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Tektronix TDS3TRG User Manual

Tektronix TDS3TRG User Manual

Advanced trigger, application module
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User Manual
TDS3TRG
Advanced Trigger
Application Module
071-0305-01
This document supports firmware version 2.00
and above.

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Summary of Contents for Tektronix TDS3TRG

  • Page 1 User Manual TDS3TRG Advanced Trigger Application Module 071-0305-01 This document supports firmware version 2.00 and above.
  • Page 2 Copyright Tektronix, Inc. All rights reserved. Tektronix 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. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
  • Page 3 WARRANTY SUMMARY Tektronix 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 from an authorized Tektronix distributor. If a product proves defective within the respective period, Tektronix will provide repair or replacement as described in the complete warranty statement.

  • Page 5: Table Of Contents

    ....... . . Appendix Appendix A: Specifications ......TDS3TRG Advanced Trigger User Manual...
  • Page 6 Table of Contents TDS3TRG Advanced Trigger User Manual...

  • Page 7: General Safety Summary

    Do Not Operate in an Explosive Atmosphere. Safety Terms and Symbols Terms in This Manual. The following term appears in this manual: CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. TDS3TRG Advanced Trigger User Manual...
  • Page 8 Do not slide sensitive components over any surface. Do not touch exposed connector pins. Handle sensitive components as little as possible. Transport and Store Carefully. Transport and store sensitive components in a static-protected bag or container. TDS3TRG Advanced Trigger User Manual...

  • Page 9: Preface

    Preface This User Manual describes the capabilities, operation, and applications of the TDS3TRG Advanced Trigger application module. The following table shows you where to find information in this manual. If you are looking for: Turn to: Installation information Installing Application Module and...

  • Page 10: Contacting Tektronix

    1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tektronix.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Tektronix offers extended warranty and calibration Support programs as options on many products.

  • Page 11: Getting Started

    Getting Started This chapter describes how to install and check the TDS3TRG Advanced Trigger application module. Installing Application Module and Firmware You can install up to four application modules in the oscilloscope. Application modules go into the two slots with windows in the upper right corner of the front panel.
  • Page 12 5. Close the module door. NOTE. If you remove an application module, the features provided by that application module are no longer available. You can reinstall the module to restore the features. Application modules Contacts TDS3TRG Advanced Trigger User Manual...
  • Page 13 If a second firmware floppy disk is required, the oscilloscope will instruct you to eject the first disk and insert the second disk. When the firmware upgrade is complete, the oscilloscope will restart automatically with the new firmware. TDS3TRG Advanced Trigger User Manual...

  • Page 14: Checking Module Installation

    Firmware Upgrade Procedure, starting at step 6 on page 3. 2. Push the Trigger MENU button. 3. Push the Type bottom screen button. The pop-up menu now includes Logic and Pulse entries. TDS3TRG Advanced Trigger User Manual...

  • Page 15: Troubleshooting Module Installation

    7. Turn on the oscilloscope. If the oscilloscope now shows the application module menu items, you have a problem with one of the application module slots. Contact the nearest Tektronix service center to resolve the problem. If the oscilloscope does not show the application menu items,...

  • Page 16: Operating Basics

    This chapter describes the features of the module, how to access the advanced trigger menu, and logic triggering concepts. Advanced Trigger Features The TDS3TRG Advanced Trigger application module adds logic and pulse triggering capabilities to your TDS3000 series oscilloscope. This section provides an overview of these new features.
  • Page 17 (rise or fall time) is less than, greater than, equal to, or not equal to a specified slew rate. This trigger is useful for troubleshooting digital bus transceivers, transmission lines, and op-amp circuits. TDS3TRG Advanced Trigger User Manual...

  • Page 18: Accessing Advanced Triggering

    3. Push the Type bottom screen button to display the trigger type pop-up menu. 4. Push the Type bottom screen button to select Logic or Pulse triggering. 5. Push the Class screen button to select trigger class. TDS3TRG Advanced Trigger User Manual...

  • Page 19: Advanced Trigger Concepts

    These problems include a pulse that is too narrow or wide, and situations in which one signal is true when a second signal transitions from low to high. TDS3TRG Advanced Trigger User Manual...
  • Page 20 Crossing the threshold level toggles the state value of that signal. High logic Signal state threshold voltage setting Low logic Low logic state state = Transition point from one state to another TDS3TRG Advanced Trigger User Manual...
  • Page 21 Low logic effectively inverts the signal. Defining the logical state of a signal lets you use Boolean logic to evaluate when a condition is true for two signals. High-true logic True True False Low-true logic False False True TDS3TRG Advanced Trigger User Manual...
  • Page 22 The NOR (Not-OR) function means if any or all of the trigger signal logic states are true, the condition is false, otherwise the condition is true. This function is the inverse of the OR function. TDS3TRG Advanced Trigger User Manual...
  • Page 23 True False True False Remember that the logic function evaluates the logic states of two signals, and that the logic state of each signal depends on whether they are set to high-true or low-true logic. TDS3TRG Advanced Trigger User Manual...
  • Page 24 The material you have just read provides a basic understanding of the triggering concepts you need in order to use the Logic and Pattern triggering functions. Refer to the Reference section for detailed information about the advanced trigger functions. TDS3TRG Advanced Trigger User Manual...

