Tektronix TDS 510A Service Manual

Service Manual

TDS 510A Digitizing Oscilloscope

070-9704-02

Warning

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

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 PARTICULAR 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.

Service Assurance

If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs.

Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three years of Repair Protection.

Calibration Services provide annual calibration of your product, standards compliance and required audit documentation, recall assurance, and reminder notification of scheduled calibration. Coverage begins upon registration; you may purchase up to five years of Calibration Services.

Service Assurance Advantages

H Priced well below the cost of a single repair or calibration H Avoid delays for service by eliminating the need for separate purchase authorizations from your company H Eliminates unexpected service expenses

For Information and Ordering

For more information or to order Service Assurance, contact your T ektronix representative and provide the information below . Service Assurance may not be available in locations outside the United States of America.

Name VISA or Master Card number and expiration Company date or purchase order number Address Repair Protection (1,2, or 3 years) City , State, Postal code Calibration Services (1,2,3,4, or 5 years) Country Instrument model and serial number Phone Instrument purchase date

Specifications

Operating Information

General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

User Interface 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Signal Acquisition System 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal System 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trigger System 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquisition Control 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

On-Board User Assistance 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurement Assistance 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage and I/O 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Nominal Traits 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranted Characteristics 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Typical Characteristics 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory of Operation

Using This Manual 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Before Servicing 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategy for Servicing 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Structure 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Conventions 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ektronix Service 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Finding Other Information 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Information 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supplying Operating Power 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Environment 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Applying and Interrupting Power 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repackaging Instructions 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installed Options 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Operating Instructions 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Screen Layout 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic Procedures 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Circuit Description 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Logic Conventions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Module Overview 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TDS 510A Service Manual

Table of Contents

Performance Verification

Performance Verification Procedures 4–1. . . . . . . . . . . . . . . . . . . . . . . . . .

Conventions 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brief Procedures 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self Tests 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional T ests 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Tests 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prerequisites 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TDS 510A T est Record 4–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Signal Acquisition System Checks 4–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Base System Checks 4–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trigger System Checks 4–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Signal Checks 4–58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 05 Video Trigger Checks 4–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sine Wave Generator Leveling Procedure 4–84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Procedures

Maintenance

Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Requirements for Performance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Usage 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 5–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Instructions 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Adjustment for the P6139A Probe 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Assembly Adjustment 5–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance Information 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures Not In This Section 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preventing Electrostatic Discharge (ESD) 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection and Cleaning 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Care 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection and Cleaning Procedures 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal and Installation Procedures 6–9. . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation — Please Read 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Access Procedure 6–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for External Modules 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for Outer-Chassis Modules 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for Inner-Chassis Modules 6–50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembly for Cleaning 6–58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6–61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 6–61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Firmware Updates 6–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

Options and Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TDS 510A Service Manual

Electrical Parts List

Diagrams

Mechanical Parts List

Table of Contents

Replaceable Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Symbols 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Parts 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

TDS 510A Service Manual

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Table of Contents

List of Figures

Figure 2–1: Power-Cord Plug Identification 2–9. . . . . . . . . . . . . . . . . . . .

Figure 2–2: Map of Display Functions 2–14. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–1: Map of Display Functions 4–3. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–2: Verifying Adjustments and Signal-Path Compensation 4–6.

Figure 4–3: Universal Test Hookup for Functional Tests 4–8. . . . . . . . . .

Figure 4–4: Measurement of DC Offset Accuracy at Zero Setting 4–29. . .

Figure 4–5: Initial Test Hookup 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–6: Measurement of DC Accuracy at Maximum Offset

and Position 4–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–7: Initial Test Hookup 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–8: Optional Initial Test Hookup 4–34. . . . . . . . . . . . . . . . . . . . . . .

Figure 4–9: Measurement of Analog Bandwidth 4–37. . . . . . . . . . . . . . . . .

Figure 4–10: Initial Test Hookup 4–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–11: Measurement of Channel Delay 4–41. . . . . . . . . . . . . . . . . . . .

Figure 4–12: Initial Test Hookup 4–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–13: Measurement of Accuracy — Long-Term and

Delay Time 4–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–14: Initial Test Hookup 4–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–15: Measurement of Time Accuracy for Pulse and

Glitch Triggering 4–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–16: Initial Test Hookup 4–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–17: Measurement of Trigger-Level Accuracy 4–51. . . . . . . . . . . .

Figure 4–18: Initial Test Hookup 4–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–19: Measurement of Trigger Sensitivity — 50 MHz

Results Shown 4–55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–20: Initial Test Hookup 4–58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–21: Measurement of Main Trigger Out Limits 4–60. . . . . . . . . . .

Figure 4–22: Initial Test Hookup 4–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–23: Measurement of Probe Compensator Frequency 4–64. . . . .

Figure 4–24: Subsequent Test Hookup 4–65. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–25: Measurement of Probe Compensator Amplitude 4–66. . . . .

Figure 4–26: Jitter Test Hookup 4–68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–27: Jitter Test Displayed Waveform 4–69. . . . . . . . . . . . . . . . . . .

Figure 4–28: Jitter Test When Completed 4–70. . . . . . . . . . . . . . . . . . . . . .

Figure 4–29: Triggered Signal Range Test – 300 mV 4–72. . . . . . . . . . . . . .

TDS 510A Service Manual

Table of Contents

Figure 4–30: Triggered Signal Range Test – 75 mV 4–73. . . . . . . . . . . . . . .

Figure 4–31: 60 Hz Rejection Test Hookup 4–74. . . . . . . . . . . . . . . . . . . . . .

Figure 4–32: 60 Hz Rejection Test Setup Signal 4–74. . . . . . . . . . . . . . . . . .

Figure 4–33: Subsequent 60 Hz Rejection Test Hookup 4–75. . . . . . . . . . .

Figure 4–34: 60 Hz Rejection Test Result 4–76. . . . . . . . . . . . . . . . . . . . . . .

Figure 4–35: Line Count Accuracy Test Hookup 4–77. . . . . . . . . . . . . . . . .

Figure 4–36: Line Count Accuracy Test Setup Waveform 4–78. . . . . . . . .

Figure 4–37: Line Count Accuracy Correct Result Waveform 4–79. . . . . .

Figure 4–38: Setup for Sync Duty Cycle Test 4–81. . . . . . . . . . . . . . . . . . . .

Figure 4–39: Sync Duty Cycle Test: One-Div Neg Pulse Waveform 4–82. .

Figure 4–40: Sync Duty Cycle Test: Critically Adjusted Pulse 4–83. . . . . .

Figure 4–41: Sine Wave Generator Leveling Equipment Setup 4–85. . . . .

Figure 4–42: Equipment Setup for Maximum Amplitude 4–86. . . . . . . . .

Figure 5–1: Accessing the Protection Switch 5–9. . . . . . . . . . . . . . . . . . . .

Figure 5–2: Hookup for Probe Compensation 5–10. . . . . . . . . . . . . . . . . . .

Figure 5–3: Performing Probe Compensation 5–11. . . . . . . . . . . . . . . . . . .

Figure 5–4: Proper and Improper Probe Compensation 5–12. . . . . . . . . . .

Figure 5–5: Exposing the Inner Probe Tip 5–13. . . . . . . . . . . . . . . . . . . . . .

Figure 5–6: Initial Test Hookup 5–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–7: Exposing the Probe Body 5–16. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–8: Initial Test Hookup 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 5–9: Locations of P6139A Probe Adjustments 5–18. . . . . . . . . . . . .

Figure 5–10: Adjustments versus Front-Corner Response 5–19. . . . . . . . .

Figure 5–11: Five and Ten Percent Luminance Patches 5–21. . . . . . . . . . .

TDS 510A Service Manual

Figure 6–1: External Modules 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–2: Outer-Chassis Modules 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–3: Inner-Chassis Modules 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–5: Knob Removal 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–6: Line Fuse and Line Cord Removal 6–19. . . . . . . . . . . . . . . . . .

Figure 6–7: Rear Cover and Cabinet Removal 6–22. . . . . . . . . . . . . . . . . .

Figure 6–8: Front Cover, Trim Ring, Menu Buttons, and Attenuator

Panel Removal (Front Cover not Shown) 6–23. . . . . . . . . . . . . . . . . . . .

Figure 6–9: A12 Front-Panel Assembly 6–25. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–10: Disassembly of Front-Panel Assembly 6–26. . . . . . . . . . . . . .

Figure 6–11: Cabinet Modules Removal 6–29. . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–12: Attenuator Interconnect Cable Routing and

Jack Locations 6–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Figure 6–13: A14 D1 Bus and Power Cables Removal 6–33. . . . . . . . . . . .

Figure 6–14: Remove Circuit Board Assembly From Oscilloscope 6–34. .

Figure 6–15: Remove Circuit Board From Assembly 6–35. . . . . . . . . . . . .

Figure 6–16: Circuit Board Installed 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–17: Proper Routing of the Video Cable 6–38. . . . . . . . . . . . . . . . .

Figure 6–18: Circuit Board Removal 6–39. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–19: A11 Processor/Display Removal 6–41. . . . . . . . . . . . . . . . . . .

Figure 6–20: Board Bracket Removal 6–42. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–21: A11 Processor/Display Removal 6–45. . . . . . . . . . . . . . . . . . .

Figure 6–22: Floppy Disk Removal 6–47. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–23: Rear Chassis Removal 6–49. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–24: A16 Low Voltage Power Supply Removal 6–51. . . . . . . . . . .

Figure 6–26: Display Assembly Removal 6–54. . . . . . . . . . . . . . . . . . . . . . .

Figure 6–27: Display-Driver Board Removal 6–55. . . . . . . . . . . . . . . . . . . .

Figure 6–28: Front Subpanel Removal 6–57. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–29: Accessing the Protection Switch 6–62. . . . . . . . . . . . . . . . . . .

Figure 6–30: Primary Troubleshooting Procedure 6–63. . . . . . . . . . . . . . .

Figure 6–31: Module Isolation Troubleshooting Procedure 6–64. . . . . . . .

Figure 6–32: A16 Low Voltage Power Supply Module Isolation

Troubleshooting Procedure 6–65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–33: Power Supply Voltage Measurement Locations 6–66. . . . . . .

Figure 6–34: Display Troubleshooting Procedure 6–67. . . . . . . . . . . . . . . .

Figure 6–35: Horizontal and Vertical Sync Signals 6–68. . . . . . . . . . . . . . .

Figure 6–36: A Video Signal with White, Black, and Blanking Levels 6–68

Figure 6–37: Processor/Acquisition Troubleshooting Procedure 6–69. . . .

Figure 6–38: Processor/Front Panel Troubleshooting Procedure 6–70. . . .

Figure 6–39: Attenuator/Acquisition Troubleshooting Procedure 6–71. . Figure 6–40: A11 DRAM Processor/Display Module (View

of Right Side) 6–72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–41: A11 DRAM Processor/Display Module (View of

Lower Left Corner) 6–73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9–1: Interconnections 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9–2: Block Diagram 9–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–1: Cabinet and Front Panel 10–5. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–2: Outer-Chassis Modules 10–7. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–3: Inner-Chassis Modules – A30 Display Shown 10–8. . . . . . . .

Figure 10–4: Cables 10–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–5: Floppy Disk 10–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TDS 510A Service Manual

List of Tables

Table of Contents

Table 1–1: Record Length vs. Divisions per Record, Samples Per

Division, and Sec/Div Sequence 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–2: Nominal Traits — Signal Acquisition System 1–9. . . . . . . . . .

Table 1–3: Nominal Traits — Time Base System 1–10. . . . . . . . . . . . . . . .

Table 1–4: Nominal Traits — Triggering System 1–11. . . . . . . . . . . . . . . .

Table 1–5: Nominal Traits — Display System 1–11. . . . . . . . . . . . . . . . . . .

Table 1–6: Nominal Traits — Interfaces, Output Ports, and

Power Fuse 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–7: Nominal Traits — Mechanical 1–12. . . . . . . . . . . . . . . . . . . . . .

Table 1–8: Warranted Characteristics — Signal Acquisition System 1–15

Table 1–9: Warranted Characteristics — Time Base System 1–16. . . . . .

Table 1–10: Warranted Characteristics — Triggering System 1–17. . . . .

Table 1–11: Warranted Characteristics — Interfaces, Output Ports

and Power Requirements 1–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–12: Warranted Characteristics — Environmental, Safety,

and Reliability 1–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–13: Typical Characteristics — Signal Acquisition System 1–19. .

Table 1–14: Typical Characteristics — Time Base System 1–20. . . . . . . . .

Table 1–15: Typical Characteristics — Triggering System 1–20. . . . . . . .

Table 1–16: Typical Characteristics — Data Handling 1–22. . . . . . . . . . . .

Table 1–17: Certifications and compliances 1–23. . . . . . . . . . . . . . . . . . . . .

TDS 510A Service Manual

Table 2–1: Power-Cord Conductor Identification 2–8. . . . . . . . . . . . . . . .

Table 2–2: Effects of Corrupted Data 2–11. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–1: Test Equipment 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–2: DC Offset Accuracy (Zero Setting) 4–28. . . . . . . . . . . . . . . . . .

Table 4–3: DC Voltage Measurement Accuracy 4–31. . . . . . . . . . . . . . . . .

Table 4–4: Analog Bandwidth 4–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–5: Delay Between Channels Worksheet 4–42. . . . . . . . . . . . . . . . .

Table 5–1: Calibration Tests 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 5–2: Adjustments Required for Module Replaced 5–4. . . . . . . . . .

Table 5–3: Adjustments and Dependencies 5–4. . . . . . . . . . . . . . . . . . . . .

Table 5–4: Test Equipment, Fixtures, and Supplies 5–5. . . . . . . . . . . . . .

Table 5–5: GPIB Board Configuration1 5–7. . . . . . . . . . . . . . . . . . . . . . . .

vii

Table of Contents

Table 6–1: Relative Susceptibility to Static-Discharge Damage 6–2. . . . .

