Multi-Band Y F Delay - Agilent Technologies 83620A Service Manual

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144. 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 #567 to put the A term at the high end of the peak. hen
repeat from step 142.
If the power loss in step a is
rest of \Band 7 Adjustment" and continue with \Multi-band Y F
Delay".
145. Adjust calibration constant #567, Y F Dly erm A Hrm 7, to maximize
power for the low end of band 7.
146. Adjust calibration constant #577, Y F Dly erm B Hrm 7, to maximize
power for the high end of band 7.
147. Adjust calibration constant #217, Y M Rise; Band 7, to minimize power
dropout at the start of band 7.
Multi-band YTF Delay.
148. On the synthesizer, set:
START 13 GHz
5 5 5
STOP 20 GHz
5 5 5
CONT SWEEP TIME
5
POWER LEVEL 25
5 5
149. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
Synthesizer intensity markers are set to identify the bandcross
Note
frequencies (7.0, 13.5 GHz, and 20.0 GHz). Reduce oscilloscope
trace intensity to identify these markers. You can also
identify bandcrosses by temporarily removing the cable from
the Z-AXIS BLANK/MKRS connector on the synthesizer
rear panel. Make sure this cable is connected when making
adjustments.
HP 8360
. 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
Amplifier/Filter Adjustments
again (LED on) and
R ON/O
5
Adjustments 3-79