HP 8559A User Manual

MODEL 8559A
ADJUSTMENTS
ADJUSTMENTS
- -
5 - 17.
POWER SUPPLY CHECKS AND ADJUSTMENTS
REFERENCE:
A7,
A8, A9 Schematics
DESCRIPTION:
The
+ 14.5V and - 10V regulated power supplies on Frequency Control Assembly A7 are adjusted. The
(dependent)
- 12V power supply is then checked for proper dc output (with less than + 50 mV variation) while
the spectrum analyzer is tuned from 10 MHz to
3 GHz. The + 10V power supply on Sweep Generator/Band-
width Control Assembly A9 and the VO (Varactor Offset) voltage on Marker Assembly A8 are then adjusted.
Both the
+ 10V power supply voltage and the VO voltage are temperature - dependent and must be adjusted
during the first five minutes after the spectrum analyzer is turned on (cold instrument).
DIGITAL VOLTMETER
Dl SPLAY
CABLE
ASSEMBLY
FIGURE 5 - 1. POWER SUPPLY CHECKS AND ADJUSTMENTS TEST SETUP
EQUIPMENT:
Digital Voltmeter
........................................................ HP 3456A
Extender Cable ....................................................... HP 5060 - 0303
Cable Assembly, BNC (m) to Banana Plug
...................................
HP 11001A
Adapter, BNC (f) to Alligator Clips ...................................... HP 8120 - 1292

HP 8559A Specifications

General

Brand	HP
Model	8559A
Category	Measuring Instruments
Language	English