HP 83522A User Manual

Model 83522A
ADJUSTMENTS
Adjustments
5-23. POWER METER LEVELING CALIBRATION
NOTE
Complete adjustment of the leveling loop for Power Meter leveling requires
several procedures to be performed in the order prescribed from Psragraph
5-20 through 5-24. Deviation from this routine may cause improper leveling
andlor flatness problems.
REFERENCE:
Performance Test:
8350A Paragraph 4-14.
Service Sheet: A4
DESCRIPTION:
Power Meter leveling gain potentiometer
A4R9 (PM) calibrates loop gain to full-scale
deflection
of the leveling meter.
EQUIPMENT:
Sweep Oscillator
..................................................... HP 8350A
Power Meter. ......................................................... HP 432A
Thermistor Mount.
.................................................... HP 478A
10 dB Attenuator..
........................................ HP 8491A Option 010
PROCEDURE:
NOTE
If, during the following procedure, ALC loop oscillations occur, reduce loop
gain
by adjusting A4R11 (Figure 5-26) counterclockwise. This adjustment
will be set in the next procedure.
1.
ect equipment
as shown in Figure 5-23. Ensure 8350A is off. Press
and select a frequency at
midband.
SWEEP R F
OSCILLATOR PLUG-IN
POWER
METER
.,
RF - INPUT
OUTPUT
- I
ATTEN UATOR THERMISTOR
MOUNT
I
Figure 5-23. Power Meter Leveling Calibration
5-33

HP 83522A Specifications

General

Brand	HP
Model	83522A
Category	Inverter
Language	English