  • Page 25: Reference

    39.6 ns to 10 s. In the menu tables, N represents a numeric value entered using the general purpose knob, or a value calculated by the oscillo- scope (for example, slew rate). TDS3TRG Advanced Trigger User Manual...

  • Page 26: Pattern Triggering

    The Boolean logic function used to compare the two signals. When to trigger. The oscilloscope can be set to trigger when the Boolean condition is true or false, or is true for a specified time period. TDS3TRG Advanced Trigger User Manual...
  • Page 27 Triggers the oscilloscope when the Is True = N input logic condition is true for a time period equal to or not equal to the time Is True N period N within a 5% tolerance. TDS3TRG Advanced Trigger User Manual...
  • Page 28 Set to Min Sets trigger holdoff value to the minimum value. Key Points Trigger When. The input condition must be true or false for 2 ns in order for the oscilloscope to detect the pattern. TDS3TRG Advanced Trigger User Manual...
  • Page 29 12 ms Thresholds Set to TTL Channel 1 Channel 4 Signals true, Signals true, Signals true, Time < 11.4 ms: Time > 12.6 ms: Time = 11.6 ms: no trigger no trigger trigger = Trigger point TDS3TRG Advanced Trigger User Manual...
  • Page 30 Input 1 Logic Input 2 Source Input 2 Logic Define Logic Trigger When Goes True Thresholds Level (Input 1) 2.5 V Level (Input 2) 2.5 V Channel 1 Channel 2 Condition is true: trigger = Trigger point TDS3TRG Advanced Trigger User Manual...

  • Page 31: State Triggering

    Whether to clock on low to high transitions, or clock on high to low transitions. The signal threshold voltage level for both signals. When to trigger. The oscilloscope can be set to trigger when the state condition is true or false. TDS3TRG Advanced Trigger User Manual...
  • Page 32 Key Point Trigger When Goes True/Goes False. The state signal must be true or false for 2 ns prior to the clock transition in order for the oscillo- scope to detect the state. TDS3TRG Advanced Trigger User Manual...
  • Page 33 No additional clock input edges are recognized until the state input transitions. True State input Clock input No state input transition True State input = Trigger point Clock input TDS3TRG Advanced Trigger User Manual...
  • Page 34 Thresholds Level (State Input) –1.3 V Level (Clock Input) 1.4 V Channel 1 (State) Channel 3 (Clock) State is false, State is true, Clock is true: Clock is true: no trigger trigger = Trigger point TDS3TRG Advanced Trigger User Manual...

  • Page 35: Pulse Width Triggering

    Threshold level Triggers when pulse is Triggers when pulse is not equal to width setting 5% equal to width setting 5% Threshold level Tolerance Tolerance = Trigger point TDS3TRG Advanced Trigger User Manual...
  • Page 36 Pulse Width > N width N. Pulse Width = N Triggers the oscilloscope when the signal pulse width is equal to or not equal to the specified pulse width N Pulse Width N within a 5% tolerance. TDS3TRG Advanced Trigger User Manual...
  • Page 37 50% of the input’s peak-to-peak value. Mode & Refer to description on page 18. Holdoff Key Points Trigger When. The source pulse width must be 5 ns in order for the oscilloscope to detect the pulse. TDS3TRG Advanced Trigger User Manual...
  • Page 38 Trigger Menu: Type = Pulse, Class = Width Bottom Side Setting Source Polarity Positive Trigger When Pulse Width 60 ns Level Set to 50% 60 ns Channel 2 Width 60 ns 5%: trigger = Trigger point TDS3TRG Advanced Trigger User Manual...

