Test Equipment; Adjustable Components - Agilent Technologies 4284A Service Manual

THE ADJUSTMENTS DESCRIBED IN THIS SECTION ARE PERFORMED WITH
POWER APPLIED AND THE PROTECTIVE COVERS REMOVED. DANGEROUS
VOLTAGE LEVELS EXIST AT MANY POINTS AND CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH IF YOU COME INTO CONTACT WITH THEM.

2-3. TEST EQUIPMENT

Table 1-1 lists the test equipment required t o perform the adjustments described in this
section. U s e only calibrated test equipment when adjusting the HP 4284A. I f the recom-
mended test equipment is not available, equipment whose specifications are equal to, or
surpass those of the recommended test equipment may be used.

2-4. ADJUSTABLE COMPONENTS

Table 2-1 lists the HP 4284A's adjustable components, the name of the adjustment related to
each component, and gives a brief description of each adjustment.
Adjustment
Adjustable
Component
AlR19 FREQ-ADJ
Al R52 V-ADJ
A2R123 NULL AMP
VOS ADJ
A2R224 0 DEG
A2R324 90 DEG
SENSE AMP
A3R353
VOS ADJ
A5R11 OSC LVL
WARNING]
Table 2-1. Adjustable Components
Name
Power Supply Switching Frequency Adjustment
Power Supply Output Voltage Adjustment
Null Amp. DC offset Adjustment
Zero Offset Adjustment (0°)
Zero Offset Adjustment (90°)
Sense Amp. DC Offset Adjustment
Signal Source Adjustment
2-2
Description