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 6–11. . . . . . . . . . . . . . . . .

Table 6–5: Normal Supply Voltages (Measured on J26 and J27 on

the A11 DRAM Processor/Display Module) 6–66. . . . . . . . . . . . . . . . .

Table 6–6: No-Load Supply Voltages (Measured on J5 and J6 on the

A17 Main LV Power Supply Module) 6–66. . . . . . . . . . . . . . . . . . . . . .

Table 7–1: International Power Cords 7–1. . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–2: Standard Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–3: Probe Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–4: Optional Accessories 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–5: Probe Accessories 7–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–6: Accessory Software 7–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–7: 7–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TDS 510A Service Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.

To avoid potential hazards, use this product only as specified.

Only qualified personnel should perform service procedures.

Injury Precautions

Use Proper Power Cord. To avoid fire hazard, use only the power cord specified

for this product. 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 grounded through the grounding conductor

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

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.

Product Damage

Precautions

TDS 510A Service Manual

Use Proper Power Source. Do not operate this product from a power source that applies more than the voltage specified.

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.

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:

DANGER

High Voltage

Protective Ground

(Earth) T erminal

ATTENTION

Refer to Manual

Double

Insulated

TDS 510A 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 Caution When Servicing the CRT. To avoid electric shock or injury, use extreme caution when handling the CRT. Only qualified personnel familiar with CRT servicing procedures and precautions should remove or install the CRT.

CRTs retain hazardous voltages for long periods of time after power is turned off. Before attempting any servicing, discharge the CRT by shorting the anode to chassis ground. When discharging the CRT, connect the discharge path to ground and then the anode. Rough handling may cause the CRT to implode. Do not nick or scratch the glass or subject it to undue pressure when removing or installing it. When handling the CRT, wear safety goggles and heavy gloves for protection.

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. X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the

high-voltage circuitry or the CRT enclosure. X-ray emissions generated within this product have been sufficiently shielded.

TDS 510A Service Manual

Service Safety Summary

xii

TDS 510A Service Manual

Preface

Manual Structure

This preface contains information needed to properly use this manual to service the TDS 510A Digitizing Oscilloscope, as well as general information critical to safe and effective servicing of this oscilloscope.

This manual is divided into sections, such as Specification and Theory of Operation. Further, it is divided into subsections, such as Product Description and Removal and Installation Procedures.

Sections containing procedures also contain introductions to those procedures. 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 Specification contains a product description of the TDS 510A Digitizing

Oscilloscope and tables of the characteristics and descriptions that apply to

it. H Operating Information includes general information and operating instruc-

tions at the level needed to safely power on and service this oscilloscope. A

statement of the service strategy that this manual supports, and instructions

for shipment of the oscilloscope are found in this section. H Theory of Operation contains circuit descriptions that support general service

and fault isolation. H Performance Verification contains a collection of procedures for confirming

that this oscilloscope functions properly and meets warranted limits. H Adjustment Procedures contains a collection of procedures for adjusting this

oscilloscope to meet warranted limits. H Maintenance contains information and procedures for doing preventive and

corrective maintenance of this oscilloscope. Instructions for cleaning, for

module removal and installation, and for fault isolation to a module are

found here. H Options contains information on servicing any of the factory-installed

options that may be present in your oscilloscope.

H Electrical Parts List contains a statement referring you to Mechanical

Replaceable Parts, where both electrical and mechanical modules are listed.

TDS 510A Service Manual

xiii

Preface

Manual Conventions

H Diagrams contains a block diagram and an interconnection diagram useful

for isolating failed modules.

H Mechanical Parts List includes a table of all replaceable modules, their

descriptions, and their Tektronix part numbers.

This manual uses certain conventions which you should become familiar with before doing service.

Modules

Safety

Symbols

Throughout this manual, any replaceable component, assembly, or part of these 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, each chassis part of the oscilloscope is a module.

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

Besides the symbols related to safety, this manual uses the following symbols:

STOP. The stop labels information which must be read in order to correctly do service and to avoid incorrectly using or applying service procedures.

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.

Related Manuals

xiv

The TDS 510A Digitizing Oscilloscope comes with the following manuals: TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual contains a tutorial

to quickly show you how to operate the TDS 510A Digitizing Oscilloscope and an in depth discussion of how to more completely use their features. Applications are also discussed.

TDS 420A, TDS 430A, TDS 460A & TDS 510A Reference contains a brief overview of oscilloscope operation.

TDS 510A Service Manual

Preface

TDS Family Programmer Manual contains information for programmed operation via the GPIB interface. Included are the complete command set, setup information, and programming examples.

TDS 510A Technical Reference contains performance verification procedures and specifications.

TDS 510A Service Manual

Preface

xvi

TDS 510A Service Manual

Introduction

Service Strategy

STOP. Throughout this manual, any field-replaceable component, assembly, or part of this oscilloscope is referred to generically as a module.

This manual contains all the information needed for periodic maintenance of the TDS 510A Digitizing 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 fresh unit obtained from the factory.

All modules are listed in Mechanical Parts List. To isolate a failure to a module, use the fault isolation procedures found in Section 6, Maintenance Information. To remove and replace any failed module, follow the instructions in Removal and Installation Procedures, also found in Section 6.

Service Offerings

Warranty Repair Service

Repair or Calibration

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 TDS 510A 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.

Tektronix warrants this product for three years from date of purchase, excluding probes for which the warranty is one year. (The warranty appears after the title page and copyright page in this manual.) Tektronix technicians provide warranty service at most Tektronix service locations worldwide. Your Tektronix product catalog lists all service locations worldwide.

The following services may be purchased to tailor repair and/or calibration of your TDS 510A Digitizing Oscilloscope to fit your requirements.

TDS 510A Service Manual

xvii

Introduction

Option 95. The oscilloscope, when ordered with option 95, is shipped with a Test Data Report.

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 510A Digitizing Oscilloscope. 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.

Self Service

Tektronix supports repair to the module level by providing Module Exchange and Module Repair and Return.

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 center. It is not updated to match current modules of the same type. Again, 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.

xviii

TDS 510A Service Manual

Before You Begin

Introduction

This manual is for servicing the TDS 510A Digitizing Oscilloscope. To prevent injury to yourself or damage to the oscilloscope, do the following tasks 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 Read Service Strategy in this section and Supplying Operating Power in

section 2. When using this manual for servicing, be sure to heed all warnings, cautions, and

notes.

TDS 510A Service Manual

xix

Introduction

TDS 510A Service Manual

Specifications

This chapter begins with a general description of the traits of the TDS 510A Digitizing Oscilloscope. Three sections follow, one for each of three classes of traits: nominal traits, warranted characteristics, and typical characteristics.

General Product Description

The TDS 510A is a portable, four-channel oscilloscope suitable for use in a variety of test and measurement applications and systems. Key features include:

H 500 MHz maximum analog bandwidth H 500 Megasamples/second maximum digitizing rate H Four-channel acquisition H Extensive triggering capabilities: including edge, logic, and glitch; optional

NTSC, PAL, SECAM, HDTV, and FlexFormat

video trigger modes H Waveform Math — Invert a single waveform and add, subtract, and multiply

two waveforms, and optionally integrate or differentiate a single waveform

or perform an FFT (fast fourier transform) on a waveform to display its

magnitude or phase versus its frequency

H Eight-bit digitizers H Up to 50,000-point record length per channel H Full GPIB software programmability; hardcopy output using GPIB, RS-232,

or Centronics ports (RS-232 and Centronics are option 13)

H Complete measurement and documentation capability H Intuitive graphic icon operation blended with the familiarity of traditional

horizontal and vertical knobs

H On-line help at the touch of a button H A full complement of advanced functions, like continuously updated

measurement results and local pass/fail decision making

(user definable format)

TDS 510A Service Manual

H Specialized display modes, including variable persistence, dot or vector

mode, sin(x)/x or linear display filters, and Fit-to-Screen compression of the

waveform record to fit on the screen

1–1

Specifications

User Interface

H A complement of advanced acquisition modes such as peak-detect, high-res-

olution, sample, envelope, and average

H A unique graphical user interface (GUI), an on-board help mode, and a

logical front-panel layout

H VGA output for driving remote monitors H NVRAM and an optional 1.44 Mbyte, DOS 3.3 or later, floppy disk drive for

saving waveforms and oscilloscope setups

Use a combination of front-panel buttons, knobs, and on-screen menus to control the many functions of this oscilloscope. The front-panel controls are grouped according to function: vertical, horizontal, trigger, and special. Set a function you adjust often, such as vertical positioning or the time base setting, directly by its own front-panel knob. Set functions which you change less often, such as vertical coupling and horizontal mode, indirectly using selected menus.

Menus

Indicators

General Purpose Knob

GUI

Pressing one (sometimes two) front-panel button(s), such as vertical menu, displays a main menu of related functions, such as coupling and bandwidth at the bottom of the screen. Pressing a main-menu button, such as coupling, displays a side menu of settings for that function, such as AC, DC, or GND (ground) coupling, at the right side of the screen. Pressing a side-menu button selects a setting such as DC.

On-screen readouts help you keep track of the settings for various functions, such as vertical and horizontal scale and trigger level. Some readouts use the cursors or the automatic parameter extraction feature (called measure) to display the results of measurements made or the status of the instrument.

Assign the general purpose knob to adjust a selected parameter function. Change parameters more quickly by toggling the SHIFT button. Use the same method as for selecting a function, except the final side-menu selection assigns the general purpose knob to adjust some function, such as the position of measurement cursors on screen, or the setting for fine gain.

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.

1–2

TDS 510A Service Manual

Signal Acquisition System

The signal acquisition system provides four vertical channels with calibrated vertical scale factors from 1 mV to 10 V per division. All four channels can be acquired simultaneously.

Each of the four channels can be displayed, vertically positioned, and offset, can have their bandwidth limited (100 MHz or 20 MHz) and their vertical coupling specified. Fine gain can also be adjusted.

Besides the four channels, up to three math waveforms and four reference waveforms are available for display. (A math waveform results when dual waveform operations, such as add, are specified on any two channels. A reference waveform results when you save a live waveform in a reference memory.)

Horizontal System

Specifications

Trigger System

There are three horizontal display modes: main only, main intensified, and delayed only. You can select among various horizontal record length settings.

A feature called “Fit to Screen” allows the user to view entire waveform records within a 10 to 15 division screen area. In other words, waveforms are compressed to fit on the screen.

You can delay by time with respect to the main trigger both the delayed display and the intensified zone on the main intensified display. You can set them 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).

You can also delay by a selected number of events the delayed display (or the intensified zone). In this 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, and so on, of that signal.

The triggering system supports a varied set of features for triggering the signal-acquisition system. Trigger signals recognized include:

TDS 510A Service Manual

H Edge (main- and delayed-trigger systems): This familiar type of triggering is

fully configurable for source, slope, coupling, mode (auto or normal), and

holdoff. H Logic (main-trigger system): This type of triggering can be based on pattern

(asynchronous) or state (synchronous). In either case, logic triggering is

1–3

Specifications

configurable for sources, for boolean operators to apply to those sources, for logic pattern or state on which to trigger, for mode (auto or normal), and for holdoff. Time-qualified logic triggering can also be specified.

H Pulse (main-trigger system): Pulse triggering is configurable for triggering

on runt or glitch pulses, or on pulse widths or periods inside or outside limits that you specify. It is also configurable for source, polarity, mode, and holdoff.

H Video (with option 05: Video Trigger): Video triggering is compatible with

standard NTSC, PAL, SECAM, and HDTV formats. An additional feature called FlexFormat format on which to trigger.

You can choose where the trigger point is located within the acquired waveform record by selecting the amount of pretrigger data displayed. Select presets of 10%, 50%, and 90% of pretrigger data in the horizontal menu, or assign the general purpose knob to set pretrigger data to any value within the limits of trigger position resolution.

(flexible format) allows the user to define the video

Acquisition Control

You can specify a mode and manner to acquire and process signals:

H Select equivalent-time sampling on repetitive signals or interpolation of

H Use peak-detect, high-resolution, sample, envelope, and average modes to

H Set the acquisition to stop after a single acquisition (or sequence of

H Select channel sources for compliance with limit tests. You can direct the

On-Board User Assistance

Help and autoset can assist you in setting up the oscilloscope to take your measurements.

points sampled on non-repetitive signals. Both can increase apparent sample rate on the waveform when maximum real-time rates are reached.

acquire signals.

acquisitions if acquiring in average or envelope modes).

oscilloscope to signal you or generate hard copy output based on the results. Also, you can create templates for use in limit tests.

1–4

Help

Help displays operational information about any front-panel control. When help mode is in effect, manipulating any front-panel control causes the oscilloscope to

TDS 510A Service Manual

Specifications

display information about that control. When help is first invoked, an introduction to help is displayed on screen.

Autoset

Autoset automatically sets up the oscilloscope for a viewable display based on the input signal.

Measurement Assistance

Once you have set up to make your measurements, the cursor and measure features can help you quickly make those measurements.

Cursor

Three types of cursors are provided for making parametric measurements on the displayed waveforms. Horizontal bar cursors (H Bar) measure vertical parameters (typically volts). Vertical bar cursors (V Bar) measure horizontal parameters (typically time or frequency) and now extend to the top and bottom of the screen. Paired cursors measure both amplitude and time simultaneously. These are delta measurements; that is, measurements based on the difference between two cursors.

Both H Bar and V Bar cursors can also be used to make absolute measurements; that is measurements relative to a defined level or event. For the H Bars, either cursor can be selected to read out its voltage with respect to any channel’s ground reference level. V Bars measure time with respect to the trigger point (event) of the acquisition. The cursors can control the portion of the waveform on which automatic measurements are made.

Measure

Storage and I/O

TDS 510A Service Manual

When the video trigger option installed (Option 05), the video line number can be selected using the vertical cursors. IRE amplitude (NTSC) can be measured using the horizontal cursors with or without the video trigger option installed.

