Tektronix TDS7154B, TDS7254B, TDS7404B, CSA7000B, CSA7404B Service Manual
...
Service Manual
CSA7000B Series
Communication Signal Analyzers &
TDS7000B Series
Digital Phosphor Oscilloscopes
(CSA7404B, TDS7704B, TDS7404B,
TDS7254B, & TDS7154B)
071-1227-04
Revision A
This document applies to firmware version 3.0.0
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. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and int ernational treaty provisions.
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 and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
H In North America, call 1-800-833-9200.
H Worldwide, visit www.tektronix.com to find contacts in your area.
Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its
option, either will repair the defective product without charge for parts and labor, or will provide a replacement in
exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work
may be new or reconditioned to like new performance. All replaced parts, modules and products become the
property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Custom er shall be
responsible for packaging and shipping the defective product to the service center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
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 incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service 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.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS W ARRANTY.
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....................................
Environmental Considerations xv...............................
Preface xvii...................................................
Manual Structure xvii................................................
Manual Conventions xvii..............................................
Related Documentation xviii...........................................
Product and Feature Description 1--2....................................
Acquisition Features 1--2..........................................
Signal Processing Features 1--3.....................................
Display Features 1--3.............................................
Measurement Features 1--3.........................................
Trigger Features 1--4..............................................
Convenience Features 1--4.........................................
Specification Tables 1--5..............................................
Certifications and Compliances 1--28.....................................
Operating Information 2--1.....................................
Installation 2--1.....................................................
Before You Start 2--1.............................................
Environmental Considerations 2--1..................................
Connect the Peripherals 2--1........................................
Power On the Instrument 2--4.......................................
Powering Off the Instrument 2--5....................................
Software Installation 2--5..........................................
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.........................................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
i
Table of Contents
Theory of Operation
Theory of Operation 3--1.......................................
Logic Conventions 3--1...............................................
Module Overviews 3--1...............................................
Performance Verification
Performance Verification 4--1...................................
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..............................................
CSA7000B & TDS7000B Test Record 4--21...............................
Signal Acquisition System Checks 4--45...................................
Time Base System Checks 4--92.........................................
Trigger System Checks 4--98............................................
Output Signal Checks 4--106.............................................
Serial Trigger Checks (TDS7000B Series Option ST and CSA7000B Series
Optical-to-Electrical Converter Checks (CSA7000B Series Only) 4--125..........
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--14.........................................
Check DC Voltage Measurement Accuracy 4--45........................
Check DC Gain Accuracy 4--49......................................
Check Offset Accuracy 4--68........................................
Check Maximum Input Voltage 4--73.................................
Check Analog Bandwidth 4--77......................................
Check Delay Between Channels 4--82.................................
Check Channel Isolation (Crosstalk) 4--86.............................
Check Input Impedance 4--90.......................................
Check Long-Term Sample Rate and Delay Time Accuracy and Reference 4--92
Check Delta Time Measurement Accuracy 4--95........................
Check Time Accuracy for Pulse, Glitch, Timeout, and Width Triggering 4--99.
Check Sensitivity, Edge Trigger, DC Coupled 4--101......................
Check Outputs — CH 3 Signal Out and Aux Trigger Out 4--107.............
Check Probe Compensation Output 4--110..............................
Only) 4--114......................................................
Check Serial Trigger Baud Rate Limits and Word Recognizer Position
Accuracy 4--114............................................
Check Serial Trigger Clock Recovery Range 4--121.......................
ii
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Adjustment Procedure
Maintenance
Table of Contents
Check Dark Level Calibration 4--125..................................
Check Maximum Optical-to-Electrical Noise 4--127......................
Check Optical-to-Electrical Gain 4--129................................
Check Optical-to-Electrical System Bandwidth 4--131.....................
Sine Wave Generator Leveling Procedure 4--137.............................
Adjustment Procedures 5--1.....................................
Adjustment Interval 5--1..............................................
Adjustment After Repair 5--1..........................................
Adjustment 5--1.....................................................
Maintenance 6-- 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............................................
Flat Panel Display 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--65...........................................
