HP 8672S Operating And Service Manual page 53

Adjustments
Models 8672S/86720A
5-6. LOW BAND ADJUSTMENTS (10 MHz to 2 GHz) (coni'd)
Procedure
(cont'd) —-—----
TP2 J 2 I0S DS/H
17. Program the FEU vernier to 0 dBm by sending the program string "A12B34".
Adjust A10R119 (MG) to set the meter to 0 dBm.
18. Repeat steps 16 and 17 until no further adjustment is necessary.
19. Program the FEU vernier to +1 dBm by sending the program string "A2B134".
20. Adjust A10R27 (+1) for a power reading of +1.00 ± 0.02 dBm on the power meter.
21. Program the FEU vernier to -6 dBm by sending the program string "A14B23".
22. Adjust A10R37 for a power reading of -6 ± 0.02 dBm.
23. Repeat steps 19 through 22 until less than ±0.1 dBm improvement is obtained with
each successive adjustment.
24. Set the Signal Generator to the + 10 dBm range.
25. Program the FEU vernier to -6 dBm by sending the program string "A14B23".
Adjust A10R62 (+4) for a power reading of +4 ±0.02 dBm.
26. Program the FEU vernier to +2 dBm by sending program string "A1B234". Adjust
A10R22 (+12) for a power reading of +12 ±0.02 dBm.
27. Repeat steps 25 and 26 until less than ±0.1 dBm improvement is obtained on each
successive adjustment.
5-4