Tektronix TDS 694C User Manual
User Manual
TDS 694C
Digital Real-Time Oscilloscope
071-0473-00
This document supports firmware version 1.0 and
above.
Copyright © T ektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at F AR 52.227-19, as applicable.
T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
T ektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years
from the date of shipment. If any such product proves defective during this warranty period, 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; or c) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time or
difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUST OMER FOR BREACH OF THIS WARRANTY. TEKTRONIX
AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT , SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
Getting Started
Operating Basics
General Safety Summary ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conventions xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 694C Features 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Specification 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Up 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Putting into Service 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Interface Maps 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tutorial 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 1: Displaying a Waveform 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 2: Displaying Multiple Waveforms 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example 3: T aking Automated Measurements 2–20. . . . . . . . . . . . . . . . . . . . . . . . . .
Example 4: Saving Setups 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference
Overview 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquiring and Displaying Waveforms 3–5. . . . . . . . . . . . . . . . . . . . . . . . .
Coupling Waveforms to the Oscilloscope 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting up Automatically: Autoset and Reset 3–6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Channels 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scaling and Positioning Waveforms 3–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Choosing an Acquisition Mode 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customizing the Display 3–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customizing the Display Color 3–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Zooming on Waveforms 3–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on Waveforms 3–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Concepts 3–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering from the Front Panel 3–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on a Waveform Edge 3–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering Based on Logic 3–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triggering on Pulses 3–69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Triggering 3–82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measuring Waveforms 3–89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T aking Automated Measurements 3–90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T aking Cursor Measurements 3–100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents
T aking Graticule Measurements 3–105. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Histograms 3–106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optimizing Measurement Accuracy: SPC and Probe Cal 3–110. . . . . . . . . . . . . . . . . .
Saving Waveforms and Setups 3–117. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Saving and Recalling Setups 3–117. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Saving and Recalling Waveforms and Acquisitions 3–120. . . . . . . . . . . . . . . . . . . . . .
Managing the File System 3–124. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printing a Hardcopy 3–129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communicating with Remote Instruments 3–139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Determining Status and Accessing Help 3–143. . . . . . . . . . . . . . . . . . . . . . . .
Displaying Status 3–143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying the Banner 3–145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Help 3–145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Features for Advanced Applications 3–147. . . . . . . . . . . . . . . . . . . . . .
Limit Testing 3–147. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Math 3–152. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fast Fourier Transforms 3–155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Differentiation 3–174. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Integration 3–179. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
Glossary
Index
Appendix A: Options and Accessories A–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Algorithms B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C: Packaging for Shipment C–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix D: Probe Selection D–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix E: Inspection and Cleaning E–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix F: Programmer Disk F–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 694C User Manual
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List of Figures
Table of Contents
Figure 1–1: Rear Panel Controls Used in Start Up 1–7. . . . . . . . . . . . . . .
Figure 1–2: ON/STBY Button 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1: Deskew Fixture Connections
(two P6249 probes shown) 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2: Connecting a Probe for the Examples
(P6249 shown) 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–3: SETUP Button Location 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4: The Setup Menu 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: Trigger Controls 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–6: The Display After Factory Initialization 2–13. . . . . . . . . . . . .
Figure 2–7: The VERTICAL and HORIZONTAL Controls 2–14. . . . . . .
Figure 2–8: TRIGGER Controls 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–9: AUTOSET Button Location 2–16. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–10: The Display After Pressing Autoset 2–16. . . . . . . . . . . . . . . .
Figure 2–11: The Channel Buttons and Lights 2–17. . . . . . . . . . . . . . . . . . .
Figure 2–12: The Vertical Main Menu and Coupling
Side Menu 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–13: The Menus After Changing Channels 2–20. . . . . . . . . . . . . .
Figure 2–14: Measure Main Menu and Select Measurement
Side Menu 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–15: Four Simultaneous Measurement Readouts 2–23. . . . . . . . .
Figure 2–16: General Purpose Knob Indicators 2–24. . . . . . . . . . . . . . . . .
Figure 2–17: Snapshot of Channel 1 2–26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–18: Save/Recall Setup Menu 2–27. . . . . . . . . . . . . . . . . . . . . . . . . .
