Tektronix TDS5052 User Manual
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Tektronix TDS5052 User Manual

Tds5000 series digital phosphor oscilloscopes
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  • Page 1 Complimentary Reference Material This PDF has been made available as a complimentary service for you to assist in evaluating this model for your testing requirements. TMG offers a wide range of test equipment solutions, from renting short to long term, buying refurbished and purchasing new. Financing options, such as Financial Rental, and Leasing are also available on application.
  • Page 2 User Manual TDS5000 Series Digital Phosphor Oscilloscopes 071-0876-02 This document applies to firmware version 1.00 and above. www.tektronix.com...
  • Page 3 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 500, Beaverton, OR 97077 TEKTRONIX, TEKPROBE, and TEK are registered trademarks of Tektronix, Inc.
  • Page 4 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

  • Page 6: Table Of Contents

    ......Contacting Tektronix ..........
  • Page 7 Table of Contents Rear ............2- - 7 System Overview Maps .
  • Page 8 Table of Contents Triggering from the Front Panel ........3- - 54 Setting up Triggers .
  • Page 9 Table of Contents Using Spectral Math Controls ........3- - 152 Recognizing Aliasing .
  • Page 10 Table of Contents Trigger Commands ..........D- - 5 Display Commands .
  • Page 11 Table of Contents List of Figures Figure 1- -1: Locations of connectors on side and rear panels ..1- -7 Figure 1- -2: On/Standby switch location ..... . . 1- -8 Figure 1- -3: Drag area for Windows task bar .
  • Page 12 Table of Contents Figure 3- -22: Slope and level controls help define the trigger ..3- -53 Figure 3- -23: Example advanced trigger readout ....3- -62 Figure 3- -24: Violation zones for Setup/Hold triggering .
  • Page 13 Table of Contents Figure 3- -53: Time and frequency graphs for the Hanning window ..........3- -167 Figure 3- -54: Time and frequency graphs for the Kaiser-Bessel window...
  • Page 14 Table of Contents List of Tables Table 1- -1: Recommended probe cross reference ....1- -4 Table 1- -2: Additional accessory connection information ..1- -7 Table 1- -3: Instrument options .
  • Page 15 Table of Contents Table D- -1: File menu commands ......D- -1 Table D- -2: Edit menu commands .

  • Page 16: 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 17 General Safety Summary Symbols and Terms Terms 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.

  • Page 18: Preface

    Preface This is the user manual for the TDS5000 Series oscilloscope. It covers the following information: H Describes the capabilities of the oscilloscope and how to get started using the instrument H Explains how to operate the oscilloscope: how to control acquisition of, processing of, and input/output of data and information H Lists specifications and accessories of the oscilloscope About This Manual...

  • Page 19: Related Manuals And Online Documents

    Preface Related Manuals and Online Documents This manual is part of a document set of standard-accessory manuals and online documentation; this manual mainly focuses on installation, background, and user information needed to use the product features. See the following list for other documents supporting oscilloscope operation and service.

  • Page 20: Contacting Tektronix

    This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. TDS5000 Series User Manual...
  • Page 21 Preface TDS5000 Series User Manual...

  • Page 22: Product Description

    H Accessories lists the standard and optional accessories for this product. Models This manual supports three very similar oscilloscopes: H TDS5052 Digital Phosphor Oscilloscope H TDS5054 Digital Phosphor Oscilloscope H TDS5104 Digital Phosphor Oscilloscope This user manual applies to all of the above oscilloscopes: differences between the oscilloscopes are noted when necessary.

  • Page 23: Product Software

    Operating System Restore CD-ROM, a standard accessory with your oscilloscope. Do not attempt to substitute any version of Windows that is not specifically provided by Tektronix for use with your oscilloscope. (Note that older versions of the instrument may use Windows ME; contact Tektronix sales support for information about upgrading an older instrument to Windows 2000.)

  • Page 24: Firmware Upgrade

    Occasionally new versions of software for your oscilloscope may become available at our web site. See Contacting Tektronix on page xv in the Preface. Firmware Upgrade Tektronix may offer firmware upgrade kits for the oscilloscope. Contact your Tektronix service representative for more information (see Contacting Tektronix on page xv).

  • Page 25: Probes Supported

    Product Description Probes Supported Table 1- -1 lists the recommended probes for each oscilloscope. Descriptions of each probe follow the table. Table 1- 1: Recommended probe cross reference Probe TDS5052 TDS5054 TDS5104 Passive, 10X P5050 P5050 P5050 Passive, 100X P5100...

  • Page 26: Installation

    H Four compact discs that include copies of the software installed on the oscilloscope and additional support software that may be useful to you: TDS5000 Series Operating System Restore (two CDs), TDS5000 Series Product Software, and Optional Applications Software for Tektronix Windows-Based TDS Instruments. Store the product software in a safe location.

  • Page 27: Checking The Environment Requirements

    Installation Remember to fill out and send in the customer registration card. The registration card is packaged with this manual. Checking the Environment Requirements Read this section before attempting any installation procedures. This section describes site considerations, power requirements, and ground connections for your oscilloscope.

  • Page 28: Figure 1- 1: Locations Of Connectors On Side And Rear Panels

    Installation CAUTION. To avoid product damage, shut down the oscilloscope and disconnect the power cord from the power source before connecting any accessories. A USB mouse, keyboard, or other USB device can be connected or disconnected with the power on. See Shutting Down the Oscilloscope on page 1- -9. Keyboard Mouse PC SVGA Output...

  • Page 29: Powering On The Oscilloscope

    Installation Table 1- 2: Additional accessory connection information (Cont.) Item Description Rackmount For installation information, refer to the instructions that came with your rackmount kit. Other Refer to the Readme file on the TDS5000 Series Product Software CD for possible additional accessory installation information not covered in this manual.

  • Page 30: Shutting Down The Oscilloscope

    Installation Shutting Down the Oscilloscope When you push the front-panel On/Standby switch, the oscilloscope starts a shutdown process (including a Windows shutdown) to preserve settings and then go into standby mode. Avoid disconnecting the power cord to shut down the oscilloscope.

  • Page 31: Backing Up User Files

    Installation Windows 2000 Follow these steps to create the emergency startup disk for an instrument using Windows 2000: 1. Minimize the oscilloscope application by selecting Minimize in the File menu. 2. From the Windows taskbar, select Start, Programs, Accessories, System Tools, Backup.
  • Page 32 Instruments CD-ROM contains trial versions of useful programs that you can install and run five times per application. You can then purchase an upgrade from Tektronix if you decide that you want to continue to use the application. Refer to the instructions that accompany the CD-ROM for installation information.

  • Page 33: Connecting To A Network

    Upgrades and/or enabled. Follow the specific instructions that come with the option. Tektronix provides a key that you must enter (one time) to enable all options or upgrades that you have purchased. To enter the key, select the Option Installation command from the Utility menu of the oscilloscope application, and follow the on-screen instructions.

  • Page 34: Setting Up A Dual Display

    Installation 10. Use the Windows network setup utility to define the oscilloscope as a network client, and configure it for your network. You can find the network setup utility in the Windows Start menu if you select Settings > Control Panel and then double click Network.
  • Page 35 Installation 3. Connect an external monitor to the upper SVGA port on the side panel of the oscilloscope. 4. Connect the oscilloscope power cord to the power source, and power on the oscilloscope and the external monitor. 5. The oscilloscope should detect that the new monitor is connected. Follow the instructions on the oscilloscope screen to install new drivers for the monitor.
  • Page 36 Installation 5. The oscilloscope should detect that the new monitor is connected. Follow the instructions on the oscilloscope screen to install new drivers for the monitor. 6. Type Ctrl+M or select Minimize from the File menu to minimize the oscilloscope application. 7.

  • Page 37: Figure 1- 3: Drag Area For Windows Task Bar

    Installation Using Dual Display To make the best use of the new display area, do these additional steps to move the Windows controls to the external monitor: 1. Click (and hold) on the Windows task bar in the area shown in Figure 1- -3, and then drag it upwards and toward the external monitor.

  • Page 38: Adjusting Display Contrast

    Installation Adjusting Display Contrast If you find that the oscilloscope screen is too bright or too dark, use these steps to adjust the LCD display contrast to your preference. You need to have a mouse attached to perform this procedure. Windows ME If your instrument is using Windows ME, do the following steps: 1.
  • Page 39 Installation 1- 18 TDS5000 Series User Manual...

  • Page 40: Incoming Inspection

    If the oscilloscope fails any test within this section, it may need service. To contact Tektronix for service, see Contacting Tektronix on page xv of Preface. Make sure you have put the oscilloscope into service as detailed in Installation starting on page 1- -5.

  • Page 41: Self Tests

    Verify that no failures are found and reported: All tests should pass. If any failures occur, record the failure information and contact your local Tektronix service personnel for more information. e. Run the signal path compensation routine: H From the Utilities menu, select Instrument Calibration to open the Instrument Calibration control window.

  • Page 42: Functional Tests

    Incoming Inspection Functional Tests The purpose of these procedures is to confirm that the oscilloscope functions properly. The following equipment is required: H One passive 10X oscilloscope probe (P5050 or equivalent) H A 3.5 inch, 1.44 MB, formatted floppy disk to check the file system STOP.

  • Page 43: Figure 1- 4: Universal Test Hookup For Functional Tests, Ch 1 Shown

    Incoming Inspection Equipment One passive 10X oscilloscope probe (P5050 or equivalent) required Prerequisites None 1. Initialize the oscilloscope: Push the front-panel DEFAULT SETUP button. 2. Hook up the signal source: Connect the oscilloscope probe from the probe compensation terminal to the channel input that you want to test (beginning with CH 1) as shown in Figure 1- -4.

  • Page 44: Figure 1- 6: Location Of Vertical And Horizontal Scale Readouts

    Incoming Inspection 5. Set up the oscilloscope: Push the front-panel AUTOSET button. This sets the horizontal and vertical scale for a usable display and sets the trigger source to the channel you are testing. 6. Verify that the channel is operational: Confirm that the following statements are true.
  • Page 45 Incoming Inspection Horizontal/Acquisition Setup control window. Click the Acquisition tab. Click each of the five acquisition modes and confirm that the following statements are true: H Sample mode displays an actively acquiring waveform on the screen. (Note that there is a small amount of noise present on the square wave). H Peak Detect mode displays an actively acquiring waveform with the high and low values (peaks) of consecutive sample intervals displayed.

  • Page 46: Figure 1- 7: Setup For Time Base Test

    Incoming Inspection Time Base Test Equipment One passive 10X oscilloscope probe (P5050 or equivalent) required Prerequisites None 1. Initialize the oscilloscope: Push the front-panel DEFAULT SETUP button. 2. Hook up the signal source: Connect the oscilloscope probe from the probe compensation terminal to the CH 1 input as shown in Figure 1- -7.
  • Page 47 Incoming Inspection 6. Verify horizontal delay: a. Center a rising edge on screen: H Turn the HORIZONTAL POSITION knob so that the rising edge where the waveform is triggered is lined up with the center horizontal graticule. H Change the HORIZONTAL SCALE to 20 s/div. The rising edge of the waveform should remain near the center graticule, and the falling edge should be off screen.

  • Page 48: Figure 1- 8: Setup For Trigger Test

    Incoming Inspection Trigger Test Equipment One passive 10X oscilloscope probe (P5050 or equivalent) required Prerequisites None 1. Initialize the oscilloscope: Push the front-panel DEFAULT SETUP button. 2. Hook up the signal source: Connect the oscilloscope probe from the probe compensation terminal to the CH 1 input as shown in Figure 1- -8. TDS5000 oscilloscope Connect probe from PROBE COMP terminal to CH 1 input...
  • Page 49 Incoming Inspection 5. Verify that the delayed trigger system operates: Set up the delayed trigger: H From the Trig menu, select A- -B Trigger Seq to open the Trigger Setup control window. The window opens to the A→B Seq tab. H Click Trig After Time under A Then B.

  • Page 50: Figure 1- 9: Setup For The File System Test

    Incoming Inspection File System Test Equipment One passive 10X oscilloscope probe (P5050 or equivalent) required 3.5 inch, 1.44 MB, formatted floppy disk Prerequisites None 1. Initialize the oscilloscope: Push the front-panel DEFAULT SETUP button. 2. Hook up the signal source: Connect the oscilloscope probe from the probe compensation terminal to the CH 1 input as shown in Figure 1- -9.

  • Page 51: Perform The Extended Diagnostics

    Incoming Inspection 8. Verify the file system works: a. Click the Recall Setups tab in the control window. b. Click Recall under Recall Settings from File. The Recall Instrument Setup dialog box opens. c. From the Look in: drop-down list, select the 3 Floppy (A:) icon.

  • Page 52: Accessories And Options

    Additional 256 MB of PC RAM Touch-screen interface Built- - in thermal printer Acquisition memory options 2M/1M/500k on 1/2/4 channels (2M/1M on 1/2 channels on TDS5052) 8M/4M/2M on 1/2/4 channels (8M/4M on 1/2 channels on TDS5052) Mounting options K420 oscilloscope cart with mouse accessory tray...

  • Page 53: Table 1- 4: Instrument Upgrades

    Additional 4 years of repair You can order the upgrade kits shown in Table 1- -4 to extend the performance of your instrument after its initial purchase. Contact your local Tektronix represen- tative for details and the most current information.

  • Page 54: Accessories

    Accessories and Options Table 1- 4: Instrument upgrades (Cont.) TDS5UP upgrade* Description Option W2K Windows 2000 Professional Edition (contact your local Tektronix representative for details) Option CPU Upgrade to current motherboard and processor (contact your local Tektronix representative for details) Option 2A Advanced analysis—equation editor, spectral FFT, and...

