Model 3585A
Performance Tests
e. Check the readings in the upper right-hand corner. They should read:
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz
.00 dB (O.dB)
If the readings are not correct, set the OFFSET control OFF and continue at Step d.
f. Move the marker down the left side of the trace until a marker amplitude reading of
-3 .00 dB ± 0.02 dB (-60.0 dB ± 0.4 dB) is obtained.
g. Press ENTER OFFSET.
h. Move the marker to the right side of the trace until a reading of 0.00 dB ± 0.02 dB
(0.0 dB ± 0.4 dB) is obtained.
i. Read the value displayed as OFFSET. This value represents the frequency span between
the 3 dB (60 dB) points of the IF filter. The value obtained should be within ± 20070 of the
chosen bandwidth.
j . Record the OFFSET value in the 3 dB (60 dB) column, across from the appropriate
bandwidth, on the Operational Verification Test Card.
k. Set the 3585A controls for:
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
RES. BW .
.
. . . . . . . . . . . . . . . . . . .
.
. . . . . . . . . . . . *
FREQUENCY SPAN .
.
. . . . . . . . . . . . . . . . . . . . .
.
*
*Next value on test card.
1.
Repeat Steps c thru k until all the 3 dB (60 dB) all bandwidth measurements listed on
the test card have been completed.
m. Now the 60 dB bandwidth measurements will be made. For the remainder of the band
width tests use the values in parenthesis wherever they occur.
n. Set the 3585A controls for:
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . 100 Hz
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB
RES. BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Hz
o. Repeat Steps c thru k.
p. Set the 3585A controls for VIDEO BW 10 Hz.
q. Repeat Steps c thru
I
for the remaining 60 dB bandwidth measurements listed on the
test card.
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Summary of Contents for 3585A
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