Tektronix 420, 460, 410 Service Manual
Service Manual
TDS 410, 420 & 460
Digitizing Oscilloscopes
070–8036–02
Please check for change information at the rear
of this manual.
Third Edition: February 1994
Last Revised: May 31, 1994
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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Instrument Serial Numbers
Each instrument manufactured by Tektronix has a serial number on a panel insert or tag, or stamped on the
chassis. The first letter in the serial number designates the country of manufacture. The last five digits of the
serial number are assigned sequentially and are unique to each instrument. Those manufactured in the United
States have six unique digits. The country of manufacture is identified as follows:
B010000 Tektronix, Inc., Beaverton, Oregon, USA
E200000 Tektronix United Kingdom, Ltd., London
J300000 Sony/Tektronix, Japan
H700000 Tektronix Holland, NV, Heerenveen, The Netherlands
Instruments manufactured for Tektronix by external vendors outside the United States are assigned a two digit
alpha code to identify the country of manufacture (e.g., JP for Japan, HK for Hong Kong, IL for Israel, etc.).
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
Printed in U.S.A.
Copyright E Tektronix, Inc., 1993, 1994. All rights reserved. Tektronix products are covered by U.S. and
foreign patents, issued and pending. The following are registered trademarks: TEKTRONIX, TEK, TEKPROBE,
and SCOPE-MOBILE.
WARRANTY
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from
the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair
the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
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 Tektronix, with shipping charges prepaid.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; or c) to service a product that has been modified or
integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing
the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR
REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR
BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE
VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
Safety Summary xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Structure xxi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Conventions xxii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modules xxii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety xxii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols xxii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals xxii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction xxiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Servicing xxiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strategy for Servicing xxiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T ektronix Service xxiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Repair Service xxiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair or Calibration Service xxiv. . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Service xxv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Product Description 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menus 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicators 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Knob 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GUI 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Acquisition System 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal System 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger System 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition Control 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-Board User Assistance 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Help 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Autoset 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Assistance 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cursor 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measure 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Signal Processing (DSP) 1-5. . . . . . . . . . . . . . . . . . . . . . . . .
Storage and I/O 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 410, TDS 420 & TDS 460 Service Manual
v
Operating Information
Zoom 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Traits 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Conditions 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T ypical Characteristics 1-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplying Operating Power 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cord Information 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Voltage 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Backup Power 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Environment 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation Requirements 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applying and Interrupting Power 2-4. . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Up 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Down 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installed Options 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation
Performance Verification
Operating Information 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screen Layout 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Procedures 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Power Up 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use Help 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use the Status Menu 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Set Functions 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Set Complex Functions 2-12. . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Conventions 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Overview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brief Procedures 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Instructions 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vv
Contents
Conventions 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Tests 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify Internal Adjustment, Self Compensation, and
Diagnostics 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Tests 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify All Input Channels 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Time Base 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verify the Main and Delayed Trigger Systems 4-9. . . . . . . . . . . . .
Performance Tests 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prerequisites 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Record 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Acquisition System Checks 4-18. . . . . . . . . . . . . . . . . . . . . . . .
Check Offset Accuracy 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check DC Voltage Measurement Accuracy (Averaged) 4-20. . . . .
Check Analog Bandwidth 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Delay Match Between Channels 4-27. . . . . . . . . . . . . . . . . .
Time Base System Checks 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy for Long-Term Sample Rate, Delay
Time, and Delta Time Measurements 4-31. . . . . . . . . . . . . . . . .
Trigger System Checks 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Accuracy, Trigger Level or Threshold, DC Coupled 4-35. .
Sensitivity, Edge Trigger, DC Coupled 4-38. . . . . . . . . . . . . . . . . . . .
Maximum Input Frequency, Auxiliary Trigger 4-42. . . . . . . . . . . . . .
Check Video Trigger Sensitivity (Option 05 Equipped
Models Only) 4-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Signal Check 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Probe Adjust Output 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures
TDS 410, TDS 420 & TDS 460 Service Manual
Adjustment Procedures 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Requirements for Performance 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Personnel 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warm-up Period 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Equipment 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Usage 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performing the Adjustments 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Complete Adjustment 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Individual Adjustments 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Partial Adjustment 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment After Repair 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Dependencies 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vvv
Maintenance
Equipment Required 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Instructions 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hardware Installation 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Installation 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software-Based Adjustments 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Adjustment 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensate the Probe 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measure the Probe Bandwidth 5-11. . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust the Probe — High Frequency Response 5-14. . . . . . . . . . .