  • Page 55: Table 1- 6: Optional Accessories

    Mouse 119-6298-00 Front cover 200-4651-00 Two (TDS5052) or four (TDS5054) 500 MHz 10x passive probes P5050 Optional The accessories in Table 1- -6 are orderable for use with the oscilloscope at the time this manual was published. Consult a current Tektronix catalog for additions, changes, and details.
  • Page 56 Accessories and Options Table 1- 6: Optional accessories (cont.) Accessory Part number Thermal printer (including five rolls of paper) 655-4920-xx Thermal printer paper (one roll) 016-1897-xx TDS5000 Series rackmount Kit 016-1887-xx Probe calibration, compensation, and deskew adapter (requires a sepa- 067-0405-00 rate pulse generator) Video display clamp...
  • Page 57 Accessories and Options Table 1- 6: Optional accessories (cont.) Accessory Part number WSTRO WaveStar software; remote instrument control and waveform WSTRO data acquisition TDSPWR2 power measurement software TDSPWR2 TDSDVD optical storage analysis software TDSDVD Wavewriter AWG and waveform creation software S3FT400 VocalLink voice control software VCLNKP...

  • Page 58: Operational Maps

    Operational Maps This chapter consists of several maps that describe the oscilloscope system, its operation, and documentation: H Documentation Map, on page 2- -2, lists the documentation that supports the oscilloscope. H Front Panel I/O Map, on page 2- -3, describes input/output ports and peripherals. H Front Panel Map, on page 2- -4, describes the elements of the oscilloscope front panel and cross references information relevant to each element.

  • Page 59: Documentation Map

    Documentation Map This oscilloscope ships with documents individually tailored to address specific parts of the product features and interface. The table below cross references each document to the oscilloscope features and interfaces it supports. To read about... Refer to these documents: Description Installation, Specifications, &...

  • Page 60: Front Panel I/O Map

    Front Panel I/O Map Floppy disk drive Control panel On/Standby switch Auxiliary input Channel inputs Probe Compensation terminal 2- 3 TDS5000 Series User Manual...

  • Page 61: Control Panel Map: Quick Access To Most Often Used Features

    Control Panel Map: Quick Access to Most Often Used Features Use these buttons to start and stop acquisition or start a single acquisition sequence. The ARM, READY, and TRIG’D lights show the acquisition status. Page 3- - 57. Turn the knob to adjust waveform intensity. Page 3- - 40. Push the button to turn Fast Acquisition on or off.

  • Page 62: User Interface Map - - Complete Control And Display

    User Interface Map - - Complete Control and Display Menu Bar: Access to data I/O, printing, online help system, and oscilloscope functions Status Bar: Display of acquisition status, mode, and number of acquisitions; trigger status; date; and time Buttons/Menu. Touch to toggle between toolbar and menu bar modes Multipurpose Knob...

  • Page 63: Display Map - - Single Graticule

    Display Map - - Single Graticule Drag icon to change the trigger level Drag cursors to measure waveforms on screen Drag the position icons to reposition a waveform Click the icon to assign the multipurpose knobs to waveform vertical position and scale Drag across the waveform area to create a box for zooming, enabling/disabling histograms, and...

  • Page 64: Side And Rear Panel I/O & Connectors Map

    Side and Rear Panel I/O & Connectors Map Left Side USB connectors for mouse, keyboard, or other USB devices PS-2 connectors for mouse and keyboard Upper VGA port to connect a monitor for side-by-side display Lower VGA port to connect a monitor for oscilloscope display Parallel port (Centronics) to connect printer or other device...

  • Page 65: System Overview Maps

    System Overview Maps The following sections provide a high-level description of how the oscilloscope acquires, processes, and outputs signal information. Functional Model Map Signal Processing and Output and Digital Signal Acquisition Transformation Storage Display and UI Input channels CH 1- - 4 Acquisition Amplitude system...
  • Page 66 System Overview Maps H Time base System. Triggers the Acquisition system to start an acquisition cycle. In more general terms, synchronizes the capturing of digital samples in the Acquisition system to the trigger events generated from the Trigger system. H Acquisition System. Converts and stores the analog signal to a digital format.

  • Page 67: Process Overview Map

    System Overview Maps Process Overview Map Process overview Process block description Reset The oscilloscope starts in the idle state; it enters this state Idling... Abort upon power up, upon receiving most control setting changes, Power on or upon finishing acquisition tasks. Power off Control settings are implemented as they are requested.

  • Page 68: Overview

    Overview This chapter provides a detailed description of the TDS5000 Series Digital Phosphor Oscilloscopes features. Please note the following when using this chapter: H Each section provides the background information needed to operate your oscilloscope effectively, as well as the higher-level procedures for accessing and using the features.
  • Page 69 Overview Tasks or topics Subtasks or subtopics Section title Contents Page no. Display Features Using the Display Displaying Waveforms Using display features and customizing 3- - 99 the display Using the Waveform Overview of display features and setup of 3- - 100 Display the display Customizing the Waveform...

  • Page 70: Acquiring Waveforms

    Acquiring Waveforms Before you can process a waveform, you must acquire the signal. This oscilloscope comes equipped with the features you need for capturing your waveforms before further processing them according to your requirements. The following sections cover capturing signals and digitizing them into waveform records: H Signal Connection and Conditioning: Connecting waveforms to the oscilloscope channels;...

  • Page 71: Signal Connection And Conditioning

    Acquiring Waveforms NOTE. This section describes how the vertical and horizontal controls define the acquisition of live waveforms. These controls also define how live and derived waveforms (math waveforms, reference waveforms, and so on) are displayed. Information on waveform display is found in: H Displaying Waveforms on page 3- -99.

  • Page 72: Connecting And Conditioning Your Signals 3

    BNC cables to characterize a device. The connection to the oscilloscope depends on your application. Tektronix provides a variety of probes and cables for this product. Refer to Accessories and Options on page 1- -31 for a list of TDS5000-compatible probes.
  • Page 73 Acquiring Waveforms Coupling. All oscilloscopes and probes specify a maximum signal level. (Exact limits for this instrument are provided in Appendix A, Specifications.) Do not exceed the limit, even momentarily, as the input channel may be damaged. Use external attenuators if necessary to prevent exceeding the limits. Coupling determines whether an input signal is directly connected to the input channel (DC coupling), connected through a DC blocking capacitor (AC coupling), or not connected at all (GND coupling).
  • Page 74 Acquiring Waveforms Clipped Acquired waveform Displayed waveform H Set horizontal scale, position, and resolution (record length) so that the acquired waveform record includes the waveform attributes of interest with good sampling density on the waveform. These settings define the horizontal acquisition window, described in Horizontal Acquisition Window Consider- ations on page 3- -18.

  • Page 75: Setting Up Signal Input

    Acquiring Waveforms Setting Up Signal Input Use this procedure to set scale and position parameters for input signal acquisi- tion. For more information, display online help while performing the procedure. Overview To set up signal input Control elements and resources Prerequisites The acquisition system should be set to run continuously.
  • Page 76 Acquiring Waveforms Overview To set up signal input Control elements and resources Select input Open the Vertical Setup control window by clicking Vert on the button bar or selecting the Vertical Setup coupling command from the Vertical menu. To change the input coupling, select the appropriate channel tab and click: DC to couple both the AC and DC components of an input signal.
  • Page 77 Acquiring Waveforms Overview To set up signal input Control elements and resources Set the vertical Use the vertical knobs to scale and position the waveform on screen. acquisition window Positioned vertically Scaled vertically Dragging the waveform handle also positions the waveform.
  • Page 78 Acquiring Waveforms Overview To set up signal input Control elements and resources Set the Use horizontal knobs to scale and position the waveform on the screen and to set the record length. horizontal acquisition Dragging the reference icon window also positions the waveform. Scaled horizontally Positioned horizontally The Resolution knob sets the record length and sample...

  • Page 79: Autosetting The Oscilloscope 3

    Acquiring Waveforms Autosetting the Autoset automatically sets up the oscilloscope controls (acquisition, display, Oscilloscope horizontal, trigger, and vertical) based on the characteristics of the input signal. Autoset is much faster than manual control-by-control setup. When the input signal is connected, use Autoset to automatically set up the oscilloscope: NOTE.

  • Page 80: Resetting The Oscilloscope

    Acquiring Waveforms Overview To Autoset the oscilloscope Control elements and resources Display a Select User Preferences from the Utilities menu to display the Prompt Before Action window. Click Autoset prompt to toggle between OFF and ON: OFF to immediately perform an Autoset when the AUTOSET button is pushed.

  • Page 81: Input Conditioning Background

    Acquiring Waveforms Input Conditioning This section contains background information that can help you more effectively Background set up the acquisition window of each channel. Input. Keep in mind that this oscilloscope samples in real time or random equivalent time; both sampling systems provide pretrigger information by using the trigger to stop an already running acquisition.
  • Page 82 Acquiring Waveforms The offset control subtracts a constant DC level from the input signal before the vertical scale factor is applied, and the vertical position control adds a constant number of divisions of signal after the scale factor is applied to the resulting difference.

  • Page 83: Figure 3- 3: Setting Vertical Range And Position Of Input Channels

    Acquiring Waveforms a. SCALE setting determines the vertical acquisition window size. This window is 100 mV/div x 20 divisions (10 graticule divisions and 5 divisions of position) +1.0 Volt Vertical window +0.4 Volt Graticule Channel reference indicator - - 0.4 Volt - - 1.0 Volt b.

  • Page 84: Figure 3- 4: Varying Offset Moves The Vertical Acquisition Window On The Waveform

    Acquiring Waveforms H As you vary vertical offset, the middle voltage level moves relative to zero. This moves the vertical acquisition window up and down on the waveform. With input signals that are smaller than the window, it appears the waveform moves in the window.

  • Page 85: Figure 3- 5: Horizontal Acquisition Window Definition

    Acquiring Waveforms Horizontal Acquisition Window Considerations. The oscilloscope lets you define the horizontal acquisition window, that is, set several parameters that determine the segment of an incoming signal that becomes the waveform record when acquired. (For background, read Waveform Record on page 3- -31.) These common parameters specify a horizontal acquisition window that is applied to all channels in parallel.
  • Page 86 Acquiring Waveforms Horizontal Scale vs. Record Length vs. Sample Interval vs. Resolution. These related parameters specify the horizontal acquisition window. Because the horizontal acquisition window must fit in the 10 horizontal division display, for most cases, you can set the Time Duration of the horizontal acquisition window (10 divs x the scale setting) as described below.

  • Page 87: Figure 3- 6: Common Trigger, Record Length, And Acquisition Rate For All Channels

    Acquiring Waveforms NOTE. As implied from the operation just described, Resolution and the equivalent elements, Sample Interval and Sample Rate, are derived and cannot be set directly. You can, however, check the Resolution at anytime in the resolution readout. Also note that the front-panel RESOLUTION knob actually adjusts the Record Length to increase sample density.

  • Page 88: Setting Acquisition Controls

    Acquiring Waveforms Setting Acquisition Controls This section reviews the features that start and stop data acquisitions and the features that control how the oscilloscope processes the data as it is acquired. Acquisition Modes The following acquisition modes are available: H Sample: The oscilloscope does no postprocessing of acquired samples. The first sample from each acquisition interval is saved.

  • Page 89: Controlling Acquisitions

    Acquiring Waveforms H Average: The oscilloscope processes the number of waveforms you specify into the acquired waveform, creating a running average of the input signal. This mode reduces random noise. Acquiring and displaying a noisy square wave signal illustrates the difference between the modes.

  • Page 90: Preventing Aliasing

    Acquiring Waveforms data points to the left. To stop acquiring data, push the front-panel RUN/STOP button (see Figure 3- -7). Use untriggered roll mode to continuously observe a slow process. Apply math and measurement operations after you push RUN/STOP to stop the acquisition. Untriggered Roll Mode with Single Sequence.

  • Page 91: Incompatible Modes

    Acquiring Waveforms Actual high-frequency waveform Apparent low-frequency waveform due to aliasing Sampled points Figure 3- 8: Aliasing Eliminating Aliasing. To quickly check for aliasing, slowly increase the horizontal scale (time per division setting). If the shape of the displayed waveform changes drastically or becomes stable at a faster time base setting, your waveform was probably aliased.

  • Page 92: Setting Acquisition Modes

    Acquiring Waveforms Incompatible with Control/Feature Explanation Single shot acquisition Envelope Acquisitions continue until the specified number of wave- forms have been acquired for the enveloped waveform Measurements Roll Measurements are not available until you stop acquisitions Setting Acquisition Modes Use this procedure to set the data acquisition mode and specify acquisition start/stop methods.

  • Page 93: Starting And Stopping Acquisition

    Acquiring Waveforms Overview To set acquisition modes Control elements and resources Set the Stop Push the RUN/STOP front-panel button to toggle between starting and stopping acquisitions. mode Push the SINGLE button to acquire enough waveforms to satisfy the acquisition mode. Select real- To limit the oscilloscope to real-time sampling or let it choose between real-time or equivalent-time sampling:...
  • Page 94 Acquiring Waveforms Overview To start and stop acquisition Control elements and resources Stop acquiring Push the RUN/STOP button to stop acquisition. Acquisition will also stop if triggering ceases while in normal trigger mode. Take a single Push the front-panel SINGLE button to start acquiring and acquire enough waveforms to satisfy the acquisition acquisition mode.

  • Page 95: Using Roll Mode

    Acquiring Waveforms Using Roll Mode Use the procedure that follows to set up roll mode acquisitions. Overview To set roll mode Control elements and resources Prerequisites The horizontal and vertical controls must be set up. Triggering should also be set up. Refer to page 3- - 25 for acquisition setup and page 3- - 49 for trigger setup.