TDS 694C User Manual
Figure 3–1: The Channel Readout 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–2: Waveform Selection Priority 3–9. . . . . . . . . . . . . . . . . . . . . . .
Figure 3–3: Scaling and Positioning 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–4: Vertical Readouts and Channel Menu 3–12. . . . . . . . . . . . . . .
Figure 3–5: Record View and Time Base Readouts 3–14. . . . . . . . . . . . . . .
Figure 3–6: Horizontal Controls 3–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–7: Acquisition: Input Analog Signal,
Sample, and Digitize 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–8: Several Points May be Acquired for
Each Point Used 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–9: Real-Time Sampling 3–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Figure 3–10: How the Acquisition Modes Work 3–21. . . . . . . . . . . . . . . . .
Figure 3–11: Acquisition Menu and Readout 3–22. . . . . . . . . . . . . . . . . . . .
Figure 3–12: Acquire Menu — Stop After 3–23. . . . . . . . . . . . . . . . . . . . . .
Figure 3–13: Aliasing 3–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–14: Display Menu — Style 3–26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–15: Trigger Point and Level Indicators 3–27. . . . . . . . . . . . . . . . .
Figure 3–16: Display Menu — Setting 3–30. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–17: Display Menu — Palette Colors 3–32. . . . . . . . . . . . . . . . . . .
Figure 3–18: Display Menu — Map Reference Colors 3–33. . . . . . . . . . . .
Figure 3–19: Display Menu — Restore Colors 3–34. . . . . . . . . . . . . . . . . . .
Figure 3–20: Zoom Mode with Horizontal Lock Set to None 3–37. . . . . . .
Figure 3–21: Dual Window (Preview) Mode 3–38. . . . . . . . . . . . . . . . . . . . .
Figure 3–22: Dual Zoom — Shown Dual Window
(Preview) Mode 3–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–23: Triggered Versus Untriggered Displays 3–42. . . . . . . . . . . . .
Figure 3–24: Trigger Holdoff Time Ensures Valid Triggering 3–44. . . . . .
Figure 3–25: Slope and Level Controls Help Define the Trigger 3–45. . . .
Figure 3–26: TRIGGER Controls and Status Lights 3–46. . . . . . . . . . . . . .
Figure 3–27: Example Trigger Readouts — Edge
Trigger Selected 3–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–28: Record View, Trigger Position, and Trigger Level Bar
Readouts 3–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–29: Edge Trigger Readouts 3–50. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–30: Main Trigger Menu — Edge Type 3–50. . . . . . . . . . . . . . . . .
Figure 3–31: Violation Zones for Setup/Hold Triggering 3–56. . . . . . . . . .
Figure 3–32: Logic Trigger Readouts — State Class Selected 3–57. . . . . .
Figure 3–33: Logic Trigger Menu 3–58. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–34: Logic Trigger Menu — Time Qualified TRUE 3–60. . . . . . .
Figure 3–35: Triggering on a Setup/Hold Time Violation 3–64. . . . . . . . . .
Figure 3–36: TLA 714 to TDS 694C 3–66. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–37: TLA 720 to TDS 694C 3–66. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–38: Pulse Trigger Readouts 3–70. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–39: Main Trigger Menu — Glitch Class 3–72. . . . . . . . . . . . . . . .
Figure 3–40: Main Trigger Menu — Runt Class 3–75. . . . . . . . . . . . . . . . .
Figure 3–41: Main Trigger Menu — Slew Rate Class 3–80. . . . . . . . . . . . .
Figure 3–42: Delayed Runs After Main 3–83. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–43: Delayed Triggerable 3–83. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–44: How the Delayed Triggers Work 3–85. . . . . . . . . . . . . . . . . . .
Figure 3–45: Delayed Trigger Menu 3–87. . . . . . . . . . . . . . . . . . . . . . . . . . .
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Figure 3–46: Histogram, Graticule, Cursor and
Automated Measurements 3–89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–47: Measurement Readouts with Statistics 3–93. . . . . . . . . . . . . .
Figure 3–48: Measure Menu 3–94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–49: Measure Menu — Gating 3–95. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–50: Measure Menu — Reference Levels 3–97. . . . . . . . . . . . . . . .
