Band 7 Adjustment (Hp 83650A Only) - Agilent Technologies 83620A Service Manual

136. 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 #566 to put the A term at the high end of the peak. hen
repeat from step 134.
If the power loss in step a is
rest of \Band 6 Adjustment" and continue with \Band 7 Adjustment".
137. Adjust calibration constant #566, Y F Dly erm A Hrm 6, to maximize
power for the low end of band 6.
138. Adjust calibration constant #576, Y F Dly erm B Hrm 6, to maximize
power for the high end of band 6.
139. Adjust calibration constant #216, Y M Rise; Band 6, to minimize power
dropout at the start of band 6.

Band 7 Adjustment (HP 83650A only).

140. On the synthesizer, set:
START 38 GHz
5 5 5
STOP 50 GHz
5 5 5
CONT SWEEP TIME
5
POWER LEVEL 25
5 5
141. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
142. 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 145 through 147) and then
repeat this step.
143. On the synthesizer, set:
SWEEP TIME 0 msec
5 5
3-78 Adjustments
Amplifier/Filter Adjustments
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. 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
again (LED on) and
R ON/O
5

1 dB). If not, adjust
HP 8360