Tektronix TVS621, TVS645, TVS641, TVS625 User Manual
Service Manual
TVS600 Series
Waveform Analyzers
(TVS621, TVS625, TVS641 & TVS645)
070-9285-00
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 the Safety Summary prior to
performing service.
Copyright E Tektronix, Inc. 1995. All rights reserved. Licensed software products are owned by Tektronix or its suppliers
and are protected by United States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at F AR 52.227-19, as applicable.
T ektronix 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.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship
for a period of three (3) years from the date of shipment. If a product proves defective during this warranty period,
T ektronix, 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.
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. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by T ektronix, with shipping charges prepaid.
T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than T ektronix 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-T ektronix 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 IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A P ARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO
REP AIR 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 ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specification T ables 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Logical Address 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring the VXIbus Mainframe 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation into VXIbus Mainframe 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal from VXIbus Mainframe 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connectors and Indicators 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-On Procedure 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Cal Mode 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self T ests 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Commands Used for Maintenance 2–15. . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation
Theory of Operation 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Level Description 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input/Output Connectors 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition Board (A2) 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processor Board (A1) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Performance Verification 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Incoming Inspection Procedure Overview 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Equipment Requirements 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Summary 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedure Overview 4–2. . . . . . . . . . . . . . . . . . . . . . . . . .
T est Equipment Requirements 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Record 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Summary 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TVS600 Series Waveform Analyzers Service Manual
i
Contents
Incoming Inspection Procedure 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purpose 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Interval 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Equipment 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About the System Setup 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect the VXIbus T est System 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Tests 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional T ests 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measure Time Reference 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measure Voltage Reference 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Cal 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIDUCIAL INPUT Check 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedure 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purpose 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Interval 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Equipment 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Software 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performing the T ests 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Sequences 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Instructions 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect the VXIbus T est System 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Adjust/PV Software Installation 4–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Field Adjust/PV Software 4–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Record 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printing or Viewing the Test Record 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting T est Record Results Options 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Results Files Created by the Field Adjust/PV Software 4–30. . . . . . . . . . . .
Help Utility 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Help 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupt Utility 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Interrupt 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures
ii
Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purpose 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Interval 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Performance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Personnel 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warmup Period 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T est Equipment 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Software 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performing the Adjustments 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Sequences and Dependencies 5–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment After Repair 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TVS600 Series Waveform Analyzers Service Manual
Maintenance
Contents
Adjustment Instructions 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect the VXIbus T est System 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Adjust/PV Software Installation 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Field Adjust/PV Software 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Help Utility 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Help 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupt Utility 5–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Interrupt 5–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Maintenance Procedures 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing ESD 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Disposal 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Care 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning Procedures 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation Procedures 6–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation — Please Read 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Modules 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Procedures 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T ools Required 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ejector Handles 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Cover 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processor Board 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Interface Cable Assembly 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BNC Connectors 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coaxial Cable Assembly 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Interface 6–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition Board 6–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Diagnostics 6–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TVS600 Diagnostics 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel Indicators 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Procedure 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packaging 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options
Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Parts List
Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TVS600 Series Waveform Analyzers Service Manual
iii
Contents
Diagrams
Mechanical Parts List
Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Parts List 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part Number Revision Level 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Servicing 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mfr. Code to Manufacturer Cross Index 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
TVS600 Series Waveform Analyzers Service Manual
List of Figures
Contents
Figure 2–1: Logical address switches 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2: Module retainer screws and ejector mechanism 2–5. . . . . . .
Figure 2–3: Waveform analyzer front panel 2–7. . . . . . . . . . . . . . . . . . . . .
Figure 2–4: Typical time base clock signal waveform
(50 W impedance) 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: Typical VXIbus test system for maintenance
procedures 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–1: Typical VXIbus test system for the Incoming
Inspection Procedure 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2: Time reference test setup 4–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–3: Voltage reference test setup 4–9. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–4: Measurement of the FIDUCIAL input functionality 4–11. . .
Figure 4–5: FIDUCIAL input check setup 4–11. . . . . . . . . . . . . . . . . . . . . .
Figure 4–6: VXIbus test system for the Performance
Verification Procedure 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–7: The first user identification screen 4–22. . . . . . . . . . . . . . . . . .
Figure 4–8: Initial setup for the DC_GAIN_ACCURACY,
OFFSET_ACCURACY, and VERT_DCACCUR tests 4–24. . . . . . . . .
Figure 4–9: Initial setup for the VERT_BANDWIDTH,
TIMEBASE_ACCURACY, GLITCH_TRIG_ACC, and
TRIG_MAIN_SENS tests 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–10: Initial setup for the DELAY_MATCH and
TRIG_DELAY_SENS tests 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–11: Initial setup for the MAIN_TRIG_ACC and
TRIG_DELAY_ACC tests 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–12: Initial setup for the REFERENCE_OUT test 4–26. . . . . . . .