  • Page 96: Acquisition Control Background

    Acquiring Waveforms Overview To set roll mode Control elements and resources Enable single Push the SINGLE button to start and acquire enough waveforms to satisfy the acquisition mode. The sequence roll acquisition mode must be either Sample or Peak Detect. mode Turn off roll To stop acquisitions in roll mode:...

  • Page 97: Acquisition Hardware

    Acquiring Waveforms Acquisition Hardware Before a signal can be acquired, it must pass through the input channel where it is scaled and digitized. Each channel has a dedicated input amplifier and digitizer as shown in Figure 3- -9; each channel can produce a stream of digital data from which the oscilloscope extracts waveform records.

  • Page 98: Sampling Modes

    Acquiring Waveforms Sampling Modes The oscilloscope acquisition system can process the data as it is acquired, averaging or enveloping the waveform data to produce enhanced waveform records. Once the waveform record exists (enhanced or not), you can use the postprocessing capabilities of the oscilloscope to further process that record: perform measurements, waveform math, and so on.

  • Page 99: Real-Time Sampling

    Acquiring Waveforms Sample interval First sampled and digitized point in record Trigger point Record length Horizontal delay Horizontal reference Horizontal position Figure 3- 11: The waveform record and its defining parameters (horizontal delay on) As Figure 3- -11 shows, the oscilloscope acquires points in order from left to right.

  • Page 100: Equivalent-Time Sampling

    Acquiring Waveforms Equivalent-time Sampling The oscilloscope uses equivalent-time sampling to extend its sample rate beyond its real-time maximum sampling rate, but only under two conditions: H Equivalent Time Auto must be selected. (Acquisition tab of the Horizontal/ Acquisition Setup control window). H The time base of the oscilloscope is set to a sampling rate that is too fast to allow it to get enough samples with which to create a waveform record using real-time sampling.

  • Page 101: Interpolation

    Acquiring Waveforms Table 3- -2 shows the time base setting(s) at which the switch from real-time sampling (RT) to equivalent-time sampling (ET) occurs for your oscilloscope. This information applies to all TDS5000 models. Table 3- 2: Sampling mode selection Channels on 3 or 4 Time base ≥800 ps/pt...

  • Page 102: Interleaving

    Acquiring Waveforms NOTE. When using either type of interpolation, you may want to set the display style so that the real samples are intensified and interpolated samples are dimmed. See Display Style on page 3- -107. Interleaving The oscilloscope can interleave its channels to attain higher digitizing rates without equivalent-time sampling.

  • Page 103: Using Fast Acquisitions

    Acquiring Waveforms H Interpolation (normal acquisition mode is used instead) H Vectors in equivalent-time sampling mode (waveforms are displayed as dots instead) H Saving nonactive waveforms H Math waveforms H Measurements Using Fast Acquisitions Consider the mode you want to use to acquire data: Automatic Selection.
  • Page 104 Acquiring Waveforms Fast Acquisitions mode increases the waveform capture rate to up to 100,000 waveforms per second, updating the waveform array many times between displays. This very fast capture rate greatly increases the probability that runts, glitches, and other infrequent events will accumulate in waveform memory. The oscilloscope then updates the display at the normal display rate.

  • Page 105: Figure 3- -15: Normal Dso Acquisition And Display Mode Versus

    Acquiring Waveforms Normal DSO Mode 1st acquired Next acquired Next acquired waveform record waveform record waveform record Dead time Dead time Dead time Waveform Waveform Waveform memory memory memory Display Updated display Updated display Fast Acquisitions Mode Acquired waveform records Waveform Waveform Waveform...

  • Page 106: Turning Fast Acquisitions On And Off 3

    Acquiring Waveforms Turning Fast Acquisitions Use this procedure to set up Fast Acquisitions mode. On and Off Overview To turn Fast Acquisitions on and off Control elements and resources Prerequisites The horizontal and vertical controls must be set up. Triggering should also be set up. Refer to page 3- - 25 for acquisition setup and page 3- - 49 for trigger setup.
  • Page 107 Acquiring Waveforms Overview To turn Fast Acquisitions on and off Control elements and resources Adjust the 10. Select the Display Setup control window Appearance tab. intensity 11. Click the Waveform Intensity AutoBright button to toggle AutoBright On and Off. On automatically sets the maximum intensity to the value of the most frequent event.

  • Page 108: Setting The Display Format

    Acquiring Waveforms Setting the Display Format The oscilloscope displays waveforms in one of three formats: YT, XY, or XYZ. Use the procedure that follows to set the display format. Overview To set display format Control elements and resources Select the Click the DISP toolbar button.

  • Page 109: Using Fastframe

    Acquiring Waveforms Overview To set display format Control elements and resources For more help Access the online help for more information on the controls described in this procedure. Table 3- 4: XY format pairs XY Pair X-Axis source Y-Axis source Ch 1 and Ch 2 Ch 1 Ch 2...

  • Page 110: Using Fastframe Acquisitions

    Acquiring Waveforms FastFrame is not compatible with the following features or modes: H Equivalent Time H Histograms H Fast Acquisitions H Average H Envelope Using FastFrame Consider the following operating characteristics when using FastFrame: Acquisitions H You can push RUN/STOP to terminate a FastFrame sequence. If any frames were acquired, they are displayed.

  • Page 111: To Set Fastframe Mode

    Acquiring Waveforms To Set FastFrame Mode Use the procedure that follows to set up FastFrame mode acquisitions. Overview To set FastFrame mode Control elements & resources Prerequisites The horizontal and vertical controls must be set up. Set up the triggering also. See page page 3- - 25 for acquisition setup &...

  • Page 112: Time Stamping Frames

    Acquiring Waveforms Overview To set FastFrame mode Control elements & resources Set frame Click Frame Count, and enter the number of frames to acquire per waveform record. count Frame count is the number of acquisitions to store in the acquisition memory of the channel. The oscilloscope will set the record length to a value greater than or equal to the product of the frame count and the frame length.
  • Page 113 Acquiring Waveforms Overview Time stamping frames Control elements & resources Prerequisites FastFrame mode should be set up as described in the previous example. Turn on FastFrame as described starting on page 3- - 44. Turn readouts In the Time Stamps controls, touch Readouts to toggle time stamp readouts on or off: on or off On displays time stamp readouts (see Figure 3- - 18)
  • Page 114 Acquiring Waveforms Overview Time stamping frames Control elements & resources Select the You may set the Selected Frame and Reference Frame as previously shown or you can set them from the FastFrame Selection Controls window. and time stamps Click Selection Controls from the Time Stamps control selection window to display the FastFrame controls.

  • Page 115: Figure 3- 18: Fastframe Time Stamp

    Acquiring Waveforms Overview Time stamping frames Control elements & resources To lock the 10. Touch the Horiz button. Select the Acquisition tab from the Horiz/Acq control window. Touch FastFrame Setup reference to display the FastFrame Setup control window. position frames Note: You can also get the FastFrame Setup control window by pushing the Set Up button on the Selection Controls window.

  • Page 116: Triggering

    Triggering To use the oscilloscope to sample a signal and digitize it into a waveform record that you want to process, you need to set up the trigger conditions. This section provides background on and procedures for using the basic elements of triggering: H Trigger Concepts: Basic principles of triggering including type, source, coupling, holdoff, mode, and so on.

  • Page 117: Triggering Concepts

    Triggering Triggering Concepts Triggers create meaningful waveforms from signal displays. (See Figure 3- -20.) This oscilloscope has simple edge triggers as well as a variety of advanced triggers. Normal trigger mode Automatic trigger mode Triggered waveform Untriggered waveforms Figure 3- 20: Triggered versus untriggered displays The Trigger Event The trigger event establishes the time-zero point in the waveform record.

  • Page 118: Trigger Types

    Triggering compatible with most probes, nor can you display the auxiliary trigger signal. Trigger Types The oscilloscope provides the following trigger type categories: H Edge triggers are the simplest and most commonly used trigger type, used with both analog and digital signals. An edge trigger event occurs when the trigger source passes through a specified voltage level in the specified direction (rising or falling signal voltage).

  • Page 119: Trigger Holdoff

    Triggering Trigger Holdoff Trigger holdoff can help stabilize triggering. When the oscilloscope recognizes a trigger event, it disables the trigger system until acquisition is complete. In addition, the trigger system remains disabled during the holdoff period that follows each acquisition. Adjust holdoff to obtain stable triggering when the oscilloscope is triggering on undesired trigger events, as shown in Figure 3- -21.

  • Page 120: Horizontal Position

    Triggering Horizontal Position Horizontal position is an adjustable feature that defines where the trigger occurs on the waveform record. It lets you choose how much the oscilloscope acquires before and after the trigger event. The part of the record that occurs before the trigger is the pretrigger portion.

  • Page 121: Triggering From The Front Panel

    Triggering Triggering from the Front Panel The front panel provides quick access to the most frequently used trigger controls. The trigger readout shows you the state of the trigger system. The SLOPE, COUPLING, and SOURCE controls only work for edge triggering. To access the advanced trigger controls, open the Trigger Setup control window by pushing the ADVANCED button (See Advanced Triggering on page 3- -62 for more information).
  • Page 122 Triggering Overview Triggering from the front panel Control elements and resources Set the trigger To manually change the trigger level for edge triggers level (or certain threshold levels for logic or pulse triggers), turn the LEVEL knob. You can also set the level in the Trigger Setup control window.
  • Page 123 Triggering Overview Triggering from the front panel Control elements and resources Set the Push the up and down arrow buttons to set COUPLING: trigger DC passes both AC and DC components of the coupling input signal. AC passes only the AC components of an input signal.

  • Page 124: Checking Trigger Status

    Triggering Checking Trigger Status To see the state and setup of the triggering circuit, use the trigger status lights, readout, and screen. Overview To check trigger status Control elements and resources Trigger status To quickly determine the trigger status, check the ARM, from trigger READY, and TRIG’D controls.
  • Page 125 Triggering Overview To check trigger status Control elements and resources Trigger level on To see the trigger level on the waveform display, turn on display a trigger level indicator (marker). See Customizing the Waveform Display on page 3- - 106 for instructions on setting the indicator.

  • Page 126: Additional Trigger Parameters

    Triggering Additional Trigger Parameters Some additional trigger parameters are accessible only through the Trigger Setup control window: H Holdoff H Trigger level presets H Force trigger H Single sequence Use the procedures that follow to set up these additional trigger parameters. For more information, display online help while performing the procedure.
  • Page 127 Triggering Overview Additional trigger parameters Control elements and resources Select a 5. Push the front-panel ADVANCED button. preset trigger On the Trigger Setup control window, select the A Event level tab. Click a Trigger Type button to select a trigger, such as Edge, that uses a level adjustment.
  • Page 128 Triggering Overview Additional trigger parameters Control elements and resources Force a trigger 14. Push the front-panel ADVANCED button. 15. On the Trigger Setup control window, select the A Event or B Event tab 16. Click Edge. 17. To force the oscilloscope to immediately acquire one waveform record, even without a trigger event, click Force Trigger.

  • Page 129: Advanced Triggering

    Triggering Advanced Triggering This section describes how to use the advanced triggers: glitch, runt, width, transition (slew rate), pattern, state, setup/hold, window, video, and timeout. You can check the advanced trigger status in the readout. The readout indicates the trigger type and then shows sources, levels, or any other parameters that are important for the particular trigger type.
  • Page 130 H The precondition for logic input channels 1 through 3 (channel 1 on TDS5052) H The direction of the state change for the clock input, channel 4 (channel 2 on the TDS5052) H The Boolean logic function: AND, NAND, OR, or NOR (not available on the TDS5052)

  • Page 131: Table 3- 5: Pattern And State Logic

    The logic inputs are channels 1, 2, 3, and 4 when using Pattern triggers. For State triggers, channel 4 becomes the clock input, leaving the remaining channels as logic inputs. (On the TDS5052, channel 2 is the clock input.) 3- 64...
  • Page 132 Triggering Setup/Hold Trigger. A setup/hold trigger occurs when a logic input changes state inside of the setup and hold times relative to the clock. When you use setup/hold triggering, you define: H The channel containing the logic input (the data source) and the channel containing the clock (the clock source) H The direction of the clock edge to use H The clocking level and data level that the oscilloscope uses to determine if a...

  • Page 133: Figure 3- -24: Violation Zones For Setup/Hold Triggering 3

    Triggering Setup/Hold violation = Setup time zone = Hold time Setup/Hold violation zone = T must be ≥ +2 ns Clock level Clock signal Setup/Hold violation zone - - T Clock level Clock signal Setup/Hold violation zone - - T Clock level Clock signal Positive T...
  • Page 134 Triggering Window Trigger. Use the Window trigger to trigger the oscilloscope when the input signal rises above an upper threshold level or falls below a lower threshold level. After setting these levels, you can specify whether you want to trigger the instrument as the signal is entering or leaving the threshold window.

  • Page 135: Triggering On A Glitch

    Triggering Triggering on a Glitch Use this procedure to detect and trigger on a glitch or to ignore a glitch. Overview To trigger on a glitch Control elements and resources Select glitch Push the front-panel ADVANCED button. triggering On the Trigger Setup control window, select the A Event tab.
  • Page 136 Triggering Overview To trigger on a glitch Control elements and resources Set mode and Mode and holdoff can be set for all standard trigger holdoff types. Refer to Select the trigger mode on page 3- - 56 and Set holdoff on page 3- - 59. To learn more about trigger mode and holdoff, see Trigger Modes on page 3- - 51 and Trigger Holdoff on page 3- - 52.

