HP 3585A Service Manual page 81

Performance Tests
c. Set the 3585A controls for:
d. When the counter reading is stable, set the 3585A controls for:
e. Set the 3585A controls for a CF STEP SIZE equal to one of the frequencies listed for
the Local Oscillator Sideband test on the Operational Verification Test Card.
f. Set the 3585A controls for MANUAL ENTRY - STEP DOWN. this puts the marker
one CF STEP SIZE lower in frequency.
g. Take an average reading of the marker amplitude. Enter this number on the Opera­
tional Verification Test Card under the correct sideband frequency.
h. Repeat Steps f and g two more times.
i. Press the STEP UP key four times. This puts the marker on the first upper sideband
(
frequency + 1).
j . Take an average reading of the marker amplitude. Enter this number on the Opera­
tional Verification Test Card under the correct sideband harmonic frequency.
k. Press the STEP UP key on the 3585A. This puts the marker one CF STEP SIZE higher
in frequency.
1.
Repeat Steps j and k two more times.
m. Set the 3585A controls for RECALL 1 . This returns you to the original Cent er Fre­
quency.
n. Repeat Steps f thru n until all the frequencies on the test card have been tested.
o. Reconnect the OVEN REF OUT and the EXT REF IN on the rear panel. This com­
pletes the Local Oscillator Sideband Test.
4-22
INSTRUMENT PRESET
CENTER FREQUENCY . . . . . . . . . . . . . . . 10 MHz
COUNTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
MARKER - CF
COUNTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
ENTER OFFSET
REFERENCE LEVEL . . . . . . . . . . . . . . . . . -50 dBm
RES. BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Hz
VIDEO BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Hz
MANUAL SWEEP . . . . . . . . . . . . . . . . . . . . . . . . on
SAVE 1
Model 3585A