Figure 4–13: Initial setup for the PROBE_COMPENSATION
test 4–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–14: Using the power meter to monitor the output
amplitude of the sine wave generator 4–27. . . . . . . . . . . . . . . . . . . . . . .
Figure 4–15: Connecting a printer to the VXIbus test system 4–29. . . . . .
Figure 4–16: Typical help screen 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–17: Typical Interrupt Screen 4–33. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–1: Test system configuration 5–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–2: The first user identification screen 5–8. . . . . . . . . . . . . . . . . .
TVS600 Series Waveform Analyzers Service Manual
v
Contents
Figure 5–3: Initial setup for the EXTERNAL_CAL adjustment
(CVR cal section) 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–4: Initial setup for the EXTERNAL_CAL adjustment
(EXT TRIG cal section) 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–5: Initial setup for the BANDWIDTH_CAL,
GLITCH_TRIG_CAL, and PNP_LATENCY_CAL
adjustments 5–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–6: Initial setup for the CHAN_SKEW_CAL adjustment 5–11. .
Figure 5–7: Using the power meter to monitor the output
amplitude of the sine wave generator 5–12. . . . . . . . . . . . . . . . . . . . . . .
Figure 5–8: Typical help screen 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–9: Typical interrupt screen 5–15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1: Ejector handle replacement 6–9. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Module cover removal 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–3: Processor board removal 6–13. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–4: Inserting processor board tab into front subpanel 6–14. . . . .
Figure 6–5: Serial interface connector removal 6–15. . . . . . . . . . . . . . . . . .
Figure 6–6: BNC replacement 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–7: Fuse replacement 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–8: Coaxial cable assembly replacement 6–20. . . . . . . . . . . . . . . . .
Figure 6–9: Dress of coaxial cable assembly 6–21. . . . . . . . . . . . . . . . . . . . .
Figure 6–10: Probe interface replacement 6–23. . . . . . . . . . . . . . . . . . . . . .
Figure 6–11: Acquisition board replacement 6–25. . . . . . . . . . . . . . . . . . . .
Figure 6–12: Primary troubleshooting procedure 6–32. . . . . . . . . . . . . . . .
Figure 6–13: Probe power voltage check 6–33. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–14: Power supply troubleshooting procedure 6–34. . . . . . . . . . . .
Figure 6–15: DC voltages for troubleshooting 6–35. . . . . . . . . . . . . . . . . . .
Figure 6–16: Probe interface resistance 6–36. . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–1: Interconnections 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–2: Block diagram 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–1: Waveform analyzer exploded view 10–6. . . . . . . . . . . . . . . . .
vi
TVS600 Series Waveform Analyzers Service Manual
List of Tables
Contents
Table 1–1: Comparison of Product Features 1–1. . . . . . . . . . . . . . . . . . . .
Table 1–2: Signal Acquisition System 1–2. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–3: Timebase System 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–4: Trigger System 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–5: Front Panel Connectors 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–6: VXI Interface 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–7: Power Distribution and Data Handling 1–12. . . . . . . . . . . . . . .
Table 1–8: Environmental 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–9: Certifications and Compliances 1–13. . . . . . . . . . . . . . . . . . . . .
Table 1–10: Mechanical 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–1: Self Cal Results 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–2: Self Test Results 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–3: Service-related Commands 2–15. . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–1: Factory Default RS-232 Settings 4–5. . . . . . . . . . . . . . . . . . . .
Table 4–2: Field Adjust/PV Software PV Tests 4–15. . . . . . . . . . . . . . . . . .
Table 4–3: Test Equipment 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4–4: Function Keys for SELECT TEST(S) Mode 4–21. . . . . . . . . . .
Table 5–1: Adjustments and Dependencies 5–3. . . . . . . . . . . . . . . . . . . . .
Table 5–2: Adjustments After Repair 5–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–3: Test Equipment 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–4: Function Keys for SELECT TEST(S) Mode 5–7. . . . . . . . . . .
Table 6–1: External Inspection Check List 6–4. . . . . . . . . . . . . . . . . . . . .
Table 6–2: Internal Inspection Check List 6–5. . . . . . . . . . . . . . . . . . . . . .
Table 6–3: Tools Required for Module Replacement 6–8. . . . . . . . . . . . .
Table 6–4: Failure Symptoms and Possible Causes 6–29. . . . . . . . . . . . . . .
Table 6–5: Primary Fault Location Table 6–33. . . . . . . . . . . . . . . . . . . . . .
Table 6–6: Power Supply Fault Location Table 6–36. . . . . . . . . . . . . . . . . .
TVS600 Series Waveform Analyzers Service Manual
vii
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
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.
Injury Precautions
Product Damage
Precautions
Avoid Electric Overload. To avoid electric shock or fire hazard, do not apply a
voltage to a terminal that is outside the range specified for that terminal.