  • Page 137: Triggering On A Runt Pulse

    Triggering Triggering on a Runt Pulse Use this procedure to detect and trigger on a runt pulse. The oscilloscope can look for positive or negative runt pulses. These pulses can also be qualified by time or by the logical state of other channels. - - Overview To trigger on a runt pulse Control elements and resources...
  • Page 138 Triggering Overview To trigger on a runt pulse Control elements and resources Select the Select a Polarity value to specify the direction of the runt polarity pulse. Triggering occurs at the point the pulse returns over the first (lower) threshold going negative without crossing the second threshold level (upper).
  • Page 139 Triggering Overview To trigger on a runt pulse Control elements and resources To qualify the runt pulse trigger, click Trigger When Runt Qualify the runt and select from the list: trigger Occurs triggers on all runt pulses regardless of width. Wider triggers only on runt pulses that exceed the minimum width you set.

  • Page 140: Triggering On The Pulse Width

    Triggering Triggering on the Pulse Use this procedure to detect and trigger on a pulse that is either wider or Width narrower than the specified range. Overview To trigger based on pulse width Control elements and resources Select width Push the front-panel ADVANCED button. triggering On the Trigger Setup control window, select the A Event tab.
  • Page 141 Triggering Overview To trigger based on pulse width Control elements and resources Set mode and Mode and holdoff can be set for all standard trigger holdoff types. Refer to Select the trigger mode on page 3- - 56 and Set holdoff on page 3- - 59. To learn more about trigger mode and holdoff, see Trigger Modes on For mode and holdoff setup, see Select the trigger page 3- - 51 and Trigger Holdoff on page 3- - 52.

  • Page 142: Triggering On Transition Time 3

    Triggering Triggering on Transition Use this procedure to detect and trigger on pulse edges that traverse between two Time thresholds at faster or slower rates than the specified time. You can set up the oscilloscope to trigger on positive or negative edges. Overview To trigger on transition time Control elements and resources...
  • Page 143 Triggering Overview To trigger on transition time Control elements and resources Set the The threshold levels and the delta time setting transition time determine the transition time (slew rate) setting. The level settings determine the voltage component of slew rate (Volts/Second). Click the Upper Level or Lower Level button and use the multipurpose knobs or pop-up keypad to set the values for the upper and lower levels.

  • Page 144: Triggering On Pulse Timeout 3

    Triggering Triggering on Use this procedure to detect and trigger on pulses longer than a specified time. Pulse Timeout The oscilloscope will trigger at the end of the timeout period. Overview To trigger on pulse timeout Control elements and resources Select timeout Push the front-panel ADVANCED button.
  • Page 145 Triggering Overview To trigger on pulse timeout Control elements and resources Set the pulse To set the pulse threshold, click: threshold Stay High to trigger if the signal stays higher than the trigger level for longer than the timeout (Timer) value.

  • Page 146: Triggering On A Pattern

    Triggering Triggering on a Pattern Use this procedure to trigger the oscilloscope when the logic inputs cause the selected function to become True or False. You can also specify that the logic conditions must be satisfied for a specific amount of time before the oscilloscope triggers.
  • Page 147 Triggering Overview To trigger on a pattern Control elements and resources Set trigger From the Trigger When Pattern list, select True to trigger criteria the oscilloscope when the logic patterns are true. Select False to trigger the oscilloscope when the logic patterns are false.
  • Page 148 Triggering Overview To trigger on a pattern Control elements and resources You can time qualify a pattern logic trigger, that is, you To define a time can specify the amount of time that the Boolean logic qualified pattern trigger function must be True. You must select Less than or More Than for the Trigger When Pattern control.

  • Page 149: Triggering On Logic State

    Use this procedure to trigger the oscilloscope when all of the logic inputs to the selected logic function cause the function to be True or False when the clock (channel 4) input changes state. (The clock input is channel 2 on the TDS5052.) Overview...
  • Page 150 (The Pattern Type controls do not appear on this control window for the TDS5052 model.) See page 3- - 64 for definitions of the logic functions for pattern triggers.

  • Page 151: Triggering On Setup/Hold Time Violations 3

    Triggering Triggering on Setup/ Use this procedure to detect and trigger on setup and hold time violations. The Hold Time Violations setup and hold times define a violation region relative to a clock. Data is considered to be invalid in the violation region. Overview To trigger on setup/hold time violations Control elements and resources...
  • Page 152 Triggering Overview To trigger on setup/hold time violations Control elements and resources Set the data and To set the data transition level, click Data Level, and use clock levels the multipurpose knobs or pop-up keypad to set the value. The oscilloscope uses the clock level to determine when a clock edge occurs.

  • Page 153: Figure 3- -25: Triggering On A Setup/Hold Time Violation 3

    Triggering Cursors measure the setup/hold violation zone which equals setup time + hold time (30 ns). The oscilloscope recognizes the violation and triggers at the clock edge. Data (Ch1) transition occurs within 14.88 ns after the clock violating the hold time limit. Figure 3- 25: Triggering on a Setup/Hold time violation 3- 86 TDS5000 Series User Manual...

  • Page 154: Triggering On Window Threshold Violations 3

    Triggering Triggering on Window Use this procedure to trigger the oscilloscope when the input signal rises above Threshold Violations an upper threshold level or falls below a lower threshold level. Overview To trigger on a window threshold violation Control elements and resources Select window Push the front-panel ADVANCED button.
  • Page 155 Triggering Overview To trigger on a window threshold violation Control elements and resources To qualify the window trigger, select from these Trigger Qualify window When drop-down list combinations. Note that the Trigger trigger When controls change as you select different combinations of options.

  • Page 156: Triggering On A Video Signal

    Triggering Triggering on a Video Use this procedure to detect and trigger on a video signal. Only composite signal Signal formats are supported. Graphic display formats such as RGB and VGA are not supported. Overview To trigger on a video signal Control elements and resources Select video Push the front-panel ADVANCED button.
  • Page 157 Triggering Overview To trigger on a video signal Control elements and resources Specify where Select a value from the Trigger On drop-down list to trigger will specify where the trigger will occur on the video signal: occur on the If you select Field, use the drop-down list to select video signal either Odd, Even, or All.

  • Page 158: Sequential Triggering

    Triggering Sequential Triggering In applications that involve two or more signals, you may be able to use sequential triggering to capture more complex events. Sequential triggering uses the A (Main) trigger to arm the trigger system, and then uses the B (Delayed) trigger to trigger the oscilloscope if a specific condition is met.

  • Page 159: Figure 3- -26: Triggering With Horizontal Delay Off 3

    Triggering Triggering with Horizontal Delay Off. Figure 3- -26 compares the sequential trigger choices A Only, Trig After Time, and Trig on n Event when horizontal delay is off. Each illustration shows where pretrigger and posttrigger data is acquired relative to the trigger event. Posttrigger record Pretrigger record A (Main) Only...

  • Page 160: Figure 3- -27: Triggering With Horizontal Delay On 3

    Triggering Triggering with Horizontal Delay On. You can use horizontal delay when you want to acquire a waveform record that is separated from the trigger event by a significant interval of time. The horizontal delay function can be used with any trigger setup.

  • Page 161: Figure 3- -28: Trigger And Horizontal Delay Summary 3

    Triggering Figure 3- -28 summarizes all combinations of triggering and horizontal delay. Wait for Acquire Trigger on A Only with A (Main) posttrigger horizontal delay off trigger data Wait Trigger on A Only with user-specified horizontal delay on horizontal delay time Wait for B B trigger after delay with Wait user-specified...

  • Page 162: Triggering On A Sequence

    Triggering Triggering on a Sequence Use these procedures to set up the oscilloscope to trigger on a sequence. For more information, display online help while performing the procedure. Overview To trigger on a sequence Control elements and resources Prerequisites 1. The oscilloscope must be installed with a signal connected to an input channel.
  • Page 163 Triggering Overview To trigger on a sequence Control elements and resources To trigger on To set the time base to trigger after an A trigger and a B events specified number of B trigger events, click Trig on the toolbar, and select the A- - >B Seq tab of the Trigger Setup control window.
  • Page 164 Triggering Overview To trigger on a sequence Control elements and resources For further Access the online help for more assistance on assistance triggering commands. See page 3- - 209 for information on online help 3- 97 TDS5000 Series User Manual...
  • Page 165 Triggering 3- 98 TDS5000 Series User Manual...

  • Page 166: Displaying Waveforms

    Displaying Waveforms This oscilloscope includes a flexible, customizable display that lets you control how waveforms appear. This section discusses: H Using the Waveform Display H Customizing the Waveform Display H Using the Zoom Feature Figure 3- -29 shows how the display features fit into the overall oscilloscope operation.

  • Page 167: Using The Waveform Display

    Displaying Waveforms Using the Waveform Display Display Elements The waveform shown below is displayed as part of the user interface (UI) application. Some terms that are useful in discussing the UI follow. (4) Horizontal reference (2) Graticule (1) Display (3) Horizontal scale readout Figure 3- 30: Display elements (1) The Display is the area where the waveforms appear.

  • Page 168: Acquisition Preview

    Displaying Waveforms Acquisition Preview The acquisition preview attempts to show what the next acquisition will look like when the acquisition is delayed due to slow triggers or long acquisition duration, or the acquisitions have stopped. Acquisition preview recalculates math waveforms, but does not represent changes in trigger levels, trigger modes, or different acquisition modes.
  • Page 169 Displaying Waveforms Display Operations In general, the method of adjusting (vertically scaling, offsetting, positioning, and so on) the waveform display is from the front-panel vertical SCALE and POSITION knobs. Note that math and reference waveforms are scaled and positioned from their setup control windows. Graticules.

  • Page 170: Figure 3- -31: Horizontal Position Includes Time To Horizontal Reference Point 3

    Displaying Waveforms Horizontal Position and the Horizontal Reference Point. The time value you set for horizontal position is measured from the trigger point to the horizontal reference point. This is not the same as the time value from the trigger point to the start of the waveform record, unless you set the horizontal reference to 0%.

  • Page 171: Displaying Waveforms In The Main Graticule 3

    Displaying Waveforms Displaying Waveforms in This procedure demonstrates the display adjustments you can make. the Main Graticule Overview To display waveforms in the main graticule Control elements and resources Prerequisites The oscilloscope must be installed with a signal connected to an input channel. Set the acquisition system to RUN.
  • Page 172 Displaying Waveforms Overview To display waveforms in the main graticule Control elements and resources Horizontal reference Adjust the To adjust the point around which the waveform expands and contracts, click on the horizontal horizontal reference marker and drag it along the horizontal axis reference until it aligns to the point on the waveform that you want to be stationary on screen.

  • Page 173: Customizing The Waveform Display

    Displaying Waveforms Customizing the Waveform Display Using Display Controls Read this section to learn how to to display waveforms according to your preferences. Display Settings. Table 3- -7 lists customizable display elements and their points of access. Table 3- 7: Customizable display elements Display attribute Access Options...
  • Page 174 Displaying Waveforms Table 3- 7: Customizable display elements Display attribute Access Options Display Style Display menu Display Style submenu Vectors display waveforms with lines drawn between commands record points. Dots display waveform record points as dots on the Dots display waveform record points as dots on the screen.
  • Page 175 Displaying Waveforms Table 3- 7: Customizable display elements Display attribute Access Options Math Colors Display menu Colors command Default uses the default system color (red) for math waveforms. Inherit uses the same color for the math waveform as Display Setup control window Colors tab the waveform the math function is based on.
  • Page 176 Displaying Waveforms Table 3- 7: Customizable display elements Display attribute Access Options Date and Time Display menu Objects command Toggle the display of the date and time on the graticule. To set the time and date, use the Utilities menu Set Time & Date command. Display menu Display Date &...

  • Page 177: Using The Zoom Feature

    Displaying Waveforms Using the Zoom Feature Use the oscilloscope Zoom feature to magnify an acquisition vertically, horizontally, or in both dimensions to let you see the fine detail in your signals without changing the acquisition parameters (sample rate, record length, and so on).
  • Page 178 Displaying Waveforms Overview To zoom in on waveforms Control elements and resources Select Zoom Click with the left mouse button, and drag across the segment of the waveform that you want to see in greater detail. Release the mouse button, and select Zoom from the pop-up menu to magnify the highlighted waveform segment.
  • Page 179 Displaying Waveforms Overview To zoom in on waveforms Control elements and resources Focus the Push the front-panel ZOOM HORIZ or VERT button to select the axis that you want to focus on in the zoom Zoom on graticule. The Zoom control window opens, if it is not waveform(s) already present.
  • Page 180 Displaying Waveforms Overview To zoom in on waveforms Control elements and resources Check the 11. To quickly determine the magnification factor and position of a zoomed waveform, check the readouts on Zoom scale the appropriate tab (Horizontal or Vertical) of the Zoom and position Setup control window.
  • Page 181 Displaying Waveforms 3- 114 TDS5000 Series User Manual...

  • Page 182: Measuring Waveforms

    Measuring Waveforms The oscilloscope features cursors and automatic measurements to assist you in analyzing your waveforms. This section describes these tools: H Taking Automatic Measurements describes how to set up the oscilloscope to automatically measure and display a variety of waveform parameters. H Taking Cursor Measurements describes using cursors to make amplitude and timing measurements on waveforms.

  • Page 183: Using Automatic Measurements

    Measuring Waveforms Customized Measurements. Choose the measurement method to control how your waveform data is characterized. See High/Low Method on page 3- -117 and Reference Levels Method on page 3- -117. Statistics on Measurement Results. To see how automatic measurements vary statistically, you can display the Min, Max, Mean, and Standard Deviation of the measurement results.

