10 on lower scale of TI meter.
Ac calibrator will indicate 10 times value recorded in (3) above, ±4 percent.
b. Adjustments. No adjustments can be made.
10. Amplifier Noise Check
a. Performance Check
(1) Disconnect INPUT signal.
(2) Set RANGE switch to OFF and set SENSITIVITY control for channel being tested fully
cw.
(3) Set OPERATION switch to each velocity and displacement position and note meter
indications.
(4) Meter will not indicate more than 1 division on 0 to 5 scale (±2 percent of full scale).
b. Adjustments. No adjustments can be made.
6
CHANGE 1
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