HP 54620A, 54620C User's And Service Manual

Advanced Test Equipment Rentals

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

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About this Manual

We’ve added this manual to the Agilent website in an effort to help you support
your product. This manual is the best copy we could find; it may be incomplete
or contain dated information. If we find a more recent copy in the future, we will
add it to the Agilent website.

Support for Your Product

Agilent no longer sells or supports this product. Our service centers may be able
to perform calibration if no repair parts are needed, but no other support from
Agilent is available. You will find any other available product information on the
Agilent Test & Measurement website,

www.tm.agilent.com.

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and
chemical analysis businesses are now part of Agilent Technologies. We have
made no changes to this manual copy. In other documentation, to reduce
potential confusion, the only change to product numbers and names has been in
the company name prefix: where a product number/name was HP XXXX the
current name/number is now Agilent XXXX. For example, model number
HP8648A is now model number Agilent 8648A.

User and Service Guide

Publication Number 54620-97011
October 1995 (pdf version Dec 1998)

For Safety Information, Warranties, and Regulatory information,
see the pages behind the Index.

© Copyright Hewlett-Packard Company 1994, 1995
All Rights Reserved

HP 54620A/C Logic Analyzer

The HP 54620A/C at a Glance

Display sh ows the current input s ignals
and much more

Up to sixteen (16) channels in normal

•

or delayed m ode
Indicators f or gl i tch or normal

•

acquisition, time base, channel
activity, trigger and acquisition status

Softkey labels

•

Measureme nt results

•

Color Palettes

•

Channel Cont rols select, position, and
label in puts

Turn channels on or off individuall y

•

or in groups of 8
Rearrange order of channels to

•

group relat ed signals
Create and dis pl ay labels to ident i fy

•

channels, and set channel col ors

General Controls measure, sav e and
restore res ult s, and configure the
analyzer

Measureme nt k eys provide

•

automatic si ngle or dual-chann el
time and fre quency measurement s,
or use cursors to make manual
measurements

Save or reca l l m easurement

•

configurati ons or previous results
Autoscale performs simple

•

one-button s etup of the analyzer

Horizontal Controls select sweep speed
and delay parameters

Sweep speeds from 5 ns/div to 1 s/div

•

Delay control moves waveform

•

display to point of interest
Delayed mo de and delay allow

•

zooming in t o show a portion of
waveform in detail (split screen)

Storage Keys begin and end data
acquisition

Run/Stop start s and stops continu ous

•

acquisitions
Single perform s one acquisition

•

Autostore accum ulates and displays

•

the results of multiple acquisit i ons
(like persistence on an oscilloscope)

Erase clears the current acquisi tion

•

and all accum ul ated data

Trigger Keys define what data will be
captured by th e analyzer

Edge mode all ow s triggering on a

•

positive or negative edge (or both) of
any single channel

Pattern mode a l l ow s triggering on a

•

pattern of cha nnel s either high, lo w ,
or don’t care , w i th a single edge
qualifier

Advanced mode allows sequential

•

triggers, c om bi ned patterns, patte rns
and edges, p att ern durations, and
edge occurre nce counts

Softkeys extend the functionality of
command keys

Select measurement types, operating
modes, trigger specifications, l abel data,
and more

Trigger Input/Output

Trigger the HP 54620A/C from other
instruments or use the HP54620A/C to
trigger other i nstruments

Channel Inputs through a flexible
probing system

Sixteen chan nel s through a dual

•

8-channel c abl e w i th micro-grabbers
Set logiclevel s as TTL, CMOS , EC L, or

•

to a user-def i nabl e voltage

2

Display Channel

Controls

General
Controls

Horizontal
Controls

Storage
Keys

Trigger
Keys

Softkeys

54620A

16 CHANNEL 500 MSa/s

Brightness
Control (for
HP 54620A
only)

LOGIC ANALYZER

Line

Power

Single
channel

Trace

Auto
scale

Trigger out

~5V

ov

Trigger
Input /
Output

Measure time

Save/Recall

Dual
channel

Setup

Display

CHANNEL

Select

On
Off

Position

Cursors

Print
Utility

150

Ext trigger in

1 MQ

+

40 V Max

STORAGE

Run

Single

Auto-

Erase

Stop

Entry

HORIZONTAL

Delay

Main
Delayed

Time/Div

Label

store

TRIGGER

Edge

Mode

Pattern

Adv

5 ns1 s

INPUTS

Logic
levels

Channel
Inputs

Micro-grabbe rs

3

In This Book

The

HP 54620A/C User and Service Guide

features of the Logic Analyzer in the design and troubleshooting of digital
system circuitry.

