Tektronix TDS7254, TDS7404, TDS7154, CSA7154, CSA7404 Service Manual

Service Manual

CSA7000 Series Communication Signal Analyzers &
TDS7000 Series Digital Phosphor Oscilloscopes
(CSA7404, CSA7154, TDS7404, TDS7254, & TDS7154)

071-7011-02

This document applies to firmware version 2.3.2
and above.

Warning

The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.

www.tektronix.com

Copyright © Tektronix, Inc. All rights reserved.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If this product proves defective during its
warranty period, Tektronix, at its option, will either repair the defective product without charge for parts and labor,
or provide a replacement in exchange for the defective product.

This warranty applies only to products returned to the designated Tektronix depot or the Tektronix authorized
representative from which the product was originally purchased. For products returned to other locations,
Customer will be assessed an applicable service charge. The preceding limitation shall not apply within the
European Economic Area, where products may be returned for warranty service to the nearest designated service
depot regardless of the place of purchase.

In order to obtain service under this warranty, Customer must provide the applicable office of Tektronix or its
authorized representative with notice of the defect before the expiration of the warranty period and make suitable
arrangements for the performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix or its representative, with shipping charges
prepaid. Tektronix or its representative shall pay for the return of the product to Customer. Customer shall be
responsible for paying any associated taxes or duties.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty:

a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or

service the product;

b) to repair damage resulting from improper use or connection to incompat ible equipment;

c) to repair any damage or malfunction caused by the use of non-Tektronix supplies or consumables;

d) to repair a product that has been modified or integrated with other products when the effect of such

modification or integration increases the time or difficulty of servicing the product; or

e) to repair damage or malfunction resulting from failure to perform user maintenance and cleaning at the

frequency and as prescribed in the user manual (if applicable).

THE ABOVE WARRANTIES ARE GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF

ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY

IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’

RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE

REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS

VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE

POSSIBILITY OF SUCH DAMAGES.

Table of Contents

Specifications

Operating Information

General Safety Summary xi...................................

Service Safety Summary xiii....................................

Preface xv...................................................

Manual Structure xv................................................

Manual Conventions xv..............................................

Related Documentation xvi...........................................

Contacting Tektronix xvii.............................................

Product and Feature Description 1--1....................................

Acquisition Features 1--2..........................................

Signal Processing Features 1--2.....................................

Display Features 1--3.............................................

Measurement Features 1--3.........................................

Trigger Features 1--3..............................................

Convenience Features 1--4.........................................

Specification Tables 1--5..............................................

Installation 2--1.....................................................

Before You Start 2--1.............................................

Environmental Considerations 2--1..................................

Connect the Peripherals 2--2........................................

Power On the Instrument 2--4.......................................

Powering Off the Instrument 2--5....................................

Create an Emergency Startup Disk 2--5...............................

Software Installation 2--6..........................................

Operating Information 2--7............................................

Back Up User Files 2--7...........................................

User Interface Map 2--7...........................................

Front Panel Controls Map 2--9......................................

Front Panel I/O Map 2--10..........................................

Instrument Diagnostics 2--11........................................

Signal Path Compensation 2--11.....................................

Using the Online Help 2--11.........................................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

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Table of Contents

Theory of Operation

Logic Conventions 3--1...............................................

Module Overviews 3--1...............................................

Performance Verification

Conventions 4--2....................................................

Brief Procedures 4--5...........................................

Self Tests 4--5.......................................................

Functional Tests 4--6.................................................

Performance Tests 4--17.........................................

Prerequisites 4--17....................................................

Equipment Required 4--18..............................................

CSA7000 & TDS7000 Test Record 4--21..................................

Signal Acquisition System Checks 4--35...................................

Time Base System Checks 4--73.........................................

Trigger System Checks 4--80............................................

Output Signal Checks 4--88.............................................

Serial Trigger Checks 4--96.............................................

Optical-to-Electrical Converter Checks (CSA7000 Series Only) 4--107...........

General 3--1....................................................

Input Signal Path 3--1.............................................

Display Panel 3--2................................................

Front Panel 3--2..................................................

Rear Panel 3--3..................................................

Low Voltage Power Supply 3--3.....................................

