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Performance Tests
Audio Counter Range and Sensitivity
~
Frequency (Hz)
20
20
1 000
1 000
250
000
250 000
Model 8902A
Level (dBm)
Lower
Acutal
Upper
+8
0.01998
-
0.02002
-13.0
0.01998
-
0.02002
-1 3.0
0.99997
-
1.00003
+8
0.99997
-
1.00003
+8
249.997
-
250.003
-13.0
249.997
-
250.003
6 .
7.
On the Measuring Receiver, press S (shift) then AUDIO
FREQ.
Disconnect the Audio Analyzer
f r o m the Measuring Receiver's Audio Input. Connect the Audio Synthesizer output
to
the
Measuring Receiver's Audio Input.
Set the Audio Analyzer to the frequencies and levels shown in the following table. For each setting,
the Measuring Receiver's display should read within the limits indicated in the table.
i
Audio Synthesizer
I
Freauencv Limits (kHz1
1
Residual Noise and Distortion
8. Set the audio synthesizer to 380 Hz at -13 dBm (100 mV at the audio input).
9. On the Measuring Receiver, press
S
(shift) then AUDIO DISTN. Press the blue key then press
400 Hz DISTN (the PEAK- key).
1 0 . Slowly step the audio synthesizer up in frequency to 420 Hz using 2 Hz steps or finer. Note the
highest distortion reading displayed on the Measuring Receiver. The highest reading should not
exceed 0 . 3 % .
Maximum Residual Distortion; 400
H z
Input at 100 mV:
0 . 3 %
11. Increase the audio synthesizer level to +16.5 a m . Slowly step the audio synthesizer down in
frequency to 380 Hz using 2
H z
steps or finer. Note the highest distortion reading displayed on
the Measuring Receiver. The highest reading should not exceed 0.3%.
Maximum Residual Distortion; 400 Hz Input at 3V
0.3%
12. Set the audio synthesizer frequency
to
950
H z .
13. On the Measuring Receiver, press the blue key then press 1 kHz DISTN (the PEAK+ key).
1 4 . Slowly step the audio synthesizer up in frequency to 1050 Hz using 5 Hz steps or finer. Note the
highest distortion reading displayed on the Measuring Receiver. The highest reading should not
exceed 0.3%.
Maximum Residual Distortion; 1 kHz Input at 3 V
0.3%
1 5 . Decrease the audio synthesizer level to -13 dBm. Slowly step the audio synthesizer down in
frequency
to
950 Hz using 5
H z
steps or finer. Note the highest distortion reading displayed on
the Measuring Receiver. The highest reading should not exceed 0.3%.
Maximum Residual Distortion; 1 kHz Input at 100 m V
0.3%
4-22
rev.15NOV87
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