Tektronix CSA8000 Series User manual

Service Manual
CSA8000
Communications Signal Analyzer
TDS8000
Digital Sampling Oscilloscope
071-0438-01
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 incompatible 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.

CSA8000 & TDS8000 Instruments and Sampling Modules i
Table of Contents
General Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Structure xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Conventions xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documentation xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
System Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certifications 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80E00 Electrical Sampling Modules 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . .
80C00 Optical Modules 1–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80A01 Trigger Prescale Preamplifier Module 1–37. . . . . . . . . . . . . . . . . . .
Operating Information
Installation
Check the Environmental Requirements 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install the Sampling Modules 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect the Peripherals 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power On the Instrument 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powering Off the Instrument 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Installation 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Release Notes 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating System Reinstallation 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 98 Reinstall Only. 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Diagnostics 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Instructions 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Documentation Map 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface Map – Complete Control and Display 2–13. . . . . . . . . . . . . . . . . . . . .
Front Panel Map – Quick Access to Most Often Used Features 2–14. . . . . . . . . . . . .
Display Map – Single Graticule View 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel I/O Map 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel I/O Map 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use Online Help 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80E00 Electrical Sampling Module Operation 2–23. . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Connector 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Channel Selection 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEKPROBE Connector 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDR On Indicator 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii CSA8000 & TDS8000 Instruments and Sampling Modules
80C00 Optical Sampling Module Operation 2–25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuating Optical Signals 2–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Channel Selection 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Input Connector 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Recovery Outputs 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hold-Down Screws 2–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80A01 Trigger Prescale Preamplifier Module Operation 2–27. . . . . . . . . . . . . . . . . .
Signal Connector 2–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation
Logic Conventions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mainframe Overview 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedures
Brief Procedures 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform the Diagnostics 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform the Compensation 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform the Functional Tests 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform the Hardware and Operating System Tests 4–15. . . . . . . . . . . . . . . . . . . . . .
Performance Tests 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CSA8000/TDS8000 Test Records 4–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CSA8000/TDS8000 Main-Instrument Test Record 4–24. . . . . . . . . . . . . . . . . . . . . . .
80E00 Electrical Modules Test Record 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80C00 Optical Modules Test Record 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Instrument 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time interval accuracy, short-term optimized and locked-to-internal
10-MHz reference modes 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External direct trigger level accuracy 4–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External direct trigger sensitivity 4–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External direct trigger delay jitter, short term optimized and locked to internal 10 MHz
reference modes 4–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External prescaled trigger delay jitter, short term optimized mode and locked to internal
10 MHz reference mode 4–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External prescaled trigger sensitivity 4–50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Sampling Modules 4–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input impedance 4–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC voltage measurement accuracy 4–56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Random noise, displayed 4–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise time (80E02, 80E03, & 80E04) 4–64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog bandwidth (80E01) 4–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDR system reflected rise time (80E04) 4–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDR system step response aberrations (80E04) 4–78. . . . . . . . . . . . . . . . . . . . . . . . .
Optical Sampling Modules 4–83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dark Level & Vertical Equivalent Optical Noise 4–83. . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Optical Bandwidth & Reference Receiver Frequency Response 4–88. . . .
Integrated Rise Time 80C06 4–99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
CSA8000 & TDS8000 Instruments and Sampling Modules iii
Clock Recovery Optical Sensitivity Range and Recovered Clock Timing Jitter 4–103.
80A01 Trigger Prescale Limiting Preamplifier Module 4–111. . . . . . . . . . .
Prerequisites 4–111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Trigger Sensitivity 4–111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures
Adjustment Interval 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Environment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment After Repair 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrumentation Setup 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Instrument Adjustments 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Calibrator Adjust 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Calibrator Adjust Verification 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal 10 MHz Adjust 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
