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

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43. Adjust calibration constant #230, Y M Gain; Band 6, for maximum power
at the high end of band 6. 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).
44. Modify calibration constant #243, Y M O set; Band 6, to maximize low
end power. Power may peak twice. Adjust to the lower peak.
45. Set the band 6 SRD bias calibration constants as follows:
a. Increment calibration constant #110, SRD Bias A; Band 6, to maximize
low end power. hen decrease the calibration constant value by 15
counts.
Increment calibration constant #123, SRD Bias B; Band 6, to maximize
high end power. hen decrease the power by one third division

( 1/2 dB).
46. Repeat steps 43 through 45 until power is optimized over the full band.
47. Record the value of calibration constant #243, Y M O set; Band 6
.
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 43 through 46. Change calibration constant #243 back to its original
value.

Band 7 Adjustment (HP 83650A only).

48. On the synthesizer, press:
START 38 GHz
5 5 5
STOP 50 GHz
5 5 5
49. Adjust calibration constant #231, Y M Gain; Band 7, for maximum power
at the high end of band 7. 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).
50. Modify calibration constant #244, Y M O set; Band 7, to maximize low
end power. Power may peak twice. Adjust to the lower peak.
51. Set the band 7 SRD bias calibration constants as follows:
a. Increment calibration constant #111, SRD Bias A; Band 7, to maximize
low end power. hen decrease the calibration constant value by 15
counts.
HP 8360 Adjustments
Amplifier/Multiplier Adjustments
3-45