Fans 3--3.......................................................

Verify Internal Adjustment, Self Compensation, and Diagnostics 4--5.......

Verify All Input Channels 4--7......................................

Verify the Time Base 4--10..........................................

Verify the A (Main) and B (Delayed) Trigger Systems 4--12...............

Verify the File System 4--13.........................................

Check DC Voltage Measurement Accuracy 4--35........................

Check DC Gain Accuracy 4--39......................................

Check Offset Accuracy 4--50........................................

Check Maximum Input Voltage 4--54.................................

Check Analog Bandwidth 4--58......................................

Check Delay Between Channels 4--63.................................

Check Channel Isolation (Crosstalk) 4--67.............................

Check Input Impedance 4--71........................................

Check Long-Term Sample Rate and Delay Time Accuracy and

Reference 4--73............................................

Check Delta Time Measurement Accuracy 4--77........................

Check Time Accuracy for Pulse, Glitch, Timeout, and

Width Triggering 4--80......................................

Check Sensitivity, Edge Trigger, DC Coupled 4--83......................

Check Outputs — CH 3 Signal Out and Aux Trigger Out 4--89.............

Check Probe Compensation Output 4--92..............................

Check Serial Trigger Baud Rate Limits and Word Recognizer

Position Accuracy 4--96.....................................

Check Serial Trigger Clock Recovery Range 4--103.......................

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Adjustment Procedure

Maintenance

Table of Contents

Check Dark Level Calibration 4--107..................................

Check Maximum Optical-to-Electrical Noise 4--109......................

Check Optical-to-Electrical Gain 4--111................................

Sine Wave Generator Leveling Procedure 4--119.............................

Adjustment Procedures 5--1.....................................

Adjustment Interval 5--1...........................................

Adjustment After Repair 5--1.......................................

Adjustment 5--1.................................................

Preventing ESD 6--1.................................................

Inspection and Cleaning 6--2...........................................

General Care 6--2................................................

Cleaning Optical Connectors 6--2...................................

Interior Cleaning 6--3.............................................

Exterior Cleaning 6--4............................................

The display is a soft plastic display and must be treated with care

during cleaning. 6--4.......................................

Removal and Installation Procedures 6--9.........................

Preparation 6-- 9.....................................................

Procedures for External Modules 6--11....................................

Procedures for Modules 6--23...........................................

Troubleshooting 6--61...........................................

Service Level 6--61...................................................

Check for Common Problems 6--61......................................

Equipment Required 6--63..............................................

Fault Isolation Procedure 6--63..........................................

PPC and NLX PC Diagnostics 6--68......................................

Software Updates 6--72................................................

After Repair 6--73....................................................

BIOS Error Messages (Radisys NLX) 6--73................................

BIOS Beep Codes (Radisys NLX) 6--76...................................

Dip Switch Controls 6 --76..............................................

Diagnostic LED 6--77.................................................

Troubleshooting Using Reset Circuits 6--79................................

Update/Restore the NLX Board CMOS 6--81...............................

Installing an Authorization Key 6--82.....................................

Hard Disk Drive Maintenance 6--83......................................

Repackaging Instructions 6--85...................................

Packaging 6--85......................................................

Shipping to the Service Center 6--85......................................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

iii

Table of Contents

Options

Electrical Parts List

Diagrams

Mechanical Parts List

Options 7--1........................................................

Accessories 7--2.....................................................

Electrical Parts List 8--1........................................

Symbols 9--1.......................................................

Parts Ordering Information 10--1.........................................

Module Servicing 10--1............................................

Using the Replaceable Parts List 10--2....................................

Abbreviations 10--2...............................................

Mfr. Code to Manufacturer Cross Index 10--2...........................

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

List of Figures

Table of Contents

Figure 2--1: Locations of peripheral connectors on rear panel 2--3.....

Figure 2--2: Line fuse and power cord connector locations,

rear panel 2-- 4.............................................

Figure 2-- 3: On/Standby switch location 2-- 5.......................

Figure 4--1: Toolbar and menu bar (CSA7000 Series shown) 4--3......

Figure 4--2: Universal test hookup for functional

tests -- CH 1 shown 4--8.....................................

Figure 4-- 3: Channel button location 4-- 8..........................