Preventing ESD 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Cleaning 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Cleaning 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation Procedures 6–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for External Modules 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for Modules 6–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exchanging electrical sampling module 6–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Level 6–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Common Problems 6–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 6–70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Isolating Failures between the 80E0X/80C0X Modules or the Mainframe 6–70. . . . .
Checking the Power Supply Voltages 6–72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PPC and NLX PC Diagnostics 6–74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firmware Updates 6–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
After Repair 6–76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BIOS Error Messages 6–77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BIOS Beep Codes 6–78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Instrument Model and Serial Number 6–79. . . . . . . . . . . . . . . . . . . . . .
Update/Restore the NLX Board CMOS 6–80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 6–81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packaging 6–81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping to the Service Center 6–81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
iv CSA8000 & TDS8000 Instruments and Sampling Modules
Options and Accessories
Standard Accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Parts List
Diagrams
Symbols 9–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Parts List
Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
CSA8000 & TDS8000 Instruments and Sampling Modules v
List of Figures
Figure 2–1: Compartments for sampling modules 2–3. . . . . . . . . . . . . . . .
Figure 2–2: Maximum inputs in three configurations 2–3. . . . . . . . . . . . .
Figure 2–3: Locations of peripheral connectors on rear panel 2–5. . . . . .
Figure 2–4: Line fuse and power cord connector locations,
rear panel 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: On/Standby switch location 2–7. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–6: Sampling module, 80E04 shown 2–23. . . . . . . . . . . . . . . . . . . .
Figure 2–7: Sampling module, 80C01-CR shown 2–26. . . . . . . . . . . . . . . . .
Figure 2–8: 80A01 module front panel 2–27. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–1: Compensation dialog box 4–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2: Hookup for electrical functional tests 4–8. . . . . . . . . . . . . . . .
Figure 4–3: Channel button location 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–4: Channel button location 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–5: Optical channel verification 4–11. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–6: Hookup for the time base tests 4–12. . . . . . . . . . . . . . . . . . . . .
Figure 4–7: Channel button location 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–8: Main time base verification 4–14. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–9: Mag time base verification 4–15. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–10: Time interval accuracy test hookup 4–34. . . . . . . . . . . . . . . .
Figure 4–11: External direct trigger test hookup 4–37. . . . . . . . . . . . . . . . .
Figure 4–12: External direct trigger sensitivity test hookup 4–40. . . . . . . .
Figure 4–13: External direct trigger jitter test hookup 4–43. . . . . . . . . . . .
Figure 4–14: External prescaled test hookup 4–47. . . . . . . . . . . . . . . . . . . .
Figure 4–15: External prescaled trigger sensitivity test hookup 4–50. . . . .
Figure 4–16: Input impedance test hookup 4–54. . . . . . . . . . . . . . . . . . . . .
Figure 4–17: Vertical DC accuracy test hookup 4–57. . . . . . . . . . . . . . . . . .
Figure 4–18: Rise Time hookup 4–64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–19: Power-reference hookup 4–67. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–20:Adapter characterization hookup 4–69. . . . . . . . . . . . . . . . . .
Figure 4–21: Measure reference signals 4–70. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–22: 80E01 reference signals hookup 4–72. . . . . . . . . . . . . . . . . . .
Figure 4–23: TDR reflected rise time hookup 4–75. . . . . . . . . . . . . . . . . . .
Figure 4–24: TDR system step response aberrations hookup 4–78. . . . . . .
Figure 4–25: Dark Level and Vertical Equivalent Optical
Noise test hookup 4–83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
vi CSA8000 & TDS8000 Instruments and Sampling Modules
Figure 4–26: Minimum optical bandwidth and reference
receiver frequency response hookup 4–90. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–27: Proper positioning of the impulse for optimum
curve download 4–94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–28: Minimum optical bandwidth and reference
receiver frequency response hookup 4–100. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–29: 80C01 and 80C03 clock recovery optical sensitivity
range and recovered clock timing jitter hookup 4–104. . . . . . . . . . . . . .
Figure 4–30: Example of the display when the clock signal from the
80C0X-CR Optical Sampling Module is not synchronous with the data
rate input from the pulse pattern generator. Note the unstable (“washed
out”) clock signal. Compare this with Figure 4–31, in which the clock
signal is synchronized. 4–108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–31: Example of the display when the clock signal from the
80C0X-CR Optical Sampling Module is synchronous with the data rate
input from the pulse pattern generator. Note the stable clock signal
waveform. Compare this with Figure 4–30, in which the clock signal is
not synchronized. 4–109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–32: Example of the display zoomed in to 10 mV/div and 10 ps/div
at the crossing point (50%) on the recovered clock signal (C3). 4–110.
Figure 4–33: 80A00 test hookup 4–112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–1:Adjustment setup using the DMM 5–3. . . . . . . . . . . . . . . . . .
Figure 5–2:Adjustment setup using the signal generator 5–5. . . . . . . . . .
Figure 6–1: Knob removal 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Trim removal 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–3: Bottom cover removal 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–4: Cover removal 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–5: Cover removal 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–6: Line fuses and line cord removal 6–17. . . . . . . . . . . . . . . . . . . .
Figure 6–7: External modules 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–8: Internal modules 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–9: Acquisition modules 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–10: Front panel assembly removal 6–23. . . . . . . . . . . . . . . . . . . . .
Figure 6–11: J1 flex cable connector removal 6–24. . . . . . . . . . . . . . . . . . . .
Figure 6–12: Front panel board & keyboard removal 6–25. . . . . . . . . . . . .
Figure 6–13: Display removal 6–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–14: Touch panel & LCD assembly removal 6–28. . . . . . . . . . . . .
Figure 6–15: Display adaptor board removal 6–29. . . . . . . . . . . . . . . . . . . .
Figure 6–16: Standby/On switch flex circuit removal 6–30. . . . . . . . . . . . .