Measure can automatically extract parameters from the signal input to the oscilloscope. Any four out of the more than 20 parameters available can be displayed to the screen. The waveform parameters are measured continuously with the results updated on screen as the oscilloscope continues to acquire waveforms.

Acquired waveforms may be saved in any of four nonvolatile REF (reference) memories or, if available, on a 3.5 inch, DOS 3.3-or-later compatible disk. The disk is available as option 1F. Any or all of the saved waveforms may be displayed for comparison with the waveforms currently being acquired.

1–5

Specifications

Display and Zoom

The oscilloscope is fully controllable and capable of sending and receiving waveforms over the GPIB interface. This feature makes the instrument ideal for making automated measurements in a production or research and development environment that calls for repetitive data taking. Self-compensation and self-diagnostic features built into the oscilloscope to aid in fault detection and servicing are also accessible using commands sent from a GPIB controller.

The hardcopy feature allows you to output waveforms and other on-screen information to a variety of graphic printers and plotters from the oscilloscope front panel, providing hard copies without requiring you to put the oscilloscope into a system-controller environment. You can make hardcopies in a variety of popular output formats. You can also save hardcopies in a disk file. The hardcopies obtained are based on what is displayed on-screen at the time hardcopy is invoked. The hardcopies can be stamped with date and time and spooled to a queue for printing at a later time. You can output screen information via GPIB, RS-232C, or Centronics interfaces.

The oscilloscope offers flexible display options. You can customize the following attributes of your display:

H Intensity: waveforms, readouts, and graticule H Style of waveform display(s): vectors or dots, intensified or non-intensified

samples, infinite persistence, and variable persistence with color coding

H Interpolation method: Sin(x)/x or Linear H Display format: xy or yt with various graticule selections including NTSC

and PAL to be used with video trigger

The oscilloscope also provides an easy way to focus in on those waveform features you wish to examine up close. By invoking zoom, you can magnify the waveform parameter using the vertical and horizontal controls to expand (or contract) and position it for viewing.

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TDS 510A Service Manual

Nominal Traits

This section contains tables that list the electrical and mechanical nominal traits that describe the TDS 510A Digitizing Oscilloscope.

Nominal traits are described using simple statements of fact, such as “Four, all identical” for the trait “Input Channels, Number of,” rather than in terms of limits that are performance requirements.

T able 1–1: Nominal Traits — Signal Acquisition System

Name Description

Bandwidth Selections 20 MHz, 100 MHz, and FULL (500 MHz) Digitizers, Number of Four, all identical Digitized Bits, Number of 8 bits Input Channels, Number of Four, all identical, called CH1 – CH4 Input Coupling DC, AC, or GND Input Impedance Selections

Ranges, Offset Volts/Div Setting

Range, Position ±5 divisions Range, Sensitivity 1 mV/div to 10 V/div

Displayed vertically with 25 digitization levels (DLs) per division and 10.24 divisions dynamic range with zoom off. A DL is the smallest voltage level change that can be resolved by the 8-bit A-D Converter, with the input scaled to the volts/division setting of the channel used. Expressed as a voltage, a DL is equal to 1/25 of a division times the volts/division setting.

GND input coupling disconnects the input connector from the attenuator and connects a ground reference to the input of the attenuator.

The sensitivity ranges from 1 mV/div to 10 V/div in a 1–2–5 sequence of coarse settings. Between a pair of adjacent coarse settings, the sensitivity can be finely adjusted. The resolution of such a fine adjustment is 1% of the more sensitive coarse setting. For example, between 50 mV/div and 100 mV/div , the volts/division can be set with 0.5 mV resolution.

1 MW or 50 W

1 mV/div – 99.5 mV/div 100 mV/div – 995 mV/div 1 V/div – 10 V/div

Offset Range

±1 V ±10 V ±100 V

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Nominal Traits

T able 1–2: Nominal Traits — Time Base System

Name Description

Range, Sample-Rate

1,3

Number of Channels On

Sample-Rate Range

Range, Equivalent Time or Interpolated Waveform Rate

2,3

1 or 2 3 or 4

500 MSamples/s to 100 GSamples/s

5 Samples/s – 500 MSamples/s 5 Samples/s – 250 MSamples/s

Range, Seconds/Division 500 ps/div to 10 s/div Record Length

500 samples, 1000 samples, 2500 samples, 5000 samples, 15,000 samples, and 50,000 samples. Up to four 50 K waveform records may be saved in NVRAM.

Range, Time Base Delay Time 16 ns to 250 seconds

The range of real-time rates, expressed in samples/second, at which a digitizer samples signals at its inputs and stores the samples in memory to produce a record of time-sequential samples.

The range of waveform rates for equivalent time or interpolated waveform records.

The Waveform Rate (WR) is the equivalent sample rate of a waveform record. For a waveform record acquired by real-time sampling of a single acquisition, the waveform rate is the same as the real-time sample rate; for a waveform created by interpolation of real-time samples from a single acquisition or by equivalent-time sampling of multiple acquisitions, the waveform rate is faster than the real time sample rate. For all three cases, the waveform rate is 1/(Waveform Interval) for the waveform record, where the waveform interval (WI) is the time between the samples in the waveform record.

The maximum record length of 50,000 samples is selectable with all acquisition modes except Hi Res. In Hi Res, the maximum record length is 15,000 samples.

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TDS 510A Service Manual

T able 1–3: Nominal Traits — Triggering System

Name Description

Range, Delayed Trigger Time Delay 16 ns to 250 s Range, Events Delay 2 to 10,000,000 Range (Time) for Pulse-Glitch or

Pulse-Width Triggering Ranges,Trigger Level or Threshold Source

2 ns to 1 s

Nominal Traits

Range

Any Channel Auxiliary Line

Video Trigger Modes of Operation (Option 05 Video Trigger)

Supports the following video standards:

H NTSC (525/60) – 2 field mono or 4 field H PAL (625/50) – 2 field mono, 8 field H SECAM H HDTV –

H FlexFormat

T able 1–4: Nominal Traits — Display System

±12 divisions from center of screen ±4 V ±300 V

(787.5/60) (1050.60) (1125/60) (1250/60)

(user definable standards)

User can specify: field rate, number of lines, sync pulse width and polarity, line rate, and vertical interval timing.

Name Description

CRT Type 7 inch diagonal monochrome, magnetic deflection CRT with horizontal raster orientation.

The phosphor is P4

Video Display Resolution 640 pixels horizontally by 480 pixels vertically in a display area of 5.04 inches horizontally

by 3.78 inches vertically Waveform Display Graticule Single Graticule: 401 × 501 pixels, 8 × 10 divisions, where divisions are 1 cm by 1 cm Waveform Display Grey Scale Sixteen levels in infinite-persistence and variable persistence display styles.

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Nominal Traits

T able 1–5: Nominal Traits — Interfaces, Output Ports, and Power Fuse

Name Description

Interface, GPIB GPIB interface complies with IEEE Std 488–1987 Interface, RS-232 (Option 13) RS-232 interface complies with EIA/TIA 574 (talk only) Interface, Centronics (Option 13) Centronics interface complies with Centronics interface standard C332-44 Feb 1977,

REV A

Interface, Video VGA video output1, non interlaced, with levels that comply with ANSI R5343A standard.

DB-15 connector.

Logic Polarity for Main- and Delayed-Trigger Outputs

Fuse Rating Either of two fuses2 may be used: a .25I × 1.25I (UL 198.6, 3AG): 6 A FAST, 250 V, or

VGA compatible at 30.6 kHz line sync rate.

Each fuse type requires its own fuse cap.

Negative TRUE. High to low transition indicates the trigger occurred.

a 5 mm × 20 mm, (IEC 127): 5 A (T), 250V.

T able 1–6: Nominal Traits — Mechanical

Name Description

Cooling Method Forced-air circulation with no air filter Construction Material Chassis parts constructed of aluminum alloy; front panel constructed of plastic laminate;

circuit boards constructed of glass-laminate. Cabinet is aluminum and is clad in Tektronix

Blue vinyl material. Finish Type Tektronix Blue vinyl-clad aluminum cabinet Weight Standard oscilloscope

12.3 kg (27 lbs), with front cover.

20.0 kg (44 lbs), when packaged for domestic shipment.

Rackmount oscilloscope

12.3 kg (27 lbs) plus weight of rackmount parts, for the rackmounted oscilloscope (Option 1R).

25.6 kg (56 lbs), when the rackmounted oscilloscope is packaged for domestic shipment.

Rackmount conversion kit

2.3 kg (5 lbs), parts only; 3.6 kg (8 lbs), parts plus package for domestic shipping.

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TDS 510A Service Manual

T able 1–6: Nominal Traits — Mechanical (Cont.)

Name Description

Overall Dimensions Standard oscilloscope

Height: 193 mm (7.6 in), with the feet installed. Width: 445 mm (17.5 in), with handle. Depth: 434 mm (17.1 in), with front cover installed.

Rackmount oscilloscope

Height: 178 mm (7.0 in). Width: 483 mm (19.0 in). Depth: 558.8 mm (22.0 in).

Nominal Traits

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Nominal Traits

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TDS 510A Service Manual

W arranted Characteristics

This section lists the electrical and environmental warranted characteristics that describe the TDS 510A Digitizing Oscilloscope.

Warranted characteristics are described in terms of quantifiable performance limits which are warranted.

NOTE. In these tables, those warranted characteristics that are checked in the procedure Performance Verification, found in Section 4, appear in boldface type under the column Name.

As stated above, this subsection lists only warranted characteristics. A list of typical characteristics starts on page 1–19.

Performance Conditions

The electrical characteristics found in these tables of warranted characteristics apply when the scope has been adjusted at an ambient temperature between +20_ C and +30_ C, has warmed-up for at least 20 minutes, and is operating at an ambient temperature between +4_ C and +50_ C (unless otherwise noted).

T able 1–7: Warranted Characteristics — Signal Acquisition System

Name Description

Accuracy, DC Gain ±1%

(For all sensitivities from 1 mV/div to 10 V/div with offsets from 0 V to ±100 V.)

Accuracy, Offset Volts/Div Setting

1 mV/div – 99.5 mV/div

100 mV/div – 995 mV/div

1 V/div – 10 V/div

Accuracy, DC Voltage Measurement, Averaged

Average of w 16 waveforms

Delta Volts between any two averages2 of w16

Offset Accuracy

±(0.2% × | Net Offset setting)

±(0.35% × | Net Offset setting)

±(1.0% × |(reading – Net Offset

0.06 div × volts/div setting) ±(1.0% × | reading | + 0.3 mV + 0.1 div× volts/div setting)

| + 1.5 mV + 0.1 div × volts/div

| + 15 mV + 0.1 div × volts/div

| + 150 mV + 0.1 div × volts/div

)| + Offset Accuracy +

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Warranted Characteristics

T able 1–7: Warranted Characteristics — Signal Acquisition System (Cont.)

Name Description Analog Bandwidth, DC-50 W Coupled or

DC-1 MW Coupled

Volts/Div

5 mV/div – 10 V/div

Bandwidth

DC – 500 MHz

2 mV/div – 4.98 mV/div

1 mV/div – 1.99 mV/div

DC – 350 MHz DC – 250 MHz

Cross T alk (Channel Isolation) w100:1 at 100 MHz and w30:1 at the derated bandwidth for any two channels having

equal volts/division settings Input Impedance, DC-1 MW Coupled 1 MW ± 0.5% in parallel with 10 pF ±2 pF Input Impedance, DC-50 W Coupled Input Voltage, Maximum, DC-1MW,

50 W ± 1% with VSWR v1.3:1 from DC – 500 MHz

300 V CAT II; derate at 20 dB/decade above 1 MHz AC-1 MW, or GND Coupled

Input Voltage, Maximum, DC-50W or

5 V

, with peaks v ±30 V

RMS

AC-50 W Coupled Lower Frequency Limit, AC Coupled v10 Hz when AC–1 MW Coupled; v200 kHz when AC – 50 W Coupled

Delay Between Channels, Full Band-

v250 ps for any two channels with equal volts/division and coupling settings

width, Equivalent Time

Net Offset = Offset – (Position  Volts/Div). Net Offset is the nominal voltage level at the center of the A-D converter dynamic range. Offset Accuracy is the accuracy of this Voltage level.

The samples must be acquired under the same setup and ambient conditions.

To ensure the most accurate measurements possible, run an SPC calibration first. When using the oscilloscope at a Volts/Div setting v5 mV/div, an SPC calibration should be run once per week to ensure that instrument performance levels meet specifications.

The limits given are for the ambient temperature range of 0_ C to +30_ C. Reduce the upper bandwidth frequencies by

4.0 MHz for each _ C above +30_ C.

The AC Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X, passive probes are used.

T able 1–8: Warranted Characteristics — Time Base System

Name Description Accuracy, Long Term Sample Rate and

±25 ppm over any w1 ms interval

Delay Time

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TDS 510A Service Manual

T able 1–9: Warranted Characteristics — Triggering System

Sensitivity, Edge-Type Trigger, D

Name Description

Warranted Characteristics

Accuracy (Time) for Pulse-Glitch or Pulse-Width Triggering

Coupled

Time Range

2 ns to 1 ms

1.02 ms to 1 s

Trigger Source

CH1 – CH4

Accuracy

±(20% of setting + 0.5 ns) ±(100 ns + 0.0025% of setting)

Sensitivity

0.35 division from DC to 50 MHz, increasing to 1 division at 500 MHz

0.55 division from DC to 50 MHz, increasing to 1.5 division at 500 MHz

Auxiliary 0.25 volts from DC to 50 MHz

Width, Minimum Pulse and Rearm, for Pulse Triggering

Pulse Class

Glitch Runt Width

Minimum Pulse Width

2 ns

2.5 ns 2 ns

Minimum Rearm Width

2 ns + 5% of Glitch Width Setting

2.5 ns 2 ns + 5% of Width Upper Limit

Setting

Accuracy , Trigger Level or Threshold, DC Coupled

Trigger Source

Any Channel

Accuracy

±(2% of |(Setting – Net Offset)| + 0.3 div  volts/div setting +

Offset Accuracy)

Auxiliary

Jitter (Option 05 Video Trigger) 17 ns Input Signal Sync Amplitude for Stable

0.6 division to 4 division (1 division to 4 divisions in Numerical Field)

on HDTV signal; 60 ns

p-p

±(6% of |Setting| + 8% of p-p signal + 100 mV)

on NTSC or PAL signal

p-p

Triggering (Option 05 Video Trigger)

The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on the selected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not “roll” across the screen on successive acquisitions. The TRIG’D LED stays constantly lighted when the SEC/DIV setting is 2 ms or faster but may flash when the SEC/DIV setting is 10 ms or slower.