Chapter 1

basic measurements. It also gives an overview of basic analyzer operational
concepts including use and interpretation of the front panel and display.

Chapter 2

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

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

Chapter 4

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

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

various assemblies in the analyzer. The chapter also lists the replaceable
parts for the analyzer and gives ordering information.

Chapter 7

performance standards to which the instrument is tested.

Chapter 8

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

Programmer’s Reference

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.

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

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

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

, “Ensuring Accurate Measurements,” explains the relationships

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

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

, “Performance Characteristics,” lists the measurement

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

HP 54620A/C Programmer’s Guide

. The

Programmer’s Reference

is your guide to using the

and the

HP 54620A/C

is supplied as a

4

Getting Started

1

Making Analyzer

2

Measurem ents

Solv ing Proble ms

3

Ensuring A ccurate

4

Measurem ents

Testing, A djusting, and

5

Troubleshooting the Analyzer

Replaceab le Parts

6

Performance Characteristics

7

Messages

8

Glossary

Index

5

6

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

7

Contents

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

8

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

Contents

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

9

Contents

Adjusting the Logic Analyzer 159

To adjust the power supply 160
To adjust the display (HP 54620A only) 162

Troubleshooting the Logic Analyzer 164

To troubleshoot the logic analyzer 165
To check the LVPS 168

Testing Threshold Accuracy 169

Step 1. To set up the equipment 170
Step 2. To connect the logic analyzer 171
Step 3. To test the thresholds 172

Testing Time Interval Accuracy 173

Step 1. To connect the logic analyzer 174
Step 2. To set up the equipment 175
Step 3. To set up the logic analyzer 176
Step 4. To make the measurement 177

6 Replaceable Parts

Removing and Replacing Assemblies 181

To remove the cabinet 182
To remove the fan 183
To remove the front panel 184
To remove the display 185
To remove the system board 186
To remove the power supply 187
To remove the keyboard 188
To remove the handle 189

Replaceable Parts 190

To order a replacement part 191

10

7 Performance Characteristics

8 Messages

Messages 209

Contents

Glossary

Index

217

225

HP 54620 Documentation

239

11

12

Figures

Figure 1. Using the Logic Analyzer 19
Figure 1A. Refining the Trigger Specification 20
Figure 2. Items Supplied with the HP 54620A/C Logic Analyzer 23
Figure 3. Optional Accessories for the HP 54620A/C Logic Analyzer 25
Figure 4. HP 54620A Brightness Control 29
Figure 5. HP 54620C with Label Menu Selected and Single Channel

Highlighted 34
Figure 6. HP 54620A Logic Analyzer Front Panel 36
Figure 7. HP 54620A/C Display 38
Figure 8. Sample Autoscale Measurement 44
Figure 9. Edge Trigger on Channel 0 47
Figure 10. Logic Threshold Setup 53
Figure 11. Waveform Display with Auto Glitch Detect Enabled 57
Figure 12. HP 54620A/C Label Definition Display 61
Figure 13. Pattern Trigger Setup 67
Figure 14. Advanced Trigger Setup (with Overview On) 68
Figure 15. Advanced Trigger Softkeys for Operators with Two Sources 69
Figure 16. Acquisition Memory 70
Figure 17. Pulse Train with Constant-Duration Pulse 77
Figure 18. Sequential Output from State Machine 77
Figure 19. System Failure on Third Keystroke 78
Figure 20. Delayed Sweep 81
Figure 21. Time Reference at Center, Delay of 15 µs on Main Sweep 84
Figure 22. Delayed Sweep with Delay of 8 µs 85
Figure 23. Measuring the Period of an Irregular Waveform 90
Figure 24. Single-Channel Measurements 91
Figure 25. Channel-to-Channel Delay Measurement 92
Figure 26. Measurement Within the Delayed Sweep Window 93
Figure 27. Setup Time Measurement 101
Figure 28. Hold Time Measurement 103
Figure 29. Connections for External Trigger from an Emulator 105
Figure 30. Connections for External Trigger using an Oscilloscope Probe 106
Figure 31. Connections for Triggering an Oscilloscope 107
Figure 32. Using the External Trigger Input as an Edge Trigger 109

13

Contents

Figure 33. Trace Memory Save/Recall 112
Figure 34. Setup Memory 113
Figure 35. Relationship Between Time base and Analyzer Functions 129
Figure 36. Acquisition Memory 131
Figure 37. Memory Bar 132
Figure 38. Single Acquisition, Time Reference Center, Positive

Delay of 75 µs 134

Figure 39. Panning the Display to View the Start of Acquisition 135
Figure 40. Single Acquisition, Time Reference Right, Negative

