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4284A
Agilent Technologies 4284A Service Manual
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52
54
Table of Contents
Table of Contents
16
General Information
20
Introduction
20
Section 1. Gen Eral Information
20
Manual Organization
20
Recommended Test Equipment
21
Serial Number Plate
21
Instru Ment Covered by this Manual
21
Section 2. Adjustments
24
Introduction
24
Safety Consi Derations
24
Adjustable Components
25
Test Equipm Ent
25
Adjustment I Nteraction
26
Initial Operating Procedure
27
Operational Verification
27
Disassem Bly, Top Cover Removal
28
Adjustment Program
29
Adjustment Program Requirement
29
Adjustment Program Specification
29
General I Nformation
29
Initial Operating Procedure
30
Closing Procedure
32
Power Supply Switching Frequency Adjustment
33
Power Supply Adjustm Ents
33
Power Supply Frequency Adjustment Location
34
Switching Waveform
34
Power Supply Voltage Adjustment Setup
35
Power Supply Voltage Adjustment Location
35
Power Supply Output Voltage Adju Stment
35
Sense Amplifier DC O Ffset Adjustment
37
Sense Amplifier DC Offset Adjustment Setup
38
Sense Amplifier DC Offset Adjustment Location
38
DC Bias Level Adjustment
39
DC Bias Level Adjustment Setup
39
Signal Source Adjustment Setup
40
Test Signal Level/Level Mon Itor Adjustm Ents 2-1
40
Signal Source Adjustment Location
41
Test Signal Level/Level Monitor Adjustment Setup
41
I Mpedance Measurement Adjustments 2-1
42
Null Amplifier DC Offset Adjustment Setup
43
Zero Offset Adjustment Location
44
Jumper Settings VS. Adjustable Range
44
Assembly Service Information
46
Replaceable Mechanical Parts List
50
Bottom View
52
Front Panel Assembly Components
53
Front Panel Components
55
Shield Case and Heat Sink
56
Rear Panel Components
59
Coaxial Cable Assembly
60
Label on Rear Panel
60
Tools and Fasteners
61
Top Cover Removal
61
A1 Assembly Removal
62
Front Panel Disassembly
63
A1 0 Assembly Removal
63
A1 3 Assembly Removal
64
Theory of Operation
66
Power Supply Block Section
66
Relationship between the DCV from A1 and each Assembly
67
Digital Control Block Section
68
A 7 Digital Control (CPU)
69
A9 Keyboard
69
A20 HP-IS Interface
69
Source Block Section
70
Transducer Block Section
72
Two Oscillators of the Auto Balance Bridge
73
Auto Balance Bridge
74
Vector Ratio Detector Section
75
Vector Ratio Detector
75
Faulty Board Isolation
78
Self Test
78
Error Messages
78
Self Test Selected by Softkeys
80
Self Test Selected by the Bit Switch
80
Faulty Board Isolation Program
81
Service Sheets
88
Circuit Description
88
Board Connector Pin Assignment
89
Replaceable Parts List
90
Abbreviations
90
Direct Mailing Ordering
92
Component Locations
92
Schematic Diagrams
92
Power Supply Service Sheet
94
Slow Start Circuit
95
Supply Voltage Controller
95
Switching Circuit
95
Shutdown Circuit
95
Troubleshooting Aids
96
Power Supply Troubleshooting Data
96
Replaceable Parts Lists
97
Ai DC Voltage and Test Points
97
A1 Power Supply Replaceable Parts List
98
A2 Modulator Service Sheet
105
A2 Modulator Replaceable Parts List
105
Jumper List
106
A3 Ranger Resistor Service Sheet
109
A7 Digital Control Service Sheet
125
Memory Card Interface Se Rvice Sheet
136
Motherboard Replaceable Parts List
141
A30 Handler Interface Replaceable Parts List
151
Manual Changes
169
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Agilent Technologies 4284A Specifications
General
Brand
Agilent Technologies
Model
4284A
Category
Measuring Instruments
Language
English
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