Figure 4--4: Setup for time b ase test 4--10...........................

Figure 4--5: Setup for trigger test 4--12.............................

Figure 4--6: Setup for the file system test 4--14.......................

Figure 4--7: Initial test hookup 4--36...............................

Figure 4--8: Measurement of DC accuracy at maximum

offset and position 4--38......................................

Figure 4--9: Initial test hookup 4--40...............................

Figure 4--10: Measurement of DC gain accuracy 4--49................

Figure 4--11: Initial test hookup 4--51..............................

Figure 4--12: Measurement of offset accuracy 4--53...................

Figure 4--13: Initial test hookup 4--55..............................

Figure 4-- 14: Check of maximum input voltage 4-- 57.................

Figure 4--15: Initial test hookup 4--59..............................

Figure 4--16: Measurement of analog bandwidth 4--61................

Figure 4--17: Initial test hookup 4--64..............................

Figure 4--18: Measurement of channel delay 4--65...................

Figure 4--19: Initial test hookup 4--67..............................

Figure 4--20: Initial test hookup 4--71..............................

Figure 4--21: Initial test hookup 4--73..............................

Figure 4--22: Initial test hookup 4--74..............................

Figure 4--23: Final test hookup 4--75...............................

Figure 4--24: Delta time accuracy test hookup 4--77..................

Figure 4--25: Initial test hookup 4--81..............................

Figure 4--26: Measurement of time accuracy for pulse and

glitch triggering 4--82........................................

Figure 4--27: Initial test hookup 4--84..............................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

v

Table of Contents

Figure 4--28: Measurement of trigger sensitivity -- 50 MHz

results shown 4--85..........................................

Figure 4--29: Initial test hookup 4--89..............................

Figure 4--30: Measurement of trigger out limits 4--91.................

Figure 4--31: Initial test hookup 4--92..............................

Figure 4--32: Measurement of probe compensator frequency 4--93......

Figure 4-- 33: Subsequent test hookup 4-- 94.........................

Figure 4--34: Measurement of probe compensator amplitude 4--95......

Figure 4--35: Initial test hookup 4--96..............................

Figure 4--36: Isolated 0 triggering 4--98............................

Figure 4--37: Isolated 1 triggering 4--100............................

Figure 4--38: N modulo 3 triggering 4--102...........................

Figure 4--39: Initial test hookup 4--103..............................

Figure 4--40: Clock recovery 4--106.................................

Figure 4--41: Initial test hookup 4--107..............................

Figure 4--42: Initial test hookup 4--109..............................

Figure 4--43: Initial test hookup 4--111..............................

Figure 4--44: Optical bandwidth hookup 4--116......................

Figure 4--45: Proper positioning of the impulse 4--117.................

Figure 4--46: Optical impulse response 4--118........................

Figure 4-- 47: Sine wave generator leveling equipment setup 4-- 119......

Figure 4--48: Equipment setup for maximum amplitude 4--121.........

Figure 6--1: Line fuse and line cord removal 6--12...................

Figure 6--2: Knob removal 6--13..................................

Figure 6--3: Trim removal 6--15...................................

Figure 6--4: Bottom cover removal 6--16............................

Figure 6--5: Cover removal 6--18..................................

Figure 6--6: Cover removal 6--19..................................

Figure 6--7: External modules 6--20................................

Figure 6-- 8: Internal modules 6-- 21................................

Figure 6--9: Front-panel assembly removal 6--24.....................

Figure 6--10: J1 flex cable connector removal 6--25...................

Figure 6--11: Front panel board and keyboard removal 6--26..........

Figure 6--12: Display removal 6--28................................

Figure 6--13: Touch panel and LCD assembly removal 6--29...........

Figure 6--14: Display adaptor board removal 6--30...................

Figure 6--15: Cable clip removal 6--30..............................

Figure 6--16: Power flex circuit removal 6--32.......................

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Table of Contents

Figure 6--17: Floppy disk drive removal 6--33.......................

Figure 6--18: Hard disk drive removal 6--35.........................

Figure 6--19: Removing the hard disk drive from the cartridge 6--35....

Figure 6--20: CD drive and bracket removal 6--37....................

