Calibrator Test (Optional) - HP 3585A Service Manual

Performance Tests
4-1 D. Calibrator Test (Optional)
This test makes a two point test of the calibrator flatness to check for any high frequency
roll-off.
Specification: At 100kHz, -25dBm ± 0.25dB
Equipment Required:
Procedure:
a. Set the 3585A controls for:
b. Set the synthesizer for:
c. Connect the 50n output of the synthesizer to the 50n input of the 3585A.
d. The marker amplitude reading should be -25 dBm ± 0.25 dB to verify proper operation
of the calibrator.
e. Set the 3585A controls for:
f. Set the synthesizer controls for:
g. The marker amplitude reading should be less than ± 0.25 dB verifying that the high fre­
quency roll-off of the calibrator is not excessive.
4-6
At 4OMHz, the 1 00kHz reading ± 0.25dB
Frequency Synthesizer . . . . . . . . . . . . . . . -hp- 3335A
INSTRUMENT PRESET
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB
CENTER FREQUENCY . . . . . . . . . . . . . . . 100 kHz
MANUAL SWEEP . . . . . . . . . . . . . . . . . . . . . . . . on
FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . 100 kHz
AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . -25 dBm
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
ENTER OFFSET
CENTER FREQUENCY . . . . . . . . . . . . . . .
FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . 40 MHz
Model 3585A
40
MHz