Agilent Technologies 1680 series User manual

Agilent Technologies 1680/90-Series
Logic Analyzer
Service Guide
Publication number 01680-97016
October 2005
For Safety information, Warranties, and Regulatory information, see the pages at the end
of the book.
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All Rights Reserved.
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2
The Agilent 1680/90-Series Logic Analyzer–At a Glance
Features
Some of the main features of the Agilent 1680A,AD-Series Logic Analyzers are as
follows:
• Standalone benchtop logic analyzer
• Microsoft Windows® XP Professional operating system
• 132 data channels and 4 clock/data channels on the Agilent 1680A,AD
• 98 data channels and 4 clock/data channels on the Agilent 1681A,AD
• 64 data channels and 4 clock/data channels on the Agilent 1682A,AD
• 32 data channels and 2 clock/data channels on the Agilent 1683A,AD
• 12.1-inch LCD display
• 3.5-inch flexible disk drive
• 80GB hard disk drive
• Centronics and LAN interfaces
• IEEE 1394 interface for hosted control
• Variable setup/hold time
• 512K acquisition memory in the Agilent 1680A-series
• 2M acquisition memory in the Agilent 1680AD-series
•MarkerMeasurements
•PS/2Mouse
• PS/2 keyboard support
Some of the main features of the Agilent 1690A,AD-Series Logic Analyzers are as
follows:
• Hosted benchtop logic analyzer
• 132 data channels and 4 clock/data channels on the Agilent 1690A,AD
• 98 data channels and 4 clock/data channels on the Agilent 1691A,AD
• 64 data channels and 4 clock/data channels on the Agilent 1692A,AD
• 32 data channels and 2 clock/data channels on the Agilent 1693A,AD
• IEEE 1394 interface for hosted control
• Variable setup/hold time
• 512K acquisition memory in the Agilent 1690A-series
• 2M acquisition memory in the Agilent 1690AD-series
•MarkerMeasurements

3
Service Strategy
The service strategy for this instrument is the replacement of defective
assemblies. This service guide contains information for finding a defective
assembly by testing and servicing the Agilent 1680/90-series logic analyzers.
This logic analyzer can be returned to Agilent for all service work, including
troubleshooting. Contact your nearest Agilent Technologies Sales Office for
details.
Agilent Technologies 1680-Series Logic Analyzer
Agilent Technologies 1690-Series Logic Analyzer

4
In This Book
This book is the service guide for the Agilent 1680/90-Series Logic Analyzers and
is divided into eight chapters.
Chapter 1 contains information about the logic analyzer and includes accessories,
specifications and characteristics, and equipment required for servicing.
Chapter 2 tells how to prepare the logic analyzer for use.
Chapter 3 gives instructions on how to test the performance of the logic analyzer.
Chapter 4 contains calibration instructions for the logic analyzer.
Chapter 5 contains self-tests and flowcharts for troubleshooting the logic
analyzer.
Chapter 6 tells how to replace assemblies of the logic analyzer and how to return
them to Agilent Technologies.
Chapter 7 lists replaceable parts, shows an exploded view, and gives ordering
information.
Chapter 8 explains how the logic analyzer works and what the self-tests are
checking.

Contents
5
The Agilent 1680/90-Series Logic Analyzer–At a Glance
Features 2
Service Strategy 3
In This Book
1 General Information
Accessories 10
Specifications 11
Characteristics 11
Recommended Test Equipment 14
2 Preparing for Use
Power Requirements 16
Operating Environment 16
Storage 16
To inspect the logic analyzer 16
To apply power 17
To connect the 1690A,AD-series logic analyzer to a host PC 17
To start the user interface 18
To clean the logic analyzer 18
To test the logic analyzer 18
3 Testing Performance
The Logic Analyzer Interface 20
Test Strategy 20
Test Interval 20
Performance Test Record 20
Test Equipment 20
To make the test connectors 21
To set up the test equipment and the logic analyzer 23
Set up the test equipment 23
Set up the 1680A,AD-series logic analyzer 24
Set up the 1690A,AD-series logic analyzer 25
To perform the logic analyzer self-tests 25

