HP 8901B Operation And Calibration Manual page 423

Adjustments Model 8901B
14. The voltmeter is now set up
to
measure V, which represents the reference output level. Compute
the desired value of
V, (for
1 mW) from the equation
where
H
is the effective efficiency of the thermistor mount at 50 MHz as read from the
mount's label.
Desired
VI
:
Vdc
15. Adjust A32R4
(LEVEL ADJ)
until the voltmeter reading is the same as V, computed in step 14.
If
the adjustment
runs
out of range, replace A32Fl.5
with
7100fl and readjust A32R4.
5-32 Adjustment 19