Service Level 6--65...................................................
Check for Common Problems 6--65......................................
Equipment Required 6--67..............................................
Fault Isolation Procedure 6--67..........................................
PPC and MicroATX PC Diagnostics 6--72.................................
Software Updates 6--75................................................
After Repair 6--75....................................................
BIOS Error Messages 6--76.............................................
BIOS Beep Codes 6--81................................................
Dip Switch Controls 6--82..............................................
Diagnostic LED 6--83.................................................
Troubleshooting Using Reset Circuits 6--84................................
Update/Restore the MicroATX Board CMOS 6--86..........................
Installing an Authorization Key 6--87.....................................
Hard Disk Drive Maintenance 6--87......................................
Repackaging Instructions 6--89...................................
Packaging 6--89......................................................
Shipping to the Service Center 6--89......................................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
iii
Table of Contents
Options
Electrical Parts List
Diagrams
Mechanical Parts List
Options 7--1........................................................
Accessories 7--3.....................................................
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...........................
iv
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B 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 4-- 3...........................
Figure 4--2: Universal test hookup for functional
tests -- CH 1 shown 4--8.....................................
Figure 4 --3: Channel button location 4-- 9..........................
Figure 4--4: Setup for time base test 4--11...........................
Figure 4--5: Setup for trigger test 4--13.............................
Figure 4--6: Setup for the file system test 4--14.......................
Figure 4--7: Initial test hookup 4--46...............................
Figure 4--8: Measurement of DC accuracy at maximum
offset and position 4--48......................................
Figure 4--9: Initial test hookup 4--50...............................
Figure 4--10: Measurement of DC gain accuracy 4--67................
Figure 4--11: Initial test hookup 4--69..............................
Figure 4--12: Measurement of offset accuracy 4--72...................
Figure 4--13: Initial test hookup 4--74..............................
Figure 4 --14: Check of maximum input voltage 4-- 76.................
Figure 4--15: Initial test hookup 4--78..............................
Figure 4--16: Measurement of analog bandwidth 4--80................
Figure 4--17: Initial test hookup 4--83..............................
Figure 4--18: Measurement of channel delay 4--84...................
Figure 4--19: Initial test hookup 4--86..............................
Figure 4--20: Initial test hookup 4--91..............................
Figure 4--21: Initial test hookup 4--92..............................
Figure 4--22: Initial test hookup 4--93..............................
Figure 4--23: Final test hookup 4--94...............................
Figure 4--24: Delta time accuracy test hookup 4--96..................
Figure 4--25: Initial test hookup 4--99..............................
Figure 4--26: Measurement of time accuracy for pulse
and glitch triggering 4--100....................................
Figure 4--27: Initial test hookup 4--102..............................
Figure 4--28: Measurement of trigger sensitivity -- 50 MHz
results shown 4--103..........................................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
v
Table of Contents
Figure 4--29: Initial test hookup 4--107..............................
Figure 4--30: Measurement of trigger ou t limits 4--109.................
Figure 4--31: Initial test hookup 4--110..............................
Figure 4--32: Measurement of probe compensator frequency 4--111......
Figure 4 --33: Subsequent test hookup 4-- 112.........................
Figure 4--34: Measurement of probe compensator amplitude 4--113......
Figure 4--35: Initial test hookup 4--114..............................
Figure 4--36: Isolated 0 triggering 4--116............................
Figure 4--37: Isolated 1 triggering 4--118............................
Figure 4--38: N modulo 3 triggering 4--120...........................
Figure 4--39: Initial test hookup 4--121..............................
Figure 4--40: Clock recovery 4--124.................................
Figure 4--41: Initial test hookup 4--125..............................
Figure 4--42: Initial test hookup 4--127..............................
Figure 4--43: Initial test hookup 4--129..............................
Figure 4--44: Optical bandwidth hookup 4--134......................
Figure 4--45: Proper positioning of the impulse 4--135.................
Figure 4--46: Optical impulse response 4--136........................
Figure 4--47: Equipment setup for maximum amplitude 4--138.........
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 L CD assembly removal 6--29...........
