Agilent Technologies Weather Radio 1680 User Manual download pdf (Page 160)

160

Chapter 8: Theory of Operation

The information in this chapter will help you understand how the logic analyzer

operates and what the self-tests are testing. This information is not intended for

component-level repair.

Block-Level Theory

The block-level theory is divided into two parts: theory for the logic analyzer and

theory for the acquisition boards. A block diagram is shown with each theory.

Agilent 1680A,AD-Series Logic Analyzer Block Diagram

1 2 ... 155 156 157 158 159 160 161 162 163 164 165 ... 173 174

Logic Analyzer 1
Features 2
Service Strategy 3
In This Book 4
Contents 5
Accessories 10
Specifications 11
Characteristics 11
Auxiliary Power 12
Dimensions 13
Recommended Test Equipment 14
Preparing for Use 15
Power Requirements 16
Operating Environment 16
To inspect the logic analyzer 16
To apply power 17
To start the user interface 18
To clean the logic analyzer 18
To test the logic analyzer 18
Testing Performance 19
The Logic Analyzer Interface 20
Test Strategy 20
Test Interval 20
Performance Test Record 20
Test Equipment 20
To make the test connectors 21
Set up the test equipment 23
Chapter 8 24
3 Set the reporting level 26
5 Click Start 26
Set up the equipment 28
Test the ECL Threshold 30
Test the 0 V User Threshold 31
Test the next pod 32
“from” field 36
Verify the test signal 40
Calibrating and Adjusting 75
Logic analyzer calibration 76
Troubleshooting 77
To install the fan guard 78
To use the flowcharts 79
To check the power-up tests 87
01680f01.cdr 89
To test disk drive voltages 90
To verify the CD-ROM 92
To verify connectivity 99
Device Manager 100
2 Shut down the instrument 100
Chapter 5: Troubleshooting 102
General Troubleshooting 103
6 Set the reporting level 104
8 Click Start 104
Acquisition board status LEDs 106
To test the auxiliary power 112
Replacing Assemblies 113
To remove the power supply 117
To remove the hard disk drive 118
Apply the tape as shown 121
To remove the PCI boards 122
To remove the motherboard 123
To remove the inverter board 130
To remove the fans 131
To remove the cable tray 132
To remove the fascia 134
To remove the deck 137
To remove the line filter 140
Replaceable Parts 143
Replaceable Parts Ordering 144
Replaceable Parts List 145
Exploded View 146
Exchange Assemblies 147
Replacement Parts 147
Front Panel Assembly 151
Chapter 7: Replaceable Parts 157
Theory of Operation 159
Block-Level Theory 160
Power Supply 162
Acquisition Board 162
Power Distribution Board 165
Front Panel Board 165
Self-Tests Descriptions 167
Acquisition Board Self Tests 168
Logic Analyzer Self-Tests 169
Trademark 173
Acknowledgements 173

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