  • Page 184: Figure 3- -33: High/Low Tracking Methods 3

    Measuring Waveforms High/Low Method. The levels that the automatic measurement system derives as the High (top) or Low (bottom) for a waveform influence the fidelity of amplitude and aberration measurements. Select among the modes the oscilloscope provides for determining these levels: H Histogram sets the values statistically.

  • Page 185: Figure 3- -34: Reference Level Calculation Methods 3

    Measuring Waveforms Reference level calculation methods High (50 mV) High reference 40 mV 0 mV Mid reference (0 mV) - - 40 mV Low reference Low (- - 50 mV) Figure 3- 34: Reference level calculation methods The High and Low levels from which the reference levels are calculated are the levels established using the selected High/Low method described on page 3- -117.

  • Page 186: Taking Automatic Measurements 3

    Measuring Waveforms Taking Automatic Use this procedure to quickly take a measurement based on the default settings Measurements for High and Low reference levels. Overview To take automatic measurements Control elements and resources Prerequisites The oscilloscope must be installed and operating, with a signal connected to an input channel, and horizontal and vertical controls and triggering set up.
  • Page 187 Measuring Waveforms Overview To take automatic measurements Control elements and resources Remove To remove the measurement, click Clear. The last measurement on the list is removed. To remove any measurements measurement, click the name on the Measurements list to highlight the measurement ,and click Clear. You can also click and drag to select and clear several measurements.
  • Page 188 Measuring Waveforms Overview To take automatic measurements Control elements and resources 12. From the toolbar, click Meas to open the Measurement Setup control window. measurement reference 13. From any tab on the Measurement Setup control levels window, click Setup Ref Levs to open the Reference Levels setup control window.

  • Page 189: Localizing A Measurement

    Measuring Waveforms Overview To take automatic measurements Control elements and resources Take a 17. Select the Snapshot command from the Measure menu, or open the Measurement Setup control window and snapshot of click Snapshot on any tab. A window showing all single measurements waveform measurements opens.
  • Page 190 Measuring Waveforms Overview To gate a measurement Control elements and resources Enable & To select how to define the gated area, click Measure- ment Gating: position the gates Gate G1 Gate G2 Cursor to set the gated area to the area between the cursors.

  • Page 191: Taking Cursor Measurements

    Measuring Waveforms Taking Cursor Measurements Cursor Types Because cursor measurements give immediate feedback on the amplitude or time values they measure, they are usually quick to take and are more accurate than graticule measurements. Also, since you can position cursors wherever you want them on the waveform, they are easier to localize to a waveform segment or feature than automatic measurements.

  • Page 192: Using Cursors

    Measuring Waveforms Using Cursors To use cursors, simply move the cursors on screen and read the results in the cursor readouts. The following key points will help you use the cursors effectively. Cursor Types. The cursor types are described in Table 3- -8 on page 3- -124. There are two cursors displayed for all types, Cursor 1 and Cursor 2.

  • Page 193: Table 3- 9: Cursor Units

    Measuring Waveforms Horizontal reference = 0% First point in record Trigger point of cursor source Horizontal divisions Delay Cursor readout (tn) = Cursor × sec/div Figure 3- 35: Components determining Time cursor readout values Note that a vertical cursor readout includes and varies directly with the Delay time, which varies directly with the horizontal position set for the timebase.
  • Page 194 Measuring Waveforms Changing Cursor Positions. Change cursor positions by using the position controls in the Cursor Setup control window, dragging the cursor into position using the touch screen or mouse, or by turning the front-panel multipurpose knobs. NOTE. To make small changes with the multipurpose knobs, push the FINE button before turning the knobs.

  • Page 195: Setting Cursor Sources

    Measuring Waveforms Setting Cursor Sources Use this procedure to target the cursors to a source. Overview To set the cursor sources Control elements and resources Prerequisites Display the waveform(s) to be measured on the screen. See page 3- - 100 for information on displaying waveforms Access cursor Push the CURSORS front-panel button, or click Cursors on the toolbar to open the Cursor Type Setup control...
  • Page 196 Measuring Waveforms Overview To set the cursor sources Control elements and resources Change the To change the position of a cursor, use the multipurpose knobs, enter a numeric value in the Cursn Pos controls, cursor or click and drag the cursors to a new position. position Set cursor To change the cursor tracking mode, click Setup on the...

  • Page 197: Using Histograms (Optional)

    Measuring Waveforms Using Histograms (Optional) The oscilloscope can display histograms constructed from the selected waveform data. You can display both vertical (voltage) and horizontal (time) histograms, but only one at a time. Use histogram measurements to get statistical measure- ment data for a section of a waveform along one axis. NOTE.

  • Page 198: Figure 3- -36: Horizontal Histogram View And Measurement Data 3

    Measuring Waveforms Histogram measurements Horizontal histogram Figure 3- 36: Horizontal histogram view and measurement data 3- 131 TDS5000 Series User Manual...

  • Page 199: Starting And Resetting Histogram Counting

    Measuring Waveforms Starting and Resetting Use this procedure to quickly take a measurement based on the default settings Histogram Counting for histograms. Overview To start and reset histogram counting Control elements and resources Prerequisites Display the waveform(s) to be measured on the screen. See page 3- - 100 for information on displaying waveforms.

  • Page 200: Histogram Measurements

    Measuring Waveforms Overview To start and reset histogram counting Control elements and resources Select histogram Click a Histogram Scaling option: scale Linear displays histogram data linearly. Bin counts smaller than the maximum counts are scaled linearly by dividing the bin count by the maximum bin count.
  • Page 201 Measuring Waveforms 3- 134 TDS5000 Series User Manual...

  • Page 202: Creating And Using Math Waveforms

    Creating and Using Math Waveforms Once you have acquired waveforms or taken measurements on waveforms, the oscilloscope can mathematically combine them to create a waveform that supports your data-analysis task. For example, you might have a waveform clouded by background noise. You can obtain a cleaner waveform by subtracting the background noise from your original waveform.

  • Page 203: About Math Waveforms

    Creating and Using Math Waveforms Normal waveform of an impulse response FFT waveform of the magnitude response FFT waveform of the phase response Figure 3- 38: Spectral analysis of an impulse About Math Waveforms Purpose This oscilloscope supports mathematical combination and functional trans- formations of waveforms it acquires.

  • Page 204: Table 3- 10: Functions Available In Standard Math And Advanced Math

    H Functional transformations of waveforms, such as integration, differenti- ation, and so on. H Spectral analysis of waveforms, such as testing impulse response. You can create up to four math waveforms (two for the TDS5052); see Using Math on page 3- -138 for more examples. Standard Math versus...

  • Page 205: Other Uses For Math Waveforms

    Creating and Using Math Waveforms Other Uses for Math Measurement scalars can be used in math expressions. For example, you can Waveforms measure the average of a waveform (using the measurement capabilities of the instrument) and subtract it from the original waveform to define a new math waveform.
  • Page 206 Creating and Using Math Waveforms Table 3- 11: Math expressions and the math waveforms produced (Cont.) To. . . Enter this math expression. . . and get this math waveform. . . simulate AC coupling . . . AC component removed before integration Source waveform AC integration math waveform 1.05 V...
  • Page 207 Creating and Using Math Waveforms Basic dual waveform math is performed from the Math Setup control window by simply selecting the first waveform, the operand, and the second waveform. Click Apply to display the math waveform in the graticule. The syntax that follows describes valid math expressions for advanced math using the Equation Editor: <MathWaveform>...

  • Page 208: Figure 3- -40: Derivative Math Waveform 3

    Creating and Using Math Waveforms The math waveform, derived from the sampled waveform, is computed based on the following equation: = (X − X (n+1) Where: X is the source waveform Y is the derivative math waveform T is the time between samples Since the resultant math waveform is a derivative waveform (See Figure 3- -40), its vertical scale is in volts/second (its horizontal scale is in seconds).

  • Page 209: Figure 3- -41: Peak-Peak Amplitude Measurement Of A Derivative Waveform 3

    Creating and Using Math Waveforms Figure 3- 41: Peak-peak amplitude measurement of a derivative waveform Offset, Position, and Scale. The settings that you make for offset, scale, and position affect the math waveform you obtain. Here are some tips for obtaining a good display: H Scale and position the source waveform so that it is contained on the screen.
  • Page 210 Creating and Using Math Waveforms Where: x(i) is the source waveform y(n) is a point in the integral math waveform scale is the output scale factor T is the time between samples Since the resultant math waveform is an integral waveform, its vertical scale is in volt-seconds (its horizontal scale is in seconds).
  • Page 211 Creating and Using Math Waveforms Creating a Math Waveform Use this procedure to create a math waveform using Dual Waveform math. If you have purchased the Advanced Analysis option (TDS5UP Option 2A), use the subsequent procedure beginning on page 3- -145. Overview To create a math waveform Control elements and resources...

  • Page 212: Creating A Math Waveform

    Creating and Using Math Waveforms Overview To create a math waveform Control elements and resources For further Access the online help for more assistance on using math waveforms. assistance See Accessing Online Help on page 3- - 209 for overview of the online help system. Creating a Math Waveform Use this procedure to create a math waveform using the Advanced Analysis (Optional)
  • Page 213 Creating and Using Math Waveforms Overview To create a math waveform Control elements and resources Define or edit Use the Equation Editor control window to define a math expression. See Table 3- - 11 on page 3- - 138 for an expression examples, and use these guidelines: Math definitions are not implemented if the sources...

  • Page 214: Operations On Math Waveforms

    Creating and Using Math Waveforms Overview To create a math waveform Control elements and resources Apply 10. Click Avgs to open the Math Parameters control window. The controls in the window apply to the math waveform averaging defined by the expression. 11.

  • Page 215: Displaying And Measuring Math Waveforms 3

    Creating and Using Math Waveforms NOTE. Each math waveform that you create derives its horizontal scale and position from the sources you include in its math expression. You can adjust these controls for the source waveforms and your adjustments are reflected in the math waveform.
  • Page 216 Creating and Using Math Waveforms Overview To use math waveforms Control elements and resources Set scale and Click Position and Scale and use the multipurpose knobs or pop-up keypad to size and position the position waveform on the screen. Keep in mind the following: The position is in divisions, so changing the scale can make the math waveform disappear until position is also changed (the same effect happens...
  • Page 217 Creating and Using Math Waveforms Overview To use math waveforms Control elements and resources Take cursor 10. Click the Cursor toolbar button to display the cursors and open the Cursor control window. measurements 11. Select the Math tab, and click the numbered button for the math waveform that you want to measure.

  • Page 218: Defining Spectral Math Waveforms

    Creating and Using Math Waveforms Defining Spectral Math Waveforms The math capabilities of the oscilloscope include waveform spectral analysis. This section describes how you can control the analysis intuitively with time domain and frequency domain controls. These controls merge the time domain controls with the frequency domain controls to provide a complete spectral analyzer.

  • Page 219: Using Spectral Math Controls

    Creating and Using Math Waveforms H Multiple Analyzer Control Locks: Up to four spectral analyzers may be used simultaneously. They may all be assigned to different gates on the same source waveform or to different channel sources. The controls of Math1 and Math2 may be locked, and the controls of Math3 and Math4 may be locked.

  • Page 220: Figure 3- -42: Duration And Resolution Control Effects 3

    Creating and Using Math Waveforms Resolution 0 04 ms Adjust Duration via Adjust Duration via record length sample rate Record length 25 Duration 1 ms Record length 25 Resolution 0.04 ms Record length 50 Resolution 0.03 ms Duration 2 ms Duration 2 ms Resolution 0.02 ms Record length 100...

  • Page 221: Figure 3- -43: Definition Of Gate Parameters 3

    Creating and Using Math Waveforms Duration Zero phase reference Gate position Gate Time domain acquisition Gate width Trigger position Frequency domain samples Figure 3- 43: Definition of gate parameters The gate must reside within the duration interval of the source waveform. If the source waveform duration is adjusted, and the gate position and width would result in the gate being outside of that duration, then the gate position or width is set within the limits.
  • Page 222 Creating and Using Math Waveforms Center: This is the frequency at the center of the spectral waveform. Center is equal to the start frequency plus one half of the span. The adjustment range depends on the sample rate and the current span setting. Remember that the span must always be in the interval of zero to one half of the sample rate.

  • Page 223: Figure 3- -44: Effects Of Frequency Domain Control Adjustments 3

    Creating and Using Math Waveforms Center frequency is 1.0 and span is 0.5. Gate width= 200 Increase the center frequency. Decrease the center frequency. Set center frequency back to 1 and decrease the Span. Decrease the Span again. Increase resolution by reducing Resolution BW (increasing the gate length).

  • Page 224: Figure 3- -45: Effects Of Adjusting The Reference Level 3

    Creating and Using Math Waveforms Using the magnitude controls. Vertical units can be either linear or log. You may select these choices by clicking the Math menu button. Then select the Spectral Analysis Setup command. On the Mag tab, select the desired scale type from Linear, dB, or dBm.

  • Page 225: Figure 3- -46: Effects Of Adjusting The Reference Level Offset Control . 3

    Creating and Using Math Waveforms waveform reference marker. This moves the waveform without changing the Reference Level control setting. Sometimes it is beneficial to adjust this control so that the peak of a fundamental is at zero dB. Then you can measure other harmonics in terms of how many dB they are away from the fundamental.

  • Page 226: Figure 3- -47: Example Of The Effects Of Setting The Phase Suppression Threshold 3

    Creating and Using Math Waveforms display from +180 to - -180 degrees. Phase unwrap will display the correct result by unwrapping the phase. Phase unwrap is only valid when the phase spectrum is a continuous function of frequency. Therefore, do not use it when analyzing the harmonic content of the typical repetitive signal.
  • Page 227 Creating and Using Math Waveforms Impulse Response Testing: When performing impulse response testing of a system, place the impulse at the zero-phase reference position of the acquisition. This produces a correct phase display. Because the Tek Exponential window has its zero phase reference position at the 20% point, more of the impulse response is captured.

