HP 8566B Adjustment Manual page 215

22. Decrease reference level to -70 dBm using the step key.
23. DVM indication should be +0.200 f0.002 V dc greater than the
indication recorded in step 19. If not, readjust A4AlR2 LG OS.
24. Decrease reference level to -90 dBm using the step key.
25. DVM indication should be +0.400 ho.004 V dc greater than the
indication recorded in step 19. If not, readjust A4AlR2 LG OS.
26. Repeat steps 17 through 25 until no further adjustments are
required.
6. Video Processor Adjustments
Adjustments 3-75