Avoid Electric Shock. To avoid injury or loss of life, do not connect or disconnect
probes or test leads while they are connected to a voltage source.
Ground the Product. This product is 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.
Do Not Operate Without Covers. To avoid electric shock or fire hazard, do not
operate this product with covers or panels removed.
Use Proper Fuse. To avoid fire hazard, use only the fuse type and rating specified
for this product.
Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not operate
this product in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere. To avoid injury or fire hazard, do not
operate this product in an explosive atmosphere.
Provide Proper Ventilation. To prevent product overheating, provide proper
ventilation.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
TVS600 Series Waveform Analyzers Service Manual
ix
General Safety Summary
Symbols and Terms
T erms 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.
T erms 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:
Certifications and
Compliances
DANGER
High Voltage
Protective Ground
(Earth) T erminal
ATTENTION
Refer to Manual
Double
Insulated
Refer to the specifications section for a listing of certifications and compliances
that apply to this product.
x
TVS600 Series Waveform Analyzers 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, disconnect the main power by means
of the power cord or, if provided, the power switch.
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.
TVS600 Series Waveform Analyzers Service Manual
xi
Preface
Manual Structure
This is the service manual for the waveform analyzer. Use the information in this
manual to service the waveform analyzer to the module level.
This manual is divided into chapters, such as Specifications and Performance
Verification. Within each chapter, the information is further divided into
subsections such as Product Description and Equipment Required.
Subsections that contain procedures also contain introductions before the
procedures. Be sure to read these introductions because they provide information
that is needed to do the service correctly and efficiently. The following list
provides a brief description of the chapters contained in this manual:
H
Specifications describes the waveform analyzer and the characteristics that
apply to it.
H
Operating Information includes general information and operating instructions at the level needed to safely power on and service the waveform
analyzer.
H
Theory of Operation contains circuit descriptions that support general service
to the module level.
H
Performance Verification contains procedures to verify that the waveform
analyzer functions properly and meets warranted specifications.
H
Adjustment Procedures contains procedures for adjusting the waveform
analyzer to meet warranted specifications.
H
Maintenance contains information and procedures for performing preventive
and corrective maintenance. These instructions include cleaning, module replacement, and fault isolation to the module level.
H
Options describes standard accessories, optional accessories, and options that
may be installed in the waveform analyzer.
H
Electrical Parts List refers you to Mechanical Parts List, where both
electrical and mechanical modules are listed. See below.
H
Diagrams contains a block diagram and an interconnection diagram that are
useful when isolating failed modules.
H
Mechanical Parts List contains an illustration that shows all replaceable
modules, and a table that lists the replaceable modules, their descriptions,
and their Tektronix part numbers.
TVS600 Series Waveform Analyzers Service Manual
xiii
Preface
Manual Conventions
This manual uses certain conventions that you should become familiar with.
Modules
Safety
Related Manuals
Throughout this manual, any replaceable component, assembly, or part of the
waveform analyzer is referred to generically as a “module.” In general, a module
is an assembly (circuit board), rather than a component (resistor or integrated
circuit). Sometimes a single component is a module; for example, each ejector
handle is a module.
Symbols and terms related to safety appear in the General Safety Summary near
the front of this manual.
The following manuals are related to the use of the waveform analyzer:
H
The TVS600 Series Waveform Analyzers User Manual (Tektronix part
number 070-9283-XX).
H
The TVS600 Series Waveform Analyzers Reference Manual (Tektronix part
number 070-9284-XX) provides a pocket-sized listing of frequently used
instrument commands.
xiv
TVS600 Series Waveform Analyzers Service Manual
Introduction
Adjustment Interval
This manual contains information needed to properly service the waveform
analyzer, as well as general information critical to safe and effective servicing.
To prevent personal injury or damage to the waveform analyzer, consider the
following before attempting service:
H
The procedures in this manual should be performed only by a qualified
service person
H
Read the General Safety Summary and Service Safety Summary found at the
beginning of this manual
H
Read Operating Information beginning on page 2–1
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Generally, you should perform the adjustments described in the Adjustment
Procedures once a year. In addition, adjustment is recommended after module
replacement.
Strategy for Servicing
Throughout this manual, the term “module” refers to any field-replaceable
component, assembly, or part of the waveform analyzer.
This manual contains all the information needed for periodic maintenance of the
waveform analyzer. (Examples of such information are procedures for checking
performance and for readjustment.)
Further, the manual contains all information for corrective maintenance down to
the module level. Refer to the sections indicated to perform the following
maintenance procedures:
H
Use the fault isolation procedures found in Troubleshooting (page 6–27) to
isolate a fault to a module
H
Follow the instructions in Removal and Installation Procedures (page 6–7)
to remove and replace any failed module
H
After isolating a faulty module, replace it with a fully-tested module
obtained from the factory; the Mechanical Parts List section contains part
number and ordering information for all replaceable modules.