Figure 6--14: Display adaptor board removal 6--30...................
Figure 6--15: Power flex circuit removal 6--31.......................
Figure 6--16: Floppy disk drive assembly removal 6--32...............
Figure 6--17: Floppy disk drive removal 6--33.......................
Figure 6--18: Hard disk drive removal 6--34.........................
Figure 6--19: Separating the halves of the drive cartridge 6--34.........
Figure 6--20: Hard disk drive removal from cartridge 6--35............
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CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Table of Contents
Figure 6--21: CD drive assembly removal 6--36......................
Figure 6--22: CD drive and bracket removal 6--37....................
Figure 6--23: Front and rear power distribution and
PA bus boards removal 6--39..................................
Figure 6 --24: Low-voltage power supply removal 6--40................
Figure 6--25: Micro ATX battery removal 6--41......................
Figure 6--26: Drive frame and ATX assembly removal 6--43...........
Figure 6--27: ATX assembly troubleshooting position 6--44............
Figure 6--28: Cables 6--45........................................
Figure 6--29: Micro ATX assembly removal 6--45....................
Figure 6--30: Cables 6--46........................................
Figure 6--31: Micro ATX board removal 6--47.......................
Figure 6--32: Microprocessor removal 6--49.........................
Figure 6--33: Fan assembly removal 6--51...........................
Figure 6--34: Processor board cables 6--53..........................
Figure 6--35: PPC Processor board removal 6--54....................
Figure 6--36: Bridge board removal 6--55...........................
Figure 6--37: Acquisition circuit board removal 6--57.................
Figure 6--38: Front panel combination assembly removal 6--58.........
Figure 6 --39: TekConnect board and TekConnect
bucket removal 6--59........................................
Figure 6--40: Acquisition circuit board removal 6--62.................
Figure 6--41: Front panel combination assembly removal 6--63.........
Figure 6 --42: TekConnect board and TekConnect
bucket removal 6--64........................................
Figure 6--43: Primary troubleshooting tree 6--68.....................
Figure 6--44: Location of power-on and over current LEDs 6--69.......
Figure 6--45: Connectors J1 and J2 6--70...........................
Figure 6--46: The three PCI busses 6--84...........................
Figure 6--47: PCI and MicroATX video connectors 6--85..............
Figure 6--48: Location of jumpers and reset button 6--86..............
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, CSA7000B Series 10--15............
Figure 10--5: Acquisition assembly, TDS7000B Series 10--17............
Figure 10--6: Accessories 10--18....................................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
vii
Table of Contents
List of Tables
Table 1--1: Instrument models 1-- 2...............................
Table 1--2: Channel input and vertical specifications 1-- 5............
T able 1--3: Horizontal and acquisition system specifications 1--11......
Table 1--4: Trigger specifications 1--15.............................
Table 1--5: Serial Trigger specifications (optional on
TDS7000B Series) 1--19......................................
Table 1--6: Display specifications 1--19.............................
Table 1--7: Input/output port specifications 1--20....................
Table 1--8: O/E converter (CSA7000B Series only) 1--23..............
Table 1--9: Data storage specifications 1--25........................
Table 1--10: Power source specifications 1--25.......................
T able 1--11: Mechanical specifications 1--26........................
Table 1--12: Environmental specifications 1--27.....................
Table 2--1: Additional accessory connection information 2--2.........
Table 2--2: Line fuses 2 --4......................................
Table 4--1: Vertical settings 4--9.................................
Table 4--2: Test equipment 4--18..................................
T able 4--3: DC Voltage measurement accuracy 4--47.................
T able 4--4: Gain accuracy 4--51...................................
T able 4--5: Offset accuracy 4--70..................................
Table 4--6: Maximum input voltage limit 4-- 75......................
Table 4--7: Analog bandwidth 4--79...............................
T able 4--8: Delay between channels worksheet 4--85.................
Table 4--9: Delta time measurement 4--98..........................
Table 4--10: Serial pattern data 4--115..............................
Table 4--11: Word recognizer data 4--117............................