Monitor Assembly Adjustment 5-20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Information 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures Not In This Section 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing ESD 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Precautions 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Susceptibility to ESD 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Care 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning Procedures 6-5. . . . . . . . . . . . . . . . . . . . . .
Inspection — Exterior 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Procedure — Exterior 6-6. . . . . . . . . . . . . . . . . . . . . . . . .
Inspection — Interior 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Procedure — Interior 6-8. . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v vvv
Removal and Installation Procedures 6-9. . . . . . . . . . . . . . . . . . . . . . . . .
Preparation — Please Read 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Modules 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Removal 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Instructions 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Procedures 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Access Procedure 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for Module Removal and Installation 6-21. . . . . . . . . . .
Front-Panel Knobs and Shafts 6-21. . . . . . . . . . . . . . . . . . . . . . . . . .
Line Fuse and Line Cord 6-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover, Rear Cover, Cabinet, Rear EMI Gasket,
and Cabinet Handle and Feet 6-24. . . . . . . . . . . . . . . . . . . . . . .
Trim Ring, Menu Elastomer, Menu Buttons, and Front
EMI Gaskets 6-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A06 Front-Panel Assembly, ESD Shield, and Menu Flex
and Probe Code Flex Circuits 6-31. . . . . . . . . . . . . . . . . . . . . . .
A05 Attenuator Assembly and Shield 6-34. . . . . . . . . . . . . . . . . . . .
A26 Monitor Assembly 6-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents
Options
A08 Jumper Board Assembly, D1 Bus, and Board Supports 6-40.
A03 CPU Assembly 6-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A02 Display Assembly 6-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A09 DSP Assembly 6-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A01 Backplane Assembly and its Mount 6-46. . . . . . . . . . . . . . . . . .
Back-up Batteries 6-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A25 Low Voltage Power Supply and its Mount 6-51. . . . . . . . . . . . .
Fan and Fan Mount 6-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Filter 6-56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A07 Auxiliary Power Supply 6-58. . . . . . . . . . . . . . . . . . . . . . . . . . . .
A04 Acquisition Assembly 6-60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Chassis 6-62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly for Cleaning 6-62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6-65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics 6-65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firmware Updates 6-66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Equipment 6-67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console Port Set Up 6-67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Parts List
Diagrams
Mechanical Parts List
Options and Accessories 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Electrical Parts List 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagrams 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts List 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10-2. . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 410, TDS 420 & TDS 460 Service Manual
ix
x
Contents
List of Illustrations
Figure 2-1: Power-Cord Plug Identification 2-3. . . . . . . . . . . . . . . . . . . . . .
Figure 2-2: Map of Display Functions 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-1: Map of Display Functions 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-2: Verifying Adjustments and Signal Path Compensation 4-5. .
Figure 4-3: Universal Test Hookup for Functional T ests 4-7. . . . . . . . . . .
Figure 4-4: Initial Test Hookup 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-5: Initial Test Hookup 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-6: Initial Test Hookup (TDS 410 and TDS 420) 4-23. . . . . . . . . . .
Figure 4-7: Initial Test Hookup (TDS 460) 4-23. . . . . . . . . . . . . . . . . . . . . . .
Figure 4-8: Measurement of Analog Bandwidth 4-26. . . . . . . . . . . . . . . . . .
Figure 4-9: Initial Test Hookup 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-10: Measurement of Channel Delay 4-30. . . . . . . . . . . . . . . . . . . .
Figure 4-11: Initial Test Hookup 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-12: Measurement of Accuracy — Long-Term and
Delay-Time 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-13: Initial Test Hookup 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-14: Initial Test Hookup 4-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-15: Measurement of Trigger Sensitivity 4-40. . . . . . . . . . . . . . . . .
Figure 4-16: Initial Test Hookup 4-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-17: Confirming Auxiliary Triggering at Maximum
Triggering Frequency 4-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-18: Initial Test Hookup 4-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-19: Adjusting Sync Pulse Amplitude 4-45. . . . . . . . . . . . . . . . . . . .
Figure 4-20: Measurement of Video Sensitivity 4-46. . . . . . . . . . . . . . . . . . .
Figure 4-21: Initial Test Hookup 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-22: Measurement of Probe Compensator Limits 4-49. . . . . . . . . .
TDS 410, TDS 420 & TDS 460 Service Manual
Figure 5-1: Hookup for Probe Compensation 5-9. . . . . . . . . . . . . . . . . . . .
Figure 5-2: Performing Probe Compensation 5-10. . . . . . . . . . . . . . . . . . . .
Figure 5-3: Proper and Improper Probe Compensation 5-10. . . . . . . . . . . .