Table of Contents
CSA8000 & TDS8000 Instruments and Sampling Modules vii
Figure 6–17: Floppy disk drive removal 6–32. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–18: Hard drive disk removal 6–33. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–19: Removing the hard disk drive from the cartridge 6–33. . . . .
Figure 6–20: CD drive & bracket removal 6–35. . . . . . . . . . . . . . . . . . . . . .
Figure 6–21: Fan assembly removal 6–36. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–22: Front & rear power distribution board removal 6–37. . . . . .
Figure 6–23: Low-voltage power supply removal 6–39. . . . . . . . . . . . . . . .
Figure 6–24: NLX assembly removal 6–41. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–25: Riser adapter & NLX board removal 6–43. . . . . . . . . . . . . . .
Figure 6–26: Microprocessor removal 6–45. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–27: Processor board removal 6–47. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–28: T-10 screws and threaded posts 6–49. . . . . . . . . . . . . . . . . . . .
Figure 6–29:Acquisition circuit board assembly removal 6–50. . . . . . . . .
Figure 6–30: Large module interface circuit board removal 6–52. . . . . . .
Figure 6–31: Small and Large module chassis removal 6–54. . . . . . . . . . . .
Figure 6–32: Module door spring removal 6–56. . . . . . . . . . . . . . . . . . . . . .
Figure 6–33: Module slot door removal 6–57. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–34: Module ejector handles removal 6–59. . . . . . . . . . . . . . . . . . .
Figure 6–35: Spring arm position 6–60. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–36: Electrical module hardware removal 6–61. . . . . . . . . . . . . . .
Figure 6–37: Optical module cover removal 6–63. . . . . . . . . . . . . . . . . . . . .
Figure 6–38: 80A01 parts removal 6–64. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–39: Location of power-on and over current LEDs 6–71. . . . . . . .
Figure 6–40: Location of debug pins 6–72. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–41: Connectors J1 and J2 6–73. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–1: CSA8000/TDS8000 series block diagram 9–1. . . . . . . . . . . . .
Figure 9–2: 80E01 Sampling module block diagram 9–2. . . . . . . . . . . . . .
Figure 9–3: 80E02 and 80E03 Sampling module block diagram 9–3. . . .
Figure 9–4: 80E04 TDR/Sampling module block diagram 9–4. . . . . . . . .
Figure 9–5: 80C01 Optical sampling block diagram 9–5. . . . . . . . . . . . . .
Figure 9–6: 80C01 Optical sampling with clock recovery b
lock diagram 9–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–7: 80C02 Optical sampling block diagram 9–7. . . . . . . . . . . . . .
Figure 9–8: 80C02 Optical sampling with clock recovery
block diagram 9–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–9: 80C03 Optical sampling block diagram 9–9. . . . . . . . . . . . . .
Figure 9–10: 80C03 Optical sampling with clock recovery
block diagram 9–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
viii CSA8000 & TDS8000 Instruments and Sampling Modules
Figure 9–11: 80C04 Optical sampling block diagram 9–11. . . . . . . . . . . . .
Figure 9–12: 80C04 Optical sampling with CR-1 clock recovery
block diagram 9–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–13: 80A01 block diagram 9–13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–14: 80C06 Optical sampling block diagram 9–14. . . . . . . . . . . . .
Figure 9–15: 80A01 block diagram 9–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–1: External parts 10–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–2: Front panel and drives 10–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–3: Power supply 10–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–4: Acquisition 10–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–5: Coaxial cables 10–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–6: Electrical modules 10–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–7: Optical modules 10–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–8: 80A01 module 10–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–9: Accessories 10–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
CSA8000 & TDS8000 Instruments and Sampling Modules ix
List of Tables
Table 1–1: System –Signal acquisition 1–1. . . . . . . . . . . . . . . . . . . . . . . .
Table 1–2: System –Timebase 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–3: System –Trigger 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–4: System –Environmental 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–5: CSA8000 and TDS8000 –Power consumption
and cooling 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–6: CSA8000 and TDS8000 –Display 1–7. . . . . . . . . . . . . . . . . . .
Table 1–7: CSA8000 and TDS8000 –Ports 1–7. . . . . . . . . . . . . . . . . . . . .
Table 1–8: CSA8000 and TDS8000 –Data storage 1–8. . . . . . . . . . . . . . .
Table 1–9: CSA8000 and TDS8000 –Mechanical 1–8. . . . . . . . . . . . . . . .
Table 1–10: Certifications and compliances 1–9. . . . . . . . . . . . . . . . . . . . .
Table 1–11: Electrical sampling modules –Descriptions 1–11. . . . . . . . . .
Table 1–12: Electrical sampling modules –Signal acquisition 1–12. . . . . .
Table 1–13: Electrical sampling module (80E04) –TDR system 1–14. . . .
Table 1–14: Electrical sampling modules –Timebase system 1–15. . . . . .
Table 1–15: Electrical sampling modules –Power consumption 1–15. . . .
Table 1–16: Electrical sampling modules –Mechanical 1–16. . . . . . . . . . .
Table 1–17: Optical modules –Descriptions 1–17. . . . . . . . . . . . . . . . . . . .
Table 1–18: Optical modules –Acquisition 1–18. . . . . . . . . . . . . . . . . . . . .
Table 1–19: Optical modules –Clock recovery option (CR) 1–32. . . . . . .
Table 1–20: Optical modules –Mechanical 1–34. . . . . . . . . . . . . . . . . . . . .
Table 1–21: Optical modules –Environmental 1–35. . . . . . . . . . . . . . . . . .
Table 1–22: Module characteristics 1–37. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–23: Environmental specifications 1–38. . . . . . . . . . . . . . . . . . . . . .
Table 1–24: Mechanical specifications 1–38. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–25: Electromagnetic specifications 1–39. . . . . . . . . . . . . . . . . . . . .
Table 2–1:Additional accessory connection information 2–4. . . . . . . . . .
Table 2–2: Line fuses 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–1: Equipment Required 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CSA8000/TDS8000 Test Record 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80E00 Test Record 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80C00 Test Record 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–2: DC Voltage measurement accuracy 4–58. . . . . . . . . . . . . . . . . .
Table 4–3: Data for calculation of gain and linearity 4–61. . . . . . . . . . . . .

