Agilent Technologies Infiniium 90000 A User manual

Service Guide

Publication Number 54913-97022

March 2013

©Agilent Technologies, Inc. 2007-2013

Infiniium 90000 A-Series Oscilloscopes

Agilent Infiniium 90000 A-Series Oscilloscopes at a Glance

Ease of use with high performance

The Agilent Infiniium 90000 A-Series

oscilloscopes combine unprecedented ease-of-

use with high-performance digitizing

oscilloscope functionality tosimplifyyourdesign

and analysis measurement tasks.

• Traditional oscilloscope front-panel

interface provides direct access to the

controls needed for most troubleshooting

tasks.

• Graphical user interface with menus,

windows, dialogs, and toolbars provides

easy access to dozens of configuration and

analysis tools, ensuring you can set up and

make the most complex measurements.

• All models offer 40 GSa/s sampling rate on all

four channels.

• Models with bandwidths from 2.5 GHz to

13 GHz.

Display shows waveforms and graphical

user interface

• Graphical interface allows direct interaction

with waveforms, including drag-and-drop

positioning and instant waveform zoom.

• Touchscreen display allows oscilloscope

operation without an external pointing

device.

• Waveforms displayed in color, making

correlation easy.

• Current configuration parameters displayed

near the waveform display and are color-

coded to make identification easy.

• Graphical interface menus and toolbars

simplify complex measurement setups.

Horizontal controls set sweep speed and

position

• Main sweep speeds from 5 ps/div to 20 s/div.

• Zoom mode is from 1 ps/div to main time base

setting.

• Intensified waveforms on main sweep

window make it easy to see what will appear

in the zoom window.

Acquisition and general controls start and stop

the scope and do basic setup

• Run and stop controls for continuous or single

acquisitions.

• Clear display before one or more

acquisitions.

• Default setup and Autoscale set initial

configuration.

Hard disk drive and USB 2.0 port for saving and

restoring setups and measurement results

• Store measurement displays for inclusion in

reports and test setup guides.

• Store oscilloscope setups to repeat tests

another time.

• Hard disk stores oscilloscope operating

system.

Trigger setup controls set mode and basic

parameters

• Select Edge, Glitch, or Advanced Modes.

• Choose input source and slope.

• Use graphical user interface to simplify

configuration of pattern, state, delay, and

violation trigger modes.

• Use auxiliary trigger to increase triggering

flexibility.

Vertical controls set attenuation, and

position

• Input attenuation adjustable from 1 mV/div to

1 V/div.

• Color-coded knobs make it easy to find the

controls that affect each waveform.

Marker and quick measurements help

measure waveform parameters

• Waveform markers A and B to check voltage

or Δ-time at any point on the displayed

waveform.

In This Service Guide

This guide provides the service documentation for the Agilent Technologies 90000 A-Series

oscilloscopes. It is divided into seven chapters.

Chapter 1, "General Information," describes which oscilloscope models are covered by this

guide, environmental requirements, and oscilloscope dimensions.

Chapter 2, "Calibration," explains how and when you should run the user calibration procedure.

Chapter 3, "Testing Performance," provides information about testing the oscilloscope to verify

that it performs according to specifications.

Chapter 4, "Troubleshooting," provides information about how to identify defective assemblies.

Chapter 5, "Replacing Assemblies," provides instructions for removing and replacing defective

assemblies.

Chapter 6, "Replaceable Parts," provides exploded parts diagrams and a list for ordering

replaceable parts.

Chapter 7, "Theory of Operation," briefly describes the internal operation of the oscilloscope.

At the back of the book you will find safety notices.

Contents

1 General Information

Instruments covered by this service guide 8

Performance-Enhanced Versus Standard Models 9

Accessories supplied 10

Specifications and Characteristics 10

Environmental Conditions 11

Measurement Category 11

Oscilloscope Dimensions 12

2Calibration

To run the self calibration 15

3 Testing Performance

Performing Self-Test and Calibration 19

Offset Accuracy Test 21

DC Gain Accuracy Test 29

Analog Bandwidth - Maximum Frequency Check 35

Time Scale Accuracy (TSA) 42

Performance Test Record 45

4 Troubleshooting

To troubleshoot the oscilloscope 53

Primary Trouble Isolation 54

Power Supply Trouble Isolation 57

Under-Voltage Fault 60

Over-Temperature Fault 65

Over-Voltage Fault 68

Display Trouble Isolation 71

To check the backlight inverter voltages 73

To check the display board video signals 74

Front Panel Display Trouble Isolation 75

Front Panel Trouble Isolation 77

Motherboard Verification 78

To setup the BIOS 79

Acquisition/Backplane Assembly Trouble Isolation - Scope Self Tests 80

AutoProbe Board Trouble Isolation 83

To check the keyboard; Trouble Isolation Procedure 84

To check the LEDs 85

Software Revisions 86

To check probe power outputs 87

5 Replacing Assemblies

To return the oscilloscope to Agilent Technologies for service 91

To remove and replace the cover, top plate, and bottom plate 92

Contents

To remove and replace the front panel bezel and front panel circuit assembly 97

To remove and replace the on/off board 101

To remove and replace the backlight inverter board 103

To remove and replace the touch screen, the front deck, and the controller assembly 104