The waveform interval (WI) is the time between the samples in the waveform record. Also, see the footnote for the characteristics Sample Rate Range and Equivalent Time or Interpolated Waveform Rate on page 1–8 and net offset on page 1–14.

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Warranted Characteristics

T able 1–10: Warranted Characteristics — Interfaces, Output Ports and Power Requirements

Name Description Logic Levels, Main- and Delayed-Trigger

Outputs

Characteristic

(HI)

out

(LO)

out

Limits

w2.5 V open circuit; w1.0 V into a 50 W load to ground v0.7 V into a load of v4 mA;

v0.25 V into a 50 W load to ground

Output Voltage and Frequency, Probe Compensator

Characteristic

Output Voltage

Frequency

Limits

0.5 V (base-top) ±1% into a w50 W load

1 kHz ±5% Output Voltage, Channel 3 Signal Out 20 mV/division ±10% into a 1 MW load; 10 mV/division ±10% into a 50W load Source Voltage 90 to 250 VAC

CAT II, continuous range

RMS

Source Frequency 45 Hz to 440 Hz Power Consumption v300 W (450 VA)

T able 1–11: Warranted Characteristics — Environmental, Safety , and Reliability

Name Description

Atmospherics Temperature:

Operating: +0_ C to +50_ C (disk drive operation limited to +4_ C minimum); Non-operating: –22_ C to +60_ C

Relative humidity with floppy disk (optional):

Operating: To 80%, at or below +29_ C; Operating: To 20%, at or below +50_ C Non-operating: To 90%, at or below +40_ C; Non-operating: To 5%, at or below +50_ C

Relative humidity without floppy disk:

Operating: To 95%, at or below +40_ C; Operating: To 75%, from +41_ C to +55_ C

Altitude:

To 4570 m (15,000 ft.), operating; To 12190 m (40,000 ft.), non-operating

Dynamics Random vibration without floppy disk installed:

0.31 g

3.07 g

, from 5 to 500 Hz, 10 minutes each axis, operating;

RMS

, from 5 to 500 Hz, 10 minutes each axis, non-operating

RMS

User-Misuse Simulation Electrostatic Discharge Susceptibility: Up to 8 kV with no change to control settings or

impairment of normal operation; up to 15 kV with no damage that prevents recovery of normal operation by the user

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TDS 510A Service Manual

Specifications

T able 1–12: Certifications and compliances

EC Declaration of Conformity Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage Directive

73/23/ECC for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:

EN 50081-1 Emissions:

EN 55022 Class B Radiated and Conducted Emissions EN 60555-2 AC Power Line Harmonic Emissions

EN 50082-1 Immunity:

IEC 801-2 Electrostatic Discharge Immunity IEC 801-3 RF Electromagnetic Field Immunity IEC 801-4 Electrical Fast T ransient/Burst Immunity IEC 801-5 Power Line Surge Immunity

Low Voltage Directive 73/23/EEC: EN 61010-1 Safety requirements for electrical equipment for measurement,

control, and laboratory use FCC Compliance Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A Limits Certifications Underwriters Laboratories certified to Standard UL311 1-1 for Electrical Measuring and Test

Equipment. Canadian Standards Association certified to Standard CAN/CSA-C22.2 No. 1010.1-92, Safety

Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use. T emperature (operating) 0_ C to +50_ C Altitude (maximum operating) 2000 meters Safety Class Test and Measuring CSA Certified Power Cords CSA Certification includes the products and power cords appropriate for use in the North America

power network. All other power cords supplied are approved for the country of use. Overvoltage Category Category: Examples of Products in this Category:

CA T III Distribution-level mains, fixed installation

CA T II Local-level mains, appliances, portable equipment

CA T I

Pollution Degree 2 Do not operate in environments where conductive pollutants may be present.

Signal levels in special equipment or parts of equipment, telecommunications, electronics

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Specifications

1–18

TDS 510A Service Manual

Typical Characteristics

ettli

rrors

The tables in this section list the typical characteristics that describe the TDS 510A Digitizing Oscilloscope.

Typical characteristics are described in terms of typical or average performance. Typical characteristics are not warranted.

T able 1–13: Typical Characteristics — Signal Acquisition System

Name Description

Frequency Limit, Upper, 100 MHz Bandwidth Limited

Frequency Limit, Upper , 20 MHz Bandwidth Limited

Calculated Rise Time

Nonlinearity Step Response S

ng E

100 MHz

20 MHz

Volts/Div Setting

5 mV/div–10 V/div 2 mV/div–4.98 mV/div 1 mV/div–1.99 mV/div

Rise Time

800 ps

1.2 ns

1.6 ns

<1 DL, differential; v1 DL, integral, independently based

Volts/Div Setting Step Ampli-

tude

1 mV/div–99.5 mV/ div

100 mV/ div–995 mV/div

1 V/div–10 V/div

v2 V v20 V v200 V

  

20 ns

v0.5 v1.0 v1.0

100 ns

v0.2 v0.5 v0.5



20 ms

v0.1 v0.2 v0.2

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Typical Characteristics

T able 1–13: Typical Characteristics — Signal Acquisition System (Cont.)

Name Description

Accuracy, DC Voltage Measurement, Not Averaged

Any Sample

±(1.0% × |(reading – Net Offset

)| + Offset

Accuracy +0.6 mV × volts/div setting + 0.13 div)

Delta Volts between any two samples acquired under the same

±(1.0% × | reading | + 1.2 mV + 0.26 div × volts/div setting)

setup and ambient conditions

The numbers given are valid 0_C to +30_C and will increase as the temperature increases due to the degradation in bandwidth. Rise time is calculated from the bandwidth. It is defined by the following formula:

Rise Time (ns) +

400

BW (MHz)

Note that if you measure rise time, you must take into account the rise time of the test equipment (signal source, etc.) that you use to provide the test signal. That is, the measured rise time (RTm) is determined by the instrument rise time (RTi) and the rise time of the test signal source (RTgen) according to the following formula:

+ RT

The values given are the maximum absolute difference between the value at the end of a specified time interval after the

) RT

gen

mid-level crossing of the step, and the value one second after the mid-level crossing of the step, expressed as a percentage of the step amplitude.

3 Net Offset = Offset – (Position  Volts/Div). Net Offset is the nominal voltage level at the center of the A-D converter

dynamic range. Offset Accuracy is the accuracy of this Voltage level.

T able 1–14: Typical Characteristics — Time Base System

Name Description

Aperture Uncertainty v5 ps Accuracy, Delta Time Measurement For single-shot acquisitions using single-shot sample acquisition modes.

Time Measurement Error ≤ .15* Si + (25 ppm |Reading|) + (Time Per Div B 1000) Add 50 ps (typical) Channel Skew for 2 channel measurements. Sample calculation:

To measure the width of a 65.5 ns pulse at 1 GS/sec sampling, Time Measurement Error

≤ (0.15 × 1 ns) + (2.5 × 10–5)(65.5 ns) + (50 ns/divB1000) ≤ 0.15 ns + 0.002 ns + 0.05 ns ≤ 202 ps

The limits are given for signals having pulse height ≥ 5 div, pulse duration v 10 divisions, reference level = 50% mid-point, filter set to Sin (x) /x acquired at ≥ 5 mV/div, 1.4 vTr/Si v 5, where Si is the sample interval and tr is the signal rise time.

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TDS 510A Service Manual

T able 1–15: Typical Characteristics — T riggering System

Name Description

Trigger Source

Any Channel

Auxiliary

Input, Auxiliary Trigger

Trigger Position Error , Edge T riggering Acquire Mode

The input resistance is w1.5 kW; the maximum safe input voltage is ±20 V (DC + peak AC).

Trigger-Position Error

Typical Characteristics

1,2

Sample, Hi-Res, Average Peak Detect, Envelope

Holdoff, V ariable, Main Trigger

Minimum: For any horizontal scale setting, the minimum holdoff is 10 times that setting, but is never less than 1 ms or longer than 5 s.

Maximum: For any horizontal scale setting, the maximum holdoff is at least 2 times the minimum holdoff for that setting, but is never more than 10 times the minimum holdoff for that setting.

Width, Minimum Pulse and Rearm, for Logic Triggering or Events Delay

Lowest Frequency for Successful Operation

5 ns

30 Hz

of “Set Level to 50%” Function Sensitivity, Edge Trigger, Not DC Coupled4Trigger Coupling

Noise Reject High Frequency Reject

Low Frequency Reject

Sensitivities, Logic-Type Trigger/Events Delay , DC Coupled

Sensitivities, Pulse-T ype Runt Trigger

1.0 division, from DC to 100 MHz with a minimum slew rate of 25 divisions/ms at the trigger level or the threshold crossing.

1.0 division, from DC to 200 MHz with a minimum slew rate of 25 divisions/ms at the trigger level or the threshold crossing.

Sensitivities, Pulse-T ype Trigger Width and

Glitch

1.0 division with a minimum slew rate of 25 div/ms at the trigger level or the threshold

crossing. For <5 ms pulse width or rearm time, 2 divisions are required. Sync Width (Option 05 Video Trigger) min. 400 ns for HDTV signals Sync Duty Cycle

min. 50 to 1 (Option 05 Video Trigger)

±(1 WI + 1 ns) ±(2 WI + 1 ns)

Typical Signal Level for Stable Triggering

Same as DC-coupled limits4 for frequencies above 60 Hz. Attenuates signals below 60 Hz.

Three and one half times the DC-coupled limits.

One and one half times the DC-coupled limits5 from DC to 30 kHz. Attenuates signals above 30 kHz.

One and one half times the DC-coupled limits5 for frequencies above 80 kHz. Attenuates signals below 80 kHz.

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Typical Characteristics

T able 1–15: Typical Characteristics — T riggering System (Cont.)

Name Description

Hum Rejection7 (Option 05 Video Trigger)

The trigger position errors are typically less than the values given here. These values are for triggering signals having a

NTSC and PAL: –20 dB without any trigger spec deterioration. Triggering will continue down to 0 dB with some performance deterioration.

slew rate at the trigger point of ±0.5 division/ns.

The minimum pulse width and rearm width required for logic-type triggering or events delaying to occur.

See the characteristic Sensitivity, Edge-T ype T rigger, DC Coupled in Table 1–9, which begins on page 1–15.

The minimum signal levels required for stable logic or pulse triggering of an acquisition or for stable counting of a DC-coupled events delay signal. Also, see the footnote for Sensitivity, Edge-T ype T rigger, DC Coupled in this table. (Stable counting of events is counting that misses no events or produces no extra events.)

The input signal is clamped at the bottom of the sync for the trigger path only. To remove the hum from the display , use a Tektronix V ideo Display Clamp.

T able 1–16: Typical Characteristics — Data Handling

Name Description

Time, Data-Retention, Nonvolatile

1,2

Memory

Battery life is w 5 years

Floppy disk 3.5 inch, 720 K or 1.44 Mbyte, DOS 3.3-or-later compatible

The time that reference waveforms, stored setups, and calibration constants are retained when there is no power to the oscilloscope.

Data is maintained by small lithium-thionyl-chloride batteries internal to the memory ICs. The amount of lithium is so small in these ICs that they can typically be safely disposed of with ordinary garbage in a sanitary landfill.

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TDS 510A Service Manual

Installation

This chapter contains information about supplying operating power, the operating environment, applying and interrupting power, repackaging for shipment, and installed options.

Supplying Operating Power

STOP. Read all information and heed all warnings in this section before connecting the oscilloscope to a power source.

WARNING. AC POWER SOURCE AND CONNECTION. The oscilloscope operates from a single-phase power source. It has a three-wire power cord and two-pole, three-terminal grounding type plug. The voltage to ground (earth) from either pole of the power source must not exceed the maximum rated operating voltage, 250 volts.

Before making connection to the power source, be sure the oscilloscope has a suitable two-pole, three-terminal grounding-type plug.

GROUNDING. This oscilloscope is safety Class 1 equipment (IEC designation). All accessible conductive parts are directly connected through the grounding conductor of the power cord to the grounded (earthing) contact of the power plug.

WARNING. The power input plug must be inserted only in a mating receptacle with a grounding contact where earth ground has been verified by a qualified service person. Do not defeat the grounding connection. Any interruption of the grounding connection can create an electric shock hazard.

For electric shock protection, the grounding connection must be made before making connection to the oscilloscope input or output terminals.

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2–1

Installation

Power Cord Information

Operating Voltage

Memory Backup Power

A power cord with appropriate plug configuration is supplied with each oscilloscope. Table 2–1 gives the color-coding of the conductors in the power cord. If you require a power cord other than the one supplied, refer to Table 2–2 Power-Cord and Plug Identification.

T able 2–1: Power-Cord Conductor Identification

Conductor Color Alternate Color

Ungrounded (Line) Brown Black Grounded (Neutral) Light Blue White Grounded (Earthing) Green/Y ellow Green

This oscilloscope operates with any line voltage from 90–250 VAC

RMS

with any line frequency from 45–440 Hz. There are two fuses, either of which may be used throughout the line voltage and frequency ranges. (The two fuses are not totally interchangeable as each requires a different fuse cap.)

Memory modules with on-board batteries allow the oscilloscope to retain some types of data upon loss of the AC power source. The stored adjustment constants, saved front-panel settings, current front-panel settings (oscilloscope status), and waveforms saved in memory are retained.