Figure 6--21: Fan assembly removal 6--38...........................

Figure 6--22: Front and rear power distribution and

PA bus boards removal 6--40..................................

Figure 6-- 23: Low-voltage power supply removal 6--41................

Figure 6--24: NLX battery removal 6--42...........................

Figure 6--25: NLX assembly removal 6-- 45..........................

Figure 6--26: Riser adapter and NLX board removal 6--47............

Figure 6--27: Microprocessor removal 6--49.........................

Figure 6--28: PPC Processor board removal 6--51....................

Figure 6--29: Acquisition circuit board removal 6--53.................

Figure 6--30: Front panel combination assembly removal 6--54.........

Figure 6-- 31: TekConnect board and TekConnect

bucket removal 6--55........................................

Figure 6--32: Acquisition circuit board removal 6--58.................

Figure 6--33: Front panel combination assembly removal 6--59.........

Figure 6-- 34: TekConnect board and TekConnect

bucket removal 6--60........................................

Figure 6--35: Primary troubleshooting tree 6--64.....................

Figure 6--36: Location of power-on and over current L EDs 6--65.......

Figure 6--37: Location of debug pins 6--66..........................

Figure 6--38: Connectors J1 and J2 6--67...........................

Figure 6--39: The three PCI busses 6--79...........................

Figure 6--40: PCI and NLX video connectors 6--80...................

Figure 6--41: Location of jumpers and reset button 6--81..............

Figure 9--1: Instrument block diagram 9--2........................

Figure 10--1: External parts 10--7.................................

Figure 10--2: Front panel and drives 10--10..........................

Figure 10--3: Power supply 10--13..................................

Figure 10--4: Acquisition assembly, CSA7000 Series 10--15.............

Figure 10--5: Acquisition assembly, TDS7000 Series 10--17.............

Figure 10--6: Accessories 10--18....................................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

vii

Table of Contents

List of Tables

Table 1--1: CSA7000 and TDS7000 models 1--1....................

Table 1--2: Channel input and vertical specifications 1-- 5............

T able 1--3: Horizontal and acquisition system specifications 1--9......

Table 1--4: Trigger specifications 1--12.............................

Table 1--5: Serial Trigger specifications (Optional on

TDS7000 Series) 1--16.......................................

Table 1--6: Display specifications 1--17.............................

Table 1--7: Input/output port specifications 1--18....................

Table 1--8: O/E converter (CSA7000 Series only) 1--21...............

Table 1--9: Data storage specifications 1--23........................

Table 1--10: Power source specifications 1--23.......................

T able 1--11: Mechanical specifications 1--24........................

Table 1--12: Environmental specifications 1--25.....................

Table 1--13: Certifications and compliances 1--26....................

Table 2--1: Additional accessory connection information 2--2.........

Table 2--2: Line fuses 2--4......................................

Table 4--1: Test equipment 4--18..................................

T able 4--2: DC V oltage measurement accuracy 4--37.................

T able 4--3: Gain accuracy 4--41...................................

T able 4--4: Offset accuracy 4--52..................................

Table 4--5: Maximum input voltage limit 4--56......................

Table 4--6: Analog bandwidth 4--60...............................

T able 4--7: Delay between channels worksheet 4--66.................

Table 4--8: Delta time measurement 4--79..........................

Table 4--9: Serial pattern data 4--97...............................

T able 4--10: Word recognizer data 4--99...........................

Table 4--11: Clock recovery input frequencies and baud rates 4--104....

Table 4--12: Dark level 4--108.....................................

Table 4--13: Optical noise limits 4--110.............................

Table 4--14: O/E gain 4--112......................................

Table 4--15: O/E system bandwidth 4--117..........................

viii

T able 6--1: External inspection check list 6--4......................

T able 6--2: Internal inspection check list 6--5......................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Table of Contents

Table 6--3: Tools required for module removal 6--10.................

Table 6--4: Failure symptoms and possible causes 6--61...............

Table 6--5: Power supply voltages 6-- 66............................

Table 6--6: Power-on diagnostic tests 6--69.........................

Table 6--7: Action required for module replaced 6-- 73................

Table 6--8: BIOS Error messages (Radisys) 6--73....................