  • Page 228: Table 3- 13: Window Characteristics

    Creating and Using Math Waveforms Source waveform Waveform data points × Point-by-point multiply Window function (Hanning) Waveform after windowing With windowing Figure 3- 48: Windowing the time domain record Accurate magnitude measurements require that the input source waveform be stationary within the gated region. This means that waveform parameters such as frequency and amplitude should not change significantly as a function of time within the gate region that is input to the spectral analyzer.
  • Page 229 Creating and Using Math Waveforms Table 3- 13: Window characteristics (Cont.) Nearest Zero phase Window 3 dB BW in bins Scallop loss side lobe reference Coefficients 1.92 0.81 dB - - 92 dB 0.35875, 0.48829, 0.14128, Blackman-Harris 0.01168 0.76 dB - - 79 dB a = 3.75 (not cosine series) Gaussian...

  • Page 230: Figure 3- -49: Example Of Scallop Loss For A Hanning Window Without Zero Fill 3

    Creating and Using Math Waveforms Hanning scallop loss is 1.42 dB - - 1 - - 2 - - 3 - - 4 - - 5 - - 6 - - 7 - - 8 - - 9 - - 10 Frequency bins Figure 3- 49: Example of scallop loss for a Hanning window without zero fill Nearest Side Lobe: This is the difference in magnitude between the spectral lobe...

  • Page 231: Figure 3- -50: Time And Frequency Graphs For The Gaussian Window 3

    Creating and Using Math Waveforms Gaussian Window: This is the default window function (see Figure 3- -50). It is unique in that the time-domain shape of an exponential Gaussian function transforms into a Gaussian exponential shape in the frequency domain. This window provides optimal localization in both the time and the frequency domain.

  • Page 232: Figure 3- -51: Time And Frequency Domain Graphs For The Rectangular Window 3

    Creating and Using Math Waveforms Rectangular Window: This window is equal to unity (see Figure 3- -51). This means the data samples in the gate are not modified before input to the spectral analyzer. This window has the narrowest resolution bandwidth of any of the windows, but it also has the most spectral leakage and the highest side lobes.

  • Page 233: Figure 3- -52: Time And Frequency Graphs Of The Hamming Window 3

    Creating and Using Math Waveforms Hamming Window: This window is unique in that the time domain shape does not taper all the way to zero at the ends. This makes it a good choice if you wanted to process the real and imaginary parts of the spectrum off line and inverse transform it back to the time domain.

  • Page 234: Window 3

    Creating and Using Math Waveforms Hanning, Kaiser-Bessel, and Blackman-Harris Windows: These windows have various resolution bandwidths and scallop losses (see figures 3- -53, 3- -54, and 3- -55). Choose the one that best allows you to view the signal characteristics you are interested in.

  • Page 235: Figure 3- -54: Time And Frequency Graphs For The Kaiser-Bessel Window 3

    Creating and Using Math Waveforms Amplitude Time - - 67 dB side lobe - - 40 - - 80 Frequency bins Figure 3- 54: Time and frequency graphs for the Kaiser-Bessel window 3- 168 TDS5000 Series User Manual...

  • Page 236: Figure 3- -55: Time And Frequency Graphs Of The Blackman-Harris Window 3

    Creating and Using Math Waveforms Amplitude Time - - 92 dB side lobe - - 40 - - 80 Frequency bins Figure 3- 55: Time and frequency graphs of the Blackman-Harris window Flattop2 Window: This window has the lowest scallop loss of any of the windows.

  • Page 237: Figure 3- -56: Time And Frequency Domain Graphs For The Flattop2 Window 3

    Creating and Using Math Waveforms Amplitude Time - - 90 dB side lobe - - 40 - - 80 - - 120 Frequency bins Scallop loss is 0.0065 dB - - 0.05 - - 0.1 Frequency bins Figure 3- 56: Time and frequency domain graphs for the Flattop2 window 3- 170 TDS5000 Series User Manual...

  • Page 238: Figure 3- -57: Tek Exponential Window In The Time And The Frequency Domains 3

    Tek Exponential Window: The Tek Exponential window was invented at Tektronix. In the time domain, it is not a symmetrical bell shape as is the case with the other windows. Instead, it is exponential with a peak at the 20% position of the time domain gate.

  • Page 239: Recognizing Aliasing

    Creating and Using Math Waveforms There are only two samples per cycle of a signal that have a frequency equal to one half of the sample rate. This is the highest nonaliased signal that can be output from the spectral analyzer. Thus, at this frequency, one sample of acquisition jitter will show up in the spectrum as 180 degree phase variations.

  • Page 240: Figure 3- -58: How Aliased Frequencies Appear In A Spectral Waveform 3

    Creating and Using Math Waveforms Nyquist frequency ( sample rate) 0 Hz Frequency Aliased frequencies Actual frequencies Figure 3- 58: How aliased frequencies appear in a spectral waveform If you have a variable-frequency signal source, another way to observe aliasing is to adjust the frequency slowly while watching the spectral display.

  • Page 241: Selecting A Predefined Spectral Math Function (Optional)

    Creating and Using Math Waveforms Selecting a Predefined Use the procedure that follows to define the current waveform as a spectral Spectral Math Function magnitude waveform or a spectral phase waveform. (Optional) Overview To select a predefined spectral math function Control elements and resources Prerequisites The source that you want to use must be available.

  • Page 242: Defining A Spectral Math Waveform 3

    Creating and Using Math Waveforms Defining a Spectral Math Use this procedure to define a spectral math waveform. If you have purchased Waveform the Advanced Analysis option (TDS5UP Option 2A), use the subsequent procedure beginning on page 3- -176. Overview To define a spectral math waveform Control elements and resources Prerequisites...

  • Page 243: Defining A Spectral Math Waveform (Optional) 3

    Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Select the To select the window type,click Window Type and select from the list. A discussion of the FFT window types window type begins on page 3- - 160. Redefine the To redefine your waveform, click Clear and repeat the above steps.
  • Page 244 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Select a Click Mathn and select the math waveform that you want to create from the list. spectral waveform Click Magnitude to create a magnitude spectral waveform or Phase to create a phase spectral waveform.
  • Page 245 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Set the Select the Mag tab. magnitude To select the vertical scale factor, click Scale: scale dB to display magnitude using the log scale, expressed in dB relative to the reference level offset.
  • Page 246 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Set the phase 12. Select the Phase tab. scale 13. To select the vertical scale factor click Scale: Degree to set the phase units to degrees. Phase is displayed using degrees as the scale, where degrees wrap from - - 180_ to +180_.
  • Page 247 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Select the 18. To select the window type,click Window Type and select from the list. A discussion of the FFT window types window type begins on page 3- - 160.
  • Page 248 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Set the time 22. The Time domain controls determine the sample rate and record length of the acquisition. These controls domain allow you to change the duration on the acquisition controls without changing the sample rate.
  • Page 249 Creating and Using Math Waveforms Overview To define a spectral math waveform Control elements and resources Take cursor 26. From the toolbar, click the Cursors button to display the cursors and open the Cursor control window. measurements 27. Select the Math tab and click the channel button for the spectral waveform that you want to measure.

  • Page 250: Data Input/Output

    Data Input/Output This section describes the input and output capabilities of your oscilloscope: H Saving and Recalling Setups on page 3- -183 H Saving and Recalling Waveforms on page 3- -189 H Exporting and Copying Waveform Data on page 3- -196 H Printing Waveforms on page 3- -205 H Remote Communication on page 3- -207 Saving and Recalling Setups...

  • Page 251: Figure 3- -59: Auto-Increment File Name Feature 3

    Data Input and Output H Math waveforms. Control settings and the math expression are retained but not the waveform data. Upon setup recall, however, the math waveform expressions are applied, but math waveform data is not restored. H User options stored in the Windows registry. These include all options set in the User Preferences control window.

  • Page 252: Saving A Setup 3

    Data Input and Output For example, if you are saving a series of rise time data files, you can use “Risetime” as the base file name. Your first file is saved as Risetime000.ext. The next file will be Risetime001.ext, and so on. If Count reaches 999, it is suggested that you change the base file name to Basefilename1 (for example, Risetime1) on the next save.
  • Page 253 Data Input and Output Overview To save a setup Control elements and resources Name the Name your setup file by either: setup Accepting the default name (User) that appears in the name field. Double-clicking in the name field and using the pop-up keyboard to enter a new name default file name.

  • Page 254: Recalling A Setup 3

    Data Input and Output Recalling a Setup Use this procedure to recall a setup. Remember that recalling a setup replaces the existing setup, which is lost. Overview To recall a setup Control elements and resources Prerequisites The oscilloscope must be powered on, and you must have access to a previously saved setup.
  • Page 255 Data Input and Output Overview To recall a setup Control elements and resources Recall the To open the Recall Instrument Setup dialog box, click Recall. setup from a file Use the Look in: drop down list and buttons to navigate to the directory which contains a setup that you want to recall.

  • Page 256: Saving And Recalling Waveforms

    Data Input and Output Saving and Recalling Waveforms This oscilloscope can save any number of waveforms, limited only by the space that you have to store them. By saving a waveform, you can recall it at a later time for comparison, evalua- tion, and documentation.

  • Page 257: Saving A Waveform 3

    Data Input and Output Saving a Waveform Use this procedure to save a waveform or waveforms to a reference location, the oscilloscope hard disk, a floppy disk, or third-party storage device. Overview To save a waveform Control elements and resources Prerequisites The oscilloscope must be powered up.
  • Page 258 Data Input and Output Overview To save a waveform Control elements and resources Save the To save the waveform to a file, click Save Wfm to File Save. waveform to a file Use the Save in: drop-down list and buttons to navigate to the directory in which to save your waveform.

  • Page 259: Recalling A Waveform 3

    Data Input and Output Recalling A Waveform Use the procedure that follows to recall a waveform to a reference. You can only recall waveforms into references. NOTE. Reference waveforms cannot be recalled because they are already resident on the oscilloscope. However, you can copy a reference waveform to another reference: first display the reference to be copied, and then use the Saving a Waveform procedure (page 3- -190) to save it to another reference (Ref1-Ref4).
  • Page 260 Data Input and Output Overview To recall a waveform Control elements and resources Recall a Click Recall Refx from File Recall to open the Recall Reference Waveform dialog box. reference waveform from a file Use the Look in: drop-down list and buttons to navigate to the directory which contains the waveform that you want to recall.

  • Page 261: Clearing References 3

    Data Input and Output Clearing References You can clear individual references or delete waveform files. Use this procedure when you are certain that you no longer need the data in these files. To clear all references and setups, use the Utilities menu Tek Secure Erase command. Overview To clear references Control elements and resources...
  • Page 262 Data Input and Output Overview To clear references Control elements and resources Delete a To open the Delete Reference Waveform dialog box, click Delete Wfm File Delete. reference waveform file The Delete Reference Waveform dialog box allows navigation to directories, lists waveform files in the directory, and provides for selection of a waveform file.

  • Page 263: Exporting And Copying Waveform Data

    Data Input and Output Exporting and Copying Waveform Data This oscilloscope also supports exporting waveform data to a file. The oscilloscope can export waveforms, images, and measurements in several formats. You can also copy waveform data to the Windows clipboard for use with other applications, such as spreadsheets or math analysis applications.
  • Page 264 Data Input and Output H The third header value holds the trigger position (expressed as an index in the data position). H The fourth header value refers to the fractional trigger position. Also note that the delimiters are carriage returns. Exporting Waveform Data Use this procedure to export waveforms, images, or measurements to the oscilloscope hard disk, a floppy disk, or third party storage device.
  • Page 265 Data Input and Output Overview To export waveform data Control elements and resources Set image Select a color Palette for your exported images. export options Select the imageView: to export an image of the entire screen, select Full-screen; to select an image of the selected graticule, select Graticule(s) only.
  • Page 266 Data Input and Output Overview To export waveform data Control elements and resources 16. Select the Measurements tab. measurement 17. Select the data format for the measurement that you export options want to export. 18. Select Displayed Measurements to export all measurements that are displayed on screen, or Measurements Snapshot to export the current snapshot data.

  • Page 267: Using An Exported Waveform 3

    Data Input and Output Using an How you use the exported waveform depends on your application. The following Exported Waveform example is a simple application; the procedure is general and may require adapting for your spreadsheet or other data-analysis tool. Overview To use exported waveforms Control elements and resources...
  • Page 268 Data Input and Output Overview To use exported waveforms Control elements and resources Begin your Click on the row number to select the entire row containing your imported waveform values. chart Select the Chart button from the toolbar or from the Insert menu.

  • Page 269: Copying Waveform Data

    Data Input and Output Overview To use exported waveforms Control elements and resources For further For more help on exporting waveforms, touch the Help button in the window to access contextual online assistance help. See page 3- - 209 to learn about accessing online help. Copying Waveform Data Use this procedure to copy waveforms, images, or measurements to the Windows clipboard.
  • Page 270 Data Input and Output Overview To copy data Control elements and resources Set image Select a color Palette for your copied images. copy options Select the image View: to copy an image of the entire screen, select Full-screen; to copy an image of the selected graticule, select Graticule(s) only.
  • Page 271 Data Input and Output Overview To copy data Control elements and resources 15. Select the Measurements tab. measurement 16. Select the data format for the measurement that you copy options want to copy. 17. Select Displayed Measurements to copy all measure- ments that are displayed on screen, or Measurements Snapshot to copy the current snapshot data.