Figure 5-4: Exposing the Inner Probe Tip 5-11. . . . . . . . . . . . . . . . . . . . . . . .
Figure 5-5: Initial Test Hookup (TDS 410 and TDS 420 Only) 5-12. . . . . .
Figure 5-6: Initial Test Hookup (TDS 460 Only) 5-12. . . . . . . . . . . . . . . . . . .
Figure 5-7: Exposing the Probe Body 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5-8: Initial Test Hookup (TDS 410 and TDS 420 Only) 5-15. . . . . .
Figure 5-9: Initial Test Hookup (TDS 460 Only) 5-15. . . . . . . . . . . . . . . . . . .
Figure 5-10: Probe Test Hookup (TDS 410 and TDS 420 Only) 5-17. . . .
Figure 5-11: Probe Test Hookup (TDS 460 Only) 5-17. . . . . . . . . . . . . . . . .
Figure 5-12: Locations of Probe Adjustments 5-18. . . . . . . . . . . . . . . . . . . .
xx
Figure 5-13: Adjustments vs. Front-Corner Response 5-19. . . . . . . . . . . . .
Figure 5-14: Monitor Adjustment Locations 5-21. . . . . . . . . . . . . . . . . . . . . .
Figure 5-15: Five and Ten Percent Luminance Patches 5-22. . . . . . . . . . .
Figure 5-16: Composite Pattern for Focusing 5-23. . . . . . . . . . . . . . . . . . . .
Figure 5-17: External Graticule Limit Lines 5-25. . . . . . . . . . . . . . . . . . . . . .
Figure 6-1: Oscilloscope Orientation 6-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-2: Cabinet and Front-Panel Mounted Modules 6-15. . . . . . . . . . .
Figure 6-3: Internal Modules 6-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-4: Cables and Cable Routing 6-20. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-5: Knob and Shaft Removal 6-22. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-6: Line Fuse and Line Cord Removal 6-23. . . . . . . . . . . . . . . . . . .
Figure 6-7: Front Cover, Rear Cover, Cabinet, EMI Gasket, and
Cabinet Handle and Feet Removal 6-25. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-8: Trim Ring, Menu Elastomer, and Menu Buttons
Removal 6-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-9: EMI Gasket Removal and Installation 6-30. . . . . . . . . . . . . . . .
Figure 6-10: A06 Front-Panel Assembly, ESD Shield, and Menu
Flex and Probe Code Flex Circuits Removal 6-32. . . . . . . . . . . . . . . . . .
Figure 6-1 1: Disassembly of the Front-Panel Assembly 6-33. . . . . . . . . . .
Figure 6-12: A05 Attenuator Removal 6-35. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-13: A26 Monitor Assembly Removal 6-39. . . . . . . . . . . . . . . . . . . .
Figure 6-14: A08 Jumper Board Assembly, D1 Bus, and
Board Supports Removal 6-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-15: A03 CPU Removal 6-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-16: A02 Display Assembly Removal 6-44. . . . . . . . . . . . . . . . . . . .
Figure 6-17: A09 DSP Assembly Removal 6-46. . . . . . . . . . . . . . . . . . . . . .
Figure 6-18: A01 Backplane Assembly and its Mount Removal 6-48. . . . .
Figure 6-19: Battery Removal 6-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-20: A25 Low Voltage Power Supply Removal 6-52. . . . . . . . . . . .
Figure 6-21: Fan and Fan Mount Removal 6-55. . . . . . . . . . . . . . . . . . . . . .
Figure 6-22: Line Filter Removal 6-56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-23: Auxiliary Power Supply Removal 6-59. . . . . . . . . . . . . . . . . . .
Figure 6-24: A04 Acquisition Board Removal 6-61. . . . . . . . . . . . . . . . . . . .
Figure 6-25: Accessing the Protection Switch 6-66. . . . . . . . . . . . . . . . . . . .
Figure 6-26: Console Port Connections 6-69. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-27: Primary Troubleshooting Procedure 6-70. . . . . . . . . . . . . . . . .
Figure 6-28: A03 CPU Board Connector P1 6-71. . . . . . . . . . . . . . . . . . . . .
Figure 6-29: Module Isolation Troubleshooting Procedure 6-72. . . . . . . . .
Figure 6-30: Low Voltage Power Supply Troubleshooting Procedure 6-74
Figure 6-31: Power Supply Overload Troubleshooting Procedure 6-76. . .
Figure 6-32: A25 Low Voltage Power Supply Module (Right Side) 6-77. .
Figure 6-33: Monitor Troubleshooting Procedure 6-78. . . . . . . . . . . . . . . . .