Table 4--12: Clock recovery input frequencies and baud rates 4-- 123....
Table 4--13: Dark level 4--126.....................................
Table 4--14: Optical noise limits 4--128.............................
Table 4--15: O/E gain 4--130......................................
Table 4--16: O/E system bandwidth 4-- 135..........................
viii
T able 6--1: External inspection check list 6--4......................
T able 6--2: Internal inspection check list 6--5......................
Table 6--3: Tools required for module removal 6--10.................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Table of Contents
Table 6--4: Failure symptoms and possible causes 6--65...............
Table 6--5: Power supply voltages 6--70............................
Table 6--6: Power-on diagnostic tests 6--72.........................
Table 6--7: Action required for module replaced 6-- 76................
Table 6--8: BIOS Error messages 6--76............................
Table 6--9: POST codes 6--77.....................................
Table 6--10: Different bus routines upper-nibble
high-byte functions 6--81.....................................
T able 6--11: Beep codes 6--81.....................................
Table 6--12: DIP switch functions 6--82............................
Table 6--13: Diagnostic LED 6--83................................
Table 7--1: Options 7--1........................................
T able 7--2: Standard accessories 7--3.............................
Table 7--3: Optional accessories 7--4..............................
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
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Table of Contents
x
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B 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 a larger system.
Read the safety sections of the other component 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.
The inputs are not rated for connection to mains or Category II, III, or IV
circuits.
Connect the probe reference lead to earth ground only.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power Disconnect. The power switch disconnects the product from the power
source. See instructions for the location. Do not block the power switch; it must
remain accessible to the user at all times.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
xi
General Safety Summary
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
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.
Terms in this Manual
Symbols and Terms
on the Product
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.
These terms may appear on the product:
H DANGER indicates an injury hazard immediately accessible as you read the
marking.
H WARNING indicates an injury hazard not immediately accessible as you
read the marking.
H CAUTION indicates a hazard to property including the product.
The following symbols may appear on the product:
xii
CAUTION
Refer to Manual
Mains Disconnected
OFF (Power)
WARNING
High Voltage
Mains Connected
ON (Power)
Protective Ground
(Earth) Terminal
Standby
Earth Terminal
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B 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.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
xiii
Service Safety Summary
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CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Environmental Considerations
This section provides information about the environmental impact of the
product.
Product End-of-Life
Handling
Observe the following guidelines when recycling an instrument or component:
Equipment Recycling. Production of this equipment required the extraction and
use of natural resources. The equipment may contain substances that could be
harmful to the environment or human health if improperly handled at the
product’s end of life. In order to avoid release of such substances into the
environment and to reduce the use of natural resources, we encourage you to
recycle this product in an appropriate system that will ensure that most of the
materials are reused or recycled appropriately.
The symbol shown to the left indicates that this product
complies with the European Union’s requirements
according to Directive 2002/96/EC on waste electrical and
electronic equipment (WEEE). For information about
recycling options, check the Support/Service section of the
Tektronix Web site (www.tektronix.com).
Mercury Notification. This product uses an LCD backlight lamp that contains
mercury. Disposal may be regulated due to environmental considerations. Please
contact your local authorities or, within the United States, the Electronics
Industries Alliance (www.eiae.org) for disposal or recycling information.
Restriction of Hazardous
Substances
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
This product has been classified as Monitoring and Control equipment, and is
outside the scope of the 2002/95/EC RoHS Directive. This product is known to
contain lead, cadmium, mercury, and hexavalent chromium.
xv
Environmental Considerations
xvi
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Preface
Manual Structure
Manual Conventions
This is the service manual for the CSA7000B Communications Signal Analyzer
products and the TDS7000B 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.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
xvii
Preface
Related Documentation
The following related manuals are available for this instrument:
H CSA7000B & TDS7000B User manual. Tektronix part number
071-1227-XX.
H CSA7000B & TDS7000B Reference manual. Tektronix part number
071-0880-XX.