  • Page 39: Runt Pulse Triggering

    Runt pulse is less Runt pulse is greater than width setting than width setting Runt pulse is equal to width Runt pulse is not equal to width setting 5% tolerance setting 5% tolerance Tolerance Tolerance = Trigger point TDS3TRG Advanced Trigger User Manual...
  • Page 40 Runt Width > N Runt Width = N Triggers the oscilloscope when the runt signal pulse width is equal to or not equal to the specified pulse width Runt Width N N within a 5% tolerance. TDS3TRG Advanced Trigger User Manual...
  • Page 41 –1.5 V (low threshold). Mode & Refer to description on page 18. Holdoff Key Points Trigger When. The source runt pulse width must be 5 ns in order for the oscilloscope to detect the pulse. TDS3TRG Advanced Trigger User Manual...
  • Page 42 (a runt signal). Set the runt-pulse trigger parameters as listed in the table: Trigger Menu: Type = Pulse, Class = Runt Bottom Side Source Polarity Positive Trigger When Runt Occurs Thresholds Set to ECL Channel 1 Runt signal: trigger = Trigger point TDS3TRG Advanced Trigger User Manual...

  • Page 43: Slew Rate Triggering

    The oscilloscope can trigger on positive or negative slew rates. The combination of high and low threshold levels and delta time determine the slew-rate setting. Delta time High Threshold Delta voltage (high threshold – low threshold) Threshold Slew rate = Delta voltage Delta time TDS3TRG Advanced Trigger User Manual...
  • Page 44 Actual slew rate Actual slew rate Signal slew rate is equal to Signal slew rate is not equal specified slew rate within to specified slew rate within 5% tolerance 5% tolerance Tolerance Tolerance = Trigger point TDS3TRG Advanced Trigger User Manual...
  • Page 45 N Slew Rate N within a 5% tolerance. Delta Time Sets the delta time component of the slew rate value to time N, using the general purpose knob. TDS3TRG Advanced Trigger User Manual...
  • Page 46 Trigger When. The delta time component of the slew rate (time from threshold to threshold) must be 5 ns in order for the oscilloscope to detect the slew rate. TDS3TRG Advanced Trigger User Manual...
  • Page 47 Polarity Positive Trigger When Slew Rate < Delta time 50 ns Thresholds High 3.5 V 0.8 V Channel 2 Actual slew rate less (slower) than 54 mV/ns = Trigger point 54 mV/ns (specified slew rate) TDS3TRG Advanced Trigger User Manual...

  • Page 48: Appendix A: Specifications

    Appendix A: Specifications This appendix describes the TDS3TRG Advanced Trigger applica- tion module specifications. All specifications are guaranteed unless labeled ”typical.” Typical specifications are provided for your convenience but are not guaranteed. To meet specifications, two conditions must first be met: The oscilloscope must have been operating continuously for ten minutes within the operating temperature range specified.
  • Page 49 Appendix A: Specifications Table 1: TDS3TRG Advanced Trigger application module specifications (cont.) Characteristic Description Logic Triggering Pattern State Minimum Rearm 2 ns 4 ns Time, typical Pattern minimum rearm time: the time that a logic pattern must be invalid before a new occurrence of the pattern is recognized.
  • Page 50 Appendix A: Specifications TDS3TRG Advanced Trigger User Manual...
  • Page 51 User Manual TDS3FFT FFT Application Module 071-0305-01 This document supports firmware version 2.00 and above.
  • Page 52 Copyright Tektronix, Inc. All rights reserved. Tektronix 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. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
  • Page 53 WARRANTY SUMMARY Tektronix 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 from an authorized Tektronix distributor. If a product or CRT proves defective within the respective period, Tektronix will provide repair or replacement as described in the complete warranty statement.
  • Page 55 ..........Contacting Tektronix .
  • Page 56 Table of Contents TDS3FFT FFT Application Module User Manual...

  • Page 57: General Safety Summary

    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. While using this product, you may need to access other parts of the system.
  • Page 58 General Safety Summary Preventing Electrostatic Damage CAUTION. Electrostatic discharge (ESD) can damage components in the oscilloscope and its accessories. To prevent ESD, observe these precautions when directed to do so. Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components.

  • Page 59: Preface

    Preface This User Manual describes the capabilities, operation, and applications of the TDS3FFT FFT application module. The following table shows you where to find information in this manual. If you are looking for: Turn to: Installation information Installing Application Module and Firmware on page 1 Product overview FFT Features on page 6...

  • Page 60: Contacting Tektronix

    1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tektronix.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Tektronix offers extended warranty and calibration Support programs as options on many products.

  • Page 61: Getting Started

    Getting Started This chapter describes how to install and check the TDS3FFT FFT application module. Installing Application Module and Firmware You can install up to four application modules in the oscilloscope. Application modules go into the two slots with windows in the upper right corner of the front panel.
  • Page 62 Getting Started To install an application module and its associated oscilloscope firmware, do these steps: 1. Save any oscilloscope settings and/or reference waveforms to floppy disk before doing these steps. 2. Turn the oscilloscope power off. 3. Open the small door in the upper right corner of the front panel. 4.
  • Page 63 Getting Started 6. If the application module came with one or more floppy disks, insert the firmware upgrade floppy disk into the floppy disk drive. If there is more than one floppy disk, insert firmware upgrade floppy disk number one into the floppy disk drive. 7.

