TB 9-4935-367-24
(5) Set frequency dials to indicate 999.9 kHz. Adjust AMPLITUDE control for an
indication of 10.0 V on output meter. If true rms voltmeter does not indicate between 9.8
and 10.2 V ac, perform b (1) and (3) below. Adjust AMPLITUDE control to minimum output.
(6) Remove voltage divider and connect cable to OUTPUT.
(7) Set frequency dials to indicate 400.0 Hz.
(8) Set OUTPUT ATTENUATOR switch to 30 V and adjust AMPLITUDE control
for 20 V on output meter. If true rms voltmeter does not indicate between 19.4 and 20.6 V ac,
perform b (4) and (5) below. Adjust AMPLITUDE control for minimum output.
b. Adjustments
(1) Adjust AMPLITUDE control for an indication of 10.0 V on true rms voltmeter.
(2) Adjust A3R15 (fig. 1) for an indication of 10.0 V on output meter (R).
(3) Adjust A3C7 (fig. 1) for an indication of 10.0 V on output meter (R).
(4) Adjust AMPLITUDE control for an indication of 20.0 V on true rms voltmeter.
Figure 1. Test oscillator top view adjustments.
(5) Adjust A3R26 (fig. 1) for an indication of 20.0 V on output meter (R).
10. Frequency Response
a. Performance Check
(1) Connect OUTPUT to true rms voltmeter using voltage divider.
(2) Set frequency dials to indicate 9.999 kHz (reference). Adjust AMPLITUDE
control for an indication of 8.00 V on true rms voltmeter. Record output meter indication.
(3) While maintaining output meter indication in (2) above, set frequency dials to
settings listed in table 5. True RMS voltmeter will indicate between 7.76 and 8.24 V ac.
