Band 6 Adjustment (Hp 83640A/50A Only); Band 7 Adjustment (Hp 83650A Only) - Agilent Technologies 83620A Service Manual

66. Adjust calibration constant #135, Squegg Clamp 5A, to maximize RF
output power across the band.

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

67. On the synthesizer set:
START 33.4 GHz
5 5 5
(40 GHz for HP 83640A only)
STOP 38 GHz
5 5 5
POWER LEVEL 25
5 5
68. Set the oscilloscope vertical position as necessary to display the trace.
69. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
70. Modify calibration constant #626, Y F Gain; Band 6, to maximize high
end power.
71. Modify calibration constant #636, Y F O set; Band 6, to maximize low
end power.
72. Repeat steps 70 and 71 until the entire band is peaked.
73. Note the value of calibration constant #636, Y F 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 70 through 72 until it is. hen change calibration constant #636
back to the recorded value.
74. On the synthesizer, set:
POWER LEVEL 0
5 5
75. Adjust calibration constant #136, Squegg Clamp 3A, to maximize RF
output power across the band.

Band 7 Adjustment (HP 83650A only).

76. On the synthesizer set:
START 38 GHz
5 5 5
STOP 50 GHz
5 5 5
POWER LEVEL 25
5 5
77. Set the oscilloscope vertical position as necessary to display the trace.
78. Decrease the synthesizer power level until the level of the entire trace on
the oscilloscope begins to drop.
79. Modify calibration constant #627, Y F Gain; Band 7, to maximize high
end power.
3-68 Adjustments
Amplifier/Filter Adjustments
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dBm
5
dBm
5
dBm
5
HP 8360