Figure 3–51: Measure Delay Menu — Delay To 3–98. . . . . . . . . . . . . . . . . .
Figure 3–52: Snapshot Menu and Readout 3–99. . . . . . . . . . . . . . . . . . . . . .
Figure 3–53: Cursor Types 3–101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–54: Cursor Modes 3–102. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–55: H Bars Cursor Menu and Readouts 3–103. . . . . . . . . . . . . . . .
Figure 3–56: Paired Cursor Menu and Readouts 3–104. . . . . . . . . . . . . . . .
Figure 3–57: Histogram Menu and Vertical Histogram 3–107. . . . . . . . . . .
Figure 3–58: Performing a Signal Path Compensation 3–111. . . . . . . . . . . .
Figure 3–59: Probe Cal Menu and Gain Compensation Display 3–113. . . .
Figure 3–60: Re-use Probe Calibration Data Menu 3–115. . . . . . . . . . . . . . .
Figure 3–61: Save/Recall Setup Menu 3–118. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–62: Save Waveform Menu 3–121. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–63: More Menu 3–123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–64: File Utilities 3–125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–65: File System — Labeling Menu 3–126. . . . . . . . . . . . . . . . . . . . .
Figure 3–66: Utility Menu — System I/O 3–131. . . . . . . . . . . . . . . . . . . . . . .
Figure 3–67: Hardcopy Formats 3–132. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–68: Date and Time Display 3–133. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–69: Connecting the Oscilloscope Directly to the
Hardcopy Device 3–134. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–70: Connecting the Oscilloscope and Hardcopy
Device Via a PC 3–137. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–71: Typical GPIB Network Configuration 3–140. . . . . . . . . . . . . .
Figure 3–72: Stacking GPIB Connectors 3–140. . . . . . . . . . . . . . . . . . . . . . .
Figure 3–73: Connecting the Oscilloscope to a Controller 3–141. . . . . . . . .
Figure 3–74: Utility Menu 3–142. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–75: Status Menu — System 3–144. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–76: Banner Display 3–145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–77: Initial Help Screen 3–146. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–78: Comparing a Waveform to a Limit Template 3–148. . . . . . . .
Figure 3–79: Acquire Menu — Create Limit Test Template 3–149. . . . . . . .
Figure 3–80: More Menu 3–153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–81: Dual Waveform Math Main and Side Menus 3–154. . . . . . . .
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Figure 3–82: System Response to an Impulse 3–157. . . . . . . . . . . . . . . . . . . .
Figure 3–83: Define FFT Waveform Menu 3–158. . . . . . . . . . . . . . . . . . . . . .
Figure 3–84: FFT Math Waveform in Math1 3–160. . . . . . . . . . . . . . . . . . . .
Figure 3–85: Cursor Measurement of an FFT Waveform 3–161. . . . . . . . . .
Figure 3–86: Waveform Record vs. FFT Time Domain Record 3–163. . . . .
Figure 3–87: FFT Time Domain Record vs. FFT Frequency
Domain Record 3–164. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–88: How Aliased Frequencies Appear in an FFT 3–168. . . . . . . . .
Figure 3–89: Windowing the FFT Time Domain Record 3–171. . . . . . . . . .
Figure 3–90: FFT Windows and Bandpass Characteristics 3–174. . . . . . . .
Figure 3–91: Derivative Math Waveform 3–176. . . . . . . . . . . . . . . . . . . . . . .
Figure 3–92: Peak-Peak Amplitude Measurement of a
Derivative Waveform 3–177. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–93: Integral Math Waveform 3–181. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–94: H Bars Cursors Measure an Integral Math
Waveform 3–182. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–1: MCross Calculations B–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–2: Fall Time B–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–3: Rise Time B–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–4: Choosing Minima or Maxima to Use for Envelope
Measurements B–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure D–1: Typical High Voltage Probes D–3. . . . . . . . . . . . . . . . . . . . . . .
Figure D–2: A6303 Current Probe Used in the
AM 503S Opt. 03 D–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure F–1: Equipment Needed to Run the Example Programs F–1. . . .
TDS 694C User Manual
vi
List of Tables
Table of Contents
Table 1–1: Key Features of TDS 694C 1–3. . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–2: Fuse and fuse cap part numbers 1–7. . . . . . . . . . . . . . . . . . . .
