Band 6 Adjustment (Hp 83640A/50A Only) - Agilent Technologies 83620A Service Manual

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126. Switch between the fastest sweep time (0 ms) and 200 ms sweep time and
check that power changes less than 2/3 division (
the appropriate rise or delay term (steps 129 through 131) and then
repeat this step.
127. On the synthesizer, set:
SWEEP TIME 0 msec
5 5
128. a. Press several times to initiate several sweeps. Note any drop in
SINGLE
5
power.
b. Press
SINGLE R ON/O
5
note any drop in power.
c. he power loss noted in step a can be no smaller than the power loss
noted in step b. If the step a power loss is greater than the step b
power loss by 1 division (
adjustment #565 to put the A term at the high end of the peak. hen
repeat from step 126.
If the power loss in step a is
rest of \Band 5 Adjustment" and continue with \Band 6 Adjustment".
129. Adjust calibration constant #565, Y F Dly erm A Hrm 5, to maximize
power for the low end of band 5.
130. Adjust calibration constant #575, Y F Dly erm B Hrm 5, to maximize
power for the high end of band 5.
131. Adjust calibration constant #215, Y M Rise; Band 5, to minimize power
dropout at the start of band 5.

Band 6 Adjustment (HP 83640A/50A only).

132. On the synthesizer, set:
START 33.4 GHz
5 5 5
(40 GHz for HP 83640A)
STOP 38 GHz
5 5 5
CONT SWEEP TIME
5
POWER LEVEL 25
5 5
133. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
134. Switch between the fastest sweep time (0 ms) and 200 ms sweep time and
check that power changes less than 2/3 division (
the appropriate rise or delay term (steps 137 through 139) and then
repeat this step.
135. On the synthesizer, set:
SWEEP TIME 0 msec
5 5
HP 8360
5
. hen press
5

1.5 dB), increase the A term of the delay
smaller than that in step b, skip the
not
0 msec
5 5 5
dBm
5
5
Amplifier/Filter Adjustments

1 dB). If not, adjust
again (LED on) and
R ON/O
5

1 dB). If not, adjust
Adjustments 3-77