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.
© Copyright Agilent Technologies 2001, 2004-2005
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

11
Chapter 1: General Information
Specifications
The specifications are the performance standards against which the product is
tested.
Characteristics
These characteristics are not specifications, but are included as additional
information.
Maximum State Speed (selectable) 200 MHz
Minimum Master to Master Clock Time* 5.000 ns
Threshold Accuracy ± (65 mV + 1.5% of threshold setting)
Setup/Hold Time*
Single Clock, Single Edge 4.5/-2.0 ns through -2.0/4.5 ns, adjustable in 100 ps
increments
Single Clock, Multiple Edges 5.0/-2.0 ns through -1.5/4.5 ns, adjustable in 100 ps
increments
Multiple Clocks, Multiple Edges 5.0/-2.0 ns through -1.5/4.5 ns, adjustable in 100 ps
increments
* Specified for an input signal VH = −0.9 V, VL = −1.7 V, slew rate = 1 V/ns, and threshold = −1.3 V.
Full Channel Half Channel
Maximum State Clock Rate 150 MHz not applicable
Maximum Conventional Timing Rate 250 MHz 500 MHz
Memory Depth (1680A, or 1690A-series) 512 K 1024 K
Memory Depth (1680AD or 1690AD-series) 2048 K 4196 K
Channel Count
1680A,AD or 1690A,AD 136 68
1681A,AD or 1691A,AD 102 51
1682A,AD or 1692A,AD 68 34
1683A,AD or 1693A,AD 34 17

12
Chapter 1: General Information
Probes
Maximum Input Voltage +40V Peak AC+DC, CAT 1
Auxiliary Power
Power Through Cables 1/3 amp at 5 V maximum per cable, CAT 1
Operating Environment (for indoor use only)
Temperature:
• Instrument: 0°C to 55°C (+32°F to 131°F).
• Probe lead sets and cables: 0°C to 65°C (+32°F to 149°F).
• Disk media: 10°C to 40°C (+50°F to 104°F).
Humidity: Instrument, probe lead sets, and cables, up to 80% relative humidity at
+40°C (+122° F).
Altitude: To 3067 m (10,000 ft).
Vibration:
• Operating: Random vibration 5 to 500 Hz, 10 minutes per axis, 0.3 g (rms).
• Non-operating: Random vibration 5 to 500 Hz, 10 minutes per axis, 2.41 g (rms); and
swept sine resonant search, 5 to 500 Hz, 0.75 g (0-peak), 5 minute resonant dwell at 4
resonances per axis.

13
Chapter 1: General Information
Dimensions
1680A,AD-Series
1690A,AD-Series

14
Chapter 1: General Information
Recommended Test Equipment
Equipment Required
Equipment Critical Specifications Recommended Model/Part Use*
Pulse Generator 200 MHz, 2.5 ns pulse width,
<600 ps rise time
8133A Option 003 P,T
Digitizing Oscilloscope ≥6 GHz bandwidth,
<58 ps rise time
54750A mainframe with 54751A
plug-in module
P
Function Generator Accuracy (5)(10-6) frequency,
DC offset voltage ±1.6 V
33250A P
Digital Multimeter 0.1 mV resolution, 0.005%
accuracy
3458A P
BNC-Banana Cable 11001-60001 P
BNC Tee BNC (m)(f)(f) 1250-0781 P
Cable BNC (m)(m) 48 inch 8120-1840 P,T
SMA Coax Cable (Qty 3) 18 GHz bandwidth 8120-4948 P
Adapter (Qty 4) SMA(m)-BNC(f) 1250-1200 P, T
Adapter SMA(f)-BNC(m) 1250-2015 P
Coupler (Qty 4) BNC (m)(m) 1250-0216 P, T
20:1 Probes (Qty 2) 54006A P
BNC Coax Cable BNC(m)(m), >2 GHz
bandwidth, >1 meter length
10503A T
BNC Test Connector, 17x2 (Qty
1)**
P
BNC Test Connector, 6x2 (Qty
4)**
P, T
Digitizing Oscilloscope > 100 MHz Bandwidth 54600B T
BNC Shorting Cap 1250-0774 T
BNC-Banana Adapter 1251-2277 T
*A = Adjustment P = Performance Tests T = Troubleshooting
**Instructions for making these test connectors are in chapter 3, "Testing Performance."

15
2
Preparing for Use
This chapter gives you instructions for preparing the logic analyzer for use.