Table 3–1: Autoset defaults 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–2: XY Format pairs 3–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–3: Pattern and State Logic 3–54. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–4: Pulse trigger definitions 3–70. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–5: Measurement definitions 3–90. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–6: Measurement definitions 3–109. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–7: Probe cal status 3–116. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table A–1: Options A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table A–2: Standard accessories A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table A–3: Optional accessories A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table A–4: Recommended probe cross reference A–3. . . . . . . . . . . . . . . .
Table A–5: Accessory software A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table E–1: External inspection check list E–2. . . . . . . . . . . . . . . . . . . . . .
TDS 694C User Manual
vii
Table of Contents
viii
TDS 694C User 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.
To Avoid Fire or
Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Use Proper V oltage Setting. Before applying power, ensure that the line selector is
in the proper position for the power source being used.
Connect and Disconnect Properly . Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Connect the ground lead of the probe to earth ground only.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
TDS 694C User Manual
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry .
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
ix
General Safety Summary
Symbols and Terms
T erms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
T erms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
Electrostatic Discharge
CAUTION
Refer to Manual
WARNING
High Voltage
Double
Insulated
Protective Ground
(Earth) Terminal
Acquisition circuitry in the TDS 694C is very susceptible to damage from
electrostatic discharge and from overdrive signals.
To prevent electrostatic damage to the TDS 694C, be sure to operate the
oscilloscope only in a static-controlled environment. Be sure to discharge to
ground any electrostatic charge that may be present on cables and probes before
attaching them to the oscilloscope.
To prevent damage from electrostatic discharge, install short-circuit terminations
on unused input connectors. Always use a wrist strap with internal impedance
(provided with your instrument) when handling your oscilloscope or making
connections.
TDS 694C User Manual
x
Preface
Related Manuals
This is the User Manual for the TDS 694C Oscilloscopes
The chapter Getting Started briefly describes the TDS 694C Oscilloscopes,
prepares you to install it, and tells you how to put it into service.
The chapter Operating Basics covers basic principles of the operation of the
oscilloscope. The operating interface illustrations and the tutorial examples
rapidly help you understand how your oscilloscope operates.
The chapter Reference teaches you how to perform specific tasks. See page 3–1
for a complete list of operating tasks covered in that chapter.
The Appendices provide an options listing, an accessories listing, and other
useful information.
The following documents are related to the use or service of the oscilloscope.
H The TDS Family Digitizing Oscilloscopes Programmer Manual (a diskette
that is included with the user manual) describes using a computer to control
the oscilloscope through the GPIB interface.
Conventions
TDS 694C User Manual
H The TDS 500D, TDS 600C & TDS 700D Digitizing Oscilloscopes Reference
(Quick Reference) gives you a quick overview of how to operate the
oscilloscope.
H The TDS 500D, TDS 600C, & TDS 700D Technical Reference (Performance
Verification and Specifications) tells how to verify the performance of the
oscilloscope and lists its specifications.
H The TDS 500B, TDS 600B, TDS 600B, & TDS 700A Service Manual
provides information for maintaining and servicing the oscilloscope to the
module level.
In this manual, you will find various procedures which contain steps of
instructions for you to perform. To keep those instructions clear and consistent,
this manual uses the following conventions:
H In procedures, names of front panel controls and menu labels appear in
boldface print.
xi
Preface
H Names also appear in the same case (initial capitals or all uppercase) in the
manual as is used on the oscilloscope front panel and menus. Front panel names
are all upper case letters, for example, VERTICAL MENU and CH 1.
H Instruction steps are numbered. The number is omitted if there is only one step.
