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Performance Tests
Model
8902A
Performance Test 5-Audio
Measurements
Specification
Characteristic
AUDIO FREQUENCY
COUNTER
Frequency Range
Accuracy(')
~~~
~
AUDIO DISTORTION
Frequency Range
Residual Noise and Distort
Accuracy
Sensitivity
AUDIO
RMS
LEVEL
Frequency Range
Voltage Range
Accuracy
Performance Limits
20 Hz to 250 kHz
reference accuracy
-+3 digits
reference accuracy
*0.02 Hz
reference accuracy
f0.2
Hz
400 or
1000
Hz
k5O/0
<0.3%
(-50.4 dB)
f l dB of reading
1.5% peak
AM
150 Hz peak FM
0.6 rad peak
0.1 to 3 Vrms
50
Hz to
40 kHz
0.1 to 3 Vrms
i4°/0
Conditions
>1 kHz rate;
>lo% AM, >1.5 kHz FM, or >1.5 rad
@M;
>lo0 mVrms external
>lo%
AM,
>1.5 kHz FM,
or
>1.5 rad
'PM;
>lo0 mVrms external
<1 kHz rate;
<3 kHz rate;
1.5 to 10% AM, 0.15
to
1.5 kHZ FM,
or 0.15 to 1.5 rad
(PM;
3 kHz low-pass filter
20
Hz
to 50 kHz bandwidth; <4OoC
modulation
modulation
modulation
external
( I )
For demodulated signals, the residual noise generated by the Measuring Receiver must be accounted
for in distortion measurements (that is, residual AM, FM, or
M).
Description
All audio measurements are made o n external audio signals. Level accuracy
is
measured by com-
paring the voltage reading o n the Measuring Receiver with the output from a more accurately set
audio oscillator. Residual distortion and noise is measured by making a dist.ortion measurement o n a
4-20
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