Figure 6-34: Horizontal and Vertical Sync Signals 6-79. . . . . . . . . . . . . . . .
xxx
Contents
Figure 6-35: A Video Signal with White, Black, and Blanking Levels 6-79
Figure 6-36: A26 Monitor Connector J440 6-80. . . . . . . . . . . . . . . . . . . . . . .
Figure 6-37: A07 Auxiliary Power Connectors J4 and J7 6-80. . . . . . . . . .
Figure 6-38: A02 Display Connector J2 6-81. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-39: Processor/Front Panel Troubleshooting Procedure 6-82. . . .
Figure 6-40: A06 Front Panel Board Power Connectors J101
and J106 6-83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-41: Attenuator/Acquisition Troubleshooting Procedure 6-84. . . .
Figure 6-42: A08 Jumper and A05 Attenuator Boards Signal
Locations 6-85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-43: Acquisition and Attenuator Power Troubleshooting
Procedure 6-86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-44: A04 Acquisition Board Power Connector 6-87. . . . . . . . . . . . .
Figure 6-45: Backplane Troubleshooting Procedure 6-88. . . . . . . . . . . . . .
Figure 6-46: A01 Backplane Module 6-90. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6-47: I2C Isolation Troubleshooting Procedure 6-91. . . . . . . . . . . . .
Figure 6-48: Console Troubleshooting Procedure 6-92. . . . . . . . . . . . . . . .
Figure 9-1: TDS 400 Interconnections 9-2. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9-2: TDS 400 Block Diagram 9-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10-1: External and Front Panel Modules 10-7. . . . . . . . . . . . . . . . . .
Figure 10-2: Internal Modules 10-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10-3: Cables and Routing 10-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 410, TDS 420 & TDS 460 Service Manual
x xxx
xx
Contents
List of Tables
Table 1-1: Record Length vs. Divisions per Record 1-3. . . . . . . . . . . . . . .
Table 1-2: Nominal Traits — Signal Acquisition System 1-7. . . . . . . . . . .
Table 1-3: Nominal Traits — Time Base System 1-8. . . . . . . . . . . . . . . . .
Table 1-4: Nominal Traits — Triggering System 1-9. . . . . . . . . . . . . . . . . .
Table 1-5: Nominal Traits — Display System 1-9. . . . . . . . . . . . . . . . . . . .
Table 1-6: Nominal Traits — Data Storage 1-9. . . . . . . . . . . . . . . . . . . . . .
Table 1-7: Nominal Traits — GPIB Interface, Video Output, and
Power Fuse 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-8: Nominal Traits — Mechanical 1-10. . . . . . . . . . . . . . . . . . . . . . . .
Table 1-9: Warranted Characteristics — Signal Acquisition System 1-12.
Table 1-10: Warranted Characteristics — Time Base System 1-14. . . . . .
Table 1-11: Warranted Characteristics — Triggering System 1-15. . . . . .
Table 1-12: Warranted Characteristics — Probe Compensator
Output 1-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-13: Power Requirements 1-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-14: Warranted Characteristics — Environmental, Safety,
and Reliability 1-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1-15: Typical Characteristics — Signal Acquisition System 1-18. .
Table 1-16: Typical Characteristics — Time Base System 1-19. . . . . . . . .
Table 1-17: Typical Characteristics — Triggering System 1-19. . . . . . . . .
Table 1-18: Typical Characteristics — Data Handling 1-20. . . . . . . . . . . . .
Table 2-1: Power Cord Conductor Identification 2-2. . . . . . . . . . . . . . . . . .
Table 2-2: Effects of Corrupted Data 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4-1: Test Equipment 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4-2: DC Offset Accuracy 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4-3: Analog Bandwidth (TDS 410 and TDS 420) 4-25. . . . . . . . . . . .
Table 4-4: Analog Bandwidth (TDS 460) 4-25. . . . . . . . . . . . . . . . . . . . . . . .
Table 5-1: Adjustments Required for Module Replaced 5-3. . . . . . . . . . .
Table 5-2: Adjustments and Dependencies 5-4. . . . . . . . . . . . . . . . . . . . .
Table 5-3: Test Equipment, Fixtures, and Supplies 5-5. . . . . . . . . . . . . . .
Table 5-4: GPIB Board Configuration 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6-1: Relative Susceptibility to Static-Discharge Damage 6-3. . . . .
Table 6-2: External Inspection Check List 6-6. . . . . . . . . . . . . . . . . . . . . . .
Table 6-3: Internal Inspection Check List 6-7. . . . . . . . . . . . . . . . . . . . . . .