H When steps require that you make a sequence of selections using front panel
controls and menu buttons, an arrow ( ➞ ) marks each transition between a
front panel button and a menu, or between menus. Also, whether a name is a
main menu or side menu item is clearly indicated: Press VERTICAL
MENU ➞ Coupling (main) ➞ DC (side) ➞ Bandwidth (main) ➞
250 MHz (side).
Using the convention just described results in instructions that are graphically
intuitive and simplifies procedures. For example, the instruction just given
replaces these five steps:
1. Press the front-panel button VERTICAL MENU.
2. Press the main-menu button Coupling.
3. Press the side-menu button DC.
4. Press the main-menu button Bandwidth.
5. Press the side-menu button 250 MHz.
Sometimes you may have to make a selection from a pop-up menu: Press
TRIGGER MENU ➞ Type (main) ➞ Edge (pop-up). In this example, you
repeatedly press the main menu button Type until Edge is highlighted in the
pop-up menu.
xii
TDS 694C User Manual
Product Description
The Tektronix TDS 694C Digital Real-Time Oscilloscope is a superb tool for
acquiring, displaying, and measuring waveforms. Its performance addresses the
needs of both benchtop lab and portable applications with the following key
features:
H An analog bandwidth of 3 GHz simultaneous on 4 channels
H A maximum sample rate of up to 10 GS/s simultaneous on 4 channels
H Records lengths up to 120 K
H Up to 29 automatic measurements and measurement statistics (see Taking
Automated Measurements on page 3–88)
H 1% DC vertical gain accuracy (see TDS 500D, TDS600B & TDS 700D
Technical Reference manual)
H Internal floppy disk storage and compatible with Iomega 100 Mbyte Zip
drive (see Saving Waveforms and Setups on page 3–115)
H Optional internal hard drive
H Trigger modes include edge, logic, pulse, delay, modes (see Triggering on
Waveforms on page 3–39)
H Java application support
H TLA 700 Logic Analyzer cross-triggering support
TDS 694C User Manual
1–1
Product Description
H Advanced features include limit testing (see Limit Testing on page 3–145),
FFT (see Fast Fourier Transforms on page 3–153), waveform differentiation
and integrations (see Waveform Differentiation and Waveform Integration
starting on page 3–172), waveform histograms (see Displaying Histograms
on page 3–104)
H Adjustable channel deskew for increased measurement accuracy (see
Channel/Probe Deskew on page 3–109)
H Full GPIB programmability (see Communicating with Remote Instruments
on page 3–137 and the TDS Family Programmer Manual disk)
H Wide array of probing solutions (see Accessory Probes on page 0–3 and
Probe Selection on page 0–1)
H CE, FCC, UL, and CAN/CSE compliant (see TDS 500D, TDS600B &
TDS 700D Technical Reference manual)
H All 4 channels have 8-bit resolution. (See Table 1–1 on page 1–3.)
H Dual Window Zoom, which shows a waveform magnified and unmagnified
on the same display (see Using Dual Window Mode on page 3–35)
H Sample, envelope, average, and peak-detect modes (see Table 1–1,
on page 1–3.)
1–2
TDS 694C User Manual
TDS 694C Features
Product Description
Table 1–1 lists some key TDS 694C features that are covered in this manual.
T able 1–1: Key Features of TDS 694C
Feature TDS 694C
No. of channels 4
Digitizing rate, max. 10 GS/s
No. of Channels. @ maximum rate 4
Analog Bandwidth 3 GHz
Record Lengths, max. To 120 K/Channel
Advanced DSP Math
1
Storage, Floppy Disk Std.
I/0 includes RS–232 and Centronics
3
iomega Zip Drive support Std.
Std.
Std.
2
2
2
2
Input Impedance 50 W only
1
Advanced digital signal processing provides FFT s, integrals, and derivatives of
waveforms. See Option 2F on page 0–2.
2
Std. denotes a standard product feature as opposed to a feature included as part of
an option.
3
GPIB I/O included with all models.
TDS 694C User Manual
1–3
Product Description
Product Specification
The product specification is found in the technical reference TDS 500D,
TDS 600C, & TDS 700D Technical Reference (Performance Verification and
Specifications) that is shipped as a standard accessory with the TDS 694C Oscil-
loscopes.
1–4
TDS 694C User Manual
Start Up
Preparation
Before you use the TDS 694C Oscilloscopes, ensure that it is properly installed
and powered on.
To ensure maximum accuracy for your most critical measurements, you should
know about signal path compensation and the proper use of the probe you choose
to use with your oscilloscope.
Signal Path Compensation
Recommended Probes
Probe Usage
Be sure you compensate your oscilloscope for the surrounding temperature. This
action, called Signal Path Compensation (SPC), ensures maximum possible
accuracy for your most critical measurements. See Signal Path Compensation on
page 3–108 for a description of and operating information on this feature.