Table of Contents
xCSA8000 & TDS8000 Instruments and Sampling Modules
Table 4–4: Computed rise time 4–66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–5: Power reference 4–68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–6: DUT (device under test) reference response 4–71. . . . . . . . . . .
Table 4–7: Dark level and vertical equivalent optical noise limits 4–87. . .
Table 4–8: Minimum optical bandwidth limits 4–95. . . . . . . . . . . . . . . . . .
Table 4–9: Reference receiver frequency response limits 4–96. . . . . . . . . .
Table 4–10: Clock recovery settings 4–107. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–1:Adjustments required for module replaced 5–1. . . . . . . . . . . .
Table 5–2: Required equipment and materials 5–2. . . . . . . . . . . . . . . . . .
Table 6–1: External inspection check list 6–3. . . . . . . . . . . . . . . . . . . . . . .
Table 6–2: Internal inspection check list 6–4. . . . . . . . . . . . . . . . . . . . . . .
Table 6–3: Tools required for module removal 6–8. . . . . . . . . . . . . . . . . .
Table 6–4: Failure symptoms and possible causes 6–67. . . . . . . . . . . . . . . .
Table 6–5: Power supply voltages 6–73. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6–6:Action required for module replaced 6–76. . . . . . . . . . . . . . . . .
Table 6–7: BIOS error messages 6–77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6–8: Beep codes 6–79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7–1:Available sampling modules 7–1. . . . . . . . . . . . . . . . . . . . . . . .
Table 7–2: Standard accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7–3: Optional accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CSA8000 & TDS8000 Instruments and Sampling Modules xi
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.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use. Power cord needed only in the mainframe, not
modules.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Ground the Product. The mainframe 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.
Ground the Product. The modules are indirectly grounded through the grounding
conductor of the mainframe 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 apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
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 SuspectedFailures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
To Avoid Fire or
Personal Injury