  • Page 64: Checking Module Installation

    Getting Started NOTE. If you power off the oscilloscope, eject the floppy disk, or there is a power outage during the firmware upgrade process, you must power off the oscilloscope and repeat the firmware upgrade procedure, starting at step 6, before you can use the oscilloscope. 9.

  • Page 65: Troubleshooting Module Installation

    7. Turn on the oscilloscope. If the oscilloscope now shows the application module menu items, you have a problem with one of the application module slots. Contact the nearest Tektronix service center to resolve the problem. If the oscilloscope does not show the application menu items,...

  • Page 66: Operating Basics

    Operating Basics This chapter describes the features of the module, how to access the FFT menu, and FFT measurement concepts. Introduction The FFT application module adds FFT (Fast Fourier Transform) measurement capabilities to your TDS3000 series Digital Phosphor Oscilloscope. The FFT process mathematically converts the standard time-domain signal (repetitive or single-shot acquisition) into its frequency components, providing spectrum analysis capabilities.

  • Page 67: Fft Features

    Operating Basics FFT Features The FFT application module provides the following features: FFT Windows Four FFT windows (Rectangular, Hamming, Hanning, and Blackman-Harris) let you match the optimum window to the signal you are analyzing. The Rectangular window is best for nonperiodic events such as transients, pulses, and one-shot acquisitions.

  • Page 68: Displaying An Fft Waveform

    Operating Basics Displaying an FFT Waveform Do these steps to display an FFT waveform. 1. Set the source signal Vertical SCALE so that the signal peaks do not go off screen. Off-screen signal peaks can result in FFT waveform errors. 2.

  • Page 69: Measurement Concepts

    Operating Basics Measurement Concepts This section introduces the concepts of measuring signal frequency components using an FFT process. You should read this section if you are not familiar with FFT measurement. FFT Process As stated earlier, the FFT process mathematically converts the standard time-domain signal (repetitive or single-shot acquisition) into its frequency components.
  • Page 70 Operating Basics The FFT Display 1. Source signal channel label 2. Math FFT waveform 3. Frequency components TDS3FFT FFT Application Module User Manual...
  • Page 71 Operating Basics FFT Windows The FFT process assumes that the part of the waveform record used for FFT analysis represents a repeating waveform that starts and ends at or near zero volts (in other words is an integer number of cycles). When a waveform starts and ends at the same amplitude, there are no artificial discontinuities in the signal shape, and both the frequency and amplitude information is accurate.
  • Page 72 Operating Basics Applying a window function to the waveform record changes the waveform so that the start and stop values are close to each other, reducing the discontinuities. This results in an FFT measurement that more accurately reflects the actual signal frequency components. The ‘shape’...
  • Page 73 Operating Basics FFT Window Characteristics The FFT application module provides four FFT windows. Each window is a trade-off between frequency resolution and magnitude accuracy. What you want to measure, and your source signal characteristics, help determine which window to use. Use the following guidelines to select the best window.
  • Page 74 Operating Basics Nyquist Frequency The highest frequency that any digital oscilloscope can measure without errors is one-half the sample rate or frequency. This frequency is called the Nyquist frequency. The FFT waveform displays the input signal frequency components from DC (0 Hz) to the Nyquist frequency.
  • Page 75 Operating Basics Eliminating Aliases Use the following methods to eliminate aliases: Increase the sample rate by adjusting the Horizontal SCALE to a faster frequency setting. Since you increase the Nyquist frequency as you increase the frequency, the aliased frequency components should appear at their proper frequency. If the increased number of frequency components shown on the screen makes it difficult to measure individual components, use the Zoom button to magnify the FFT waveform.

  • Page 76: Reference

    Reference The FFT process mathematically converts a time-domain signal into its frequency components. You can set the following FFT measure- ment parameters: The input source The FFT window function The vertical scale FFT Menu The following table and text describes the Math FFT bottom and side menu items.
  • Page 77 Reference FFT Source Key Points Push the side menu button to select the signal source. Using FFT slows down the oscilloscope’s response time in Normal acquisition mode (10k record length). A waveform acquired in Normal acquisition mode has a lower noise floor and better frequency resolution than a waveform acquired in Fast Trigger mode.
  • Page 78 Reference FFT Vertical Scale Key Points Push the side menu button to select a scale. Use the Vertical POSITION and SCALE knobs to vertically move and rescale the FFT waveform. To display FFT waveforms with a large dynamic range, use the dBV RMS scale.
  • Page 79 Reference Zooming an FFT Waveform Use the Zoom button along with horizontal POSITION and SCALE controls to magnify FFT waveforms. When you change the zoom factor, the FFT waveform is horizontally magnified about the center vertical graticule line. The FFT waveform is vertically magnified about the M marker (the math waveform reference point icon on the left edge of the display).

