Agilent Technologies 8360 L Series, Service Manual

Page: 305 / 603

63. Mo dify calibration constan t #625, YTF Gain; Band 5, to maximize high end p o w er.
64. Mo dify calibration constan t #635, YTF Oset; Band 5, to maximize low end p o w er.
65. Repeat steps 61 and 62 un til the en tire band is p eak ed.
66. Note the v alue of calibration constan t #635, YTF Oset; Band 5 .
Step do wn the calibration constan t in 100 coun t steps and v erify that the en tire trace
shifts do wn ev enly . If the p o w er c hange is not uniform, rep eat steps 61 through 63 un til
it is. Then c hange calibration constan t #635 bac k to the recorded v alue.
67. On the syn thesizer, set:
4
POWER LEVEL
5 4
0
5 4
dBm
5
68. Adjust calibration constan t #135, Squegg Clamp 5A, to maximize RF output p o w er
across the band.
Band 6 Adjustment (83640B/L and 83650B/L only).
69. On the syn thesizer set:
4 ST ART 5 4 32 5 4 GHz 5 ( 83640B /L)
4
ST ART
5 4
33.5
5 4
GHz
5 ( 83650B /L)
4 STOP 5 4 40 5 4 GHz 5 ( 83640B /L)
4
STOP
5 4
38
5 4
GHz
5 ( 83650B /L)
4 POWER LEVEL 5 4 25 5 4 dBm 5
70. Set the oscilloscop e v ertical p osition as necessary to display the trace.
71. Decrease the syn thesizer p o w er lev el un til the lev el of the en tire trace on the oscilloscop e
b egins to drop.
72. Mo dify calibration constan t #626, YTF Gain; Band 6, to maximize high end p o w er.
73. Mo dify calibration constan t #636, YTF Oset; Band 6, to maximize low end p o w er.
74. Repeat steps 70 and 71 un til the en tire band is p eak ed.
75. Note the v alue of calibration constan t #636, YTF Oset; Band 6 .
Step do wn the calibration constan t in 100 coun t steps and v erify that the en tire trace
shifts do wn ev enly . If the p o w er c hange is not uniform, rep eat steps 70 through 72 un til
it is. Then c hange calibration constan t #636 bac k to the recorded v alue.
76. On the syn thesizer, set:
4 POWER LEVEL 5 4 0 5 4 dBm 5
77. Adjust calibration constan t #136, Squegg Clamp 3A, to maximize RF output p o w er
across the band.
Band 7 Adjustment (83650B/L only).
78. On the syn thesizer set:
4
ST ART
5 4
38
5 4
GHz
5
4 STOP 5 4 50 5 4 GHz 5
4 POWER LEVEL 5 4 25 5 4 dBm 5
79. Set the oscilloscop e v ertical p osition as necessary to display the trace.
80. Decrease the syn thesizer p o w er lev el un til the lev el of the en tire trace on the oscilloscop e
b egins to drop.
81. Mo dify calibration constan t #627, YTF Gain; Band 7, to maximize high end p o w er.
82. Mo dify calibration constan t #637, YTF Oset; Band 7, to maximize low end p o w er.
83. Repeat steps 79 and 80 un til the en tire band is p eak ed.
84. Note the v alue of calibration constan t #637, YTF Oset; Band 7 .
Step do wn the calibration constan t in 100 coun t steps and v erify that the en tire trace
shifts do wn ev enly . If the p o w er c hange is not uniform, rep eat steps 79 through 81 un til
it is. Then c hange calibration constan t #637 bac k to the recorded v alue.
3-48 Adjustments
Amplifier/Filter Adjustments
Agilent 8360