Agilent Technologies 54621A User manual

Service Guide

Publication Number 54622-97037

December 2002

For Safety Information, arranties, and Regulatory information, see the pages

at the end of this book.

Agilent 54621A/22A/24A

Oscilloscope and

Agilent 54621D/22D

Mixed-Signal Oscilloscope

service.book Page i Wednesday, December 18, 2002 8:35 AM

The Oscilloscope At a Glance

Choosefromavarietyofoscilloscopes forcapturing

long, non-repeating signals

with 200 MSa/s sample rate and 2 MBytes of

MegaZoom deep memory per channel.

•Agilent 54621A - 2-channel, 60-MHz bandwidth

•Agilent54621D -2-channel+16logicchannels,60-

MHz bandwidth

•Agilent 54622A - 2-channel, 100-MHz bandwidth

•Agilent 54622D - 2-channel +16 logic channels,

100-MHz bandwidth

•Agilent 54624A - 4-channel, 100-MHz bandwidth

Display shows current input signals

• All analog and digital (54621D/22D) channels

displayed in main and delayed mode

• Indicators for channel, time base, digital (54621D/

22D) channel activity, trigger and acquisition

status

• Softkey labels

• Measurement results

Digital channel controls select, position, and label

inputs (54621D/22D)

• Turn channels on or off individually or in groups

of 8

• Rearrange order of channels to group related

signals

• Create and display labels to identify channels

Run control keys begin and end data acquisition

• Run/Stop starts and stops continuous

acquisitions

• Single performs one acquisition

• Infinitepersistenceaccumulatesanddisplaysthe

results of multiple acquisitions

Horizontal Controls select sweep speed and delay

parameters

• Sweep speeds from 5 ns/div to 50 ns/div

• Delay control moves waveform display to point of

interest

• Delayed mode and delay allowzoomingin toshow

a portion of waveform in detail (split screen)

Trigger keys define what data the oscilloscope will

trigger on

• Source key allows conventional oscilloscope

triggering

• Modes include Edge, Pulse Width, Pattern, CAN,

Duration, I2C, LIN, Sequence, SPI, TV, and USB

triggering

General controls measure, save and restore results,

and configure the oscilloscope

• Waveform math including FFT, subtract, multiply,

integrate, and differentiate

• Use Quick Meas to make automatic

measurements Integrated counter included with

Quick Meas.

• Use cursors to make manual measurements

• Save or recall measurement configurations or

previous results

• Autoscale performs simple one-button setup of

the oscilloscope

Softkeys extend the functionality of command keys

Selectmeasurementtypes,operatingmodes,trigger

specifications, label data, and more

Digital channel inputs through a flexible probing

system (54621D/22D)

• Sixteen channels through a dual 8-channel cable

with micro-clips

• Set logic levels as TTL, CMOS, ECL, or to a user-

definable voltage

Utilities

• Dedicated parallel printer port, controller

operation, floppy disk storage

Built in Quick Help system

• Press and hold any key front-panel key or softkey

to get help in 11 languages.

service.book Page ii Wednesday, December 18, 2002 8:35 AM

iii

In his Book

This book provides the service information for the Agilent 54621A/22A/24A

Oscilloscope and the Agilent 54621D/22D Mixed-Signal Oscilloscope.

This manual is divided into these chapters:

Chapter 1 provides general information and specifications.

Chapter 2 shows you how to prepare the oscilloscope for use.

Chapter 3 gives performance tests.

Chapter 4 covers calibration and adjustment procedures.

Chapter 5 provides troubleshooting information.

Chapter 6 gives the procedures and techniques for replacing assemblies and

other parts.

Chapter 7 includes a list of replaceable parts, part ordering information, and

shipping information.

At the back of the book you will find Safety information, arranties, and

Regulatory information.