  • Page 80: Fft Example 1

    Reference FFT Example 1 A pure sine wave can be input into an amplifier to measure distortion; any amplifier distortion will introduce harmonics in the amplifier output. Viewing the FFT of the output can determine if low-level distortion is present. You are using a 10 MHz signal as the amplifier test signal.
  • Page 81 Reference The first component at 20 MHz (figure label 1) is the source signal fundamental frequency. The FFT waveform also shows a second-or- der harmonic at 40 MHz (2) and a fourth-order harmonic at 80 MHz (3). The presence of components 2 and 3 indicate that the system is distorting the signal.

  • Page 82: Fft Example 2

    Reference FFT Example 2 Noise in mixed digital/analog circuits can be easily observed with an oscilloscope. However, identifying the sources of the observed noise can be difficult, if not impossible. The FFT waveform displays the frequency content of the noise; you may then be able to associate those frequencies with known system frequencies, such as system clocks, oscillators, read/write strobes, display signals, switching power supplies, and so on.
  • Page 83 Reference Note the component at 31 MHz (figure label 1); this coincides with a 31 MHz memory strobe signal in the example system. There is also a frequency component at 62 MHz (figure label 2), which is the second harmonic of the strobe signal. TDS3FFT FFT Application Module User Manual...
  • Page 84 Reference TDS3FFT FFT Application Module User Manual...
  • Page 85 User Manual TDS3VID Extended Video Application Module 071-0305-01 071030501...
  • Page 87 User Manual TDS3VID Extended Video Application Module 071-0305-01 This document supports firmware version 2.00 and above.
  • Page 88 Copyright Tektronix, Inc. All rights reserved. Tektronix 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. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
  • Page 89 WARRANTY SUMMARY Tektronix 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 from an authorized Tektronix distributor. If a product proves defective within the respective period, Tektronix will provide repair or replacement as described in the complete warranty statement.
  • Page 91 ..........Contacting Tektronix .
  • Page 92 Table of Contents TDS3VID Extended Video User Manual...

  • Page 93: General Safety Summary

    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. While using this product, you may need to access other parts of the system.
  • Page 94 General Safety Summary Preventing Electrostatic Damage CAUTION. Electrostatic discharge (ESD) can damage components in the oscilloscope and its accessories. To prevent ESD, observe these precautions when directed to do so. Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components.

  • Page 95: Preface

    Preface The TDS3VID Extended Video application module provides new video-related functions to the TDS3000 series Digital Phosphor Oscilloscope. These new functions make it easier to capture, display, and measure video waveforms from both broadcast- and non-broad- cast equipment. This User Manual describes the capabilities, operation, and applications of the Extended Video application module.

  • Page 96: Contacting Tektronix

    1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tektronix.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Tektronix offers extended warranty and calibration Support programs as options on many products.

  • Page 97: Getting Started

    Getting Started This chapter describes how to install and check the TDS3VID Extended Video application module. Installing Application Module and Firmware You can install up to four application modules in the oscilloscope. Application modules go into the two slots with windows in the upper right corner of the front panel.
  • Page 98 Getting Started To install an application module and its associated oscilloscope firmware, do these steps: 1. Save any oscilloscope settings and/or reference waveforms to floppy disk before doing these steps. 2. Turn the oscilloscope power off. 3. Open the small door in the upper right corner of the front panel. 4.
  • Page 99 Getting Started 6. If the application module came with one or more floppy disks, insert the firmware upgrade floppy disk into the floppy disk drive. If there is more than one floppy disk, insert firmware upgrade floppy disk number one into the floppy disk drive. 7.

  • Page 100: Checking Module Installation

    Getting Started NOTE. If you power off the oscilloscope, eject the floppy disk, or there is a power outage during the firmware upgrade process, you must power off the oscilloscope and repeat the firmware upgrade procedure, starting at step 6, before you can use the oscilloscope. 9.

  • Page 101: Troubleshooting Module Installation

    7. Turn on the oscilloscope. If the oscilloscope now shows the application module menu items, you have a problem with one of the application module slots. Contact the nearest Tektronix service center to resolve the problem. If the oscilloscope does not show the application menu items,...

