HP 8642A - Page 280

Performance Tests
Model 8642A/B
PERFORMANCE TESTS
3. On/Off Ratio
Set the spectrum analyzer scale to 10 dB/division. There should be a
broad trace that covers the top half of the screen. The top of the
trace is the pulse on amplitude and the bottom is the pulse off
amplitude; determine the difference in level and verify that the value
is within the specified limits given in the table below.
RF
Frequency
(MHz)
1000.0
2000.0
Results
Min.
30.0
45.0
Actual