Table 6--9: Beep codes (Radisys) 6 --76.............................

Table 6--10: DIP switch functions 6--77............................

Table 6--11: Diagnostic LED 6--78................................

Table 7--1: Options 7--1........................................

T able 7--2: Standard accessories 7--2.............................

Table 7--3: Optional accessories 7--3..............................

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

ix

Table of Contents

x

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.

Only qualified personnel should perform service procedures.

While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.

ToAvoidFireor

Personal Injury

Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.

Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.

Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.

Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.

Use Proper Fuse. Use only the fuse type and rating specified for this product.

Avoid Exposed Circuitry. Do not touch exposed connections and components

when power is present.

Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.

Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Provide Proper Ventilation. Refer to the manual’s installation instructions for

details on installing the product so it has proper ventilation.

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

xi

General Safety Summary

Symbols and Terms

Terms in this Manual. These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.

Terms on the Product. These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the
marking.

WARNING indicates an injury hazard not immediately accessible as you read the
marking.

CAUTION indicates a hazard to property including the product.

Symbols on the Product. The following symbols may appear on the product:

CAUTION

Refer to Manual

Mains Disconnected

OFF (Power)

WARNING

High Voltage

Mains Connected

ON (Power)

Protective Ground

(Earth) Terminal

Standby

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Service Safety Summary

Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service

procedures.

Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.

Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.

Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.

To avoid electric shock, do not touch exposed connections.

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

xiii

Service Safety Summary

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Preface

Manual Structure

Manual Conventions

This is the service manual for the CSA7000 Communications Signal Analyzer
products and the TDS7000 Digital Oscilloscope products. Read this preface to
learn how this manual is structured, what conventions it uses, and where you can
find other information related to servicing this product. Read the Introduction
following this preface for safety and other important background information
needed before using this manual for servicing this product.

This manual is divided into chapters, which are made up of related subordinate
topics. These topics can be cross referenced as sections.

Be sure to read the introductions to all procedures. These introductions provide
important information needed to do the service correctly, safely, and efficiently.

This manual uses certain conventions that you should become familiar with
before attempting service.

Modules

Replaceable Parts

Safety

Throughout this manual, any replaceable component, assembly, or part is
referred to by the term module. A module is composed of electrical and
mechanical assemblies, circuit cards, interconnecting cables, and user-accessible
controls.

This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replaceable part is any circuit board or assembly, such as the hard disk drive, or a
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list of Chapter 10.

Symbols and terms related to safety appear in the General Safety Summary found
at the beginning of this manual.

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

xv

Preface

Related Documentation

The following related manuals are available for this instrument:

H CSA7000 & TDS7000 User manual. Tektronix part number 071-0879-XX.

H CSA7000 & TDS7000 Reference manual. Tektronix part number

071-0880-XX.

H CSA7000, TDS7000, TLA 600 & OTS9000 Series Rackmount Kit

(Option 1R) Instructions. Tektronix part number 071-0716-XX.

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Contacting Tektronix

Preface

Phone [phone]*

Address Tektronix, Inc.

Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA

Web site www.tektronix.com

Sales support 1-800-833-9200, select option 1*

Service support 1-800-833-9200, select option 2*

Technical support Email: [e-mail]

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific time

* This phone number is toll free in North America. After office hours, please leave a

voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

xvii

Preface

xviii

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Specifications

This chapter contains the specifications for the CSA7000 Series Communica­tions Signal Analyzers and the TDS7000 series Digital Phosphor Oscilloscopes.
All specifications are guaranteed unless labeled “typical.” Typical specifications
are provided for your convenience but are not guaranteed. Specifications that are
marked with the n symbol are checked in chapter four, Performance Verifica-
tion of the service manual.

All specifications apply to all models unless noted otherwise. To meet specifica­tions, the following conditions must be met:

H The instrument must have been calibrated in an ambient temperature

between 20 °C and 30 °C(68°F and 86 °F).

H The instrument must be operating within the environmental limits listed in

Table 1--12 on page 1--25.

H The instrument must be powered from a source that meets the specifications

listedinTable1--10onpage1--23.

H The instrument must have been operating continuously for at least 20 min-

utes within the specified operating temperature range.