TVS600 Series Waveform Analyzers Service Manual
xv
Introduction
Tektronix Service Offerings
Tektronix provides service to cover repair under warranty as well as other
services that may provide a cost-effective answer to your service needs.
Whether providing warranty repair service or any of the other services listed
below, Tektronix service technicians are well equipped to service the waveform
analyzer. Tektronix technicians train on Tektronix products; they have access to
the latest information on improvements to the waveform analyzer as well as the
latest new options.
Warranty Repair Service
Repair or Calibration
Service
Tektronix warrants this product for three years from date of purchase. (The
warranty appears behind the title page in this manual.) Tektronix technicians
provide warranty service at most Tektronix service locations worldwide. The
Tektronix product catalog lists all service locations worldwide.
The following services can be purchased to tailor repair and/or calibration of the
waveform analyzer to fit your requirements.
At-Depot Service. Tektronix offers several standard-priced adjustment (calibration) and repair services:
H
A single repair and/or adjustment
H
Calibrations using equipment and procedures that meet the traceability
standards specific to the local area
H
Annual maintenance agreements that provide for either calibration and
repair, or calibration only of the waveform analyzer
Of these services, the annual maintenance agreement offers a particularly
cost-effective approach to service for many owners of the waveform analyzer.
xvi
Self Service
Tektronix supports repair to the module level by providing Module Exchange.
Module Exchange. Use this service to reduce down-time for repair by exchanging
modules for remanufactured ones. Tektronix ships an updated and tested
exchange module from the Beaverton, Oregon service center, typically within
24 hours. Each module comes with a 90-day service warranty.
For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of the repair or adjustment services just
described.
TVS600 Series Waveform Analyzers Service Manual
Specifications
Product Description
This chapter provides a complete description of the waveform analyzer specifications. Product Description (below) is a general description of the instrument.
The Specification Tables, which begin on page 1–2, contain the complete
specifications for the waveform analyzer.
The TVS600 Series Waveform Analyzers are a family of C-size, double-wide
VXI modules suitable for use in a variety of test and measurement applications
and systems. Many key features are listed below:
H
Four standard configurations with full-featured, 1 MW/50Winputs: TVS641
and TVS645 have four channels, TVS621 and TVS625 have two channels.
H
A maximum realtime digitizing rate up to 5 GSample/second with an analog
bandwidth up to 1 GHz. See Table 1–1 for details.
T able 1–1: Comparison of Product Features
Product Input Channels Maximum Sample Rate Analog Bandwidth
TVS645 4 5 GSample/second 1 GHz
TVS641 4 1 GSample/second 250 MHz
TVS625 2 5 GSample/second 1 GHz
TVS621 2 1 GSample/second 250 MHz
H
A maximum record length of 30,000 samples with 8-bit vertical resolution.
H
Full programmability using a SCPI command set.
H
Acquisition modes such as sample, envelope, and average.
H
A full complement of internal triggering modes such as edge and pulse, plus
VXI backplane and external trigger sources.
TVS600 Series Waveform Analyzers Service Manual
1–1
Specifications
Specification Tables
This section contains tables that list the specifications for the waveform analyzer.
All specifications are guaranteed unless noted “typical.” Specifications that are
marked with the n symbol are checked in the Performance Verification section.
The performance limits in this specification are valid with these conditions:
H
The waveform analyzer must have been calibrated/adjusted at an ambient
_
temperature between +20
H
The waveform analyzer must be in an environment with temperature,
C and +30_ C.
altitude, humidity, and vibration within the operating limits described in
these specifications.
H
The waveform analyzer must have had a warm-up period of at least
20 minutes.
H
The waveform analyzer must have had its signal-path-compensation routine
(self cal) last executed after at least a 20 minute warm-up period at an
ambient temperature within
±5_ C of the current ambient temperature.
T able 1–2: Signal Acquisition System
Name Description
n
Accuracy, DC Gain ±1.5% for full scale ranges from 20 mV to 100 V
±2.0% for full scale ranges <19.9 mV
n
Accuracy, DC Voltage Measurement ±(1.5% of input signal + 1% of full scale range) with instrument temperature within
5_ C of Setting-Cal temperature for input ranges ≥50 mV full scale
n
Accuracy, Delta DC Voltage Measurement ±(1.5% of input signal + 0.1% of full scale range) with instrument temperature
within 5_ C of Setting-Cal temperature
n
Accuracy, Offset
1
Full Scale Range Setting Offset Accuracy
10 mV – 1 V
1.01 V – 10 V
10.1 V – 100 V
±[(0.2% × | offset |) + 1.5 mV + (6% × full
scale range)]
±[(0.25% × | offset |) + 15 mV + (6% × full
scale range)]
±[(0.25% × | offset |) + 150 mV + (6% × full
scale range)]
1
Net offset is the nominal voltage level at the waveform analyzer input that corresponds to the center of the A/D Converter
dynamic range. Offset accuracy describes the precision of the net offset voltage.