Delay of 80 µs 136

Figure 41. Panning the Display to View the Trigger Point 137
Figure 42. DC and Low-Frequency Probe Equivalent Circuit 139
Figure 43. High-Frequency Probe Equivalent Circuit 140
Figure 44. Impedance versus Frequency for Both Probe Circuit Models 140
Figure 45. Common Mode Input Voltage Model 141
Figure 46. Glitch Display 144
Figure 47. Aliasing 144
Figure 48. Reconstruction of Waveform with Glitch Capture 145
Figure 49. Waveform Display with Sampling Rate Too Low 146
Figure 50. Waveform Display with Sufficient Sampling Rate 147
Figure 51. Data Output Relative to Clock 148
Figure 52. 8-by-2 Connector Setup 156
Figure 53. 1-by-2 Connector Setup 157
Figure 54. Power Supply Adjustment 161
Figure 55. Display Adjustment 163
Figure 56. Threshold Test Setup 171
Figure 57. Time Interval Accuracy Setup 174
Figure 58. Front Panel Removal 184
Figure 59. Unhooking the Power Switch Shaft 187
Figure 60. Exploded View of Logic Analyzer 192

14

Tables

Table 1. Power Cords 26
Table 2. Color Palettes and Mapping of Colors to Display Components 32
Table 3. Threshold Voltage Settings 54
Table 4. Trigger Operators and Sources 75
Table 5. Readout Settings 95
Table 6. HP 54620A/C Factory-Preset Default Configuration Settings 119
Table 7. Sweep Speed and Sampling Interval 130
Table 8. Materials Required (Making Test Connectors) 156
Table 9. Equipment Required (Adjusting Power Supply) 160
Table 10. Equipment Required (Adjusting Display) 162
Table 11. Equipment Required (Troubleshooting Logic Analyzer) 164
Table 12. Display Signals 166
Table 13. Equipment Required (Testing Threshold Accuracy) 169
Table 14. Threshold Test Settings 172
Table 15. Equipment Required (Testing Time Interval Accuracy) 173
Table 16. HP 54620A/C Replaceable Parts 193
Table 17. Input channels 197
Table 18. Horizontal System 198
Table 19. Acquisition System 199
Table 20. Trigger System 200
Table 21. Display System 202
Table 22. Measurement Functions 202
Table 23. Setup Functions 203
Table 24. Power Requirements 203
Table 25. General Characteristics for HP 54620A Only 204
Table 26. General Characteristics for HP 54620A and HP 54620C 205
Table 27. General Characteristics for HP 54620C Only 206

15

16

1

Getting Started

Getting Started

When you use the logic analyzer to help test and troubleshoot your
systems, you will follow the general process shown in figure 1:

• Prepare the analyzer by connecting it to power and setting up the

handle and screen brightness as desired.

• Define the measurement problem by understanding the parameters

of the system you wish to test and the expected system behavior.

• Set up channel inputs by connecting the data probes to the

appropriate signal and ground nodes in the circuit under test.

• Define the trigger condition by setting the analyzer configuration to

capture only the system events you wish to view.

• Use the analyzer to acquire data, either in continuous or single-shot

fashion.

• Examine the data and make measurements on it using various

analyzer features.

• Save the measurement or configuration for later re-use or

comparison with other measurements.

The process is repeated as necessary until you verify correct
operation or find the source of the problem.

18

Figure 1

Getting Started

Using the Logic Analyzer

19

Figure 1A

Getting Start ed

The high-speed display of the HP 54620A/C can be used to isolate
infrequently changing signals. You can then use the characteristics of
these signals to help refine the trigger specification. See the figure
below.

Refining the Tr i gger Specification

This chapter discusses analyzer preparation and probe setup, and
contains a general introduction to trigger definition and data
acquisition. For more information on triggering, data acquisition, data
examination and measurement, and configuration, see chapter 2,
“Making Analyzer Measurements.”

20

Preparing the Analyzer

To prepare your logic analyzer for use, you need to do the following:

1

Check to ensure that you received everything that is supplied with
the analyzer.

2

Connect the analyzer to power and switch it on.

3

Connect the probe cable to the analyzer and connect probes to the
circuit of interest. (You can use the front panel calibration test point
as a stimulus while learning to use the analyzer.)

The following pages show you how to do each of these tasks. After you
have completed them, you will be ready to use the analyzer.

21

Getting Start ed

To check pack age contents

To check package contents

•

Verify that you received the following items in the HP 54620A/C
packaging.

See figure 2. If anything is missing, contact your nearest Hewlett-Packard
Sales Office. If the shipment was damaged, contact the carrier, then contact
the nearest Hewlett-Packard Sales Office.