Table 6-4: Tools Required for Module Removal 6-12. . . . . . . . . . . . . . . . . .
Table 6-5: Access Instructions for Modules in Figure 6-2 6-14. . . . . . . . . .
Table 6-6: Access Instructions for Modules in Figure 6-3 6-16. . . . . . . . . .
Table 6-7: Access (and Removal) Instructions for Cables
in Figure 6-4 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 410, TDS 420 & TDS 460 Service Manual
xx
Table 6-8: Troubleshooting Test Equipment, Fixtures, and Supplies 6-67
Table 6-9: Connections for a 9 to 25 Pin Null Modem Cable 6-68. . . . . . .
Table 6-10: Diagnostic Failure Priority List 6-73. . . . . . . . . . . . . . . . . . . . . .
Table 6-11: Normal Output Voltage 6-75. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6-12: Power Supply Maximum Current 6-77. . . . . . . . . . . . . . . . . . . .
Table 6-13: Front Panel Connector Voltages 6-83. . . . . . . . . . . . . . . . . . . .
Table 6-14: Channel and P1 Signal Locations 6-85. . . . . . . . . . . . . . . . . . .
Table 6-15: A05 Attenuator Board Power 6-86. . . . . . . . . . . . . . . . . . . . . . .
Table 6-16: A04 Acquisition Board Power 6-86. . . . . . . . . . . . . . . . . . . . . . .
Table 6-17: Regulator Voltages 6-89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6-18: J7 Voltages 6-89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6-19: J8 Front Panel Voltages 6-89. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-1: International Power Cords 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-2: Standard Accessories 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-3: Probe Accessories 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-4: Optional Accessories 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-5: Probe Accessories 7-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7-6: Accessory Software 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xx
Contents
Service Safety Summary
Please take a moment to review these safety precautions. They are provided
for your protection and to prevent damage to the digitizing oscilloscope. This
safety information applies to all operators and service personnel.
Symbols and Terms
These two terms appear in manuals:
H
statements identify conditions or practices that could result in
damage to the equipment or other property.
H
statements identify conditions or practices that could result in
personal injury or loss of life.
These two terms appear on equipment:
H
CAUTION
indicates a personal injury hazard not immediately accessible
as one reads the marking, or a hazard to property including the equipment
itself.
H
DANGER
indicates a personal injury hazard immediately accessible as
one reads the marking.
This symbol appears in manuals:
Static-Sensitive Devices
TDS 410, TDS 420 & TDS 460 Technical Reference Manual
These symbols appear on equipment:
DANGER
High Voltage
Protective
ground (earth)
terminal
ATTENTION
Refer to
manual
xxx
Specific Precautions
Observe all of the following precautions to ensure your personal safety and to
prevent damage to either the digitizing oscilloscope or the equipment connected to it.
Do Not Perform Service While Alone
Do not perform internal service or adjustment of this product unless another
person capable of rendering first aid and resuscitation is present.
Use Care When Servicing With Power On
Dangerous voltages exist at several points in this product. To avoid personal
injury, do not touch exposed connections or components while power is on.
Disconnect power before removing protective panels, soldering, or replacing
components.
Power Source
The digitizing oscilloscope is intended to operate from a power source that will
not apply more than 250 V
either supply conductor and ground. A protective ground connection, through
the grounding conductor in the power cord, is essential for safe system operation.
between the supply conductors or between
RMS
Grounding the Digitizing Oscilloscope
The digitizing oscilloscope is grounded through the power cord. To avoid
electric shock, plug the power cord into a properly wired receptacle where
earth ground has been verified by a qualified service person. Do this before
making connections to the input or output terminals of the digitizing oscilloscope.
Without the protective ground connection, all parts of the digitizing oscilloscope are potential shock hazards. This includes knobs and controls that may
appear to be insulators.
Use the Proper Power Cord
Use only the power cord and connector specified for your product. Use only a
power cord that is in good condition.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified in the parts list for your product, and which is identical in type, voltage rating, and current rating.
x xxx
Safety Summary
Do Not Remove Covers or Panels
To avoid personal injury, do not operate the digitizing oscilloscope without the
panels or covers.
Do Not Operate in Explosive Atmospheres
The digitizing oscilloscope provides no explosion protection from static discharges or arcing components. Do not operate the digitizing oscilloscope in an
atmosphere of explosive gasses.
Electric Overload
Never apply a voltage to a connector on the digitizing oscilloscope that is
outside the range specified for that connector.
TDS 410, TDS 420 & TDS 460 Technical Reference Manual
xx
xx
Safety Summary
Preface
This service manual provides service information for the TDS 410, TDS 420,
and TDS 460 Digitizing Oscilloscopes.