H You must perform the Signal Path Compensation procedure after the

20-minute warm-up period, and if the ambient temperature changes more
than 5 °C(41°F), repeat the procedure. See Run the signal path compensa-
tion routine on page 4--6 for instructions to perform this procedure.

Product and Feature Description

Your instrument is shown in Table 1--1.

Table 1- 1: CSA7000 and TDS7000 models

Model

CSA7404 4 4GHz 20 GS/s

CSA7154 4 1.5 GHz 20 GS/s

TDS7404 4 4GHz 20 GS/s

TDS7254 4 2.5 GHz 20 GS/s

TDS7154 4 1.5 GHz 20 GS/s

Number of
channels

Bandwidth

Maximum sample
rate (real time)

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

1- 1

Specifications

Acquisition Features

Separate Digitizers. Ensure accurate timing measurements with separate digitizers
for each channel. Acquisition on multiple channels is always concurrent. The
digitizers can also be combined to yield a higher sample rate on a single channel.

Fast Acquisition. Acquire up to 400,000 waveforms per second to see rapidly
changing signals or intermittent signal irregularities.

Long Record Lengths. Choose record lengths from 500 points up to
500,000 points per channel (up 2,000,000 points on a single channel). Extend the
maximum record length up to a maximum of 32,000,000 points with memory
options.

Peak Detect Acquisition Mode. See pulses as narrow as 400 ps even at the slower
time base settings. Peak detect helps you see noise and glitches in your signal.

Acquisition Control. Acquire continuously or set up to capture single shot
acquisitions. Enable or disable optional acquisition features such as equivalent
time or roll mode. Use Fast Frame acquisition to capture and time stamp many
events in a rapid sequence.

Signal Processing

Features

Horizontal Delay. Use delay when you want to acquire a signal at a significant
time interval after the trigger point. Toggle delay on and off to quickly compare
the signal at two different points in time.

Optical-to-Electrical Converter. Test optical signals (CSA7000 Series only) using
the integrated optical-to-electrical converter and a fully calibrated signal path.
Recovered clock and data signals are available. Optical reference receivers are
available for selected optical communications standards.

Average, Envelope, and Hi Res Acquisition. Use Average acquisition mode to
remove uncorrelated noise from your signal. Use Envelope to capture and
display the maximum variation of the signal. Use Hi Res to increase vertical
resolution for lower bandwidth signals.

Waveform Math. Set up simple math waveforms using the basic arithmetic
functions or create more advanced math waveforms using the math expression
editor. W aveform expressions can even contain measurement results and other
math waveforms.

Spectral Analysis. Display spectral magnitude and phase waveforms based on
your time-domain acquisitions. Control the instrument using the traditional
spectrum analyzer controls such as span and center frequency.

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Specifications

Display Features

Measurement Features

Color LCD Display. Identify and differentiate waveforms easily with color coding.
Waveforms, readouts, and inputs are color matched to increase productivity and
reduce operating errors. Enhance visualization of waveforms with color grading.

Digital Phosphor. The instrument can clearly display intensity modulation in your
signals. The instrument automatically overlays subsequent acquisitions and then
decays them to simulate the writing and decay of the phosphor in an analog
instrument CRT. The feature results in an intensity-graded or color-graded
waveform display that shows the information in the intensity modulation.

Fit to Screen. The Digital Phosphor technology performs the compression
required to represent all record points on the screen, even at the maximum record
length settings.

Zoom. To take advantage of the full resolution of the instrument you can zoom in
on a waveform to see the fine details. Both vertical and horizontal zoom
functions are available. Zoomed waveforms can be aligned, locked, and
automatically scrolled.

Cursors. Use cursors to take simple voltage, time, and frequency measurements.

Trigger Features

Automatic Measurements. Choose from a large palette of amplitude, time, and
histogram measurements. You can customize the measurements by changing
reference levels or by adding measurement gating.

Mask Testing. Optional on TDS7000 Series. Provides mask testing for verifying
compliance to optical (CSA7000 Series only) and electrical standards. Optical
mask testing uses integrated reference receivers.

Simple and Advanced Trigger Types. Choose simple edge trigger or choose from
eight advanced trigger types to help you capture a specific signal fault or event.