service.book Page iii Wednesday, December 18, 2002 8:35 AM

service.book Page iv Wednesday, December 18, 2002 8:35 AM

Contents

Contents-1

1 General Information

To inspect package contents 1-3

To inspect options and accessories 1-6

Performance Characteristics 1-9

2 Preparing the Oscilloscope for Use

Setting up the Oscilloscope 2-3

To adjust the handle 2-4

To power-on the oscilloscope 2-5

To adjust the display intensity 2-6

To connect the oscilloscope probes 2-7

To compensate your probe 2-7

To use the digital probes (mixed-signal oscilloscope only) 2-8

To connect a printer 2-12

To connect an RS-232 cable 2-12

To verify basic oscilloscope operation 2-13

Getting started using the oscilloscope interface 2-14

Using Quick Help 2-16

Selecting a language for Quick Help when the oscilloscope starts up 2-16

Selecting a language for Quick Help after you have been operating the

oscilloscope 2-17

Loading a language from floppy disk 2-18

Cleaning the oscilloscope 2-19

3 Testing Performance

List of Test Equipment 3-3

To construct the test connector 3-4

To test the 54621D/22D Oscilloscope digital channels 3-5

To verify threshold accuracy 3-6

To verify voltage measurement accuracy 3-10

To verify bandwidth 3-13

To verify horizontal Dt and 1/Dt accuracy 3-15

To verify trigger sensitivity 3-17

Agilent 54622A/22D/24A Performance Test Record 3-20

Agilent 54621A/21D Performance Test Record 3-21

service.book Page 1 Wednesday, December 18, 2002 8:35 AM

Contents

Contents-2

4 Calibrating an A justing

To adjust the power supply 4-4

To perform User Cal 4-7

To adjust the oscilloscope display 4-8

5 Troubleshooting

Solving General Problems with the Oscilloscopes 5-3

If there is no trace display 5-3

If the trace display is unusual or unexpected 5-4

If you cannot see a channel 5-5

roubleshooting the Oscilloscope 5-6

To construct your own dummy load 5-7

To check out the oscilloscope 5-8

To check the Low Voltage Power Supply 5-11

To run the internal self-tests 5-13

6 Replacing Assemblies

To remove the cabinet 6-4

To remove the fan 6-5

To remove the floppy drive 6-6

To remove the front panel 6-7

To remove the display 6-8

To remove the system board 6-10

To remove the power supply 6-12

To remove the keyboard assembly 6-15

To remove the handle 6-16

7 Replaceable Parts

To order a replacement part 7-3

service.book Page 2 Wednesday, December 18, 2002 8:35 AM

General Information

service.book Page 1 Wednesday, December 18, 2002 8:35 AM

1-2

General Information

This chapter lists general information for the Agilent 54620-series

Oscilloscopes. It also includes performance characteristics and

specifications for the oscilloscopes.

service.book Page 2 Wednesday, December 18, 2002 8:35 AM

1-3

General Information

o inspect package contents

❏Inspect the shipping container for damage.

If your shipping container appears to be damaged, keep the shipping container

or cushioning material until you have inspected the contents of the shipment

for completeness and have checked the oscilloscope mechanically and

electrically.

❏Verify that you received the following items and any optional accessories in

the oscilloscope packaging (see figure following).

• 54620-Series Oscilloscope (54621A, 21D, 22A, 22D, or 24A)

• 10074C 10:1 150 MHz passive probes with ID:

(2) for 54621A, 21D, 22A, or 22D oscilloscopes

(4) for 54624A oscilloscope

• 54620-68701 digital probe kit (for 54621D or 22D)

• Accessory pouch and front-panel cover (standard for 54622A, 22D, and 24A)

(optional on 54621A and 21D; order N2726A)

• Power cord (see table 1-3)

• IntuiLink for 54600-series Oscilloscopes software and RS-232 cable (for

54622A, 22D, or 24A).

IntuiLink is a indows application that makes it very easy for you to

download images, waveform data, or oscilloscope setups from the

oscilloscope to your pc using either Microsoft ord or Microsoft Excel. After

installation of IntuiLink, a tool bar in these Microsoft applications will make

connection and data transfer from the oscilloscope very simple.

IntuiLink software is available free on the web at:

www.agilent.com/find/5462xsw

RS-232 cable may be ordered separately, part number 34398A

If anything is missing, contact your nearest Agilent Sales Office. If the shipment

was damaged, contact the carrier, then contact the nearest Agilent Sales Office.

service.book Page 3 Wednesday, December 18, 2002 8:35 AM

1-4

General Information

• Agilent IntuiLink Data Capture (for 54622A, 22D, or 24A)

IntuiLink Data Capture is a standalone program for downloading waveform

data from the oscilloscopes to your PC via GPIB or RS-232 interface. It

provides the capability to transfer deep memory data out of the oscilloscope,

allowing up to 4MB (scope channels) and 8MB (logic channels). The

IntuiLink for 54600-Series limits the size of acquisition data available to a

maximum of 2,000 points regardless of actual number of acquisition points

on the screen. ith the IntuiLink Data Capture, the amount of points

transferred will be the actual number of acquisition points currently

displayed or you may select the number of points to download. It provides

the following functionality:

• Download waveform data and display the data as a simple chart

• Save the data as binary or text files

• Copy the chart and a selected portion of the data to the clipboard. The

maximum data saved to the clipboard is 50,000 point

• Load saved waveform data back into the application

IntuiLink Data Capture software is available free on the web at:

www.agilent.com/find/5462xsw

RS-232 cable may be ordered separately, part number 34398A

❏Inspect the oscilloscope

• If there is mechanical damage or a defect, or if the oscilloscope does not

operate properly or does not pass the performance tests listed in the Service

Guide, notify your Agilent Sales Office.

• If the shipping container is damaged, or the cushioning materials show signs

of stress, notify the carrier and your Agilent Sales Office. Keep the shipping

materials for the carrier’s inspection. The Agilent Sales Office will arrange

for repair or replacement at Agilent’s option, without waiting for claim

settlement.

service.book Page 4 Wednesday, December 18, 2002 8:35 AM

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