TB 9-4935-367-24
Table 5. Frequency Response Accuracy
Frequency dial settings
999.9
kHz
100.0
kHz
99.99 kHz
10.00 kHz
1.000 kHz
999.9
Hz
010.0
Hz
b. Adjustments. No adjustments can be made.
11. Distortion
a. Performance Check
(1) Connect OUTPUT to audio analyzer using voltage divider.
(2) Position controls as listed in (a) through (d) below:
(a) OUTPUT ATTENUATOR switch to 10 V.
(b) Frequency dials for 040.0 Hz indication.
(c) AMPLITUDE control for a 10 V ac indication on output meter.
(d) VERNIER control to centerline.
(3) If audio analyzer does not indicate less than 0.3 percent distortion, perform b below.
(4) Set frequency dials to settings listed in table 6. Audio analyzer will indicate
within limits specified.
Table 6. Distortion Accuracy
Frequency dial indications
Audio analyzer indications
1.000 kHz
<0.3%
10.00 kHz
<0.3%
100.0 kHz
<1.0%
600.0 kHz
< 1.2%
minimum distortion on audio analyzer.
12. Output Attenuator
a. Performance Check
(1) Adjust AMPLITUDE control for minimum output.
(2) Connect OUTPUT to true rms voltmeter using voltage divider.
(3) Set frequency dials to indicate 1.000 kHz and OUTPUT ATTENUATOR switch
to +20 DBM. Adjust AMPLITUDE control for a 9.0 V indication on output meter.
(4) Adjust true rms voltmeter to measure relative dBm by performing (a) through (f) below.
(a) Select autorange mode (AUTO).
