HP 8568B, Performance Tests And Adjustments Manual, Page: 124 / 313

3-2. Adjustable Components (continued)
Reference
Designator
1
Al
Adjustment Adjustment
Name Number
E
21
D 21
C
21
B 21
ZERO 21
21
400 MHz OUT
400 MHz OUT
400 MHz OUT
100 MHz
14 Peaks 400 MHz output signal.
14
Peaks 400 MHz output signal.
14 Peaks 400 MHz output signal.
14 Adjusts VCXO frequency.
FREQ ADJUST
PWR ADJUST
15 Adjusts VCO frequency.
15 Adjusts VCO output level.
+ ADJUST 1 Sets V supply voltage.
50 NULL
50 NULL
17 Nulls 50 output.
17 Nulls 50 output.
165 MHz NULL
160 MHz NULL
170 MHz NULL 17 Nulls signal at 165
17 Nulls signal at 160 MHz.
17 Nulls signal at 170 MHz.
160 MHz PEAK
VCO ADJ
160 MHz PEAK
160 MHz PEAK
17 Peaks 160 MHz output signal.
17 Adjusts VCO frequency.
17 Peaks 160 MHz output signal.
17 Peaks 160 MHz output signal.
150 MHz ADJ
100 MHz ADJ 17 Adjusts VCO TUNE voltage at 150 MHz.
17
Adjusts VCO TUNE voltage at 100 MHz.
MHz
MHz
MHz SCAN
5 MHz SCAN
17 Sets discriminator pretune at 0.2 MHz.
17 Sets discriminator pretune at 0.3 MHz.
17 Adjusts frequency span accuracy sweep).
17 Adjusts frequency span accuracy sweep).
BIAS ADJ 16 Adjusts CIA amplifier gate biasing.
Adjustment Function
Adjusts tracking at 18.6 (18.6 to 22).
Adjusts tracking at 12.5 (12.5 to 18.6).
Adjusts tracking at 5.8 (5.8 to 12.5).
Adjusts tracking at 4 (2 to 5.8).
Sets SWEEP + TUNE OUT zero indication.
Sets -9 V and
V dc reference supplies.
Adjustments