HP 8340B Manual page 298

5-15.
ALC ADJUSTMENTS (Cont'd)
32. Adjust the
power
supply for +0.3
Vdc. The power meter indication should be between 2.18 to
2.38 dB.
If
the indication is not
in this
range, adjust A26R91 (AM GAIN, Figure 5-51) for
a power
meter indication within the given range.
A26
a
DD
iimiminmmimir
Figure 5-51.
A26
Linear Modulator Component Location Diagram
33. Adjust the
power supply
for —0.3 Vdc. The
power meter
indication should be between —2.91 and
-3.29
dB.
If
the indication is not
in this
range, adjust A26R91 (AM GAIN) for
a power meter
indication within the given range.
34.
Repeat
steps 32 and 33
until the power level requirements are met for each step.
NOTE
If
adjustments of the calibration constants were made
in this
procedure,
the data thus stored in
the "working memory area" should be copied to
the "protected memory area"
by
pressing the following key sequence:
[SHIFT]
[MHz] [1] [4] [Hz] [SHIFT] [kHz] [5] [3] [4] [9] [Hz].
Wait
for
"CALIBRATION RESTORED"
to be displayed
in
the ENTRY DISPLAY and
then press [INSTR PRESET].
HP 8340B/41B
Adjustments