The on-board batteries of the memory modules have a shelf life of about five years. Partial or total loss of stored settings upon power on may indicate that the memory modules need to be replaced.

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TDS 510A Service Manual

T able 2–2: Power Cord Identification

Plug Configuration Normal Usage Option Number

Installation

North America 115 V

Europe 230 V

United Kingdom 230 V

Australia 230 V

Standard

TDS 510A Service Manual

North America 230 V

Switzerland 230 V

2–3

Installation

Operating Environment

The following environmental requirements are provided to ensure proper operation and long oscilloscope life.

Operating Temperature

Ventilation Requirements

The oscilloscope can be operated where the ambient air temperature is between +0_ and +50_ C and can be stored in ambient temperatures from –22_ to +60_ C. Operation of the disk drive is limited to +4_ C minimum. After storage at temperatures outside the operating limits, allow the chassis to stabilize at a safe operating temperature before applying power.

The oscilloscope is cooled by air drawn in and exhausted through its cabinet side panels by an internal fan. To ensure proper cooling of the oscilloscope, allow at least two inches clearance on both sides and 3/4 inch on the bottom of the oscilloscope. (The feet on the bottom of the oscilloscope provide the required clearance when set on flat surfaces.) The top of the oscilloscope does not require ventilation clearance.

CAUTION. If air flow is restricted, the oscilloscope power supply may temporarily shut down.

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TDS 510A Service Manual

Applying and Interrupting Power

Consider the following information when you power up or power down the oscilloscope, or when power is interrupted due to an external power failure.

Installation

Power On

Power Off

Upon power on, the oscilloscope runs its power-on self check. If it passes, the oscilloscope displays a “passed” status message and a prompt to press CLEAR MENU to continue. If it fails, the oscilloscope displays a diagnostic log that identifies the area(s) that failed and a prompt to press CLEAR MENU to continue. See Chapter 6, Maintenance, for information on diagnostics and fault isolation.

CAUTION. DO NOT power off the oscilloscope when either running a signal path compensation or when doing any of the adjustments described in Chapter 5, Adjustment Procedures. To do so might result in the loss of internally stored adjustment constants.

In general, do not power off the oscilloscope when doing operations that affect the data types listed in Table 2–3. Wait for the oscilloscope to finish the operation when doing adjustments, saving waveforms, or saving setups.

Improper power off or unexpected loss of power to the oscilloscope can result in the following corruptions of nonvolatile RAM (NVRAM). The following table describes the messages displayed when power is restored after an abnormal power off.

TDS 510A Service Manual

T able 2–3: Effects of Corrupted Data

Corrupted Data Type Results

Adjustment Constants:

Signal Path Compensation A signal path compensation is required. Voltage Reference A voltage reference adjustment is required

(Chapter 5).

Frequency Response A frequency response adjustment is

required (Chapter 5). Error Log Errors logged are lost. Reference Waveforms Waveform Lost Saved Setups Setup Lost

2–5

Installation

Repackaging Instructions

Use a corrugated cardboard shipping carton having a test strength of at least 126 g (275 pounds) and with an inside dimension at least 15 cm (six inches) greater than the oscilloscope dimensions.

If the oscilloscope is being shipped to a Tektronix Service Center, enclose the following information: the owners address, name and phone number of a contact person, type and serial number of the oscilloscope, reason for returning, and a complete description of the service required.

Seal the shipping carton with an industrial stapler or strapping tape. Mark the address of the Tektronix Service Center and also your own return

address on the shipping carton in two prominent locations.

Installed Options

Your oscilloscope may be equipped with one or more options. Except for the line-cord options described by Table 2–2 (on page 2–3 of this section), all options and optional accessories are listed and described in Chapter 7, Options. For further information and prices of options, see your Tektronix Products catalog or contact your Tektronix Field Office.

2–6

TDS 510A Service Manual

Operating Instructions

This section contains general operating instructions for the TDS 510A Digitizing Oscilloscope. The complete user instructions are found in the User Manual.

Additional instructions are integrated into the service procedures found in later sections of this manual. For instance, the procedures found in Chapter 4 Performance Verification contain instructions for making the front-panel settings required to check each instrument characteristic included there. Also, the general instructions for operating internal diagnostic routines are found in Chapter 6, Maintenance. You may also find the Product Description in Chapter 1 useful for understanding how the oscilloscope functions.

Screen Layout

The screen layout is illustrated in Figure 2–1 on page 2–8. Note that the figure illustrates a full graticule; you may also select a grid, crosshair, or frame graticule from the display menu.

Basic Procedures

How to Power On

Before doing service, read the following operating instructions. These instructions are at the level appropriate for servicing this oscilloscope.

Push the principal power switch found on the rear panel of the oscilloscope, then push the ON/STBY (standby) switch to toggle the oscilloscope into operation. The switch at the rear panel is the true power disconnect switch. The ON/ STBY(standby) switch simply toggles operation on and off.

WARNING. The principal power switch at the rear panel is the true power disconnect switch. The ON/STBY (standby) switch simply toggles operation on and off. When connected to a power source and when the principal power switch is on, the internal power supplies and other circuitry of this oscilloscope are energized regardless of the setting of the ON/STBY switch.

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Operating Instructions

Brief status information

Graticule and waveforms

Waveform reference

symbols show ground levels

and waveform sources

Vertical scale, horizontal scale,

and trigger level readouts

Pop-up menu

Position of waveform

record relative to

the screen and display

General purpose

knob readout

Side menu area. Readouts for measurements move here when CLEAR MENU is pressed.

How to Use Help

How to Use the Status

Main menu display area. Readouts in lower graticule

area move here when CLEAR MENU is pressed.

Figure 2–1: Map of Display Functions

Push the HELP front-panel button to enter help mode. Front-panel knobs and buttons now display information about their function when turned or pushed. Push HELP again to exit help mode.

To get help information on a menu item, display the menu desired (if you are in help mode, exit help first). Push HELP. Now the menu buttons display information about their function when pushed.

Push the SHIFT, then the STATUS front-panel buttons to display the status menu. You will find messages reflecting the state of the acquisition system, whether it is running or stopped (and if it is stopped, why), as well as setup-related information.

2–8

TDS 510A Service Manual

Operating Instructions

ertical

ctio

trols: Access

orizontal

ctio

trols

rigger

ctio

trols

How to Set Functions

all vertical functions and inputs from

Special Function Controls:

Access all functions except

vertical, horizontal, and trigger

functions from this front-panel

control block.

Most functions can be set either by using one or two front-panel buttons or knobs, or by pushing a front-panel button to use a main menu, and then a side menu to set the function. The following steps illustrate both procedures.

1. Locate the block that contains the function to be set.

Fun

n Con

this front-panel control block.

Fun

Access all horizontal functions

from this front-panel block.

n Con

Access all trigger functions from

Fun

this front-panel block.

n Con

TDS 510A Service Manual

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Operating Instructions

2. Select the waveform source(s). Position, scale, and set trigger level for

waveform source(s) directly from the front-panel. (Examples of possible control selections are given in the steps that follow.)

4231

a. Input waveforms into these channels (7). Example: CH 1. b. Push any channel button (8) to display its waveform. The last channel

turned on determines which waveform is positioned and scaled. The indicator above the channel last selected is lighted. Example: Push

CH 1; then CH 2.

c. Vertically (1) and horizontally (2) scale and position the waveform(s)

selected. Example: Set the scale to 100 mV/div and center the waveform on screen.

2–10

d. Stop and start acquiring waveforms (3). Example: Push RUN/STOP if

not acquiring.

TDS 510A Service Manual

Operating Instructions

e. Adjust trigger level (6) to trigger the waveform(s) selected or use these

buttons (5) to either set a trigger level at the mid-amplitude level of the selected waveform or to force a single trigger. Example: Push SET

LEVEL TO 50%.

3. Set all other functions using menus. a. Choose the waveform source (8) first if setting a vertical function;

otherwise skip to step b. Example: Push CH 2.

b. Push SHIFT (4) if the function to be set is highlighted in blue;

otherwise skip to step c.

c. Push the front-panel button that corresponds to the menu containing the

function. A main menu (14) for selecting among related functions appears. Example: Push VERTICAL MENU.

                             0V

TDS 510A Service Manual

d. Select a function from the main menu using the main menu buttons (12).

A side menu for selecting among that the available settings for that function appears. Example: Push Coupling (13).

2–11

Operating Instructions

e. Select the setting for the function from the side menu (9) using the side

menu buttons (11). Example: Push AC (10).

How to Set Complex

Functions

A few functions require more than just two levels (main and side) of menus to completely specify their settings. In such cases, either the main menu, the side menu, or both are modified to supply additional choices. The procedures that follow show both schemes.

1. Set up a function using pop-up menus:

2–12

a. For some selections, pushing a main-menu button pops up a menu (18)

of subfunctions. Example: Push Type (17).

                           

b. Pushing the button that popped up the menu (17) toggles through the

pop-up menu choices. Example: Repeatedly push Type to toggle through the pop-up menu. Notice the other main-menu button labels change accordingly. Toggle back to Edge.

c. Complete the setting of the desired mode by selecting from the main

menu and the side menu that results. Example: Push Mode & Holdoff (16), and then push Normal (15).

TDS 510A Service Manual

Operating Instructions

2. Set up a function using the general purpose knob (20). (The examples of possible menu selections in substeps that follow assume you’ve pushed TRIGGER MENU.)

19 20

a. Pushing some main menu buttons displays a side menu with labels

containing readouts that can be varied. Example: Push Level (21).

b. Pushing the side-menu button assigns the knob to control the readout

appearing in the button label. It also copies the readout to the general purpose knob readout area in the right corner of the screen. Example: Push Level (19).

c. Use the general purpose knob (20) to adjust the trigger level to the

setting desired. Example: Turn the knob to –20 mV.

More About the General Purpose Knob. As you just saw, the general purpose knob can be used to extend the number of choices available to a side-menu button. The general purpose knob can also be assigned to control the following functions:

TDS 510A Service Manual

H Cursor positioning H Display intensities H Delay time

2–13

Operating Instructions

H Number of events H Trigger position H Holdoff H Offset H Variable persistence

In all cases, the menus are used to select the function to which the general purpose knob is assigned. The following attributes apply to this knob:

H Depending on the function it is assigned to control, the general purpose knob

may vary numerical readouts, position objects (cursors) on screen, or select between icon-label settings that show up in side-menu labels. Once assigned, the general purpose knob can change parameters by toggling the SHIFT button.

H The general purpose knob has a readout area at the upper right corner of the

screen. (See Figure 2–1.) This readout always reflects the name and value of the function that the general purpose knob is currently controlling.

H Whenever the general purpose knob assignment is changed, a knob icon

appears immediately to the left of the general purpose knob readout to notify you of the assignment change. The icon is removed as soon as you use the general purpose knob to change the value of the function it is assigned to.

H To assign the general purpose knob to control a function, display the menu

containing the function; then select the function. (Note that not all functions can be controlled by the general purpose knob.)

H Whenever the menu is removed, the general purpose knob is not assigned

and does not control any function. (An exception is the cursor function. If cursors are turned on, removing the menu leaves the knob assigned to control the cursors until reassigned by selecting another menu and function that uses the knob.)

H The general purpose knob also has a SELECT button. This button is used to

toggle the knob between the control of either of the two cursors displayed when cursors are turned on in the cursor menu.

Display and Utility Menus. Using the techniques described for using menus, you can access and change functions in the display menu and utilities menu. In the Display menu, you can set the following functions:

H Intensity: waveforms, readouts, graticule.

2–14

H Style of waveform display(s): vectors or dots, intensified or non-intensified

samples, and infinite or variable persistence.

TDS 510A Service Manual

Operating Instructions

H Display format: XY or YT. H Graticule format: type. H Waveform interpolation filter and readout options.

From the Utility menu, you can configure the GPIB port (talk/listen, address, etc.) and access internal routines for self diagnostics and self compensation. Instructions for setting up communication over the GPIB are found in Chapter 5, Adjustment Procedures.

TDS 510A Service Manual

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Operating Instructions

2–16

TDS 510A Service Manual

Circuit Description

This chapter describes the electrical operation of the TDS 510A Digitizing Oscilloscope using the major circuit blocks or modules.

This chapter has two main parts:

H Logic Conventions describes how logic functions are discussed and

H Module Overview describes circuit operation from a functional-circuit block

Logic Conventions

The oscilloscope contains many digital logic circuits. This manual refers to these circuits with standard logic symbols and terms. Unless otherwise stated, all logic functions are described using the positive-logic convention: the more positive of the two logic levels is the high (1) state, and the more negative level is the low (0) state. Signal states may also be described as “true” meaning their active state or “false” meaning their non-active state. The specific voltages that constitute a high or low state vary among the electronic devices.

represented in this manual.

perspective.

Module Overview

General

Input Signal Path

Active-low signals are indicated by a tilde prefixed to the signal name (~RESET). Signal names are considered to be either active-high, active-low, or to have both active-high and active-low states.

This module overview describes the basic operation of each functional circuit block as shown in Figure 9–2 on page 9–2.

The Tektronix TDS 510A Digitizing Oscilloscope is a portable, four-channel instrument. Each channel provides a calibrated vertical scale factor. All of the four channels can be acquired simultaneously.

A signal enters the oscilloscope through a probe connected to a BNC on the A15 Attenuator board.

Attenuators. Circuitry in the attenuator selects the input coupling, termination, and the attenuation factor. The processor system, by way of the acquisition system, controls the attenuators. For example, if 50 W input termination is

TDS 510A Service Manual

3–1

Circuit Description

selected and the input is overloaded, the processor system switches the input to the 1 MW position.

Probe Coding Interface. Probe coding interface signals pass through the A15 Attenuator to the acquisition system, where they are sensed and controlled.

Acquisition System. The acquisition system amplifies the input signals, converts them to digital signals, and controls the acquisition process under direction of the processor system. The acquisition system includes the trigger, acquisition timing, and acquisition mode generation and control circuitry.

