HP 8901B Operation And Calibration Manual page 406

Model
8901B
Adjustments
Adjustment 8
ALC
REFERENCE
0
Service Sheet
8
Description
The
ALL!
reference voltage is adjusted while monitoring it with the internal voltmeter.
Procedure
1. Connect the CALIBRATION RF' POWER OUTPUT
to
the INPUT. (The CALIBRATION RF'
POWER OUTPUT
can
be connected either
to
a
sensor module or directly to the Modulation
Analyzer's INPUT.)
2 . Press the blue key then press INSTR
PRESET
(the AUTOMATIC OPERATION key) to preset
the instrument. Key in 45.16 SPCL
to turn on
the
R F '
power calibrator.
(This
provides a signal
for the Modulation Analyzer's input.) Key in 49.
S
(Shift) 1 SPCL
to
connect the internal
voltmeter
to
a node which represents the average
IF
level which the
ALC
loop forces to equal the
ALC reference.
3 . Adjust A6R65 (ALC REF) for a display beheen 2.0970 to 2.1030.
Adjustment 8
5-15