General Safety Summary
xii CSA8000 & TDS8000 Instruments and Sampling Modules
Do Not Operate in Wet/DampConditions.
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. 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 WARNING High Voltage ProtectiveGround
(Earth) Terminal
Symbols and Terms

CSA8000 & TDS8000 Instruments and Sampling Modules xiii
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.

Service Safety Summary
xiv CSA8000 & TDS8000 Instruments and Sampling Modules

CSA8000 & TDS8000 Instruments and Sampling Modules xv
Preface
This is the service manual for the CSA8000 Communications Signal Analyzer,
TDS8000 Digital Sampling Oscilloscope and the sampling and other modules
that install in both instruments. 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.
Manual Structure
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.
Manual Conventions
This manual uses certain conventions that you should become familiar with
before attempting service.
Throughout this manual, the term module appears. A module is composed of
electrical and mechanical assemblies, circuit cards, interconnecting cables, and a
user-accessible front panel. “Sampling modules,”such as electrical sampling and
optical sampling modules, refer to products.
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 Service Safety Summary found
at the beginning of this manual.
Modules
Replaceable Parts
Safety

Preface
xvi CSA8000 & TDS8000 Instruments and Sampling Modules
Related Documentation
The instrument, electrical sampling modules and optical sampling modules come
with the following manuals:
HCSA8000/TDS800 User manual. Tektronix part number 071-0443-XX.
HCSA8000/TDS800 Reference manual. Tektronix part number 071-0437-XX.
H80E01, 80E02, 80E03, and 80E04 Electrical Sampling Modules User
manual. Tektronix part number 071-0434-XX.
H80C00 Series Optical Sampling Modules User manual. Tektronix part
number 071-0435-XX.
HCSA8000/TDS800 Rackmount Kit Instructions. Tektronix part number
071-0696-XX.
H80A01 Trigger Prescale Preamplifier Module. Tektronix part number
071–0438–XX.