HP 8901B Operation And Calibration Manual page 362

Performance Tests Model 8901B
Audio Counter Range and Sensitivity
6. On the Modulation Analyzer, press S (shift) then AUDIO F m Q .
7. Set the audio synthesizer
to
the frequencies and levels shown in the following table. For each
setting, the Modulation Analyzer's display should read within the limits indicated in the table.
Audio Synthesizer
Frequency (Hz)
I
Level (dBm,
V)
20
20
1
000
1
000
250 000
250 000
+16.5, 3
-13.0, 0.1
-13.0, 0.1
+16.5,
3
+16.5, 3
-13.0, 0.1
Freqi
Lower
0.01 998
0.01 998
0.99997
0.99997
249.997
249.997
ncy Limit!
Actual
kHz)
Upper
0.02002
0.02002
1.00003
1.00003
250.003
250.003
Residual Noise and Distortion
8. Set the audio synthesizer to 380
H z
at -13 dBm (100
mV at
the audio input).
9. On the Modulation Analyzer, press S (shift) then AUDIO DISTN. Press the blue key then press
400
H z
DISTN (the PEAK- key).
10. Slowly step the audio synthesizer up in frequency
to
420
Hz using
2
H z
steps or finer. Note the
highest distortion reading displayed on the Modulation Analyzer. The highest reading should not
exceed 0.3%.
Maximum Residual Distortion;
400
H z
Input at 100 m V
0.3%
11.
Increase the audio synthesizer level to +16.5 dBm. Slowly step the audio synthesizer down in
frequency to 380
H z
using
2
H z
steps or h e r . Note the highest distortion reading displayed on
the Modulation Analyzer. The highest reading should not exceed 0.3%.
Maximum Residual Distortion;
400
Hz Input at 3 V
0.3%
12.
Set the audio synthesizer frequency
to
950
H z .
13. On the Modulation Analyzer, press the blue key then press 1 kHz DISTN (the PEAK+ key).
14.
Slowly step the audio synthesizer up in frequency
to
1050
H z
using
5
H z
steps or finer. Note the
highest distortion reading displayed on the Modulation Analyzer. The highest reading should not
exceed 0.3%.
Maximum Residual Distortion; 1 kHz Input at 3V: 0.3%
15. Decrease the audio synthesizer level to -13 a m . Slowly step the audio synthesizer down in
frequency to 950 Hz using 5 Hz steps or finer. Note the highest distortion reading displayed on
the Modulation Analyzer. The highest reading should not exceed 0.3%.
Maximum Residual Distortion;
1
kHz Input at 100 m V 0.3%
4-22
Performance Test
5