HP 8642A - Page 295

Model 8642A/B
Performance Tests
PERFORMANCE TESTS
8. The actual phase noise is calculated from the reading obtained in step
6 by applying
the following corrections:
a. Subtract the reading from step 4 to convert the reading to
units of dBc.
b. Add -63.5 dB. (-50 dB for 8642 attenuator change, -10 dB
for 1 Hz bandwidth normalization, -6 dB for single side band
conversion, + 2.5 dB to correct for the Log shaping and average
detection.)
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