D1 Bus. The acquisition system passes the digital values representing the acquired waveform through the A14 D1 Bus to the A11 DRAM Processor/Display board. This happens after a waveform acquisition is complete if the digital signal processor in the processor system requests the waveform.

Voltage Controlled

Oscillator (VCO)

Processor System. The processor system contains a 68020 microprocessor that

controls the entire instrument. It includes the firmware. It also includes a GPIB interface. You can reprogram the firmware from a remote controller using the GPIB and an external software package.

The processor also includes a digital signal processor. This signal processor processes each waveform as directed by the system processor. Waveforms and any text to be displayed are passed on to the display system. The A11 DRAM Processor/Display board contains both the processor and display systems.

Display System. Text and waveforms are processed by different parts of the display circuitry. The display system sends the text and waveform information to the tube assembly as a video signal. The display system also generates and sends vertical (VSYNC) and horizontal (HSYNC) sync signals to the tube assembly. A VGA-compatible video output is at the rear of the oscilloscope.

Master clocks for the acquisition system are generated by a voltage controlled oscillator on the A21 VCO Board and circuitry on the A10 Acquisition board. The circuitry makes up a phased locked loop. The master clock is divided down by the A10 Acquisition circuitry under control of the processor system.

3–2

Tube Assembly

All information (waveforms, text, graticules, and pictographs) is displayed by the A20 Display system. The Display system generates the high voltages necessary to drive the display tube. It also contains the video amplifier, horizontal oscillator, and the vertical and horizontal yoke driver circuitry.

TDS 510A Service Manual

Circuit Description

Front Panel

Rear Panel

Low V oltage Power Supply

The processor system sends instructions to and receives information from the Front-Panel Processor on the A12 Front Panel board. The Front-Panel Processor reads the front-panel switches and potentiometers. Any changes in their settings are reported to the processor system. The Front-Panel Processor also turns the LEDs on and off and generates the bell signal.

Front-panel menu switches are also read by the Front-Panel Processor. The processor sends any changes in menu selections to the processor system. The ON/STBY switch is one of the menu switches. However, it is not read by the Front-Panel Processor, but passes through the A12 Front Panel board and the A11 DRAM Processor/Display board to the low voltage power supply.

The front panel also generates the probe compensation signals SIGNAL and GND.

The GPIB connector provides access to stored waveforms, and allows external control of the oscilloscope.

You can make hardcopies on the GPIB, RS-232 and Centronics ports.

The low voltage power supply is a switching power converter with active power factor control. It supplies power to all of the circuitry in the oscilloscope.

Fan

The principal POWER switch, located on the rear panel, controls all power to the oscilloscope including the Low Voltage Power Supply. The ON/STBY switch, located on the front panel, also controls all of the power to the oscilloscope except for part of the circuitry in the Low Voltage Power Supply.

If the power is going off, the power supply sends a power fail (~PF) warning to the processor system.

The fan provides forced air cooling for the oscilloscope. It connects to +25 V from the Low Voltage Power Supply by way of the A11 DRAM Processor/Display module.

TDS 510A Service Manual

3–3

Circuit Description

3–4

TDS 510A Service Manual

Performance Verification Procedures

Two types of Performance Verification procedures can be performed on this product; Brief Procedures and Performance Tests. You may not need to perform all of these procedures, depending on what you want to accomplish.

H To rapidly confirm that the oscilloscope functions and was adjusted properly,

just do the brief procedures under Self Tests, which begin on page 4–5. Advantages: These procedures are quick to do, require no external

equipment or signal sources, and perform extensive functional and accuracy testing to provide high confidence that the oscilloscope will perform properly. They can be used as a quick check before making a series of important measurements.

H To further check functionality, first do the Self Tests just mentioned; then do

the brief procedures under Functional Tests that begin on page 4–7. Advantages: These procedures require minimal additional time to perform,

require no additional equipment other than a standard-accessory probe, and more completely test the internal hardware of the oscilloscope. They can be used to quickly determine if the oscilloscope is suitable for putting into service, such as when it is first received.

H If more extensive confirmation of performance is desired, do the Perfor-

mance Tests, beginning on page 4–15, after doing the Functional and Self Tests just referenced.

Advantages: These procedures add direct checking of warranted specifications. They require more time to perform and suitable test equipment is required. (See Equipment Required beginning on page 4–16.)

If you are not familiar with operating this oscilloscope, read the user manual. These contain instructions that will acquaint you with the use of the front-panel controls and the menu system.

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Performance Verification Procedures

Conventions

Throughout these procedures the following conventions apply:

H Each test procedure uses the following general format:

H Each procedure consists of as many steps, substeps, and subparts as required

Title of Test Equipment Required Prerequisites Procedure

to do the test. Steps, substeps, and subparts are sequenced as follows:

1. First Step a. First Substep

H First Subpart H Second Subpart

b. Second Substep

2. Second Step

H In steps and substeps, the lead-in statement in italics instructs you what to

do, while the instructions that follow tell you how to do it, as in the example step below, “Initialize the oscilloscope” by doing “Press save/recall SETUP. Now, press the main-menu button...”.

Initialize the oscilloscope: Press save/recall SETUP. Now, press the main-menu button Recall Factory Setup; then the side-menu button OK Confirm Factory Init.

H Where instructed to use a front-panel button or knob, or select from a main

or side menu, or verify a readout or status message, the name of the button or knob appears in boldface type: “press SHIFT; then UTILITY, press the main-menu button System until Cal is highlighted in the pop-up menu. Verify that the status message is Pass in the main menu under the Voltage Reference label.”

STOP. The symbol at the left is accompanied by information you must read to do the procedure properly.

4–2

H Refer to Figure 4–1: “Main menu” refers to the menu that labels the seven

menu buttons under the display; “side menu” refers to the menu that labels

TDS 510A Service Manual

Performance Verification Procedures

the five buttons to the right of the display. “Pop-up menu” refers to a menu that pops up when a main-menu button is pressed.

Brief status information

Graticule and waveforms

Waveform reference

symbols show ground levels

and waveform sources

Vertical scale, horizontal scale,

and trigger level readouts

Pop-up menu

Position of waveform

record relative to

the screen and display

General purpose

knob readout

Side menu area. Readouts for measurements move here when CLEAR MENU is pressed.

Figure 4–1: Map of Display Functions

Main menu display area. Readouts in lower graticule

area move here when CLEAR MENU is pressed.

TDS 510A Service Manual

4–3

Performance Verification Procedures

4–4

TDS 510A Service Manual

Brief Procedures

Self Tests

The Self Tests use internal routines to confirm basic functionality and proper adjustment. No test equipment is required to do these test procedures.

The Functional Tests utilize the probe-compensation output at the front panel as a test-signal source for further verifying that the oscilloscope functions properly. A probe, such as the P6139A, is required to do these test procedures.

This procedure uses internal routines to verify that the oscilloscope functions and was adjusted properly. No test equipment or hookups are required.

Verify Internal Adjustment,

Self Compensation, and

Diagnostics

Equipment Required

Prerequisites See page 4–15.

1. Verify that internal diagnostics pass: Do the following substeps to verify

passing of internal diagnostics.

a. Display the System diagnostics menu:

H Press SHIFT; then press UTILITY. H Repeatedly press the main-menu button System until Diag/Err is

highlighted in the pop-up menu.

b. Run the System Diagnostics:

H First disconnect any input signals from all four channels. H Press the main-menu button Execute; then press the side-menu

button OK Confirm Run Test.

c. Wait: The internal diagnostics do an exhaustive verification of proper

oscilloscope function. This verification will take up to three and a half minutes. At some time during the wait, a “clock” icon (shown at left) will appear on-screen. When the verification is finished, the resulting status will appear on the screen.

None

TDS 510A Service Manual

d. Confirm no failures are found: Verify that no failures are found and

reported on-screen.

e. Confirm the three adjustment sections have passed status:

4–5

Brief Procedures

H Press SHIFT; then press UTILITY. H Highlight Cal in the pop-up menu by repeatedly pressing the

main-menu button System. See Figure 4–2.

H Verify that the word Pass appears in the main menu under the

following menu labels: Voltage Reference, Frequency Response, and Pulse Trigger. See Figure 4–2.

f. Run the signal-path compensation: Press the main-menu button Signal

Path; then press the side-menu button OK Compensate Signal Paths.

g. Wait: Signal-path compensation may take five minutes to run. While it

progresses, a “clock” icon (shown at left) is displayed on-screen. When compensation completes, the status message will be updated to Pass or Fail in the main menu. See step h.

h. Confirm signal-path compensation returns passed status: Verify that the

word Pass appears under Signal Path in the main menu. See Figure 4–2.

4–6

Highlight Cal

Verify Pass

Figure 4–2: Verifying Adjustments and Signal-Path Compensation

2. Return to regular service: Press CLEAR MENU to exit the system menus.

TDS 510A Service Manual

Functional Tests

Brief Procedures

The purpose of these procedures is to confirm that the oscilloscope functions properly. The only equipment required is one of the standard-accessory probes and, to check the file system, a 3.5 inch, 720 K or 1.44 Mbyte floppy disk.

STOP. These procedures verify functions; that is, they verify that the oscilloscope features operate. They do not verify that they operate within limits.

Therefore, when the instructions in the functional tests that follow call for you to verify that a signal appears on-screen “that is about five divisions in amplitude” or “has a period of about six horizontal divisions,” etc., do NOT interpret the quantities given as limits. Operation within limits is checked in Performance Tests, which begin on page 4–15.

STOP. DO NOT make changes to the front-panel settings that are not called out in the procedures. Each verification procedure will require you to set the oscilloscope to certain default settings before verifying functions. If you make changes to these settings, other than those called out in the procedure, you may obtain invalid results. In this case, just redo the procedure from step 1.

Verify All Input Channels

When you are instructed to press a menu button, the button may already be selected (its label will be highlighted). If this is the case, it is not necessary to press the button.

Equipment Required

Prerequisites None

1. Install the test hookup and preset the oscilloscope controls: a. Hook up the signal source: Install the probe on CH 1. Connect the probe

tip to PROBE COMPENSATION SIGNAL on the front panel; connect the probe ground (typically black) to PROBE COMPENSA- TION GND. If using a P6243 or P6245 probe, you may want to attach a Y-lead connector and two SMD KlipChips as shown in Figure 4–3.

One probe such as the P6243, P6245 or P6139A

TDS 510A Service Manual

4–7

Brief Procedures

Signal Gnd

Figure 4–3: Universal T est Hookup for Functional Tests

b. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init.

2. Verify that all channels operate: Do the following substeps — test CH 1

first, skipping substep a and b since CH 1 is already set up for verification

and as the trigger source from step 1. a. Select an unverified channel:

H Press WAVEFORM OFF to remove the channel just verified from

display.

H Press the front-panel button that corresponds to the channel you are

to verify.

H Move the probe to the channel you selected.

b. Match the trigger source to the channel selected:

4–8

H Press TRIGGER MENU.

TDS 510A Service Manual

Brief Procedures

H Press the main-menu button Source. H Press the side-menu button that corresponds to the channel selected

(Ch2, Ch3, or Ch4).

c. Set up the selected channel:

H Set the vertical SCALE to 200 mV. H Set the horizontal SCALE to 200 ms. Press CLEAR MENU to

remove any menu that may be on the screen.

H Press SET LEVEL TO 50%.

d. Verify that the channel is operational: Confirm that the following

statements are true. H The vertical scale readout for the channel under test shows a setting

of 200 mV, and a square-wave probe-compensation signal about

2.5 divisions in amplitude is on-screen. See Figure 4–1 on page 4–3 to locate the readout.

H The vertical POSITION knob moves the signal up and down the

screen when rotated.

H Turning the vertical SCALE knob counterclockwise decreases the

amplitude of the waveform on-screen, turning the knob clockwise increases the amplitude, and returning the knob to 200 mV returns the amplitude to about 2.5 divisions.

e. Verify that the channel acquires in all acquisition modes: Press SHIFT;

then press ACQUIRE MENU. Use the side menu to select, in turn, each of the three hardware acquire modes and confirm that the following statements are true. Refer to the icons at the left of each statement as you confirm those statements.

H Sample mode displays an actively acquiring waveform on-screen.

(Note that there is noise present on the peaks of the square wave.)

H Peak Detect mode displays an actively acquiring waveform

on-screen with the noise present in Sample mode “peak detected.”

H Hi Res mode displays an actively acquiring waveform on-screen

with the noise that was present in Sample mode reduced.

H Envelope mode displays an actively acquiring waveform on-screen

with the noise displayed.

TDS 510A Service Manual

H Average mode displays an actively acquiring waveform on-screen

with the noise reduced.

f. Test all channels: Repeat substeps a through e until all four input

channels are verified.

4–9

Brief Procedures

3. Remove the test hookup: Disconnect the probe from the channel input and

the probe-compensation terminals.

Verify the Time Base

Equipment Required

Prerequisites None

One probe such as the P6243, P6245 or P6139A

1. Install the test hookup and preset the oscilloscope controls: a. Hook up the signal source: Install the probe on CH 1. Connect the probe

tip to PROBE COMPENSATION SIGNAL on the front panel; connect the probe ground to PROBE COMPENSATION GND. See Figure 4–3 on page 4–8.

b. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup; then press the

side-menu button OK Confirm Factory Init.

c. Modify default settings:

H Set the vertical SCALE to 200 mV. H Set the horizontal SCALE to 200 ms. H Press SET LEVEL TO 50%. H Press CLEAR MENU to remove the menus from the screen.

2. Verify that the time base operates: Confirm the following statements. a. One period of the square-wave probe-compensation signal is about five

horizontal divisions on screen for the 200 ms horizontal scale setting (set in step 1c).

b. Rotating the horizontal SCALE knob clockwise expands the waveform

on-screen (more horizontal divisions per waveform period), counterclockwise rotation contracts it, and returning the horizontal scale to 200 ms returns the period to about five divisions.

c. The horizontal POSITION knob positions the signal left and right on

screen when rotated.

