Band 5 Adjustment (Hp 83640A/50A Only); Band 6 Adjustment (Hp 83640A/50A Only) - Agilent Technologies 83620A Service Manual

35. Record the value of calibration constant #241, Y M O set; Band 4
.
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 26 through 34. Change calibration constant #241 back to its original
value.

Band 5 Adjustment (HP 83640A/50A only).

36. On the synthesizer, press:
START 26.5 GHz
5 5 5
STOP 33.4 GHz
5 5 5
37. Adjust calibration constant #229, Y M Gain; Band 5, for maximum power
at the high end of band 5. he high end power may peak twice. If it does,
adjust the calibration constant to the lower peak (where the value of the
calibration constant is the lower number).
38. Modify calibration constant #242, Y M O set; Band 5, to maximize low
end power. Power may peak twice. Adjust to the lower peak.
39. Set the band 5 SRD bias calibration constants as follows:
a. Increment calibration constant #109, SRD Bias A; Band 5, to maximize
low end power. hen decrease the calibration constant value by 15
counts.
b. Increment calibration constant #122, SRD Bias B; Band 5, to maximize
high end power. hen decrease the power by one third division

( 1/2 dB).
40. Repeat steps 37 through 39 until power is optimized over the full band.
41. Record the value of calibration constant #242, Y M O set; Band 5
.
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 37 through 40. Change calibration constant #242 back to its original
value.

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

42. On the synthesizer, press:
START 33.4 GHz
5 5 5
(HP 83650A)
STOP 38 GHz
5 5 5
(HP 83640A)
STOP 40 GHz
5 5 5
3-44 Adjustments
Amplifier/Multiplier Adjustments
All manuals and user guides at all-guides.com
HP 8360