To remove and replace the motherboard 107

To remove and replace the acquisition boards/backplane assembly 108

To remove the backplane assembly from the acquisition assemblies 112

To set the calibration factors after replacing the acquisition board 113

To remove and replace the hard disk drive and the hard drive control board 115

Cable removal (for replacing the motherboard) 117

To remove and replace the power supply 122

To remove and replace the fans 123

To remove and replace the power cord 124

To remove and replace the USB or GPIB port 125

6 Replaceable Parts

Ordering Replaceable Parts 128

Exploded Views 129

Replaceable Parts List 133

7 Theory of Operation

Block-Level Theory 139

Instruments covered by this service guide 8

Accessories supplied 10

Specifications and Characteristics 10

Environmental Conditions 11

Measurement Category 11

Oscilloscope Dimensions 12

General Information

Instruments covered by this service guide

Oscilloscopes manufactured after the date this manual was released may be different from those

described in this manual. The release date of this manual is shown on the title page. This manual

will be revised when necessary.

If you have an oscilloscope that was manufactured after the release of this manual, please check

the Agilent Technologies website at www.agilent.com to see whether a newer version of this

manual is available.

The following 90000 A-Series oscilloscopes are covered in this guide.

Table 1 -1 Oscilloscopes Covered by this Service Guide

The oscilloscope model can be identified by the product number on the front or rear panel.

Model Bandwidth

DSO/DSA91304A 13 GHz bandwidth, 40 GSa/s

DSO/DSA91204A 12 GHz bandwidth, 40 GSa/s

DSO/DSA90804A 8 GHz bandwidth, 40 GSa/s

DSO/DSA90604A 6 GHz bandwidth, 20 GSa/s

DSO/DSA90404A 4 GHz bandwidth, 20 GSa/s

DSO/DSA90254A 2.5 GHz bandwidth, 20 GSa/s

Chapter 1: General Information

Performance-Enhanced Versus Standard Models

In the fall of 2009, Agilent started shipping performance-enhanced models of the 90000 A-Series

oscilloscope. This service guide covers both the standard and performance-enhanced versions

of the 90000 A-Series scopes. Any differences between the two versions are noted.

To tell whether the oscilloscope you have is a standard one or a performance-enhanced version,

check the front panel label. The performance-enhanced models have the works “Performance

Enhanced” on the label.

Chapter 1: General Information

Accessories supplied

The following accessories are supplied.

•Mouse

•Stylus

•Keyboard

• Accessory Pouch

• Front panel Cover

• Calibration Cable (not available or required for the DSO90254A)

• Precision 3.5 mm Adapters (qty 2)(not available or required for the DSO90254A)

• Probe De-skew and Performance Verification Kit, Agilent E2655B

• Power Cord (see parts list in chapter 6 for country-dependent part numbers)

• User's Quick Start Guide

Specifications and Characteristics

The following table contains a partial list of specifications and characteristics for the Agilent

Infiniium A-Series oscilloscopes. For a full list of specifications and characteristics, refer to the

data sheets at www.agilent.com/find/90000.

Specifications that are pertinent to each test are given in the "Testing Performance" chapter.

Specifications are valid after a 30-minute warm-up period, and within

C from the

temperature at which the last self-calibration was performed.

Environment Indoor use only.

Ambient

temperature

Operating 5

C to +40

C; non-operating –40

C to +65

Humidity Operating: up to 95% relative humidity (non-condensing) at +40

Non-operating: up to 90% relative humidity at +65 °C

Altitude Maximum operating altitude: 4,000 m (12,000 ft)

Installation Category Installation category: 2.

Power Requirements 100-240 V, 47-63 Hz; 800 W max for 4-channel models.

100-240 V, 50 Hz;100-208 V, 50/60 Hz; 800 W max for 8-channel models.

Voltage Fluctuations Note that the mains supply voltage fluctuations are not to exceed +/-10% of the

nominal supply voltage.

Table of contents

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