  • Page 102: Operating Basics

    Operating Basics This chapter describes the features of the Extended Video application module and how to access the extended video functions. Extended Video Features The Extended Video application module adds new video functions to your TDS3000 series oscilloscope. This section provides an overview of these new features.
  • Page 103 Operating Basics Trigger On Specific Lines (Line Select) Use the trigger on lines function to trigger the oscilloscope on specific lines in 525/NTSC, 625/PAL, and SECAM-standard video waveforms, as well as for non-broadcast (custom) video waveforms. Field Holdoff Use the field holdoff function to specify a number of fields to wait before re-enabling triggering.

  • Page 104: Accessing Extended Video Functions

    Operating Basics Accessing Extended Video Functions The following text describes how to access the new extended video functions in the menu system. Video QuickMenu To display the video QuickMenu, push the QUICKMENU panel button, then the Menu bottom button to select and display the video QuickMenu.
  • Page 105 Operating Basics QUICKMENU. To execute the video autoset function from the video QuickMenu, do these steps: 1. Push the QUICKMENU button to display the QuickMenu menu. 2. Push the MENU bottom button to select and display the video QuickMenu items. 3.

  • Page 106: Reference

    QuickMenu, push the QUICKMENU button. You cannot use video triggering to arm B triggering. The oscilloscope does not have video signal clamping. Tektronix offers an optional Video Display Clamp module (part number 013-0278-00) that provides video signal clamping.

  • Page 107: Changes To The Video Trigger Menu

    Reference Changes to the Video Trigger Menu The extended video application module adds the following functions to the Standard video trigger pop-up menu: Standard pop- Bottom menu up menu item item New/changed side menu item(s) 525/NTSC, Trigger On Line Number. Refer to page 11 for a 625/PAL, and description.
  • Page 108 Reference Default: trigger on an odd field triggers on all odd fields (example NTSC signal). Field 1 Field 2 Field 3 Field 4 Field 1 ... = Trigger points You use the Holdoff Field function to trigger the oscilloscope on the same field.
  • Page 109 Reference Custom. The Custom video menu adds a new Scan Rate bottom button that displays a side menu for selecting horizontal scan rate ranges. Custom scan rates lets you view nonbroadcast video waveforms such as those used by display monitors in the security, computer, and medical equipment industry.

  • Page 110: Changes To The Display Graticule Menu

    Reference Changes to the Display Graticule Menu The extended video application module adds the following settings to the DISPLAY Graticule menu. Bottom Side Description Graticule Displays an IRE measurement graticule ranging from –40 to +120 IRE, in 10 IRE units (1 IRE = 7.14 mV).

  • Page 111: Changes To The Acquire Menu

    Reference Changes to the Acquire Menu The extended video application module adds the following new side menu item to the Acquire Autoset menu. Side menu Description Video Autoset Executes the video autoset function to automatically display a video waveform triggered on all lines. Video QuickMenu (New) The Extended Video application module provides a QuickMenu for video functions.
  • Page 112 Reference Bottom menu Value Description MENU Scope, Displays available QuickMenus. Select Video to Video display the video QuickMenu. AUTOSET Video Automatically adjusts the vertical, horizontal, and video trigger settings to display a video waveform triggered on all lines. It also displays a video graticule and sets the vertical scale to 143 mV/division.
  • Page 113 Reference Side menu (TRIGGER) Setting Description A Trig Type Video Displays whether video triggering is enabled. Video is the only field in this side menu item. Push the side button to enable (highlight) or disable video triggering. Holdoff Time Sets the trigger holdoff time value. Use the general purpose knob to change the holdoff time value.
  • Page 114 Reference Side menu Setting Description (TRIGGER) Standard 525/NTSC Sets the oscilloscope to trigger on 525/NTSC- standard broadcast video waveforms. 625/PAL Sets the oscilloscope to trigger on 625/PAL-stan- dard broadcast video waveforms. SECAM Sets the oscilloscope to trigger on SECAM-stan- dard broadcast video waveforms. Key Points Autoset Settings.

  • Page 115: Video Example 1 (Autoset)

    Reference Component Signals. Both graticules include marks that are useful for measuring component signals. AUTOSET Lines/Fields and Trigger All Lines/All Fields. The AUTOSET Lines/Fields functions (video QuickMenu bottom menu) differ from the All Fields/All Lines side menu functions in that the AUTOSET Lines/Fields functions change the video trigger type and the oscilloscope time base.

  • Page 116: Video Example 2 (Trigger On Line)

    Reference Video Example 2 (Trigger On Line) In this example, you suspect that one or more pixels are defective in a Charge-Coupled Device (CCD) video camera. You need to determine which line in which fields contain the defective pixel(s). Do these steps: 1.

