Band 3 Adjustment - Agilent Technologies 83620A Service Manual

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calibration constant to the lower peak (where the value of the calibration
constant is the lower number).
13. Modify calibration constant #239, Y M O set; Band 2, to maximize low
end power. Power may peak twice. Adjust to the lower peak.
14. Adjust band 2 SRD bias calibration constants as follows:
a. Increment calibration constant #106, SRD Bias A; Band 2, to maximize
low end power. hen decrease the calibration constant value by 15
counts.
b. Increment calibration constant #119, SRD Bias B; Band 2, to maximize
high end power. hen decrease the power by one third division

( 1/2 dB).
15. Repeat steps 12 through 14 until the entire band is peaked.
16. Record the value of calibration constant #239, Y M O set; Band 2
.
Step down the calibration constant in 100 count steps and verify that the
entire trace shifts down evenly. If the power change is not uniform, repeat
steps 12 through 15. Change calibration constant #239 back to its original
value.

Band 3 Adjustment.

17. On the synthesizer, press:
START 13.5 GHz
5 5 5
STOP 20 GHz
5 5 5
18. Set A12R25 B3S1 fully clockwise (see Figure 3-15).
here are two sets of potentiometers on the A12 assembly with
Note
identical names. Make
ones.
HP 8360
you are adjusting the correct
certain
Adjustments
Amplifier/Multiplier Adjustments
3-41