6
Contents
To test the threshold accuracy 28
Set up the equipment 28
Connect and configure the logic analyzer 29
Test the ECL Threshold 30
Test the 0 V User Threshold 31
Test the next pod 32
To set up the logic analyzer for the state mode tests 33
To test the single-clock, single-edge, state acquisition 37
Set up the equipment 37
Connect and configure the logic analyzer 37
Verify the test signal 40
Check the setup/hold combination 41
Test the next channels (1680/81A,AD and 1690/91A,AD) 47
To test the multiple-clock state acquisition 48
Set up the equipment 48
Connect and configure the logic analyzer 49
Verify the test signal 51
Check the setup/hold with single clock edges, multiple clocks 52
Test the next channels (1680/81A, AD and 1690/91A, AD) 56
To test the single-clock, multiple-edge, state acquisition 57
Set up the equipment 57
Connect and configure the logic analyzer 58
Verify the test signal 60
Check the setup/hold with single clock, multiple clock edges 61
Test the next channels (1680/81A,AD and 1690/91A,AD) 65
To test the time interval accuracy 66
Set up the equipment 66
Connect and configure the logic analyzer 67
Acquire and verify the test data 69
Performance Test Record 71
4 Calibrating and Adjusting
Logic analyzer calibration 76

Contents
7
5 Troubleshooting
To install the fan guard 78
To use the flowcharts 79
Troubleshooting the Agilent 1680A,AD-series 80
To check the power-up tests 87
To test the power supply voltages 87
To test the LCD display signals 89
To test disk drive voltages 90
To verify the CD-ROM 92
To recover the operating system 93
Troubleshooting the Agilent 1690A,AD-series 95
To verify connectivity 99
To test the power supply voltages 100
General Troubleshooting 103
To run the self-tests 103
Acquisition board status LEDs 106
To test the logic analyzer probe cables 107
To check the BNC Trigger input/output signals 110
To test the auxiliary power 112
6 Replacing Assemblies
1680A,AD-series disassembly/assembly 114
Prepare the instrument for disassembly 114
To remove the chassis from the sleeve 114
To remove the acquisition board 115
To remove the power supply 117
To remove the hard disk drive 118
To remove the CD-ROM drive assembly 119
To remove the flexible disk drive 120
To remove the PCI boards 122
To remove the motherboard 123
To remove the front panel assembly 126
To disassemble the front panel assembly 128
To remove the distribution board 129
To remove the inverter board 130
To remove the fans 131
To remove the cable tray 132

8
Contents
1690A,AD-series disassembly/assembly 133
Prepare the instrument for disassembly 133
To remove the chassis from the sleeve 133
To remove the fascia 134
To remove the acquisition board 136
To remove the deck 137
To remove the power supply 137
To remove the distribution board 138
To remove the fans 139
To remove the line filter 140
To remove the front panel and front frame 141
7 Replaceable Parts
Replaceable Parts Ordering 144
Replaceable Parts List 145
Exploded View 146
Agilent 1680A,AD-Series Replaceable Parts 147
Exploded View 153
Agilent 1690A,AD-Series Replaceable Parts 154
Power Cables and Plug Configurations 157
8 Theory of Operation
Block-Level Theory 160
Agilent 1680A,AD-series Logic Analyzer Theory 161
Power Supply 162
Acquisition Board 162
Power Distribution Board 165
Front Panel Board 165
Agilent 1690A,AD-series Logic Analyzer Theory 166
Acquisition Board 166
Power Supply 166
Power Distribution Board 166
Self-Tests Descriptions 167
Power-up Self-Tests (1680A,AD-series) 167
Connectivity Tests (1690A,AD-series) 167
Acquisition Board Self Tests 168
Logic Analyzer Self-Tests 169

9
1
General Information
This chapter lists the accessories, the specifications and characteristics, and the
recommended test equipment.

10
Chapter 1: General Information
Accessories
The following accessory is supplied with the Agilent 1680/90-series logic
analyzers. The part number is current as of the print date of this edition of the
Service Guide, but further upgrades may change the part number. Do not be
concerned if the accessory you receive has a different part number.
Accessories Available
For probing information, see Probing Solutions for Logic Analysis Systems
(publication 5968-4632E) available at:
http://www.agilent.com/find/logic_analyzer_probes
Accessories Supplied Agilent Part Number Qty
3-button Corded Mouse 1150-7845 1
Mini Keyboard 1150-7809 1