3. Remove the test hookup: Disconnect the probe from the channel input and the probe-compensation terminals.

4–10

TDS 510A Service Manual

Brief Procedures

Verify the Main and

Delayed Trigger Systems

Equipment Required

Prerequisites None

One probe such as the P6243, P6245, or P6139A

1. Install the test hookup and preset the oscilloscope controls: a. Hook up the signal source: Install the probe on CH 1. Connect the probe

tip to PROBE COMPENSATION SIGNAL on the front panel; connect the probe ground to PROBE COMPENSATION GND. See Figure 4–3 on page 4–8.

b. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init.

c. Modify default settings:

H Set the vertical SCALE to 200 mV. H Set the horizontal SCALE for the M (main) time base to 200 ms. H Press SET LEVEL TO 50%. H Press TRIGGER MENU. H Press the main-menu button Mode & Holdoff. H Press the side-menu button Normal. H Press CLEAR MENU to remove the menus from the screen.

2. Verify that the main trigger system operates: Confirm that the following statements are true:

H The trigger level readout for the main trigger system changes with the

trigger-LEVEL knob.

H The trigger-LEVEL knob can trigger and untrigger the square-wave

signal as you rotate it. (Leave the signal untriggered, which is indicated by the display not updating.)

H Pressing SET LEVEL TO 50% triggers the signal that you just left

untriggered. (Leave the signal triggered.)

TDS 510A Service Manual

4–11

Brief Procedures

3. Verify that the delayed trigger system operates: a. Select the delayed time base:

H Press HORIZONTAL MENU. H Press the main-menu button Time Base. H Press the side-menu button Delayed Triggerable; then press the

side-menu button Delayed Only.

H Set the horizontal SCALE for the D (delayed) time base to 200 ms.

b. Select the delayed trigger level menu:

H Press SHIFT; then press DELAYED TRIG. H Press the main-menu button Level; then press the side-menu button

Level.

c. Confirm that the following statements are true:

H The trigger-level readout for the delayed trigger system changes as

you turn the general purpose knob.

H As you rotate the general purpose knob, the square-wave probe-com-

pensation signal can become triggered and untriggered. (Leave the signal untriggered, which is indicated by the display not updating.)

H Pressing the side-menu button Set to 50% triggers the probe-com-

pensation signal that you just left untriggered. (Leave the signal triggered.)

d. Verify the delayed trigger counter:

H Press the main-menu button Delay by Time. H Use the keypad to enter a delay time of 1 second. Press 1, then press

ENTER.

H Verify that the trigger READY indicator on the front panel flashes

about once every second as the waveform is updated on-screen.

4. Remove the test hookup: Disconnect the probe from the channel input and the probe-compensation terminals.

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TDS 510A Service Manual

Brief Procedures

Verify the File System

Equipment Required

Prerequisites None

One probe such as the P6243, P6245 or P6139A One 720 K or 1.44 Mbyte, 3.5 inch DOS-compatible disk.

1. Install the test hookup and preset the oscilloscope controls: a. Hook up the signal source: Install the probe on CH 1. Connect the probe

tip to PROBE COMPENSATION SIGNAL on the front panel; connect the probe ground to PROBE COMPENSATION GND. See Figure 4–3 on page 4–8.

b. Insert the test disk: Insert the disk in the disk drive to the left of the

monitor.

H Position the disk so the metal shutter faces the drive. H Position the disk so the stamped arrow is on the top right side. In

other words, place the angled corner in the front bottom location.

H Push the disk into the drive until it goes all the way in and clicks

into place.

c. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init.

d. Modify default settings:

H Set the vertical SCALE to 200 mV. H Set the horizontal SCALE for the M (main) time base to 200 ms.

Notice the waveform on the display now shows two cycles instead of five.

H Press SET LEVEL TO 50%. H Press CLEAR MENU to remove the menus from the screen.

e. Save the settings:

H Press SETUP. H Press the main-menu button Save Current Setup; then press the

side-menu button To File.

H Turn the general purpose knob to select the file to save. Choose

 (or ). With this choice, you will save a file starting with , then containing 5-numbers, and a  extension.

TDS 510A Service Manual

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Brief Procedures

For example, the first time you run this on a blank, formatted disk or on the Example Programs Disk, the oscilloscope will assign the name  to your file. If you ran the procedure again, the oscilloscope would increment the name and call the file .

H Press the side-menu button Save To Selected File.

2. Verify the file system works:

H Press the main-menu button Recall Factory Setup and the side-menu

button OK Confirm Factory Init to restore the 500 ms time base and the five cycle waveform.

H Press the main-menu button Recall Saved Setup; then press the

side-menu button From File.

H Turn the general purpose knob to select the file to recall. For example, if

you followed the instructions above and used a blank disk, you had the oscilloscope assign the name TEK00000.SET to your file.

H Press the side-menu button Recall From Selected File. H Verify that oscilloscope retrieved the saved setup from the disk. Do this

by noticing the horizontal SCALE for the M (main) time base is again 200 ms and the waveform shows only two cycles just as it was when you saved the setup.

3. Remove the test hookup:

H Disconnect the probe from the channel input and the probe-compensa-

tion terminals.

H Remove the disk from the disk drive. Do this by pushing in the tab of

the disk drive.

4–14

TDS 510A Service Manual

Performance Tests

This section contains a collection of procedures for checking that the TDS 510A Digitizing Oscilloscope performs as warranted.

The procedures are arranged in four logical groupings: Signal Acquisition System

Checks, Time Base System Checks, Triggering System Checks, and Output Ports Checks. They check all the characteristics that are designated as checked in Specifications. (The characteristics that are checked appear in boldface type under Warranted Characteristics in Specifications.)

STOP. These procedures extend the confidence level provided by the basic procedures described on page 4–5. The basic procedures should be done first, then these procedures performed if desired.

Prerequisites

The tests in this section comprise an extensive, valid confirmation of performance and functionality when the following requirements are met:

H The cabinet must be installed on the oscilloscope. H You must have performed and passed the procedures under Self Tests, found

on page 4–5, and those under Functional Tests, found on page 4–7.

H A signal-path compensation must have been done within the recommended

calibration interval and at a temperature within ±5_ C of the present operating temperature. (If at the time you did the prerequisite Self Tests, the temperature was within the limits just stated, consider this prerequisite met.)

H The oscilloscope must have been last adjusted at an ambient temperature

between +20_ C and +30_ C, must have been operating for a warm-up period of at least 20 minutes, and must be operating at an ambient temperature between +5_ C and +50_ C. (The warm-up requirement is usually met in the course of meeting the Self Tests and Functional Tests prerequisites listed above.)

TDS 510A Service Manual

4–15

Performance Tests

Equipment Required

T able 4–1: Test Equipment

Item Number and Description

These procedures use external, traceable signal sources to directly check warranted characteristics. The required equipment list follows this introduction.

Minimum Requirements Example Purpose

1. Attenuator ,10X (two required)

2. Attenuator , 5X Ratio: 5X; impedance 50 W;

3. Adapter, BNC female to Clip Leads

4. Terminator, 50 W Impedance 50 W; connectors: female

5. Cable, Precision 50 W Coaxial (two required)

6. Connector , Dual-Banana (two required)

7. Connector , BNC “T” Male BNC to dual female BNC Tektronix part number

8. Coupler, Dual-Input Female BNC to dual male BNC Tektronix part number

9. Generator , DC Calibration

10. Generator, Calibration 500 mV square wave calibrator

11. Generator, T ime Mark Variable marker frequency from 10 ms

12. Probe, 10X A P6139A, P6243, or P6245 probe

13. 3.5 inch, 720 K or

1.44 Mbyte, DOScompatible floppy disk

14. Generator, Video Signal Provides PAL compatible outputs Tektronix TSG 121 Used to Test Video Option 05

15. Oscillator, Leveled Sine wave Generator

Ratio: 10X; impedance 50 W; connectors: female BNC input, male BNC output

connectors: female BNC input, male BNC output

BNC female to Clip Leads Tektronix part number

BNC input, male BNC output 50 W, 36 in, male to male BNC

connectors Female BNC to dual banana Tektronix part number

Variable amplitude to ±104 V; accuracy to 0.1%

amplitude; accuracy to 0.25%

to 10 ns; accuracy within 2 ppm

3.5 inch, 720 K or 1.44 Mbyte, DOS-compatible floppy disk

60 Hz Sine wave Wavetek 9100 with options

Tektronix part number 01 1-0059-02

Tektronix part number 01 1-0060-02

013-0076-00 Tektronix part number

01 1-0049-01 Tektronix part number

012-0482-00

103-0090-00

103-0030-00

067-0525-02 Data Precision 8200 Checking DC Offset, Gain,

Wavetek 9100 with options 100 and 250 (or, optionally, Tektronix PG 506A1 )

Wavetek 9100 with options 100 and 250 (or, optionally, Tektronix TG 501A Time Mark Generator

Tektronix part number P6139A or P6245

100 and 250 (or, optionally, Tektronix SG 502)

Signal Attenuation

Signal Coupling for Probe Compensator Output Check

Signal Termination for Channel Delay Test

Signal Interconnection

Various Accuracy Tests

Checking Trigger Sensitivity

Checking Delay Between Channels

and Measurement Accuracy To check accuracy of CH 3

Signal Out

Checking Sample-Rate and Delay-time Accuracy

Signal Interconnection

Checking File System Basic Functionality

Equipped Instruments Only Used to Test Video Option 05

Equipped Instruments Only

4–16

TDS 510A Service Manual

T able 4–1: Test Equipment (Cont.)

Item Number and Description

Performance Tests

PurposeExampleMinimum Requirements

16. Pulse Generator Tektronix CFG280 (or, optionally, PG 502)

17. Cable, Coaxial

(two required)

18. Terminator, 75 W

(two required)

19. Generator, Sine Wave 100 kHz to at least 400 MHz. Variable

75 W, 36 in, male to male BNC connectors

Impedance 75 W; connectors: female BNC input, male BNC output

amplitude from 12 mV to 2 V

p-p

Tektronix part number 012-1338-00

Tektronix part number 01 1-0102-01

Rohde & Schwarz SMY

Frequency accuracy >2.0%

Used to Test Video Option 05 Equipped Instruments Only

Checking Analog Bandwidth, Trigger Sensitivity , Samplerate, External Clock, and Delay-Time Accuracy

20. Meter, Level and Power

Sensor

21. Splitter, Power Frequency range: DC to 1 GHz.

Frequency range:10 MHz to 400MHz. Amplitude range: 6 mVp-p to 2 V

p-p

Rohde & Schwarz URV 35, with NRV-Z8 power sensor

Rohde & Schwarz RVZ

Checking Analog Bandwidth

and Trigger Sensitivity Checking Analog Bandwidth

Tracking: >2.0%

22. Generator, Function Frequency range 5 MHz to 10 MHz.

T ektronix CFG280 Checking External Clock

Square wave transition time v25 ns. Amplitude range: 0 to 10 V

p-p

into 50 W

23. Adapter (four required) Male N to female BNC T ektronix 103–0045–00 Checking Analog Bandwidth

24. Adapter Female N to male BNC T ektronix 103–0058–00 Checking Analog Bandwidth

25. Generator,

Leveled Sine Wave,

200 kHz to 250 MHz; Variable amplitude from 5 mV to 4 V

into 50 W

p-p

Tektronix SG 503 Leveled Sine Wave Generator

1, 3

Checking Trigger Sensitivity

at low frequencies Medium-Frequency (optional)

26. Generator, Leveled Sine Wave, High-Frequency (optional)

Requires a TM 500 or TM 5000 Series Power Module Mainframe.

Warning: The optional P6243 and P6245 probes that may be used with this oscilloscope provide an extremely low loading

250 MHz to 1 GHz; Variable amplitude from 500 mV to 4 V

into 50 W;

p-p

6 MHz reference

Tektronix SG 504 Leveled Sine Wave Generator SG 504 Output Head

with

Checking Analog Bandwidth and Trigger Sensitivity at high frequencies

capacitance (<1 pF) to ensure the best possible signal reproduction. These probes should not be used to measure signals exceeding ±8 V , or errors in signal measurement will be observed. Above 40 V, damage to the probe may result. To make measurements beyond ±8 V, use either the P6139A probe (good to 500 V), or refer to the catalog for a recommended probe.

You can replace items 19, 20, or 21 with a Tektronix SG503 (item 25) or SG504 (item 26) – if available.

TDS 510A Service Manual

4–17

Performance Tests

4–18

TDS 510A Service Manual

Performance Tests

TDS 510A Test Record

Photocopy this and the next three pages and use them to record the performance test results for your TDS 510A Digitizing Oscilloscope.

T est Record

Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test Minimum Incoming Outgoing Maximum

Offset Accuracy CH1 Offset +1 mV

+101 mV +1.01 V

CH2 Offset +1 mV

+101 mV +1.01 V

CH3 Offset +1 mV

+101 mV +1.01 V

CH4 Offset +1 mV

+101 mV

+1.01 V DC Voltage Measurement Accuracy (Averaged) CH1 5 mV Vert scale setting,

–5 Div position setting, +1 V offset

CH1 5 mV Vert scale setting,

+5 Div position setting, –1 V offset

CH1 200 mV Vert scale setting,

–5 Div position setting, +10 V offset

CH1 200 mV Vert scale setting,

+5 Div position setting, –10 V offset

CH1 1 V Vert scale setting,

–5 Div position setting, +10 V offset

CH1 1 V Vert scale setting,

+5 Div position setting, –10 V offset

CH2 5 mV Vert scale setting,

–5 Div position setting, +1 V offset

CH2 5 mV Vert scale setting,

+5 Div position setting, –1 V offset

CH2 200 mV Vert scale setting,

–5 Div position setting, +10 V offset

– 1.6 mV – 25.1 mV – 251 mV

+ 1.0355 V __________ __________ + 1.0445 V

– 1.0445 V __________ __________ – 1.0355 V

+ 11.5085 V __________ __________ + 11.6915 V

– 11.6915 V __________ __________ – 11.5085 V

+ 17.6075 V __________ __________ + 18.3925 V

– 18.3925 V __________ __________ – 17.6075 V

+ 1.0355 V __________ __________ + 1.0445V

– 1.0445 V __________ __________ – 1.0355 V

+ 11.5085 V __________ __________ + 11.6915 V

__________ __________ __________

+ 1.6 mV + 25.1 mV + 251 mV

TDS 510A Service Manual

4–19

Performance Tests

Test Record (Cont.)

Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimum

CH2 200 mV Vert scale setting,

+5 Div position setting, –10 V offset

CH2 1 V Vert scale setting,

–5 Div position setting, +10 V offset

CH2 1 V Vert scale setting,

+5 Div position setting, –10 V offset

CH3 5 mV Vert scale setting,

–5 Div position setting, +1 V offset

CH3 5 mV Vert scale setting,

+5 Div position setting, –1 V offset

CH3 200 mV Vert scale setting,

–5 Div position setting, +10 V offset

CH3 200 mV Vert scale setting,

+5 Div position setting, –10 V offset

CH3 1 V Vert scale setting,

–5 Div position setting, +10 V offset

CH3 1 V Vert scale setting,

+5 Div position setting, –10 V offset

CH4 5 mV Vert scale setting,

–5 Div position setting, +1 V offset

CH4 5 mV Vert scale setting,

+5 Div position setting, –1 V offset

CH4 200 mV Vert scale setting,

–5 Div position setting, +10 V offset

CH4 200 mV Vert scale setting,

+5 Div position setting, –10 V offset

CH4 1 V Vert scale setting,

–5 Div position setting, +10 V offset

CH4 1 V Vert scale setting,

+5 Div position setting, –10 V offset Analog Bandwidth CH1 100 mV 424 mV __________ __________ N/A CH2 100 mV 424 mV __________ __________ N/A CH3 100 mV 424 mV __________ __________ N/A CH4 100 mV 424 mV __________ __________ N/A

– 11.6915 V __________ __________ – 11.5085 V

+ 17.6075 V __________ __________ + 18.3925 V

– 18.3925 V __________ __________ – 17.6075 V

+ 1.0355 V __________ __________ + 1.0445 V

– 1.0445 V __________ __________ – 1.0355 V

+ 11.5085 V __________ __________ + 11.6915 V

– 11.6915 V __________ __________ – 11.5085 V

+ 17.6075 V __________ __________ + 18.3925 V

– 18.3925 V __________ __________ – 17.6075 V

+ 1.0355 V __________ __________ + 1.0445 V

– 1.0445 V __________ __________ – 1.0355 V

+ 11.5085 V __________ __________ + 11.6915 V

– 11.6915 V __________ __________ – 11.5085 V

+ 17.6075 V __________ __________ + 18.3925 V

– 18.3925 V __________ __________ – 17.6075 V

4–20

TDS 510A Service Manual

Performance Tests

Test Record (Cont.)

Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimum

Delay Between Channels Delay Between Channels N/A __________ __________ 250 ps Time Base System Long Term Sample Rate/

Delay Time @ 100 ns/10.0 ms Trigger System Accuracy Pulse-Glitch or Pulse-Width,

Hor. scale ≤ 1 ms

Lower Limit Upper Limit

Pulse-Glitch or Pulse-Width, Hor. scale > 1 ms

Lower Limit

Upper Limit Main Trigger, DC Coupled, Positive Slope 9.940 V __________ __________ 10.060 V Main Trigger, DC Coupled, Negative Slope 9.940 V __________ __________ 10.060 V Delayed Trigger, DC Coupled, Positive Slope 9.940 V __________ __________ 10.060 V Delayed Trigger, DC Coupled, Negative Slope 9.940 V __________ __________ 10.060 V CH1 Sensitivity, 50 MHz, Main Pass/Fail __________ __________ Pass/Fail CH1 Sensitivity , 50 MHz, Delayed Pass/Fail __________ __________ Pass/Fail CH1 AUX Trigger Input Pass/Fail __________ __________ Pass/Fail CH1 Sensitivity , full bandwidth, Main Pass/Fail __________ __________ Pass/Fail CH1 Sensitivity , full bandwidth, Delayed Pass/Fail __________ __________ Pass/Fail Output Signal Checks MAIN TRIGGER OUTPUT, 1 MW

High

Low MAIN TRIGGER OUTPUT, 50 W

High

Low DELA YED TRIGGER OUTPUT, 50 W

High

Low DELA YED TRIGGER OUTPUT, 1 MW

High

Low

–2.5 Div __________ __________ +2.5 Div

2.5 ns

1.0 ms

High ≥ 2.5 V __________

High ≥ 1.0 V __________

High ≥ 2.5 V __________

__________ __________

__________

__________ __________

__________ __________ Low ≤ 0.25 V

__________ __________ Low ≤ 0.7 V

7.5 ns

3.0 ms

Low ≤ 0.7 V

TDS 510A Service Manual

4–21

Performance Tests

Test Record (Cont.)

Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician:

Performance Test MaximumOutgoingIncomingMinimum

CH 3 or AX 1 SIGNAL OUTPUT, 1 MW Pk-Pk ≥ 90 mV __________ __________ Pk-Pk ≤ 110 mV CH 3 or AX 1 SIGNAL OUTPUT, 50 W Pk-Pk ≥ 45 mV __________ __________ Pk-Pk ≤ 55 mV Probe Compensator Output Signal Frequency (CH1 Freq.) 950 Hz __________ __________ 1.050 kHz Voltage (difference) 495 mV __________ __________ 505 mV

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TDS 510A Service Manual

Signal Acquisition System Checks

These procedures check those characteristics that relate to the signal-acquisition system and are listed as checked under Warranted Characteristics in Specifica-

tions.

Performance Tests

Check Offset Accuracy

(Zero Setting)

Equipment Required

Prerequisites See page 4–15.

1. Preset the instrument controls: a. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init. H Press CLEAR MENU to remove the menus from the screen.

b. Modify the default settings:

H Press SHIFT; then press ACQUIRE MENU. H Press the main-menu button Mode; then press the side-menu button

Hi Res.

H Press CURSOR.

None

TDS 510A Service Manual

H Press the main-menu button Function; then press the side-menu

button H Bars.

H Press CLEAR MENU. H Be sure to disconnect any input signals from all four channels.

2. Confirm input channels are within limits for offset accuracy at zero offset:

Do the following substeps — test CH 1 first, skipping substep a. since CH 1 is already set up to be checked from step 1.

a. Select an unchecked channel: Press WAVEFORM OFF to remove the

channel just confirmed from the display. Then, press the front-panel button that corresponds to the channel you are to confirm.

b. Set the vertical scale: Set the vertical SCALE to one of the settings

listed in Table 4–2 that is not yet checked. (Start with the first setting listed.)

4–23

Performance Tests

H Press VERTICAL MENU. Press the main-menu button Fine Scale. H Use the keypad to enter the vertical scale. For the 1 mV setting,

press 1, SHIFT, m, then ENTER. For the 101 mV setting, press 101, SHIFT, m, and then ENTER. For the 1.01 V setting, press

1.01 and then ENTER.

H Press CLEAR MENU.

T able 4–2: DC Offset Accuracy (Zero Setting)

Vertical Vertical Scale Setting

1 mV 0 ±1.6 mV 101 mV 0 ±25.1 mV

1.01 V 0 ±251 mV

Vertical position is set to 0 divisions and vertical offset to step 1.

Position and

Offset Setting

0 V when the oscilloscope is initialized in

Offset Accuracy

Limits

c. Display the test signal: The waveform position and offset were

initialized for all channels in step 1 and are displayed as you select each channel and its vertical scale.

d. Measure the test signal: Align the active cursor over the waveform by

rotating the general purpose knob. Ignore the other cursor. See Figure 4–4.

e. Read the measurement results at the absolute (@:) cursor readout, not

the delta (D:) readout on screen. That is, read the offset relative to the ground reference. See Figure 4–4.

f. Check against limits: Do the following subparts in the order listed.

H CHECK that the measurement results are within the limits listed for

the current vertical scale setting.

H Enter voltage on test record. H Repeat substeps b through f until all vertical scale settings listed in

Table 4–2, are checked for the channel under test.

4–24

TDS 510A Service Manual

Read the measurement

results.

Align the active cursor

over the waveform.

Performance Tests

Check DC Voltage

Measurement Accuracy

Figure 4–4: Measurement of DC Offset Accuracy at Zero Setting

g. Test all channels: Repeat substeps a through f for all input channels.

3. Disconnect the hookup: No hookup was required.

WARNING. The generator is capable of outputting dangerous voltages. Be sure to set the DC calibration generator to 0 volts before connecting, disconnecting, and/or moving the test hookup during the performance of this procedure.

Equipment Required

Prerequisites The oscilloscope must meet the prerequisites listed on page 4–15

Two dual-banana connectors (Item 6) One BNC T connector (Item 7) One DC calibration generator (Item 9) Two precision coaxial cables (Item 5)

TDS 510A Service Manual

4–25

Performance Tests

1. Install the test hookup and preset the instrument controls: a. Hook up the test-signal source:

H Set the output of a DC calibration generator to 0 volts. H Connect the output of a DC calibration generator through a

dual-banana connector followed by a 50 W precision coaxial cable to one side of a BNC T connector. See Figure 4–5.

H Connect the Sense output of the generator through a second

dual-banana connector followed by a 50 W precision coaxial cable to the other side of the BNC T connector. Now connect the BNC T connector to CH 1. See Figure 4–5.

Output Sense

DC Calibrator

Dual Banana to

BNC Adapters

Figure 4–5: Initial Test Hookup

b. Initialize the oscilloscope:

H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init.

c. Modify the default settings:

50 W Coaxial Cables

Digitizing Oscilloscope

BNC T

Connector

4–26

H Press SHIFT; then press ACQUIRE MENU. H Press the main-menu button Mode; then press the side-menu button

Average 16.

2. Confirm input channels are within limits for DC accuracy at maximum offset

and position: Do the following substeps — test CH 1 first, skipping substep 2a since CH 1 is already selected from step 1.

TDS 510A Service Manual

Performance Tests

a. Select an unchecked channel:

H Press WAVEFORM OFF to remove the channel just confirmed

from the display.

H Press the front-panel button that corresponds to the channel you are

to confirm.

H Set the generator output to 0 V. H Move the test hookup to the channel you selected.

b. Turn on the measurement Mean for the channel:

H Press MEASURE, then press the main-menu button Select

Measrmnt for CHx.

H Press the side-menu button more until the menu label Mean appears

in the side menu (its icon is shown at the left). Press the side-menu button Mean.

H Press CLEAR MENU.

c. Set the vertical scale: Set the vertical SCALE to one of the settings

listed in Table 4–3 that is not yet checked. (Start with the first setting listed.)

T able 4–3: DC Voltage Measurement Accuracy

Position Scale Setting

5 mV –5 +1 V +1.040 V +1.0355 V to +1.0445 V

200 mV –5 +10 V +11.6 V +11.5085 V to +1 1.6915 V

1 V –5 +10 V +18V +17.6075 V to +18.3925 V

Setting

(Divs)

+5 V –1 V –1.040 V –1.0445 V to –1.0355 V

+5 –10 V –1 1.6 V –11.6915 V to –1 1.5085 V

+5 –10 V –18 V –18.3925 V to –17.6075 V

Offset Setting

Generator Setting

Accuracy Limits

d. Display the test signal:

TDS 510A Service Manual

H Press VERTICAL MENU. Press the main-menu button Position. H Use the keypad to set vertical position to –5 divisions (press –5, then

ENTER, on the keypad). The baseline level will move off screen.

H Press the main-menu button Offset.

4–27

Performance Tests

measurement called

mean and read the

H Use the keypad to set vertical offset to the positive-polarity setting

listed in the table for the current vertical scale setting. The baseline level will remain off screen.

H Set the generator to the level and polarity indicated in the table for

the vertical scale, position, and offset settings you have made. The DC test level should appear on screen. (If it doesn’t return, the DC accuracy check is failed for the current vertical scale setting of the current channel.)

e. Measure the test signal: Press CLEAR MENU. Read the measurement

results at the Mean measurement readout. See Figure 4–6.

Turn on the

results here.

4–28

Figure 4–6: Measurement of DC Accuracy at Maximum Offset and Position

f. Check against limits:

H CHECK that the readout for the measurement Mean readout on

screen is within the limits listed for the current vertical scale and position/offset/generator settings. Enter value on test record.

H Repeat substep d, reversing the polarity of the position, offset, and

generator settings as is listed in the table.

H CHECK that the Mean measurement readout on screen is within the

limits listed for the current vertical scale setting and position/offset/ generator settings. Enter the value on test record.

TDS 510A Service Manual

Tektronix TDS 510A Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Service Manual

Table of Contents

Specifications

Operating Information

Theory of Operation

Performance Verification

Adjustment Procedures

Maintenance

Options

Electrical Parts List

Diagrams

Mechanical Parts List

List of Figures

List of Tables

General Safety Summary

Service Safety Summary

Preface

Manual Structure

Manual Conventions

Related Manuals

Introduction

Service Strategy

Service Offerings

Before You Begin

Specifications

General Product Description

User Interface

Signal Acquisition System

Horizontal System

Trigger System

Acquisition Control

On-Board User Assistance

Measurement Assistance

Storage and I/O

Display and Zoom

Nominal Traits

W arranted Characteristics

Performance Conditions

Typical Characteristics

Installation

Supplying Operating Power

Operating Environment

Applying and Interrupting Power

Repackaging Instructions

Installed Options

Operating Instructions

Screen Layout

Basic Procedures

Circuit Description

Logic Conventions

Module Overview

Performance Verification Procedures

Conventions

Brief Procedures

Self Tests

Functional Tests

Performance Tests

Prerequisites

Equipment Required

TDS 510A Test Record

Signal Acquisition System Checks