HP 54620A/C Logic Analyzer.

Power cord (see table 1).

HP 54620-61801 16-channel probe cable.

HP 5090-4356 grabbers (in resealable plastic bag; quantity 20).

HP 5959-9334 2" ground lead set (quantity 5).

HP 54620A/C User’s Guide.

HP 54620A/C Programmer’s Guide.

HP 54620A/C Programmer’s Reference (3.5" diskette).

22

Figure 2

HP 54620A/C
Logic Analyzer

HP 54620-61801
16-Channel Cable
(leads attached; with labels)

Getting Started

To check pac kage contents

!

HP 5959-9334
2" Ground Lead Set (5)

Power Cord
(Varies depending on country)

HP 5090-4356
Grabber (20)

HP 54620A/C User's Guide

HP 54620A/C Programmer's Guide

Items Supplied with the HP 54620A/C Logic A nal yzer

HP 54620A/C
Programmer's Reference

pkg-cnts.cdr

23

Getting Start ed

To check optional accessories

To check optional accessories

•

Verify that you received the optional accessories you ordered.

See figure 3. If anything is missing, contact your nearest Hewlett-Packard
Sales Office. If the shipment was damaged, contact the carrier, then contact
the nearest Hewlett-Packard Sales Office.

Option 101—Front panel dust cover and accessory pouch.

Option 103—HP 54654A Operator’s self-paced Training Kit, including
case, manual, and circuit board with battery.

Option 104—HP 5041-9409 Carrying Case (useful for protecting the
instrument in shipment or when checked as airline baggage).

Option 106—HP 34801A BenchLink software for Microsoft Windows
(provides an interface to the instrument from any Windows-compatible
PC, allowing the user to save and restore setups and capture
measurements for further review).

Option 001—RS-03 Magnetic Shielding for CRT (HP 54620A only)
(not shown in figure 3).

Option 1CM—Rackmount kit (allows mounting the HP 54620A/C in an
EIA-standard rack). This kit is not shown in figure 3.

24

Figure 3

Getting Started

To check optional accessories

Optional Accessories for the HP 54620A/C Logic Analyzer

25

Table 1
Power Cords

Getting Start ed

To check optional accessories

Plug Type Cable Part

No.

Opt 903 (U.S.A.)
124V **

Opt 900 ( U.K.)
250V

Opt 901 (A ustralia)
250V

Opt 902 (Eur ope)
250V

Opt 906 (S w i tz erland)
250V

Opt 912 (D enm ark)
220V

8120-13 78 Straight (NEMA5-15P*) 90/228 Jade Gray

8120-1351 Straight (BS136A*) 90/228 Gray

8120-1369 Straight

8120-1689
8120-2857

8120-2104 Straight (SEV1011*) 79/200 Mint Gray

8120-29 57 Straight (DHCK107*) 79/200 Mint Gray

Plug Description Length

in/cm

(NZSS198/ASC*)

Straight (CEE7-Y11*)
Straight (S hi el ded)

79/200 Gray

79/200
79/200

Color

Mint Gray
Coco Brown

Opt 917 (Africa)
250V

Opt 918 (Japan)
100V

* Part number shown for plug is industry identifier for plug only.
Number shown for cable is HP part numb er for comple te cable including plug.
** These cords are included in the CSA certi fication approval for the equipment.

8120-4600 Straight (SABS164) 79/200 Jade Gray

8120-4753 Straight Miti 90/230 Dark Gray

26

To power-on the logic analyzer

1

Connect the power cord to the rear of the
HP 54620A/C, then to a suitable ac voltage source.

2

Press the power switch.

Getting Started

To power-on the logic analyzer

The HP 54620A/C power supply
automatically adjusts for input line voltages
in the range 100 to 240 VAC. Therefore, you
do not need to adjust the input line voltage
setting. The line cord provided is matched
by HP to the country of origin of order.
Ensure that you have the correct line cord.
See table 1.

The HP 54620A/C performs a self-test, then
shows the display. The instrument is ready
to use.

27

Getting Start ed

To adjust the handle

To adjust the handle

1

Grasp the handle pivot points on each side of the
instrument and pull the pivot out until it stops.

2

Without releasing the pivots, swivel the handle to
the desired position. Then release the pivots.

28

Figure 4

Getting Started

To adjust d is play brightness

To adjust display brightness

•

To decrease display brightness, rotate the brightness control
counterclockwise.

•

To increase display brightness, rotate the brightness control
clockwise.

The brightness control is at the lower left corner of the display. See figure 4.

HP 54620A Brightness Control

The "A" model includes a brightness control. There is no brightness control
on the HP 54620C.

29