If servicing a TDS 410, follow the procedures for the TDS 420, but
ignore all references to CH 3 and CH 4.
Manual Structure
This manual is divided into sections, such as
Operation
and
Sections containing procedures also contain introductions to those proce-
dures. Be sure to read these introductions, because they provide information
needed to do the service correctly and efficiently. The following is a brief
description of each manual section.
H
H
H
H
. Further, it is divided into subsections, such as
Removal and Installation Procedures.
Specifications
scope and tables of the characteristics and descriptions that apply to it.
Operating Information
this manual is structured, as well as general information and operating
instructions at the level needed to safely power up and service this oscilloscope. A statement of the service strategy that this manual supports, as
well as instructions for shipment of the digitizing oscilloscope, are found in
this section.
Theory of Operation
service and fault isolation.
Performance Verification
firming that this digitizing oscilloscope functions properly and meets
warranted limits.
— contains a product description of the digitizing oscillo-
— is this section. It includes a description of how
— contains circuit descriptions that support general
— contains a collection of procedures for con-
Specifications and Theory of
Product Description
TDS 410, TDS 420 & TDS 460 Technical Reference
Adjustment Procedures
H
ing this digitizing oscilloscope to meet warranted limits.
Maintenance
H
and corrective maintenance of the digitizing oscilloscope. Instructions for
cleaning, for module removal and installation, and for fault isolation to a
module are found here.
Options
H
options that may be present in your oscilloscope.
Electrical Parts List
H
cal Parts List,
See below
H
Diagrams
useful for isolating failed modules.
— contains information and procedures for doing preventive
— contains information on servicing any of the factory-installed
where both electrical and mechanical modules are listed.
.
— contains a block diagram and an interconnection diagram
— contains a collection of procedures for adjust-
— contains a statement referring you to the
Mechani-
xx
H
Mechanical Parts List
descriptions, and their Tektronix part numbers
— includes a table of all replaceable modules, their
.
Manual Conventions
This manual uses certain conventions which you should become familiar with
before doing service.
Modules
Throughout this manual, any replaceable component, assembly, or part of this
digitizing oscilloscope is referred to generically as a module. In general, a
module is an assembly, like a circuit board, rather than a component, like a
resistor or an integrated circuit. Sometimes a single component is a module;
for example, the chassis of the oscilloscope is a module.
Safety
Symbols and terms related to safety appear in the Safety Summary found at
the beginning of this manual.
Symbols
Besides the symbols related to safety, this manual uses the following symbols:
The “stop sign” icon labels information which must be read in order to
correctly do service and to avoid incorrectly using or applying service
procedures.
Related Manuals
The clock icon labels procedure steps which require a pause to wait
for the oscilloscope to complete some operation before you can
continue.
Various icons such as the example icon at the left are used in procedures to help identify certain readouts and menu functions on screen.
These other manuals are available for the TDS 410, TDS 420, and TDS 460
Digitizing Oscilloscopes.
H
H
H
Reference
The
scope.
User
The
Programmer Manual
The
and remote control of the oscilloscope through the GPIB.
gives you a quick overview of how to operate your oscillo-
provides instructions on how to operate your oscilloscope.
provides complete information on programming
xxx
Preface
Introduction
This section contains general information critical to safe and effective servicing of this oscilloscope, the manual service strategy, and a description of
repair and warranty services available from Tektronix.
Before Servicing
Strategy for
Servicing
This manual is for servicing the TDS 410, TDS 420, & TDS 460 Digitizing
Oscilloscopes. To prevent injury to yourself or damage to the oscilloscope, do
the following before you attempt service:
H
Be sure you are a qualified service person;
H
Read the Safety Summary found at the beginning of this manual;
H
When using this manual for servicing, be sure to heed all warnings, cautions,
and notes.
This manual contains all the information needed for periodic maintenance of
your oscilloscope. (Examples of such information are procedures for checking
performance and for readjustment.) Further, it contains all information for
corrective maintenance down to the module level. This means that the procedures, diagrams, and other troubleshooting aids help isolate failures to a
specific module, rather than to components of that module. Once a failure is
isolated, replace the module with a fully tested module obtained from the
factory.
Strategy for Servicing
Read
tion.
If servicing a TDS 410, follow the procedures for the TDS 420, but
ignore all references to CH 3 and CH 4.
Throughout this manual, any field-replaceable component, assembly,
or part of this oscilloscope is referred to generically as a module.
and
Supplying Operating Power
in this sec-
TDS 410, TDS 420 & TDS 460 Service Manual
All modules are listed in Section 10,
to a module, use the fault isolation procedures found in Section 6,
nance.