  • Page 272: Printing Waveforms

    Data Input and Output Printing Waveforms You can print the contents of the display screen, including any waveforms, to the optional built-in thermal printer, a printer attached to one of the rear-panel ports, or a network printer if your oscilloscope is on a network. You can print the full screen, just the graticule area, or a long continuous waveform as a banner.

  • Page 273: Printing Banners

    Data Input and Output Figure 3- 60: Print preview dialog box Printing Banners Banners can only be printed on the integrated thermal printer. When you open the Print dialog box from the File menu Print command, the Name text box should contain Integrated Thermal Printer, the default if you have this printer installed.

  • Page 274: Using Print Screen

    Data Input and Output NOTE. If the banner you produce from the integrated thermal printer is unreadable because it is too light, open the printer cover and push the lever on the right side of the printer towards the back of the oscilloscope as far as it will Banner printing is not compatible with: H Fast Acquisition mode H Persistence display mode...

  • Page 275: Other Communication 3

    Data Input and Output Other Communication For information on connecting the oscilloscope to a network to enable printing, file sharing, Internet access, and other communication functions, see Connecting to a Network on page 1- -12. 3- 208 TDS5000 Series User Manual...

  • Page 276: Accessing Online Help

    Accessing Online Help The online help system, integrated as part of the oscilloscope user interface, provides quick access to support information for operating this instrument. This section describes the help system and how to access it. This oscilloscope provides the following help resources online: H Help Topics H TDS5000 Series Oscilloscope Online Programmer Guide (GPIB online help and a PDF file)
  • Page 277 Accessing Online Help Overview To use online help Control elements and resources For in-depth, When using the toolbar and you have a control window displayed, touch the Help button to open the help contextual system with an overview of the control window that is overviews currently displayed.
  • Page 278 Accessing Online Help Overview To use online help Control elements and resources Using WinHelp You can search for help using methods that most users of PCs are familiar with: From the menu bar, select Help, and then select Contents and Index. From the online help finder, choose from the three tabs.
  • Page 279 Accessing Online Help Overview To use online help Control elements and resources Enabling If you cannot find the information in the Contents or Index tabs of the online finder, you may want to enable full-text full text search: From the application menu bar, select search Help, and then select Contents and Index.

  • Page 280: Appendix A: Specifications

    The TDS5000 Series Digital Phosphor Oscilloscope family consists of the models shown in Table A- -1. Table A- 1: TDS5000 models Number of Maximum sample channels rate (real time) Model Bandwidth TDS5052 500 MHz 5 GS/s TDS5054 500 MHz 5 GS/s TDS5104 1 GHz 5 GS/s...

  • Page 281: Acquisition Features

    Appendix A: Specifications Acquisition Features Separate Digitizers. Ensure accurate timing measurements with separate digitizers for each channel. The digitizers can also be combined to yield a higher sample rate on a single channel. Fast Acquisition. Acquire up to 100,000 waveforms per second to see rapidly changing signals or intermittent signal irregularities.

  • Page 282: Display Features

    Appendix A: Specifications Display Features Color LCD Display. Identify and differentiate waveforms easily with color coding. Waveforms, readouts, and inputs are color matched to increase productivity and reduce operating errors. Digital Phosphor. A Digital Phosphor Oscilloscope can clearly display intensity modulation in your signals.
  • Page 283 Appendix A: Specifications Toolbar or Menu Bar. You can choose a toolbar operating mode that is optimized for use with the touch screen, or a PC-style menu-bar operating mode that is optimized for use with a mouse. Open Desktop. The oscilloscope is built on a Microsoft Windows software platform;...

  • Page 284: Specification Tables

    1 MΩ ± 1.0% in parallel with 18 pF ±2 pF Input impedance, DC coupled 50 Ω ±2.5%; VSWR ≤ 1.6:1 from DC to 500 MHz (TDS5052/TDS5054), VSWR ≤ 1.5:1 from DC to 1 GHz (TDS5104) CAT I, and ≤ 400 peak Maximum voltage at input BNC 150 V (1 MΩ)
  • Page 285 < 10 Hz for 1 MΩ, reduced by a factor of ten when using a 10X probe; <200 kHz for 50 Ω DC 50 Ω coupling, bandwidth limit set to Full Calculated rise time, typical TDS5052/TDS5054 SCALE range Rise time 1 mV/div to 1.99 mV/div 2.29 ns...
  • Page 286 1 mV/div to 99.5 mV/div ±10 V 100 mV/div to 1V/div ±100 V 1.01 V/div to 10 V/div 50 Ω coupling TDS5052/5054 SCALE range Offset range ±1 V 1 mV/div to 99.5 mV/div ±10 V 100 mV/div to 1 V/div 50 Ω...
  • Page 287 Appendix A: Specifications Table A- 2: Channel input and vertical specifications (Cont.) Characteristic Description ±1.5% + 1.0% × |net offset /offset range| DC gain accuracy, Sample or Average acquisition mode TDS 5104 with 2 mV/div - - 3.98 mV/div: ±3% + 1.0% × |net offset /offset range| Refer to Offset Range specifications DC voltage measurement accuracy Measurement type...
  • Page 288 Appendix A: Specifications Table A- 2: Channel input and vertical specifications (Cont.) Characteristic Description ±[1.5% + 1.0% × |net Average acquisition mode Absolute measurement of (≥16 averages) any waveform point, and offset /offset range|]× High, Low, Max, and Min |reading - - net offset | + 0.06 div ×...
  • Page 289 Effective bits, typical Sine wave input at the indicated frequency and pk-pk amplitude, at 50 mV/division and 25 °C Signal and input conditions Effective bits TDS5052, TDS5054 1 MHz, 9.2 div, 5 GS/s 6.8 bits sample rate, Sample ac- quisition mode 1 MHz, 9.2 div, 10 MS/s...

  • Page 290: Table A- 3: Horizontal And Acquisition System Specifications

    Appendix A: Specifications Table A- 3: Horizontal and acquisition system specifications Characteristic Description Acquisition modes Sample, Peak detect, Hi Res, Average, and Envelope Acquisition rate Up to 100,000 waveforms per second in Fast Acquisition mode Up to 130 waveforms per second with Fast Acquisition off Minimum record length 500 points Maximum record length...
  • Page 291 Appendix A: Specifications Table A- 3: Horizontal and acquisition system specifications (Cont.) Characteristic Description Delta time measurement accuracy For a single channel, with signal amplitude > 5 div, reference level set at 50%, interpolation set to sin(x)/x, volts/division set to ≥ 5 mV/div, with (displayed risetime)/(sample interval) ratio between 1.4 and 4, where sample interval = 1/(real-time sample rate) Conditions...

  • Page 292: Table A- 4: Trigger Specifications

    Auxiliary input resistance, typical ±20 V (DC or peak AC) Maximum auxiliary input voltage Edge Trigger Sensitivity Trigger Source Sensitivity TDS5052, TDS5054 Any channel, DC coupled 0.35 div from DC to 50 MHz, increasing to 1 div at 500 MHz Auxiliary input...
  • Page 293 Appendix A: Specifications Table A- 4: Trigger specifications (Cont.) Characteristic Description Trigger level or threshold accuracy, Edge trigger, DC coupling, for signals having rise and fall times ≤20 ns typical Trigger Source Accuracy ± [(2% ×| setting - - net Any channel offset | ) + (0.3 div ×...
  • Page 294 Appendix A: Specifications Table A- 4: Trigger specifications (Cont.) Characteristic Description For vertical scale settings ≥10 mV/div and ≤1 V/div Advanced trigger timing Minimum recognizable Minimum re-arm time to event width or time recognize next event Glitch type Minimum glitch width = 1 ns 2 ns + 5% of glitch width setting Runt or Window type Minimum runt width =...

  • Page 295: Table A- 5: Display Specifications

    Appendix A: Specifications Table A- 4: Trigger specifications (Cont.) Characteristic Description Runt or Window type, wider 1 ns to 1 s than Runt or Window type, time 1 ns to 1 s qualified Width type 1 ns to 1 s Timeout type 1 ns to 1 s Transition type...

  • Page 296: Table A- 6: Input/Output Port Specifications

    Appendix A: Specifications Table A- 6: Input/output port specifications Characteristic Description Probe Compensator Output Front-panel terminals Output voltage Frequency 1.0 V (from base to top) ± 1 kHz ± 5% 1.0% into a ≥ 10 kΩ load Analog Signal Output amplitude Rear-panel BNC connector, provides a buffered version of the signal that is attached to the channel 3 input 20 mV/div ±...

  • Page 297: Table A- 7: Data Storage Specifications

    Appendix A: Specifications Table A- 6: Input/output port specifications (Cont.) Characteristic Description Side-panel I/O ports Ports located on the rear panel Parallel port (IEEE 1284) DB-25 connector, supports the following modes: -standard (output only) bidirectional (PS-2 compatible) bidirectional enhanced parallel port (IEEE 1284 standard, mode 1 or mode 2, v 1.7) -bidirectional high-speed extended capabilities Audio ports...

  • Page 298: Table A- 8: Power Source Specifications

    Appendix A: Specifications Table A- 8: Power source specifications Characteristic Description 100 to 240 V ±10%, 47 Hz to 63 Hz Source voltage and frequency ≤220 W Power consumption Overvoltage Category Overvoltage Category II (as defined in IEC61010-1/A2) Table A- 9: Mechanical specifications Characteristic Description Weight...

  • Page 299: Table A- 10: Environmental Specifications

    Appendix A: Specifications Table A- 10: Environmental specifications Characteristic Description Temperature +5 °C to +45 °C Operating - - 20 °C to +60 °C Nonoperating Humidity Operating 20% to 80% relative humidity with a maximum wet bulb temperature of +29 °C at or below +45 °C, noncondens- Upper limit derated to 30% relative humidity at +45 °C Nonoperating With no diskette in floppy disk drive...

  • Page 300: Table A- 11: Certifications And Compliances

    Power Harmonic Current Emissions If interconnect cables are used, they must be low-EMI shielded cables such as the following Tektronix part numbers or their equivalents: 012-0991-01, 012-0991-02 or 012-0991-03 GPIB Cable; 012-1213-00 (or CA part number 0294-9) RS-232 Cable; 012-1214-00 Centronics Cable;...
  • Page 301 Appendix A: Specifications Table A- 11: Certifications and compliances (cont.) Category Standards or description EC Declaration of Conformity - - Compliance was demonstrated to the following specification as listed in the Official Journal of the Low Voltage European Union: Low Voltage Directive 73/23/EEC, amended by 93/68/EEC EN 61010-1/A2:1995 Safety requirements for electrical equipment for measurement control and laboratory use.

  • Page 302: Appendix B: Automatic Measurements Supported

    Appendix B: Automatic Measurements Supported This appendix provides a list of all supported measurements and their defini- tions. An illustration showing the levels used to take measurements is also included. Table B- 1: Supported measurements and their definitions Name Definition Amplitude Voltage measurement.
  • Page 303 Appendix B: Automatic Measurements Supported Table B- 1: Supported measurements and their definitions (Cont.) Name Definition Minimum Voltage measurement. The minimum amplitude. Typically the most negative peak voltage. Measured over the entire waveform or gated region. Negative Duty Cycle Timing measurement of the first cycle in the waveform or gated region. The ratio of the negative pulse width to the signal period expressed as a percentage.
  • Page 304 Appendix B: Automatic Measurements Supported Table B- 1: Supported measurements and their definitions (Cont.) Name Definition Waveform Count Displays the number of waveforms that have contributed to the histogram. Peak Hits Displays the number of points in the largest bin of the histogram. Pk-Pk Displays the peak-to-peak value of the histogram.
  • Page 305 Appendix B: Automatic Measurements Supported B- 4 TDS5000 Series User Manual...

  • Page 306: Appendix C: Cleaning

    Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. Before using any other type of cleaner, consult your Tektronix Service Center or representative. To prevent getting moisture inside the oscilloscope during external cleaning, use only enough liquid to dampen the cloth or applicator.
  • Page 307 Appendix C: Cleaning Clean the flat panel display surface by gently rubbing the display with a clean-room wipe (such as Wypall Medium Duty Wipes, #05701, available from Kimberly-Clark Corporation). CAUTION. To prevent getting moisture inside the oscilloscope during external cleaning, use only enough liquid to dampen the cloth or applicator. If the display is very dirty, moisten the wipe with distilled water or a 75% isopropyl alcohol solution and gently rub the display surface.

  • Page 308: Appendix D: Menu Bar Commands

    Appendix D: Menu Bar Commands This appendix describes the commands and functions available from the menu bar. For more information about these commands, see the online help. File Commands Table D- -1 lists the commands available from the File menu. Table D- 1: File menu commands Submenu Command...

  • Page 309: Edit Commands

    Appendix D: Menu Bar Commands Table D- 1: File menu commands (Cont.) Submenu Command Function Select for Export Full Screen (bitmap) Select an option to change the type of items exported without opening the Graticule (bitmap) Export Setup control window each time. Waveform (data) Measurements (data) Export...

  • Page 310: Vertical Commands

    Appendix D: Menu Bar Commands Vertical Commands Table D- -3 lists the commands available from the Vertical menu. Table D- 3: Vertical menu commands Submenu Command Function Vertical Setup Opens the Vertical Setup control window, used to set the vertical parameters for live (channel) waveforms.

  • Page 311: Horizontal And Acquisition Commands

    Appendix D: Menu Bar Commands Horizontal and Acquisition Commands Table D- -4 lists the commands available from the Horiz/Acq (Horizontal/Ac- quisition) menu. Table D- 4: Horiz/Acq menu commands Submenu Command Function Opens the Horizontal and Acquisition Setup window, used to set up the Horizontal/Acquisi- horizontal and acquisition parameters of waveforms.

