HP 54620A Manuel

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current name/number is now Agilent XXXX. For example, model number

HP8648A is now model number Agilent 8648A.

Advanced Test Equipment Rentals

www.atecorp.com 800-404-ATEC (2832)

User and Service Guide

Publication Number 54620-97011

October 1995 (pdf version Dec 1998)

For SafetyInformation, Warranties, and Regulatory information,

seethepagesbehind the Index.

©Copyright Hewlett-Packard Company1994, 1995

All RightsReserved

HP 54620A/C Logic Analyzer

The HP 54620A/C at a Glance

Displayshows thecurrent input signals

and much more

•Up tosixteen (16) channels in normal

ordelayedmode

•Indicatorsfor glitch or normal

acquisition,timebase,channel

activity, trigger andacquisition status

•Softkey labels

•Measurement results

•Color Palettes

Channel Controls select, position, and

labelinputs

•Turn channels onor off individually

or in groups of8

•Rearrange order of channelsto

group related signals

•Create and display labels toidentify

channels, and setchannel colors

General Controls measure, save and

restore results, and configure the

analyzer

•Measurement keysprovide

automatic single or dual-channel

time andfrequencymeasurements,

or use cursors to makemanual

measurements

•Save orrecallmeasurement

configurationsorprevious results

•Autoscale performs simple

one-button setup ofthe analyzer

Horizontal Controls select sweep speed

and delay parameters

•Sweepspeeds from 5ns/div to 1s/div

•Delay control moves waveform

display to point of interest

•Delayed mode and delay allow

zooming in to show aportion of

waveformindetail(splitscreen)

Storage Keys begin and end data

acquisition

•Run/Stop startsand stopscontinuous

acquisitions

•Single performsoneacquisition

•Autostore accumulates and displays

the results of multipleacquisitions

(like persistence on an oscilloscope)

•Erase clearsthe current acquisition

and all accumulated data

TriggerKeys define what data will be

captured bythe analyzer

•Edge mode allows triggering on a

positiveor negative edge(orboth) of

anysinglechannel

•Patternmode allowstriggering on a

pattern of channels eitherhigh,low,

or don’t care,with asingle edge

qualifier

•Advancedmode allows sequential

triggers, combined patterns, patterns

andedges,patterndurations,and

edge occurrence counts

Softkeys extendthe functionality of

command keys

Selectmeasurementtypes, operating

modes,trigger specifications, labeldata,

and more

TriggerInput/Output

Trigger the HP 54620A/C from other

instruments or use the HP54620A/C to

trigger other instruments

Channel Inputs through a flexible

probingsystem

•Sixteenchannels through a dual

8-channel cable with micro-grabbers

•Set logiclevels asTTL, CMOS,ECL,or

to a user-definablevoltage

Measure time

Save/Recall Entry

LOGICANALYZER

54620A

16 CHANNEL 500 MSa/s STORAGE

TRIGGER

HORIZONTAL

CHANNEL

INPUTS

Line

~5V

Logic

levels

Label

Single

channel

Edge

Auto

scale

Adv

Trace

Pattern

5 ns1 s

150

Time/Div

Run

Stop

Dual

channel

Display

Setup

Mode

Single

Cursors

Utility

Auto-

store Erase

Select

Trigger out

Delay

Position

Off

Main

Delayed

1 MQ

+40 V Max

Ext trigger in

Trigger

Keys

Display Channel

Controls General

Controls Horizontal

Controls Storage

Keys

Softkeys Brightness

Control(for

HP 54620A

only)

Power

Trigger

Input/

Output

Channel

Inputs

Micro-grabbers

In This Book

The HP 54620A/C User and Service Guide is your guide to using the

features of the Logic Analyzer in the design and troubleshooting of digital

system circuitry.

Chapter 1, “Getting Started,” explains how to set up the analyzer and make

basic measurements. It also gives an overview of basic analyzer operational

concepts including use and interpretation of the front panel and display.

Chapter 2, “Making Analyzer Measurements,” shows you how to use the

instrument configuration features, measure waveform data, control data

acquisition, examine captured data in more detail, set up analyzer trigger

conditions, and shows how to use the analyzer with other instruments.

