HP 3585A Service Manual page 67

Performance Tests
e. Place the marker on the most positive point of the CRT trace. The marker reading in
the upper right of the CRT will assist you in finding this point.
f. Enter the Offset and Marker reading on the Operational Verification Test Card.
g. Repeat Steps e and g for each of the Resolution Bandwidths listed in the Operational
Verification Test Card.
4· 1 2. Range Calibration
This test verifies that the Range Calibration system is working as specified.
Specification:
Equipment Required:
Procedure:
a. Set the 3585A controls for:
b . Set the synthesizer controls for:
c. Connect the 500 output of the synthesizer to the 500 input of the 3585A.
d. Set the 3585A controls for:
e. Check the marker reading for all ranges, it should be less than ± 0.7 dB to verify that
the RANGE selected is within specification. Enter Marker readings on the Operational
Verification Test Card.
4-8
± 0.7dB (Equals the Reference Level Accuracy
( ± O.4dB) for a -25dBm signal plus the Amplitude
Linearity spec (0.3dB) for a signal 5dB below the
Reference Level)
Frequency Synthesizer . . . . . . . . . . . . . . . -hp- 3335A
INSTRUMENT PRESET
CENTER FREQUENCY . . . . . . . . . . . . . . . 1 50 kHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . -20 dBm
1 dB/DIV
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Hz
MANUAL SWEEP . . . . . . . . . . . . . . . . . . . . . . . . on
REF LEVEL TRACK . . . . . . . . . . . . . . . . . . . . . . off
FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . 1 50 kHz
AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . -25 dBm
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
ENTER OFFSET
RANGE UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 3585A