HP 3585A Service Manual page 97

Performance Tests
Procedure:
a . Allow the instruments used in this test to warm up for 15 to 20 minutes before begin­
ning this test .
b . Set the synthesizer controls for :
c. Set the 3585A controls for :
d. Using a BNC "T" contector, connect the synthesizer 's 50 ohm output to the frequency
counter and the 3585A 50 ohm input .
Be sure that the synthesizer and the 3585A are operating on their
own internal references. disconnect any reference connection com­
mon to both instruments.
e . Record the frequency difference between the frequency counter and the 3585A counter
reading. Difference frequency equals
f. The 3585A frequency accuracy is specified in terms of frequency drift; therefore, if the
frequency accuracy derived from this test is not in accordance with your requirements, turn
to Section 5 of this manual for the Reference Oscillator Adjustment procedure .
g . This completes the Frequency Accuracy Test , reconnect any necessary references .
COU N T E R
4-38
FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . 9 MHz
AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . 0 dBm
INSTRUMENT PRESET
MANUAL SWEEP . . . . . . . . . . . . . . . . . . . . . 9 MHz
COUNTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
NOTE
Hz .
S Y N T H E S I Z E R
BNC " T "
Figure 4·8. Frequency Accuracy Test
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SPEC TRUM ANAL Y Z E R
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