H CSA7000, TDS7000, TLA600 & OTS9000 Series Rackmount Kit
(Option 1R) Instructions. Tektronix part number 071-0716-XX.
xviii
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Specifications
Specifications
This chapter contains the specifications for the CSA7000B Series Communications Signal Analyzers and the TDS7000B 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 Verification, 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--27.
H The instrument must be powered from a source that meets the specifications
listedinTable1--10onpage1--25.
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 S ignal Path Compensation procedure after the
20-minute warm-up period, and the ambient temperature must not change
more than 5 °C without first repeating the procedure. See Run the signal
path compensation routine on page 4--6 for instructions to perform this
procedure.
H You must perform the S ignal 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.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
1- 1
Specifications
Product and Feature Description
Your instrument is shown in Table 1--1.
Table 1- 1: Instrument models
Acquisition Features
Number of
Model
TDS7704B 4 7GHz 20 GS/s
CSA7404B 4 4GHz 20 GS/s
TDS7404B 4 4GHz 20 GS/s
TDS7254B 4 2.5 GHz 20 GS/s
TDS7154B 4 1.5 GHz 20 GS/s
channels
Bandwidth
Maximum sample
rate (real time)
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 64,000,000 points with memory
options.
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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.
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.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Specifications
Optical-to-Electrical Converter. CSA7000B Series only. Test optical signals 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.
Signal Processing
Features
Display Features
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. Waveform 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.
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.
MultiView 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.
Measurement Features
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Cursors. Use cursors to take simple voltage, time, and frequency measurements.
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Specifications
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 TDS7000B Series. Provides mask testing for verifying
compliance to optical (CSA7000B Series only) and electrical standards. Optical
mask testing uses integrated reference receivers.
Trigger Features
Convenience Features
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 TDS7000B Series. Use comm triggers to trigger on
communication signals.
Serial Triggers. Optional on TDS7000B Series. Use serial triggers to trigger on
serial pattern data.
Recovered Clock and Data Triggers. Use recovered clock and data internally to
trigger your waveforms. They are also available externally (CSA7000B Series
only).
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 TDS7000B
Series), Autoset adjusts the selected waveform to match the mask, if possible.
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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.
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
Specifications
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.
Data Storage and I/O. The instrument has a removeable hard disk drive, a
CD-RW, 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
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.
Specification Tables
Table 1- 2: Channel input and vertical specifications
Characteristic Description
Input channels Four
Input coupling Channel input is disconnected from input termination when using GND coupling.
DC 50 Ω and GND
nInput impedance, DC coupled
50 Ω ±2.5% at 25 _C(77_F), ±0.2% over 0 to 50 _C (122 _F)
VSWR, typical
CSA7404B, TDS7404B, CSA7154, &
TDS7154B
TDS7704B
1.5 for fin<1 GHz
1.7 for f
2.0 for f
<100 mV/div ≥100 mV/div
1.5 for f
2forf
2.5 for f
<2.5 GHz
in
<4 GHz
in
<2 GHz 1.1 for fin<2 GHz
in
<3 GHz 1.2 for fin<3 GHz
in
<6 GHz 1.3 for fin<6 GHz
in
CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
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Specifications
Table 1- 2: Channel input and vertical specifications (Cont.)
Characteristic Description
nMaximum input voltage, <1 V
CSA7404B, TDS7404B, CSA7154, &
<5 V
TDS7154B
for <100 mV/division settings and
RMS
for ≥100 mV settings
RMS
TDS7704B
<6.5 V
<6.0 V
for ≥100 mV settings for temperatrues ≤45 °C
RMS
for ≥100 mV settings for temperatrues >45 °C
RMS
Number of digitized bits 8bits
Sensitivity range Fine adjustment available with ≥1% resolution
2 mV/div to 1 V/division, in a 1-2-5 sequence
nDC gain accuracy 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
TDS7704B 2mV/divto3.98mV/div (3% +(6% × | net offset/1V | ))
4 mV/div to 99.5 mV/div (2.5% +(2% × | net offset/1V | ))
100 mV/div to 1 V/div (2.5% +(2% × | net offset/10V | ))
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CSA7404B, TDS7704B , TDS7404B, TDS7254B & TDS7154B Service Manual
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