16
Chapter 2: Preparing for Use
Power Requirements
The logic analyzer requires a power source of either 115 Vac or 230 Vac, –22 % to
+10 %, single phase, 48 to 66 Hz, CAT II pollution degree 2, 140/400 Watts
nominal maximum power (1680A/AD-series), and 76/200 Watts nominal
maximum power (1690A/AD-series).
Operating Environment
The operating environment is listed in chapter 1. The logic analyzer will operate
at all specifications within the temperature and humidity range given in chapter
1. However, reliability is enhanced when operating the logic analyzer within the
following ranges:
• Temperature: +20°C to +35°C (+68°F to +95°F)
• Humidity: 20% to 80% noncondensing
Note the recommended noncondensing humidity. Condensation within the
instrument can cause poor operation or malfunction. Provide protection against
internal condensation.
Storage
Store or ship the logic analyzer in environments within the following limits:
• Temperature: -40°C to +75°C
• Humidity: Up to 90% at 65°C
• Altitude: Up to 15,300 meters (50,000 feet)
Protect the logic analyzer from temperature extremes which cause condensation
on the instrument.
To inspect the logic analyzer
1Inspect the shipping container for damage.
If the shipping container or cushioning material is damaged, keep them until you
have checked the contents of the shipment and checked the instrument
mechanically and electrically.
2Check the supplied accessories.
Accessories supplied with the logic analyzer are listed in “Accessories” on
page 10.

17
Chapter 2: Preparing for Use
3Inspect the product for physical damage.
Check the logic analyzer and the supplied accessories for obvious physical or
mechanical defects. If you find any defects, contact your nearest Agilent
Technologies Sales Office. Arrangements for repair or replacement are made, at
Agilent Technologies' option, without waiting for a claim settlement.
To apply power
These steps are required for all 1680A,AD and 1690A,AD-series logic analyzers.
1Connect the power cord to the instrument and to the power source.
This instrument autodetects the line voltage from 115 VAC to 230 VAC. It is
equipped with a three-wire power cable. When connected to an appropriate AC
power outlet, this cable grounds the instrument cabinet. The type of power cable
plug shipped with the instrument depends on the country of destination. Refer to
chapter 7, "Replaceable Parts," for option numbers of available power cables.
2Turn on the power switch located on the front panel.
To connect the 1690A,AD-series logic analyzer to a host PC
These steps are required for the Agilent 1690A,AD-series hosted logic analyzer.
The logic analyzer user interface requires a host computer (PC) with the
following characteristics (or better):
Intel Celeron, AMD K6-II 500 MHz
Windows 2000 Professional or Windows XP Professional
128MB RAM
IEEE 1394 PCI card
1Connect one end of the 6-pin IEEE 1394 cable to the IEEE 1394 port on
the host PC.
2Connect the free end of the IEEE 1394 cable to the IEEE 1394 port on the
logic analyzer.
3Apply power to the PC if it is not turned on.

18
Chapter 2: Preparing for Use
To start the user interface
Start the Agilent Logic Analyzer application from the Start menu or using a
shortcut. On the desktop, the Agilent Logic Analyzer icon looks like:
Refer to the Agilent Logic Analyzer on-line help for information on how to
operate the user interface. Also, refer to the window icon reference on the inside
front cover of this service manual for a brief explanation of the Agilent Logic
Analyzer standard icons.
To clean the logic analyzer
With the instrument turned off and unplugged, use mild soap and water to clean
the front and cabinet of the logic analyzer. Harsh soap might damage the water-
base paint.
To test the logic analyzer
•If you require a test to verify the specifications, start at the beginning of
chapter 3, "Testing Performance."
•If you require a test to initially accept the operation, perform the self-tests
in chapter 3.
•If the logic analyzer does not operate correctly, go to the beginning of
chapter 5, "Troubleshooting."

19
3
Testing Performance
This chapter tells you how to test the performance of the logic analyzer against
the specifications listed in chapter 1.

20
Chapter 3: Testing Performance
The Logic Analyzer Interface
To select a field on the logic analyzer screen, use the arrow keys to highlight the
field, then press the Select key. Provided on the inside front cover of this manual
is a list of logic analyzer icons that can be referenced while performing test
procedures. For more information about the logic analyzer interface, refer to the
Agilent Logic Analyzer application’s online help.
Test Strategy
For a complete test, start at the beginning with the software tests and continue
through to the end of the chapter. For an individual test, follow the procedure in
the test. The examples in this chapter were performed using an Agilent 1680AD.
Other analyzers in the series will have appropriate pods showing on the screen.
The performance verification procedures starting on page 3–8 are each shown
from power-up. To exactly duplicate the setups in the tests, save the power-up
configuration to a file on a disk, then load that file at the start of each test.
If a test fails, check the test equipment setup, check the connections, and verify
adequate grounding. If a test still fails, the most probable cause of failure would
be the acquisition board.
Test Interval
Test the performance of the logic analyzer against specifications at two-year
intervals.
Performance Test Record
A performance test record for recording the results of each procedure is located
at the end of this chapter. Use the performance test record to gauge the
performance of the logic analyzer over time.
Test Equipment
Each procedure lists the recommended test equipment. You can use equipment
that satisfies the specifications given. However, the procedures are based on
using the recommended model or part number. Before testing the performance
of the logic analyzer, warm-up the instrument and the test equipment for 30
minutes.