Removal and Installation Procedures
To remove and replace any failed module, follow the instructions in
Mechanical Parts List.
, also found in Section 6.
To isolate a failure
Mainte-
x xxx
Tektronix Service
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, trained on Tektronix products, are best
equipped to service your digitizing oscilloscope. Tektronix technicians are
appraised of the latest information on improvements to the product as well as
the latest new options to the product.
Warranty Repair Service
Tektronix warrants this product for three years from date of purchase, excluding probes for which the warranty is one year. (The warranty appears on the
back of the title page in this manual.) Tektronix technicians provide warranty
service at most Tektronix service locations worldwide. Your Tektronix product
catalog lists all service locations worldwide.
Repair or Calibration Service
The following services may be purchased to tailor repair and/or calibration of
your digitizing oscilloscope to fit your requirements.
Option 9C — When you order your digitizing oscilloscope with option 9C, it
is shipped with a
provides traceability to the National Institute of Standards and Technology
(NIST). It certifies procedures used to calibrate the oscilloscope comply with
U. S. Military Standard 45662A.
Certificate of Calibration and Test Data.
This certificate
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 oscilloscope.
Of these services, the annual maintenance agreement offers a particularly
cost-effective approach to service for many owners of the TDS 420 &
TDS 460 Digitizing Oscilloscopes. Such agreements can be purchased to
span several years.
On-Site Service — The annual maintenance agreement can be purchased
with on-site service, with repair and calibration done at your facility. This
service reduces the time your oscilloscope is out of service when calibration
or repair is required.
xx
Introduction
Self Service
Tektronix supports repair to the module level by providing
and
Module Repair and Return
.
Module Exchange
Module Exchange — This service reduces down time for repair by allowing
you to exchange most modules for remanufactured ones. Tektronix ships you
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.
Module Repair and Return — This service returns to you within 10 days
the same module that you shipped to Tektronix. The module shipped is repaired, tested, and returned to you from the Beaverton, Oregon service
not
center. It is
each module comes with a 90-day service warranty.
updated to match current modules of the same type. Again,
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.
TDS 410, TDS 420 & TDS 460 Service Manual
xx
xx
Introduction
Specifications
Product Description
This subsection begins with a general description of the traits of the
TDS 400 Digitizing Oscilloscopes. Three subsections follow, one for each of
three classes of traits:
characteristics
.
nominal traits, warranted characteristics,
and
typical
General
Tektronix TDS 400 Digitizing Oscilloscopes are portable instruments suitable
for use in a variety of test and measurement applications and systems. Key
features include:
H
Four input channels on the TDS 420 and TDS 460 (two input channels on
the TDS 410), each with a record length of 500 to 15,000 points and 8-bit
vertical resolution. (Option 1M extends the maximum record length to
60,000 points.)
H
Simultaneous acquisition of waveforms in all channels at the maximum
digitizing rate of 100 Megasamples/second. All channels acquire at the
full analog bandwidth of 150 MHz (TDS 410 and TDS 420) or 350 MHz
(TDS 460) and all have the same features.
H
Video triggering capabilities (with Option 5, Video Trigger).
H
Full programmability and printer/plotter output.
H
Advanced functions, such as continuously updated measurements.
H
Specialized display modes, such as infinite and variable persistence.
H
A unique graphical user interface (GUI), an on-board help mode, and a
logical front-panel layout which combine to deliver a new standard in
usability.
H
Advanced waveform math (with Option 2F, Advanced DSP Math). Compute and display the integral of a waveform, the differential of a waveform, and the FFT (Fast Fourier Transform) of a waveform.
User Interface
TDS 410, TDS 420 & TDS 460 Technical Reference Manual
This digitizing oscilloscope uses a combination of front-panel buttons, knobs,
and on-screen menus to control its many functions. The front-panel controls
are grouped according to function: vertical, horizontal, trigger, and special.
Within each group, any function likely to get adjusted often, such as vertical
positioning or the time base setting, is set directly by its own front-panel knob.
1Ć1
Product Description
Menus
Those functions for which control settings are usually changed less often,
such as vertical coupling and horizontal mode, are set indirectly. That is,
pressing one (sometimes two) front-panel button, such as vertical menu,
displays a menu of functions at the bottom of the screen that are related to
that button. (For the button vertical menu, the menu displayed contains
functions such as coupling and bandwidth.) Using the buttons below this
menu to select a function, such as coupling, displays a
for that function, such as AC, DC, or GND (ground) coupling, at the right side
of the screen. Use the buttons to the right of the menu to select a setting,
such as DC.
side
menu of settings
main
Indicators
Several on-screen readouts help you keep track of the settings for various
functions, such as vertical and horizontal scale and trigger level. There are
also readouts to display the results of measurements made using cursors or
using the automatic parameter extraction feature (called measure) and readouts to display the status of the instrument.