1–2
TVS600 Series Waveform Analyzers Service Manual
T able 1–2: Signal Acquisition System (Cont.)
or
Selections
ise Time, typical
3
imit,
er, 25
imited, typical
Name Description
nAnalog Bandwidth, DC–50W Coupled
DC–1 MW Coupled
Full Scale Range Setting Bandwidth
10.1 V – 100 V
100 mV – 10 V DC – 1 GHz (TVS625 and TVS645)
50 mV – 99.8 mV DC – 900 MHz (TVS625 and TVS645)
20 mV – 49.8 mV DC – 600 MHz (TVS625 and TVS645)
10 mV – 19.8 mV DC – 500 MHz (TVS625 and TVS645)
Specifications
2
DC – 500 MHz (TVS625 and TVS645)
DC – 250 MHz (TVS621 and TVS641)
DC – 250 MHz (TVS621 and TVS641)
DC – 250 MHz (TVS621 and TVS641)
DC – 250 MHz (TVS621 and TVS641)
DC – 250 MHz (TVS621 and TVS641)
Bandwidth, Analog,
Products Bandwidth Selections
TVS625 and TVS645 20 MHz, 250 MHz, and FULL
TVS621 and TVS641 20 MHz, 180 MHz, and FULL
Calculated R
Typical full-bandwidth rise times are shown in the
chart to the right
Full Scale Range Setting TVS625 and TVS645 TVS621 and TVS641
10.1 V – 100 V
100 mV – 10 V
50 mV – 99 mV
20 mV – 49.9 mV
10 mV – 19.9 mV
900 ps
450 ps
500 ps
750 ps
900 ps
1.8 ns
1.8 ns
1.8 ns
1.8 ns
1.8 ns
Crosstalk (Channel Isolation) ≥300:1 at 100 MHz and ≥100:1 at the rated bandwidth for the channel’s sensitivity
(Full Scale Range) setting, for any two channels having equal sensitivity settings
n
Delay Between Channels, Full Bandwidth ≤100 ps with equal Full Scale Range and Coupling settings
Digitized Bits, Number of 8 bits
Frequency Limit, Upper, 20 MHz Bandwidth
20 MHz
Limited, typical
Frequency L
L
Upp
0 MHz Bandwidth
Products Bandwidth
TVS625 and TVS645 250 MHz
TVS621 and TVS641 180 MHz
2
The limits given are for the ambient temperature range of 0_ C to +30_ C. Reduce the upper bandwidth frequencies by
5 MHz for each _C above +30_ C. The bandwidth must be set to FULL.
3
Rise time (rounded to the nearest 50 ps) is calculated from the bandwidth when Full Bandwidth is selected. It is defined
by the following formula:
Rise Time (ns) = 450 BW (MHz)
TVS600 Series Waveform Analyzers Service Manual
1–3
Specifications
Noise
set
T able 1–2: Signal Acquisition System (Cont.)
Name Description
Input Channels, Number of Product Channels
TVS645 Four
TVS641 Four
TVS625 Two
TVS621 Two
Input Coupling DC, AC, or GND
Input Impedance, DC–1 MW Coupled 1 MW ±0.5% in parallel with 10 pF ±3 pF
4
Input Impedance Selections
Input Resistance, DC–50W Coupled
1 MWWor 50
50
W
±1%
W
Input VSWR, DC–50W Coupled ≤1.3:1 from DC – 500 MHz, ≤1.5:1 from 500 MHz – 1 GHz
Input Voltage, Maximum, DC–1MW, AC–1 MW,
or GND Coupled
Input Voltage, Maximum, DC–50W or AC–50
The greater of ±300 Vrms or DC, derated at 20 dB/decade above 1 MHz
CA T II (see Overvoltage Category Descriptions on page 1–13 for more information)
W
5 V
, with peaks ≤±30 V
RMS
Coupled
Lower Frequency Limit, AC Coupled, typical ≤10 Hz when AC–1 MW Coupled; ≤200 kHz when AC–50W Coupled
n
Random
Bandwidth Selection RMS Noise
Full ≤(350 mV + 0.5% of the Full Scale Range
setting)
250 MHz ≤(165 mV + 0.5% of the Full Scale Range
setting)
20 MHz ≤(75 mV + 0.5% of the Full Scale Range
setting)
Range, Off
Range, Sensitivity (Full Scale Range),
Full Scale Range Setting Offset Range
10 mV – 1 V
1.01 V – 10 V
10.1 V – 100 V
10 mV to 100 V
6
±1 V
±10 V
±100 V
All Channels
5
1–4
4
GND input coupling disconnects the input connector from the attenuator and connects a ground reference to the input of
the attenuator.