Chapter 3, “Solving Problems,” shows you how to fix the most common

kinds of problems that might occur when you begin operating the analyzer.

Chapter 4, “Ensuring Accurate Measurements,” explains the relationships

between the analyzer time base and other time-dependent functions,

discusses the effect of probes on measurement accuracy, and explains the

glitch detection system. After you have made a few measurements with the

HP 54620A/C, it is a good idea to read this chapter.

Chapter 5, “Testing, Adjusting, and Troubleshooting the Logic Analyzer,”

explains how to test the HP 54620A/C to ensure that it operates correctly.

The chapter also shows how adjust and troubleshoot the analyzer.

Chapter 6, “Replaceable Parts,” explains how to remove and replace the

various assemblies in the analyzer. The chapter also lists the replaceable

parts for the analyzer and gives ordering information.

Chapter 7, “Performance Characteristics,” lists the measurement

performance standards to which the instrument is tested.

Chapter 8, “Messages,” lists the status and error messages that may be

displayed by the analyzer, explains their causes, and tells what to do to

correct the problem.

If you want to automate HP 54620A/C measurements using a programmable

controller such as an IBM-compatible PC or an HP 9000 Series 700 controller,

see the HP 54620A/C Programmer’s Guide and the HP 54620A/C

Programmer’s Reference. The Programmer’s Reference is supplied as a

help file on a 3.5" diskette. The diskette includes a help file viewer for

Microsoft Windows 3.1, and Microsoft Write editor versions of the files. ASCII

files are also supplied.

Making Analyzer

Measurements

Solving Problems

Ensuring Accurate

Measurements

Glossary

Testing, Adjusting, and

Troubleshooting the Analyzer

Replaceable Parts

Performance Characteristics

Messages

Getting Started

Index

Contents

1 Getting Started

Preparing the Analyzer 21

To check package contents 22

To check optional accessories 24

To power-on the logic analyzer 27

To adjust the handle 28

To adjust display brightness 29

Using Color 30

To select the color palettes and observe colors 31

To assign colors to channels 33

To print in color 34

Making Measurements 35

Learn the front panel 35

To probe a circuit 42

To set up an acquisition using Autoscale 44

To start and stop an acquisition 46

To define a simple edge trigger 47

To adjust the time base (sweep speed) 48

To turn channels on and off 49

To rearrange the channels 50

2 Making Analyzer Measurements

Setting Logic Levels 53

To change the logic threshold for input signals 54

Controlling Data Acquisition 55

To take a single acquisition 56

To use Auto Glitch Detect 57

To accumulate the results of every acquisition 58

To erase the waveform display 58

Using Labels 59

To turn the label display on or off 59

To assign a label to a channel 60

To define a new label 62

To initialize the label list 64

Triggering the Analyzer 65

Trigger types 65

To define the trigger mode 70

To define an edge trigger 72

To define a pattern trigger 73

To define an advanced trigger 74

Examining the Captured Data 80

Viewing acquired data with delayed sweep 80

To show both main and delayed sweep displays 82

To change the time reference position 83

To pan the display 86

To modify the graticule 87

To print the display 88

Measuring Waveform Data 89

Ways to measure data 89

To use the cursors 94

To measure waveform parameters on a single channel 96

To measure channel-to-channel delay 98

To measure setup time 100

To measure hold time 102

Using the Analyzer with Other Instruments 104

Extending trigger capabilities 104

To use the external trigger input 108

To use the trigger output 110

Contents

Saving and Recalling the Configuration 111

Using memories to save and recall configurations 111

To save a trace waveform 114

To recall a trace waveform 115

To clear a previously saved trace 116

To save the instrument setup 117

To recall the instrument setup 118

To reset the instrument setup 119

3 Solving Problems

If there is no trace display 123

If the trace display is unusual or unexpected 124

If you can’t see a channel 125

4 Ensuring Accurate Measurements

Time base and Acquisition 129

Probing the Circuit Under Test 139

Glitch Detection 143

5 Testing, Adjusting, and Troubleshooting the Analyzer

Testing the Analyzer 151

To perform self-tests 152

To test the keyboard 153

To test the display 154

To test the acquisition system 154

Building Test Accessories 155

To make the test connectors 156

To make the dummy load 158

Contents

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