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Operation
Model 8902A
High Residual FM Can Affect Accuracy.
T h e d RF Level measurement accuracy can be affected by residual FM on the input signal. If the
residual FM is too high (refer to Table
1-1
for Measuring Receiver specifications), the Average
%ed
RF
Level Measurement mode can be used
Approximate Measurement When UNCAL is Displayed.
Approximate calibration factors enable the h e d
RF
Level measurement until
the
Calibrate function
is
used. The UNCAL annunciator indicates that approximate calibration factors
are
being used.
Attenuator/Gain Automatic Ranging.
The instrument automatically ranges as shown in the "Measurement Technique". Refer to Range Hold
on page 3-243 for ways to avoid automatic ranging.
3-108
rev.25JUL.87
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Chapters