5
The AC Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X passive probes are used.
6
The sensitivity ranges are 10 mV to 100 V full scale, switching in a 1–2–5 sequence of coarse settings. Between these
coarse settings, you can adjust the sensitivity with a resolution equal to 1% of the more sensitive coarse setting. For
example, between the 500 mV and 1 V ranges, the sensitivity can be set with 5 mV resolution.
TVS600 Series Waveform Analyzers Service Manual
T able 1–2: Signal Acquisition System (Cont.)
Ste
Settli
rrors, typical
7
Name Description
p Response
ng E
Full Scale Range
Setting
10 mV – 1 V
± Step Response
≤2 V
Specifications
Maximum Settling
Error (%)
20 ns 100 ns 20 ms
0.5% 0.2% 0.1%
at
1.01 V – 10 V
10.1 V – 100 V
≤20 V
≤200 V
T able 1–3: Timebase System
Name Description
n
Accuracy , Long Term Sample Rate and
Delay Time
Range, Extended Realtime Sampling Rate 5 S/s to 10 MS/s in a 1–2.5–5 sequence
Range, Realtime Sampling Rate Products Limits
Record Length 256, 512, 1024, 2048, 4096, 8192, 15,000
Time Stamping 125 ns resolution
±100 ppm over any interval ≥1 ms
TVS625 and
TVS645
TVS621 and
TVS641
20 MS/s to 5 GS/s on all channels simultaneously in a
1–2.5–5 sequence
20 MS/s to 1 GS/s on all channels simultaneously in a
1–2.5–5 sequence
30,000 (extended realtime sampling mode only)
0.1% variance
1.0% 0.5% 0.2%
1.0% 0.5% 0.2%
7
The Full Bandwidth settling errors are typically less than the percentages from the table.
TVS600 Series Waveform Analyzers Service Manual
1–5
Specifications
Accuracy
ime
lse Glitch or
Pulse Widt
eri
evel
T able 1–4: Trigger System
Name Description
n
(T
h Trigg
) for Pu
ng
Time Range Accuracy
1 ns to 1 ms
±(20% of Setting + 0.5 ns)
1.02 ms to 1 s
n
Accuracy (DC) for External Trigger Level ±(5% + 150 mV) for signals having rise and fall times ≥20 ns
n
Accuracy (DC) for Internal Trigger Level,
DC Coupled
Holdoff, Variable Main Trigger , typical
1
±[(2% × | Setting) | + 0.03 of Full Scale Range + Offset Accuracy)] for signals
having rise and fall times ≥20 ns
For all sampling rates, the minimum holdoff is 250 ns and the maximum holdoff is
±(204.5 ns + 0.01% of Setting)
12 s; the minimum resolution is 8 ns for settings ≤1.2 ms
Input, External Trigger, typical
50
W
input resistance; ±5 V (DC + peak AC) maximum safe input voltage;
DC coupled only
Range, Delayed Trigger Time
2
16 ns to 250 s
Range, Events Delay 1 to 10,000,000
Range (Time) for Pulse Glitch and Pulse Width
1 ns to 1 s
Triggering
Range, Trigger L
Source Range
Any Channel
External Input
±100% of full scale range
±1 V
Range, Trigger Point Position Minimum: 0
Maximum: 30,000
Resolution, Trigger Level 0.02% of full scale for any Channel source and 2 mV for the External Input source
Resolution, Trigger Position One sample interval at all sample rates
Sensitivities, Pulse-Type Trigger and Events
Delay , DC Coupled, typical
Sensitivities, Pulse-T ype Trigger Width and
Glitch, typical
1
Main Trigger is controlled with the TRIGger:A commands.
2
Delayed Trigger is controlled with the TRIGger:B commands.
1–6
10% of full scale, from DC to 500 MHz, for Full Scale Range settings >100 mV and
≤10 V at the BNC input
10% of full scale, for Full Scale Range settings >100 mV and ≤10 V at the BNC
input
TVS600 Series Waveform Analyzers Service Manual
T able 1–4: Trigger System (Cont.)
Sensitivity,
er, Not
typical
ime, Minimum Pulse or Rearm,
m
sitio
ime, for Pulse-Type Triggering,
ty
l
typical
ime, Minimum Pulse or Rearm, for Events
Name Description
n
Sensitivity, Edge-Type Trigger, DC
Coupled
3
The minimum signal levels required for stable edge triggering of an acquisition when
the source is DC-coupled.