The TDS 694C Oscilloscopes ships without probes. To take advantage of the
higher bandwidth of these oscilloscopes, order P6249 or P6158 probes.
For a list of recommended optional-accessory probes see Accessory Probes on
page A–3. Probes that require a 1 MW input, like the P6139A, will not work on
the TDS 694C.
Be sure you use the appropriate probe for the measurement. (See the User
manual for the probe for more information.)
CAUTION. Using the P6249 or P6245 Active Probe to measure signals greater
than ±40 volts may damage the probe. Using the P6158 Voltage Divider Probe to
measure signals greater than ±22 V
may damage the probe.
RMS
Putting into Service
TDS 694C User Manual
To learn how to install, access the front panel, power on, do a self test, and
power off the oscilloscope, do the following procedures:
1–5
Start Up
Installation
To properly install and power on the oscilloscope, do the following steps:
1. Be sure you have the appropriate operating environment. Specifications for
temperature, relative humidity, altitude, vibrations, and emissions are
included in the TDS 500D, TDS 600C, & TDS 700D Technical Reference
(Performance Verification and Specifications)Technical Reference (Perfor-
mance Verification and Specifications) manual (Tektronix part number
071-0496-xx).
CAUTION. To prevent damage to the instrument caused by over heating, the
TDS 694C must have adequate airflow. Verify air intake and exhaust ventilation
in the cabinet as specified in Step 2.
2. Leave space for cooling for both rackmount and bench configurations. Do
this by verifying that the air intake and exhaust holes on the sides and
bottom of the cabinet are free of any airflow obstructions. Leave at least
5.1 cm (2 inches) free on both sides. Leave 2.5 cm (1.0 inch) minimum
space on the bottom of rackmount instruments, the height of the feet will
provide adequate space for bench configurations.
WARNING. To avoid electrical shock, be sure that the power cord is disconnected
before checking the fuse.
3. Check the fuse to be sure it is the proper type and rating (see Figure 1–1).
You can use either of two fuses. Each fuse requires its own cap (see
Table
1–2). The oscilloscope is shipped with the UL approved fuse installed.
4. Check that you have the proper electrical connections. The oscilloscope
requires 100 to 240 VAC
, continuous range, 45 Hz to 440 Hz, and may
RMS
require up to 450 W.
1–6
TDS 694C User Manual
Power Connector
Principal Power Switch
Fuse
Start Up
Figure 1–1: Rear Panel Controls Used in Start Up
5. Connect the proper power cord from the rear-panel power connector (see
Figure 1–1) to the power system.
Front Cover Removal
Power On
T able 1–2: Fuse and fuse cap part numbers
Fuse cap part
Fuse Fuse part number
0.25 inch × 1.25 inch (UL 198.6, 3AG): 6 A
FAST, 250 V
5 mm × 20 mm (IEC 127): 5 A (T), 250 V 159-0210-00 200-2265-00
159-0013-00 200-2264-00
number
To remove the front cover, grasp the left and right edges and snap the cover off
of the front subpanel. (To reinstall the cover, align it to the front subpanel and
snap it back on.)
To power on the oscilloscope, do the following steps:
1. Check that the rear-panel principal power switch is on (see Figure 1–1). The
principal power switch controls all AC power to the instrument.
2. If the oscilloscope is not powered on (the screen is blank), push the
front-panel ON/STBY button to toggle it on (see Figure 1–2).
TDS 694C User Manual
1–7
Start Up
ON/STBY Button
Self Test
Power Off
Figure 1–2: ON/STBY Button
The ON/STBY button controls power to most of the instrument circuits. Power
continues to go to certain parts even when this switch is set to STBY.
Once the oscilloscope is installed, it is typical to leave the principal power
switch on and use the ON/STBY button instead of the power switch.
The oscilloscope automatically performs power-up tests each time it is turned on.
It will come up with a display screen that states whether or not it passed the self
test. To determine the self-test results, check the screen. (If the self test passed,
the status display screen will be removed after a few seconds.)
If the self test fails, call your local Tektronix Service Center. Depending on the
type of failure, you may still be able to use the oscilloscope before it is serviced.
To power off the oscilloscope, toggle the ON/STBY switch.