Dual Triggers. Use the A (main) trigger system alone or add the B trigger to
capture more complex events. You can use the A and B triggers together to set
up a delay-by-time or delay-by-events trigger condition.

Comm Triggers. Optional on TDS7000 Series. Use comm triggers to trigger on
communication signals.

Serial Triggers. Option ST only. Use serial triggers to trigger on serial pattern
data.

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Specifications

Recovered Clock and Data Triggers. Use recovered clock and data internally to
trigger your waveforms. They are also available externally on the
CSA7000 Series.

Convenience Features

Autoset. Use Autoset to quickly set up the vertical, horizontal, and trigger
controls for a usable display. If a standard mask is active (optional on TDS7000
Series), Autoset adjusts the selected waveform to match the mask, if possible.

Touch Screen Interface. You can operate all instrument functions (except the
power switch and the touch screen enable/disable switch) from the touch screen
interface. If convenient, you can also install a mouse and keyboard to use the
interface.

Toolbar or Menu Bar. You can choose a toolbar operating mode that is optimized
for use with the touch screen, or a PC-style menu-bar operating mode that is
optimized for use with a mouse.

Open Desktop. The instrument is built on a Microsoft Windows software
platform; the instrument application program starts automatically when you
apply power to the instrument. You can minimize the instrument application and
take full advantage of the built-in PC to run other applications. Moving
waveform images and data into other applications is as simple as a copy/paste
operation.

Dedicated Front Panel Controls. The front panel contains knobs and buttons to
provide immediate access to the most common instrument controls. Separate
vertical controls are provided for each channel. The same functions are also
available through the screen interface.

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Data Storage and I/O. The instrument has a removeable hard disk drive, a CD-RW

drive, and a floppy disk drive that can be used for storage and retrieval of data.
The instrument has GPIB, USB, Centronics, and Ethernet ports for input and
output to other devices.

Online Help. The instrument has a complete online help system that covers all its
features. The help system is context sensitive; help for the displayed control
window is automatically shown if you touch the help button. Graphical aids in
the help windows assist you in getting to the information you need. You can also
access the help topics through a table of contents or index.

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Specification Tables

Specifications

Table 1- 2: Channel input and vertical specifications

Characteristic Description

Input channels Four

Input coupling DC 50 Ω and GND

Channel input is disconnected from input termination
when using GND coupling.

nInput impedance, DC coupled 50 Ω ±2.5% at 25 _C(77_F), ±0.2% over 0 to 50 _C

(122 _F)

VSWR, typical 1.5 for fin<1 GHz

1.7 for f

2.0 for f

nMaximum input voltage <1 V

<5 V

Number of digitized bits 8bits

<2.5 GHz

in

<4 GHz

in

for <100 mV/division settings and

RMS

for ≥100 mV settings

RMS

Sensitivity range 2 mV/div to 1 V/division, in a 1-2-5 sequence

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

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Specifications

Table 1- 2: Channel input and vertical specifications (Cont.)

Characteristic Description

nDC gain accuracy 2mV/divto3.9mV/div (2.5% +(6% ×|net

offset/1V | ))

4 mV/div to 99.5 mV/div (2% +(2% × | net off-

set/1V | ))

≥100 mV/div (2% +(2% × | net

offset/10V | ))

where, net offset = offset -- ( position × volts/division)
and is expressed in volts, not millivolts

n DC voltage measurement
accuracy

Average acquisition mode
(≥16 averages)

Delta voltage measurement
between any two averages
of ≥16 waveforms
acquired under the same
setupandambientcondi­tions

Measurement type DC accuracy (in volts)

2mV/divto3.98mV/div ±[(2.5% +(6% × | net

offset/1V | )) × | reading

-- net offset | + offset accu­racy + 0.08 division ×
V/division]

4 mV/div to 99.5 mV/div ±[(2% +(2% × | net

offset/1V | )) × | reading

-- net offset | + offset accu­racy + 0.08 division ×
V/division]

≥100 mV/div ±[(2% +(2% × | net

offset/10V | )) × | reading

-- net offset | + offset accu­racy + 0.08 division ×
V/division]

