HP 83522A - Page 171

ADJUSTMENTS
- -
5-20. ALC ADJUSTMENT (CHANGE 8)
NOTE
Complete adjustment of the ALC leveling loop requires procedures
to
be performed in the order prescribed, from Paragraph 5-20
through 5-27. Deviation from this routine may cause improper
leveling
andlor power variation problems.
REFERENCE:
Performance Test: Paragraph 4-14.
Service Sheet: A4
DESCRIPTION:
Adjustments compensate for
DC offsets in the detected RF path and the Main ALC Amplifier.
Power is roughly calibrated and low band flatness is optimized.
HP 3455A
DIGITAL VOLTMETER
1 Ode
DETECTOR ATTENUATOR
m 0
, 1
PWER METER
POWER SENSOR
Figure 5-1 7. ALC Adjustment Test Setup
EQUIPMENT:
...........................................
Digital Voltmeter HP 3455A
...............................................
PowerMeter HP436A
.........................................
Thermistor Mount HP 8485A
....................................
Scalar Network Analyzer HP 8756A
Detector ................................................. HP11664B
ExtenderBoard ....................................... HP08350-60031
10 dB Attenuator ........................................ HP 8493C-010
...........................................
Sweep Oscillator HP 8350A
CHANGE 8 8-3