Products Trigger Source Sensitivity
TVS625 and TVS645 Any Channel 3.5% of Full Scale Range
TVS621 and TVS641 Any Channel 3.5% of Full Scale Range
Specifications
from DC to 50 MHz, increasing to 10% of Full
Scale Range at 1 GHz
from DC to 50 MHz, increasing to 10% of Full
Scale Range at 250 MHz
Edge-Type Trigg
T
Tran
n T
pica
T
Delay Triggering, typical
TVS621, TVS625,
TVS641, and TVS645
DC Coupled,Trigger Coupling
AC Same as the DC-coupled limits for
High Frequency Reject One and one-half times the DC-coupled
Low Frequency Reject One and one-half times the DC-coupled
Noise Reject Three times the DC-coupled limits
and Minimu
For Full Scale Range settings >100 mV and ≤10 V at the BNC input
Pulse Class Minimum Pulse Width Minimum Rearm Width
Glitch 1 ns 2 ns + 5% of Glitch Width
Width 1 ns 2 ns + 5% of Width Upper
The following chart shows the minimum values for input range settings >100 mV and
≤10 V at the BNC input
External 25 mV from DC to
50 MHz, increasing to
50 mV at 100 MHz
Typical Signal Level for Stable Triggering
frequencies above 60 Hz; attenuates
signals below 60 Hz
limits from DC to 30 kHz; attenuates
signals above 30 kHz
limits for frequencies above 80 kHz;
attenuates signals below 80 kHz
Setting
Limit Setting
3
Delayed Trigger has the same specifications as Main Trigger.
4
For Events Delay , the time is the minimum time between a main and delayed event that will be recognized if more than
one channel is used.
TVS600 Series Waveform Analyzers Service Manual
Triggering Type Minimum Pulse
Width
Events Delay 1 ns (for either + or
Minimum Rearm
Time
Minimum Time
Between
Channels
N/A 2 ns
4
– pulsewidths)
1–7
Specifications
Positio
rror,
ering, typical
T able 1–4: Trigger System (Cont.)
Name Description
Trigger
n E
Edge Trigg
Acquisition Mode Trigger Position Error
5
Sample, Average
Envelope
±(1 Sample Interval + 1 ns)
±(2 Sample Intervals
+ 2 ns)
1–8
5
The trigger position errors are typically less than the values given here. These values are for triggering signals having a
slew rate at the trigger point of ≥5% of full scale/ns.
TVS600 Series Waveform Analyzers Service Manual
T able 1–5: Front Panel Connectors
Arm I
t
l
1
Name Description
npu
This input provides external arming capability with a BNC connector
Characteristic Limits
Arming Threshold Voltage ≤0.8 V
Input Voltage Range 0 to 5 Vpk, TTL-compatible (arms on a
Latency 10 ms
Minimum Pulsewidth 10 ms
Specifications
switch closure to ground; internal pull-up
resistor to +5 volts is provided)
Fiducial Input, typica
This input provides fiducial input capability with a BNC connector; the polarity of the
signal acquired is inverted with respect to the input
Characteristic Limits
Fiducial Input/CH 1 HF Gain Ratio –6 ±25% (CH 1 set to 1 V Full Scale
Range)
Input Impedance 0.01 mF in series with 50
W
Input LF Attenuation Attenuates signals below 100 MHz
(highpass time constant of 5 ns)
Input Sensitivity
CH 1 Full Scale
Range
Fiducial Full Scale
Range
10 mV to 1 V 6 times the CH 1
Full Scale Range
setting
1.01 V to 10 V 0.6 times the CH 1
Full Scale Range
setting
10.1 V to 100 V 0.06 times the
CH 1 Full Scale
Range setting
Input Voltage Range ±1 V
1
The FIDUCIAL Input is designed for short-duration (≤3 ns) fast rise time (≤2 ns) pulse signals.
TVS600 Series Waveform Analyzers Service Manual
Maximum Input 2 V
RMS
Rise Time Products Rise Time
TVS625 and
TVS645
TVS621 and
TVS641
≤2.5 ns (10% to
90%)
≤3 ns (10% to
90%)
1–9
Specifications
erence
T able 1–5: Front Panel Connectors (Cont.)