  • Page 117: Video Example 3 (Custom Video)

    Reference Video Example 3 (Custom Video) In this example, you need to display a video waveform from a computer display driver. Do these steps to display the waveform: 1. Connect the video signals to the oscilloscope using proper adapters and the 75 ohm terminator if necessary. 2.

  • Page 118: Video Example 4 (Holdoff Fields)

    Reference Video Example 4 (Holdoff Fields) In this example, you are examining a 525/NTSC video waveform. You need to examine the colorburst signal of field 1 without mixing it with the out-of-phase colorburst signal of field 3. Do these steps: 1.
  • Page 119 Reference 12. Determine which field you are triggering on. If necessary, use the Zoom button to magnify the colorburst signal. Field 1 or 4 Sync Field 2 or 3 13. If the oscilloscope is triggering on field 2, repeatedly push the SINGLE SEQ button until the colorburst waveform changes to the correct phase for field 1, and then push the RUN/STOP button to resume triggering the oscilloscope.
  • Page 120 Reference TDS3VID Extended Video User Manual...
  • Page 121 User Manual TDS3TMT Telecom Mask Test Application Module 071-0305-01 071030501...
  • Page 123 User Manual TDS3TMT Telecom Mask Test Application Module 071-0305-01 This document supports firmware version 2.00 and above.
  • Page 124 Copyright Tektronix, Inc. All rights reserved. Tektronix 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. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000...
  • Page 125 WARRANTY SUMMARY Tektronix 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 from an authorized Tektronix distributor. If a product proves defective within the respective period, Tektronix will provide repair or replacement as described in the complete warranty statement.
  • Page 127 ..........Contacting Tektronix .
  • Page 128 Table of Contents TDS3TMT Telecom Mask Test User Manual...

  • Page 129: General Safety Summary

    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. While using this product, you may need to access other parts of the system.

  • Page 131: Preface

    Preface This user manual describes the capabilities, operation, and applications of the TDS3TMT Telecom Mask Test application module. The following table shows you where to find information in this manual. If you are looking for: Turn to: Installation information Installing Application Module and Firmware on page 1 Product overview Telecom Mask Test Features on...

  • Page 132: Contacting Tektronix

    1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tektronix.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Tektronix offers extended warranty and calibration Support programs as options on many products.

  • Page 133: Getting Started

    Getting Started This chapter describes how to install and check the TDS3TMT Telecom Mask Test application module. Installing Application Module and Firmware You can install up to four application modules in the oscilloscope. Application modules go into the two slots with windows in the upper right corner of the front panel.
  • Page 135 Getting Started 6. If the application module came with one or more floppy disks, insert the firmware upgrade floppy disk into the floppy disk drive. If there is more than one floppy disk, insert firmware upgrade floppy disk number one into the floppy disk drive. 7.

  • Page 136: Checking Module Installation

    Getting Started NOTE. If you power off the oscilloscope, eject the floppy disk, or there is a power outage during the firmware upgrade process, you must power off the oscilloscope and repeat the firmware upgrade procedure, starting at step 6, before you can use the oscilloscope. 9.

  • Page 137: Troubleshooting Module Installation

    7. Turn on the oscilloscope. If the oscilloscope now shows the application module menu items, you have a problem with one of the application module slots. Contact the nearest Tektronix service center to resolve the problem. If the oscilloscope does not show the application menu items,...

  • Page 138: Operating Basics

    Operating Basics This chapter describes the features of the TDS3TMT Telecom Mask Test application module, how to access the mask test menus, and mask test concepts. Telecom Mask Test Features The TDS3TMT application module adds waveform mask testing capabilities to your TDS3000 series oscilloscope. This section provides an overview of these additional features.

  • Page 139: Accessing Telecom Mask Test Functions

    Operating Basics Test Automation You can connect the oscilloscope to do automated mask testing by using optional RS–232, GPIB, or LAN communication modules. Mask Editing You can use WaveStar Software for Oscilloscopes v2.3 to edit predefined standard masks. Accessing Telecom Mask Test Functions You can set the TDS3TMT functions from either the QuickMenu or the Utility menu.
  • Page 140 Operating Basics 3. Push the two bottom STANDARD buttons to select a mask standard. The buttons let you scroll up or down through the mask list. 4. Push the AUTOSET front-panel button to position the waveform in the mask. 5. Push the bottom and side menu buttons to set test and pass/fail parameters.
  • Page 141 Operating Basics Utility Menu Do these steps to access mask test functions from the Utility menu: 1. Push the UTILITY front-panel button to display the utility menu items. 2. Push the System bottom screen button to select Apps. 3. Push the Module bottom screen button to select Telecom. The screen displays the telecom bottom and side menu items.