2mV/divto3.9mV/div ±((2.5% +(6% × | net

offset)/1V | )) × | reading |
+ 0.16 division × V/divi­sion setting

4 mV/div to 99.5 mV/div

±((2% +(2% × | net off-
set/1V | )) × | reading | ) +

0.16 division × V/division
setting

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≥100 mV/div ±((2% +(2% × | net off-

set/10V)) × | reading | ) +

0.16 division × V/division
setting

Net offset is the nominal voltage that must be applied to
the channel to bring the trace to center screen. Net offset
= offset -- ( position × volts/division) and is expressed in
volts

Nonlinearity, typical < 1 digitization level (DL), differential; ≤ 2 DL integral,

independently based

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

Specifications

adapter,operatingambient15C(0CforCSA7154,

Table 1- 2: Channel input and vertical specifications (Cont.)

Characteristic Description

n Analog bandwidth DC 50 Ω coupling, Full bandwidth, TCA-SMA or TCA-N

adapter, operating ambient 15 °C(0°C for CSA7154,
TDS7154, & TDS7254) to 50 °C(59°F to 122 °F),
derated by 30 MHz/°C below 15 °C(59°F)

SCALE range Bandwidth

2mV/divto3.9mV/div DC to ≥1GHz

4mV/divto9.9mV/div DC to ≥1.25 GHz

≥10 mV/div CSA7404 & TDS7404:

DC to 4 GHz

TDS7254:
DC to ≥ 2.5 GHz

CSA7154 & TDS7154:
DC to 1.5 GHz

Analog bandwidth with P7240
active probe or TCA-BNC adapter,
typical

Analog bandwidth with P7330
active probe, typical

Calculated rise time, typical

1

DC 50 Ω coupling, Full bandwidth, operating ambient
15 °Cto30°C(59°Fto86°F), derated by 20 MHz/°C
above 30 °C(86°F)

SCALE range Bandwidth

2mV/divto3.9mV/div CSA7404 & TDS7404:

DC to 1 GHz

4mV/divto9.9mV/div CSA7404 & TDS7404:

DC to 1.25 GHz

≥10 mV/div CSA7404 & TDS7404:

DC to 4 GHz

DC 50 Ω coupling, Full bandwidth, operating ambient
15 °Cto30°C, derated by 20 MHz/°C above 30 °C

SCALE range Bandwidth

2mV/divto3.9mV/div CSA7404 & TDS7404:

DC to 1 GHz

4mV/divto9.9mV/div CSA7404 & TDS7404:

DC to 1.25 GHz

≥10 mV/div CSA7404 & TDS7404:

DC to 3.5 GHz

CSA7404: 100 ps

CSA7154: 240 ps

TDS7404: 100 ps

TDS7254: 160 ps

TDS7154: 240 ps

CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual

1- 7

Specifications

c

a

Table 1- 2: Channel input and vertical specifications (Cont.)

Characteristic Description

Step response settling errors,
typi

l

Full bandwidth

SCALE range and step
amplitude

Settling error at time after
step

2 mV/div to 99.5 mV/div,
with ≤ 1.5 V step

100 mV/div to 1 V/div,
with ≤ 3Vstep

Pulse response, peak detect or
envelope mode

Position range ± 5 divisions

Offset range SCALE range Offset range

Offset accuracy SCALE range Offset range

Sample rate setting Minimum pulse width

2.5 GS/s or less

2mV/divto50mV/div ±0.50 V

50.5 mV/div to 99.5 mV/div ±0.25 V

100 mV/div to 500 mV/div ±5V

505 mV/div to 1 V/div ±2.5 V

2mV/divto9.95mV/div ±(0.2% ×| net offset | +

10 mV/div to 99.5 mV/div ±(0.35% ×| net offset | +

20 ns: ≤ 2%
1ms:≤ 0.1%

20 ns: ≤ 2%
1ms:≤ 0.2%

400 ps

1.5 mV + 0.1 div ×V/div
setting)

1.5 mV + 0.1 div ×V/div
setting)

100 mV/div to 1 V/div ±(0.35% ×| net offset | +

15 mV + 0.1 div ×V/div
setting)

where, net offset = offset -- ( position × volts/division)
and is expressed in volts, not millivolts

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CSA7404, CSA7154, TDS7404, TDS7254 & TDS7154 Service Manual