Name Description
nOutput, Ref
Probe Compensation, Output Frequency, typical 1 kHz ±25%
n
Probe Compensation, Output Voltage 0.5 V (base-top) ±1% into a ≥50 W load
Serial Interface This front panel-mounted 9-pin D connector provides a serial interface with the
Characteristic Limits
Output Voltage 8 V ±1%
Internal Frequency Reference Frequency is 10 MHz ±0.015%
Amplitude is ≥1 V
following pin assignments:
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 No Connection
into 50
p-p
W
1–10
TVS600 Series Waveform Analyzers Service Manual
Specifications
Outputs,
evels
T able 1–6: VXI Interface
Name Description
Addressing Dynamic autoconfigure or set manually
Inputs, ECLTRG Either of the two ECLTRG lines may be individually selected to arm or trigger an
acquisition
Inputs, TTLTRG Any of the eight TTLTRG lines may be individually selected to arm or trigger an
acquisition
Interface Type Message based (I4)
Interrupts Programmable interrupter level 1–7
Outputs, ECLTRG Either of the two ECLTRG lines can be driven by the following signals:
ARM — The waveform analyzer is armed and waiting for a trigger
ATR — Main trigger event has occurred
BTR — Delayed trigger event has occurred
OPC — Operation pending complete
Outputs, TTL Each of the TTLTRG lines (TTLTRG0*–TTLTRG7*) can be driven by the following
signals:
ARM — The waveform analyzer is armed and waiting for a trigger
ATR — Main trigger event has occurred
BTR — Delayed trigger event has occurred
OPC — Operation pending complete
TTLTRG, Logic L
Outputs, TTL TRG, Logic Polarity Normal polarity: Negative TRUE; high-to-low transition indicates the event occurred
Protocols Word Serial (WSP)
VXI Interface Complies with revision 1.4
Based on the VXIbus Specification RULE B.6.17
Characteristic Limits
Vout(HI)
Vout(LO)
Inverted polarity: Positive TRUE; low-to-high transition indicates the event occurred
Fast Data Channel FDC TEK V2.1
Determined by the mainframe termination;
the TTL outputs are open collector
≤0.6 V when sinking 48 mA
TVS600 Series Waveform Analyzers Service Manual
1–11
Specifications
T able 1–7: Power Distribution and Data Handling
Name Description
Current Requirements, TVS641 and TVS645, typical Voltage DC Current Dynamic Current
+12 V 1.3 A 0.45 A
+5 V 11.0 A 0.8 A
–5.2 V 4.6 A 0.09 A
–12 V 1.0 A 0.4 A
Current Requirements, TVS621 and TVS625, typical Voltage DC Current Dynamic Current
+12 V 1.0 A 0.45 A
+5 V 8.0 A 0.7 A
–5.2 V 2.7 A 0.05 A
–12 V 0.8 A 0.4 A
Nonvolatile Memory Retention Time, typical
Power Requirements, typical Products Power Requirements
1
Battery life is ≥6 months
TVS641 and TVS645 106.5 Watts
TVS621 and TVS625 75.6 Watts
T able 1–8: Environmental
Name Description
Airflow Resistance ≤0.178 mm H2O air pressure with 6.6 l/s airflow
Altitude, Operating and Nonoperating Operating: to 15,000 feet (4570 m)
Nonoperating: to 40,000 feet (12,190 m)
Humidity , Operating and Nonoperating To 95% relative humidity at or below +30_ C; to 45% relative humidity up to +50_ C
Temperature, Operating and Nonoperating Operating: 0_ C to +50_ C for exterior air when operated in a mainframe with 15_ C
internal temperature rise, and airflow of 0.75 mm H
Nonoperating: –40_ C to +71_ C
O air pressure @ 2 l/s
2
1
The time that reference waveforms, stored setups, and calibration constants are retained when there is no power to the
waveform analyzer.
1–12
TVS600 Series Waveform Analyzers Service Manual
T able 1–9: Certifications and Compliances
ertifications
riters
tories listed to CAN/CSA
riters
tories listed to St
lectrical
lectronic
Name Description
Specifications
C
EC Declaration of Conformity Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage
FCC Compliance Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class
Overvoltage Category Descriptions
CA T I: Signal levels in special equipment or parts of equipment, telecommunications, electronics.
Underw
Underw
Measuring and Testing Equipment.
Directive 73/23/ECC for Product Safety. Compliance was demonstrated to the following
specifications as listed in the Official Journal of the European Communities:
EMC Directive 89/336/EEC:
EN 50081-1 Emissions:
EN 50082-1 Immunity:
Low Voltage Directive 73/23/EEC:
EN 61010-1 Safety requirements for electrical equipment for
A Limits
CA T II (see Input V oltage, Maximum, DC–1MW, AC–1 MW, or GND Coupled on
page 1–4)
Labora
Labora
EN 55011 Class A Radiated and Conducted Emissions
EN 60555-2 AC Power Line Harmonic Emissions
IEC 801-2 Electrostatic Discharge Immunity
IEC 801-3 RF Electromagnetic Field Immunity
IEC 801-4 Electrical Fast T ransient/Burst Immunity
measurement, control, and laboratory use
-C22.2 No.1010.1-92.
andard UL3111-1 for E
and E
CA T II: Local-level mains, appliances,
portable equipment.
CA T III: Distribution-level mains, fixed
installation.
Pollution Degree 2 Do not operate in environments where conductive pollutants may be present.
Safety Certification of Plug-in or VXI
Modules
For modules (plug-in or VXI) that are safety certified by Underwriters Laboratories, UL
Listing applies only when the module is installed in a UL Listed product.
For modules (plug-in or VXI) that have cUL or CSA approval, the approval applies only
when the module is installed in a cUL or CSA approved product.
TVS600 Series Waveform Analyzers Service Manual
1–13
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