Signal Acquisition
System
General Purpose Knob
Menus can also be used to assign the general purpose knob to adjust a
selected parameter function. The method employed is the same as for
a function, except the final selection in the side menu causes the general
ing
adjust
purpose knob to
cursors on screen, or the setting for the fine gain of a channel.
some function, such as the position of measurement
select-
GUI
The user interface also makes use of a GUI, or Graphical User Interface, to
make setting functions and interpreting the display more intuitive. Some
menus and status are displayed using iconic representations of function
settings such as those shown here for full, 100 MHz, and 20 MHz bandwidth.
Such icons allow you to more readily determine status or the available settings.
The signal acquisition system provides vertical channels with calibrated
vertical scale factors from 1 mV to 10 V per division. All input channels can be
acquired simultaneously .
You can display, vertically position, and offset each input channel. You can
also limit their bandwidth (to either 100 MHz or 20 MHz), specify their vertical
coupling, and adjust their fine gain.
1Ć2
Specifications
Product Description
Besides the input channels, up to three math waveforms and four reference
waveforms are available for display. (A math waveform results when you
specify operations, such as add or invert; a reference waveform results when
you save a live waveform in a reference memory.)
Horizontal System
There are three horizontal display modes: main only, main intensified, and
delayed only. Y ou can select among various horizontal record length settings
(see Table 1-1).
Table 1-1: Record Length vs. Divisions per Record
Record Length
1, 2
Divisions per Record
(50 Points/Division)
60,000 1200 divs
30,000 600 divs
15,000 300 divs
5,000 100 divs
2,500 50 divs
1,000 20 divs
500 10 divs
1
The 30,000 and 60,000 point record lengths are available only with Option 1M.
2
The maximum record length of 60,000 points for oscilloscopes equipped with Option 1M
reduces to 15,000 points when operating in Hi Res or Average acquisition mode.
Both the delayed only display and the intensified zone on the main intensified
display can be delayed by time with respect to the main trigger. Both can be
set to display immediately after the delay (delayed runs after main mode); the
delayed display can also be set to display at the first valid trigger after the
delay (delayed triggerable mode).
The delayed display (or the intensified zone) can also be delayed by a selected number of events. In such a case, the events source is the delayed
trigger source. For any events signal, the delayed-trigger system conditions
the signal by determining the source, coupling, etc., of that signal.
At time base settings of 20 ms per division or slower the records are displayed using Roll mode. Both untriggered roll and triggered roll modes are
available.
TDS 410, TDS 420 & TDS 460 Technical Reference Manual
1Ć3
Product Description
Trigger System
Acquisition Control
The triggering system comprises a complete set of features for triggering the
signal-acquisition system. In edge trigger mode, you can select the source,
slope, coupling, mode (auto or normal), and holdoff.
Oscilloscopes ordered with Option 5 also have the video trigger mode. This
trigger mode allows triggering on NTSC-standard, PAL-standard, SECAMstandard, or custom video waveforms. You can configure the triggering for
interlaced or non-interlaced scanning, different scan rates, field selection, line
selection, and for delay by line or time.
You can choose where the trigger point is located within the acquired waveform record by selecting the amount of pretrigger data displayed. Presets of
10%, 50%, and 90% of pretrigger data can be selected in the horizontal
menu, or the General Purpose knob can be assigned to set pretrigger data to
any value within the limits of trigger position resolution.
Depending on your measurement requirements, you can specify the mode
and manner in which signals are acquired and processed:
H
You can select equivalent-time sampling on repetitive signals or interpolation of points sampled on non-repetitive signals. Both can increase the
apparent sample rate on the waveform when maximum real-time rates
are reached.
On-Board User
Assistance
H
Peak-detect, high-resolution, sample, envelope, and average modes can
be used to acquire signals.
H
The acquisition can be set to stop after a single acquisition (or sequence
of acquisitions if acquiring in average or envelope modes).
Two features that help you set up this digitizing oscilloscope to make your
measurements are help and autoset.
Help
Help displays operational information about any front-panel control. When
help mode is in effect, manipulating any front-panel control causes the digitizing oscilloscope to display information about that control. When help is first
invoked, an introduction to help is displayed on screen.
Autoset
Autoset automatically sets up the digitizing oscilloscope for a viewable display
based on the input signal.
1Ć4
Specifications
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