  • Page 142: Reference

    Reference The TDS3TMT application module provides waveform test masks to help you quickly analyze and evaluate telecommunications equipment signals. The following sections describe the TDS3TMT application module menus. Conventions The following conventions apply to the TDS3TMT functions: You can perform multiple waveform mask testing by connecting signals to all oscilloscope input channels.

  • Page 143: Tds3Tmt Menu

    Reference TDS3TMT Menu The following table describes the TDS3TMT application module menu items. Utility Menu: System = Apps, Module = Telecom Bottom Side Description Mask Type None (Off) ITU-T standard masks. Each mask (ITU-T) DS-0 Single 64 kb/s sets the oscilloscope vertical, horizon- DS-0 Double 64 kb/s tal, and trigger controls to acquire that DS-0 Data Contradirec-...
  • Page 145 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Mask Type None (Off) Turns off mask test mode. (Custom) User Mask Sets the oscilloscope to use the User mask. The User mask is saved in non-volatile memory when the oscillo- scope is powered off.
  • Page 146 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Mask Highlight Violations When On, turns on mask violation Control highlighting. Waveforms that violate mask parameters leave highlighted points on the mask that are the color of the failing waveform. Stop On Violation When On, the oscilloscope stops mask testing on the first occurrence of a...
  • Page 147 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Mask Autofit Search Autofit repositions the waveform using Control Radius a spiral algorithm to attempt to fit the waveform to a mask. Autofit does not change oscilloscope horizontal, vertical, or trigger settings to reposition the waveform.
  • Page 148 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Pass/Fail Status: Displays pass/fail test status informa- Mask test tion: the number of waveforms that (cont.) have violated the mask per number of waveforms tested in the current test, and the number of failed tests per the total number of tests run (if Repeat on Completion is On).
  • Page 149 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Pass/Fail Number Of Waveforms Sets the number of waveforms to Mask test acquire for each pass/fail test cycle. (cont.) Use the general purpose knob to set the value. Any value above 100,000 sets the waveform count to infinity.
  • Page 150 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Pass/Fail Beep On Completion When On, causes the oscilloscope to Mask test emit a tone when the pass/fail test is (cont.) complete. Beep On Failure When On, causes the oscilloscope to emit a tone when the pass/fail test status changes from Passing to Failing.
  • Page 151 Reference Utility Menu: System = Apps, Module = Telecom Bottom Side Description Show Count Hits When On, displays the number of Results mask hits (failures) per channel and per mask segment. Enabling count hits slows down the mask test rate; if mask test speed is important, turn Count Hits Off.
  • Page 152 Reference Key Points Automated Pass/Fail Testing Process. The recommended automated pass/fail testing process is: 1. Set the oscilloscope to default settings using the SAVE/RE- CALL–>Recall Factory Setup menu. 2. Set the Graticule type to Frame (DISPLAY–>Graticule menu). 3. Select the mask standard. 4.
  • Page 153 Refer to the TDS3000 Series Programmer Manual for .isf file format information. Proper Signal Termination. Make sure to correctly terminate commu- nication test signals. Tektronix offers optional AMT75 and AFTDS adapters for correct communication signal termination. TDS3TMT Telecom Mask Test User Manual...
  • Page 154 Reference Pass/Fail Testing: Polarity. When polarity is set to both, the oscillo- scope tests the first half of all active channel acquired waveforms with positive polarity, and then inverts all active channels and tests the second half of acquired waveforms. Pass/Fail Testing: Averaging.
  • Page 155 Reference On-Screen Mask Positions. Many of the mask standards have their mask drawn on the right side of the graticule to allow enough room to the left for acquiring sufficient serial trigger data. When using the Lock Mask To Waveform feature, be careful not to move the mask too far left or else you may lose your serial trigger.
  • Page 156 Reference Autofit Key Points. The following are some Autofit-specific key points: The Autofit radius defines the size of a square search grid radius of (2 radius + 1) radius + 1) pixels, centered on the waveform position. Autofit moves the waveform using a spiral pattern, testing for mask violations at each position.
  • Page 157 Reference When Autofit runs due to a waveform violation, and if Autofit fails to find a location where the waveform fits the mask without any violations, Autofit remembers the position that resulted in the least number of mask violations. Then on subsequent acquisitions which violate the mask, Autofit changes its starting point (s) to the point where it previously found the fewest violation points.

  • Page 158: Telecom Pass/Fail Mask Test Example

    Reference Telecom Pass/Fail Mask Test Example In this example, you want to test an ITU-T telecom signal that needs to meet the E1 Coaxial Pair 2.048 Mb/s standard. You want to highlight any waveform mask errors, as well as set up pass/fail testing to test 500 waveforms, then stop.

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