Location Of Video Processor Adjustments - HP 8566B Adjustment Manual

6. Video Processor Adjustments
6. Set step attenuator to 120 dB. DVM indication should be 0.0000
f0.0005 V dc. If DVM indication is out of tolerance, adjust
on
for the adjustment location.
7. Set the step attenuator to 0 dB.
8. Key in (
REFERENCE LEVEL
front panel AMPTD CAL control, for DVM indication as close to
+ 1.000 fO.OO1 Vdc as possible.
9. Connect DVM to A4AlTP2.
10. Adjust A4AlR14 OS for a DVM indication of 0.000 ho.003 Vdc.
See Figure 3-36 for the location of the adjustment.
Figure 3-36. Location of Video Processor Adjustments
11. Connect the DVM to A4AlTP3.
12. Set the step attenuator to 120 dB.
13. Adjust A4AlR32 ZERO for a DVM indication of 0.000 fO.OO1 Vdc.
14. Set the step attenuator to 0 dB.
15. Adjust A4AlR36 FS for DVM indication of +2.000 f 0.001 Vdc.
16. Repeat steps 12 through 15 until
required.
17. Set step attenuator to 40 dB.
18. Key in m), CATTEN]
)
REFERENCE LEVEL
19. Connect DVM to A4AlTPl. Record DVM indication. Indication
should be approximately +0.500 Vdc.
20. Decrease reference level to -60 dBm using the step key.
21. Adjust A4AlR2 LG OS for DVM indication of +O.lOO fO.OO1
Vdc greater than the DVM indication recorded in step 19. See
Figure 3-36 for location of adjustment.
) and adjust DATA knob, and then the
no further adjustments are
[
LOG
ENTER
-50 dBm.
R 3 6 R 3 2
F S Z E R O
Vdc