1–8
TDS 694C User Manual
Overview
This chapter describes the basic concepts of operating the TDS 694C Digital
Real-Time Oscilloscope. Understanding the basic concepts of your oscilloscope
will help you use it much more effectively.
The first section, Operating Interface Maps, quickly shows you how the
oscilloscope controls are organized and where you can read about them. It also
illustrates the general procedures for operating the menu system. This section
includes the titles:
H Front Panel Map
H Rear Panel Map
H Display Map
H To Operate a Menu
H To Operate a Pop-Up Menu
The second section, Tutorial, contains example procedures that lead you through
the fundamental tasks needed to display a waveform measurement. It also
includes an example procedure that teaches you how to store a setup of the
oscilloscope controls for later use. This section includes the following tutorial examples:
TDS 694C User Manual
H Setting Up for the Examples
H Example 1: Displaying a Waveform
H Example 2: Displaying Multiple Waveforms
H Example 3: Taking Automated Measurements
H Example 4: Saving Setups
To explore these topics in more depth and to read about topics not covered in this
section, see Reference. A list of the topics covered begins on Page 3–1.
2–1
Overview
2–2
TDS 694C User Manual
Operating Interface Maps
This section contains illustrations, or maps, of the display, the front and rear
panels, and the menu system of the TDS 694C Oscilloscopes. These maps will
help you understand and operate the oscilloscope. This section also contains a
visual guide to using the menu system.
Front Panel Map — Left Side
File System,
page 3–122
Side Menu Buttons,
page 2–7
ON/STBY Switch,
page 1–7
TDS 694C User Manual
CLEAR MENU
Removes Menus
from the Display
Main Menu Buttons,
page 2–7
2–3
Operating Interface Maps
Front Panel Map — Right Side
Measurement System, page 3–88
Cursor Measurements, page 3–98
Saving and Recalling
Waveforms, page 3–118
File System, page 3–122
Autoset, page 3–4
Help, page 3–143
Status, page 3–141
Saving and Recalling
Setups, page 3–115
Selecting Channels,
page 3–6
Waveform Math,
page 3–150
Hardcopy, page 3–127
File System, page 3–122
Acquisition Modes, page 3–17
Cursor
Measurements,
page 3–98
Color, page 3–28
Display Settings,
page 3–23
Remote
Communication,
page 3–137
Probe Calibration,
page 3–109
Vertical Controls,
page 3–9
2–4
Zoom, page 3–32
Horizontal Controls,
page 3–13
Ground
Triggering, page 3–39
Delay Triggering, page 3–80
Edge Triggering, page 3–47
Logic Triggering, page 3–51
Pulse Triggering, page 3–67
TDS 694C User Manual
Rear Panel Map
Operating Interface Maps
Principal Power
Switch,
page 1–7
Fuse,
page 1–6
Centronics Connector, page 3–127
Zip Drive, page 3–126
Serial Number
RS-232 Connector,
page 3–127
Power Connector,
page 1–6
GPIB Connector,
page 3–137
Rear Panel Connectors Security Bracket
AUX TRIGGER INPUT –
(Provides Auxiliary Trigger Signal Input)
MAIN TRIGGER OUTPUT –
(Provides Main Trigger (TTL) Output)
DELAYED TRIGGER OUTPUT –
(Provides Delayed Trigger (TTL) Output)
VGA Output
TDS 694C User Manual
2–5
Operating Interface Maps
Display Map
acquisition
page 3–20
Trigger level on
waveform (may be an
arrow at right side of
screen instead of a bar).
The
status,
Indicates position of
vertical bar cursors in the
waveform record,
page 3–102
Shows what part of the waveform
record is displayed, page 3–12
Trigger
position (T),
page 3–46
The value entered with
the general purpose
knob
or keypad.
The waveform
record icon
Shows what part of
waveform record
When present, the general
purpose knob makes coarse
adjustments; when absent,
fine adjustments.
the acquisition
record is in the
Cursor measurements,
page 3–98
Channel level and
waveform source.
2–6
Vertical scale,
page 3–9
The main menu with
choices of major actions
The side menu
with choices of
specific actions.
Trigger parameters,
page 3–46
Horizontal scale and time
base type, page 3–13
TDS 694C User Manual
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