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Tektronix TDS3000C Series Manual

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Troubleshooting Your Design
with the TDS3000C Series Oscilloscopes

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Summary of Contents for Tektronix TDS3000C Series

  • Page 1 Troubleshooting Your Design with the TDS3000C Series Oscilloscopes...
  • Page 2 TDS3000C Series Oscilloscopes www.tektronix.com/tds3000...

  • Page 3: Table Of Contents

    Look for Unintentional Circuit Noise ......... . . 21 Remote Troubleshooting Using Your Computer’s Browser ......22 TDS3000C Series Oscilloscopes www.tektronix.com/tds3000...

  • Page 4: Getting Started

    1. Press the front panel Save/Recall menu button. 2. Press the Recall Factory Setup bottom screen menu button. 3. Press the OK Confirm Factory INIT side screen menu button. 4. Press the front panel Autoset button. Adjusting Probe P6139A TDS3000C Series Oscilloscopes www.tektronix.com/tds3000...

  • Page 5: Debug Digital Timing Problems

    Digital designers need to quickly find and analyze a wide range of circuit timing problems. For example, race conditions and transients can cause circuits to perform inaccurately. The TDS3000C Series’ pulse width trigger can help troubleshoot such situations by triggering when a signal pulse width is less than, greater than, equal to or not equal to a specified pulse width.

  • Page 6: Debug Rise Time And Fall Time Problems

    The signal’s edge speed, known as the slew rate, can affect the operation of digital bus transceivers, transmission lines and op-amp circuits. The TDS3000C Series’ slew rate trigger can help troubleshoot such situations by capturing waveforms where the slew rate is less than, greater than, equal to, or not equal to a specified rate.

  • Page 7: Debug Threshold Problems

    1. In the Trigger section, press the Menu button. 2. In the bottom menu, press Type until Pulse is selected. 3. In the bottom menu, press Class to select Runt. 4. Select, as desired, Source, Polarity, Trigger When, Thresholds, and Mode & Holdoff. TDS3000C Series Oscilloscopes www.tektronix.com/tds3000...

  • Page 8: Debug Digital Logic Problems

    The TDS3000C Series’ logic triggers, such as its pattern and state triggers, can be used to tackle these problems.

  • Page 9: Capture Elusive Glitches And Waveform Anomalies

    Capture Elusive Glitches and Waveform Anomalies In today’s high-speed digital designs, elusive glitches and random anomalies can cause circuits to fail. The TDS3000C Series speeds anomaly detection with its digital phosphor technology and patented WaveAlert waveform anomaly detection feature. The TDS3000C Series employs digital phosphor technology to capture and display infrequent wave- forms or waveform variations.
  • Page 10 Capture Elusive Glitches and Waveform Anomalies (continued) The TDS3000C Series’ WaveAlert waveform anom- aly detection feature speeds your troubleshooting task by helping you find elusive problems faster. WaveAlert monitors the incoming signals on all channels and will detect and highlight any wave- form that deviates from the “normal”...

  • Page 11: Check Signal Integrity

    To characterize these events, engineers can measure criteria such as overshoot, ringing, ground bounce, cross talk, and other signal integrity issues. The TDS3000C Series’ cursors and automatic measurements can be used to take such measurements. To make signal integrity measurements using cursors: 1.
  • Page 12 In this example, look for the positive and negative overshoot measurements. 4. Select Positive Overshoot and Negative Overshoot from the side menu buttons. 5. View the measurements selected on the right side of the display. TDS3000C Series Oscilloscopes www.tektronix.com/tds3000...

  • Page 13: Test For Presence Of Video Signals

    If the site is in the field, technicians will need lightweight, portable test equipment gear that they can easily carry to each location. The TDS3000C Series, with its optional battery- powered operation and video trigger features, make this oscilloscope a valuable tool for these technicians.

  • Page 14: Test Each Line Of A Video Signal

    (CCD) video camera. The TDS3000C Series’ video triggers enable technicians to test each line of a video signal. To use the TDS3000C Series’ video trigger to check each line of a video signal: 1. Connect the oscilloscope to the video signal using proper adapters and a 75 terminator, if necessary.

  • Page 15: Determine If This Video Signal Is The Desired Video Signal

    Video technicians want to determine if the displayed signal is the desired signal. Is it the news program or the sports program? With the TDS3000C Series, these technicians can make this determination by simply viewing a picture image of the video source.

  • Page 16: Check Video Color Signals

    Video technicians need to check for chroma (color) level problems and to adjust video equipment to solve any such problems. The TDS3000C Series can function as a vectorscope with built-in gratic- ules for 100% or 75% color bars to enable these technicians to measure chroma levels and view color signal phase and amplitude problems.

  • Page 17: Check The Quality Of A Communications Signal

    Intense time-to-market pressures require that they do so quickly and efficiently. The TDS3000C Series, with its mask testing capability, constellation diagrams and eye diagrams, is an ideal tool for these developers.
  • Page 18 Some communications signals are encoded in a Quadrature Amplitude Modulation (QAM) format. To test the distortion of such a signal, engineers can use the TDS3000C Series to generate a constellation diagram and analyze the clarity of the signal’s amplitude and phase at discrete times in the diagram.
  • Page 19 The TDS3000C Series allows these tech- nicians to check the quality of a communications signal using eye diagrams. To use an eye diagram to check the quality of a communications signal: 1.

  • Page 20: Make A Quick Pass/Fail Test Of A Device-Under-Test (Dut)

    Make a Quick Pass/Fail Test of a Device-under-test (DUT) Manufacturing engineers often perform repetitive tests in which they desire quick pass/fail decisions on a DUT. The TDS3000C Series offers quick pass/fail, or limit, tests by comparing active signals of a DUT with template envelope waveforms of a known good device.

  • Page 21: Look For Unintentional Circuit Noise

    For example, switching power supplies can generate odd-order harmonics, which can enter the power grid and degrade designs. The TDS3000C Series offers a standard FFT feature, making it an ideal tool for these developers. To create and run an FFT measurement: 1.

  • Page 22: Remote Troubleshooting Using Your Computer's Browser

    4. Press Return. 5. The browser program will load the oscilloscope’s home For more detail about the operation of the TDS3000C Series’ e*Scope feature, please refer to page and will include an image of the screen’s contents. the application note, e*Scope Remote Control Puts Network-Connected Oscilloscope on Your PC Desktop, located at www.tektronix.com.
  • Page 23 © 2008, Tektronix. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specification and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade names referenced are the service marks, trademarks or registered trademarks of their respective companies.

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