  • Page 312: Trigger Commands

    Appendix D: Menu Bar Commands Trigger Commands Table D- -5 lists the commands available from the Trig (Trigger) menu. Table D- 5: Trig menu commands Submenu Command Function A Event (Main) Trig- Opens the Trigger Setup control window, used to set up the A Event triggers. ger Setup Quick Select Edge, Glitch, Width,...

  • Page 313: Display Commands

    Appendix D: Menu Bar Commands Display Commands Table D- -6 lists the commands available from the Display menu. Table D- 6: Display menu commands Submenu Command Function Display Setup Opens the Display Setup control window, from which you can set up the display appearance, screen text, screen objects, and screen colors.

  • Page 314: Cursors Commands

    Appendix D: Menu Bar Commands Cursors Commands Table D- -7 lists the commands available from the Cursors menu. Table D- 7: Cursors menu commands Submenu Command Function Cursor Controls Opens the Cursor Type Setup control window, used to select the type of cursors. Cursors On Toggles display of cursors on and off.

  • Page 315: Standard Math Commands

    Appendix D: Menu Bar Commands Table D- 8: Measure menu commands (Cont.) Submenu Command Function Display Statistics Value, Opens the selected measurement statistics of current measurements. Value, Mean, Value, Statistics Reference Levels Opens the Reference Levels control window, used to define reference levels for the measurements.

  • Page 316: Advanced Math Commands (Optional)

    Appendix D: Menu Bar Commands Advanced Math Commands (Optional) Table D- -9 lists the commands available from the Advanced Math menu. This version of the Math menu is present when you purchase Option 2A, Advanced Analysis. Table D- 10: Advanced Math menu commands Submenu Command Function...

  • Page 317: Utilities Commands

    Opens the Display Recorder, used to record actions while working with the display. Option Installation Use Option Installation to enable upgrades you have purchased for your oscilloscope from Tektronix. Help Commands Table D- -12 lists the commands available from the Help menu. Table D- 12: Help menu commands...
  • Page 318 Appendix D: Menu Bar Commands Table D- 12: Help menu commands (Cont.) Submenu Command Function Customer Feedback Describes how to supply customer feedback. About Tek Scope Shows the oscilloscope version number, serial number, instrument ID, copyright, installed options list, and option installation key. D- 11 TDS5000 Series User Manual...
  • Page 319 Appendix D: Menu Bar Commands D- 12 TDS5000 Series User Manual...

  • Page 320: Appendix E: Optimizing Measurement Accuracy

    Appendix E: Optimizing Measurement Accuracy This oscilloscope can compensate itself and any attached probes, optimizing the internal signal path used to acquire the waveforms you measure. Compensation optimizes the capability of the oscilloscope to take accurate measurements based on the ambient temperature. This appendix contains procedures that will help increase the accuracy of the measurements you take.
  • Page 321 Appendix E: Optimizing Measurement Accuracy Overview To compensate the oscilloscope (Cont.) Control elements and resources For further Access the online help. assistance See page 3- - 209 to learn about using online help. E- 2 TDS5000 Series User Manual...

  • Page 322: Connecting Probes For Calibration

    Appendix E: Optimizing Measurement Accuracy Connecting Probes for To compensate or calibrate probes you must connect them to the probe com- Calibration pensation terminals on the instrument, as shown below. Connect the probe tip and the ground lead to the two probe compensation connectors on the fixture as shown.
  • Page 323 Appendix E: Optimizing Measurement Accuracy Overview To calibrate probes Control elements and resources Optimize gain Connect the probe to the oscilloscope and the probe tip to the probe compensation terminals (see Connecting and offset Probes for Calibration on page E- - 3). accuracy If calibrating a passive probe, first perform the Compensating Low Frequency Probes procedure on...

  • Page 324: Compensating Low Frequency Probes

    Appendix E: Optimizing Measurement Accuracy Compensating Low Use this procedure to compensate passive probes to ensure maximum distortion- - Frequency Probes free inputs to the oscilloscope. Overview To compensate passive probes Control elements and resources Prerequisites The oscilloscope must be powered on. Allow a 20 minute warm up.

  • Page 325: Deskewing Channels

    Appendix E: Optimizing Measurement Accuracy Deskewing Channels You can adjust a relative time delay for each channel. This lets you align the signals to compensate for signals that may come in from cables of differing lengths. The oscilloscope applies deskew values after it completes each acquisition;...
  • Page 326 Appendix E: Optimizing Measurement Accuracy Overview To deskew channels Control elements and resources Compensate Connect up to four probes to the oscilloscope and the probe tips to the probe compensation terminals (see probe timing Connecting Probes for Calibration on page E- - 3). (deskew) Turn on each channel that you want to deskew (the front-panel CH button will be lighted).
  • Page 327 Appendix E: Optimizing Measurement Accuracy E- 8 TDS5000 Series User Manual...

  • Page 328: Glossary

    Glossary AC coupling A type of signal transmission that blocks the DC component of a signal but uses the dynamic (AC) component. Useful for observing an AC signal that is normally riding on a DC signal. Accuracy The closeness of the indicated value to the true value. Acquisition The process of sampling signals from input channels, digitizing the samples into data points, and assembling the data points into a waveform record.
  • Page 329 Glossary Automatic trigger mode A trigger mode that causes the oscilloscope to automatically acquire if triggerable events are not detected within a specified time period. Autoset A function of the oscilloscope that automatically produces a stable waveform of usable size. Autoset sets up front-panel controls based on the characteristics of the active waveform.

  • Page 330: Fast Acquisitions Mode

    Glossary Cursors Paired markers that you can use to make measurements between two waveform locations. The oscilloscope displays the values (expressed in volts or time) of the position of the active cursor and the distance between the two cursors. Cycle area A measurement of waveform area taken over one cycle.
  • Page 331 Glossary Equivalent time sampling (ET) A sampling mode in which the oscilloscope acquires signals over many repetitions of the event. These oscilloscopes use a type of equivalent time sampling called random equivalent time sampling, which uses an internal clock that runs asynchronously with respect to the input signal and the signal trigger.
  • Page 332 Glossary Hi Res acquisition mode An acquisition mode in which the oscilloscope averages all samples taken during an acquisition interval to create a record point. That average results in a higher-resolution, lower-bandwidth waveform. That mode only works with real-time, non-interpolated sampling. High The value used as 100% in automated measurements (whenever High Ref, Mid Ref, and Low Ref values are needed as in fall time and rise time...
  • Page 333 Glossary Linear interpolation calculates record points in a straight-line fit between the actual values acquired. Sin(x)/x computes record points in a curve fit between the actual values acquired. It assumes all the interpolated points fall in their appropriate point in time on that curve. Live waveforms Waveforms that can update as the acquisition system updates them.
  • Page 334 Glossary Minimum Amplitude (voltage) measurement of the minimum amplitude. Typically the most negative peak voltage. Multipurpose knobs Front-panel knobs you can use to change the value of the assigned parameter. NAND A logic (Boolean) function in which the output of the AND function is complemented (true becomes false, and false becomes true).
  • Page 335 Glossary Peak Detect acquisition mode A mode in which the oscilloscope saves the minimum and maximum samples over two adjacent acquisition intervals. For many glitch-free signals, that mode is indistinguishable from the sample mode. (Peak detect mode works with real-time, noninterpolation sampling only.) Peak-to-Peak Amplitude (voltage) measurement of the absolute difference between the maximum and minimum amplitude.
  • Page 336 Glossary Pretrigger The specified portion of the waveform record that contains data acquired before the trigger event. Probe An oscilloscope input device. Probe compensation Adjustment that improves low-frequency response of a probe. Pulse trigger A trigger mode in which triggering occurs if the oscilloscope finds a pulse of the specified polarity with a width between, or optionally outside, the user-specified lower and upper time limits.
  • Page 337 Glossary Sample interval The time interval between successive samples in a time base. For real-time digitizers, the sample interval is the reciprocal of the sample rate. For equivalent-time digitizers, the time interval between successive samples represents equivalent time, not real time. Sampling The process of capturing an analog input, such as a voltage, at a discrete point in time and holding it constant so that it can be quantized.
  • Page 338 Glossary Trigger An event that marks time zero in the waveform record. It results in acquisi- tion and display of the waveform. Trigger level The vertical level the trigger signal must cross to generate a trigger (on edge trigger mode). Vertical bar cursors The two vertical bars that you position to measure the time parameter of a waveform record.
  • Page 339 Glossary Glossary- 12 TDS5000 Series User Manual...
  • Page 340 Index Numbers A- - >B Seq tab, 3- - 96 A Then B, 3- - 95, 3- - 96 50- - 50 Split command, D- - 3, D- - 4 B trigger level, 3- - 96 80- - 20 Split command, D- - 3, D- - 4 Trig Event, 3- - 96 A->B Trigger Sequence, D- - 5 Absolute Reference, 3- - 117...
  • Page 341 Acquisition setup, D- - 4 Avg() function, 3- - 147 adding comments to setups, 3- - 183 Address, Tektronix, xv Adjusting Display Contrast, 1- - 17 adjusting the time base, 3- - 102 B Event (Delayed) Trigger Setup, D- - 5...
  • Page 342 Cursors On, D- - 7 rear panel, 2- - 7 H-bars, D- - 7 side panel, 2- - 7 Independent, D- - 7 Contacting Tektronix, xv Paired, D- - 7 Contents and Index, D- - 10 Split, D- - 7 Index- 3...
  • Page 343 Index Track, D- - 7 Printing from the Front Panel, 3- - 205 V-bars, D- - 7 Printing from the Menu Bar, 3- - 205 Cursor Mode, D- - 7 Printing Waveforms, 3- - 205 Cursor Position control window, D- - 7 Recall Setup From a File, 3- - 188 cursor readout, errors, 3- - 125 Recalling a Setup, 3- - 187...
  • Page 344 Index Delayed trigger, 3- - 53 Display Recorder, D- - 10 setting up, 3- - 95 Display Setup command, D- - 6 Delete All Refs, D- - 1 Display Setup control window, D- - 6 Delete Reference Waveform dialog box, 3- - 195 Display Setup control window deleting waveform files, 3- - 194 Appearance tab, 3- - 106, 3- - 107, 3- - 108...
  • Page 345 Index trigger level marker, 3- - 108 equivalent time sampling, 3- - 26, 3- - 33 Using Display Controls, 3- - 106 random, defined, Glossary- - 4 Using the Waveform Display, 3- - 100 random , 3- - 34 Using the Zoom Feature, 3- - 110 Equivalent-time sampling, 3- - 43 using Zoom with waveforms, 3- - 110 erasing all references and setups, 3- - 194...
  • Page 346 Index RUN/STOP, 3- - 43 frame, Horizontal menu, 3- - 45 Select the FastFrame and Time Stamps Selection Frame graticule command, D- - 6 Frame Count, Horizontal menu, 3- - 45 Controls, 3- - 47 Frame Length, Horizontal menu, 3- - 44 Select the Frame to View, 3- - 45 Frame, Horizontal menu, 3- - 46, 3- - 47 Select the Reference Frame, 3- - 46...
  • Page 347 Index Graticule Split, 3- - 111, 3- - 112 Holdoff command, D- - 5 Graticule Split button, 3- - 102 holdoff Graticule Style command, D- - 6 Default, 3- - 59 Grid graticule command, D- - 6 for video triggers, 3- - 90 Grid graticule style, 3- - 106 Time, 3- - 59 Ground coupling, Glossary- - 4...
  • Page 348 Index horizontal scale, 3- - 7, 3- - 19 Inverting channel waveforms, 3- - 9 definition, 3- - 18 IRE graticule command, D- - 6 horizontal scale and offset, setting up, 3- - 18 IRE graticule style, 3- - 106 Horizontal/Acquisition Setup, D- - 4 horizontal scale readout, defined, 3- - 100 JPEG file format, 3- - 196...
  • Page 349 Index Variable Persistence, D- - 6 command summary (Standard), D- - 8 Vectors, D- - 6 Display On/Off, D- - 8, D- - 9 Waveform Interpolation, D- - 6 Equation Editor, D- - 9 LCD Save Enabled, D- - 6 Label, D- - 8, D- - 9 level, trigger, 3- - 53 Magnitude Spectrum, D- - 8, D- - 9...
  • Page 350 Index selecting an expression, 3- - 145 Peak Hits, D- - 8 setting scale and position, 3- - 149 Peak to Peak, D- - 8 source dependencies, 3- - 139 Peak-to-Peak, D- - 7 sources, 3- - 139 Period, D- - 7 spectral analysis of an impulse, illustrated, 3- - 136 Phase, D- - 7 spectral math waveforms, 3- - 151...
  • Page 351 Index Positive overshoot, B- - 2 selecting measurement parameters, 3- - 116 Positive width, B- - 2 selecting the cursor sources, 3- - 128 Propagation delay, B- - 1 selecting a source waveform, 3- - 119 Rise Time, B- - 2, Glossary- - 9 setting cursor tracking, 3- - 129 RMS, B- - 2, Glossary- - 9 Set histogram display options, 3- - 133...
  • Page 352 3- - 159 Compensating Low Frequency Probes, E- - 5 Phase Spectrum, D- - 9 Compensating the Oscilloscope, E- - 1 Phone number, Tektronix, xv Connecting Probes for Calibration, E- - 3 Pixel, Glossary- - 8 Deskewing Channels, E- - 6...
  • Page 353 Index powering on, 1- - 8 quitting the application, 1- - 12 Predefined Expressions, 3- - 145 preferences, D- - 10 pretrigger, 3- - 50, 3- - 53 defined, Glossary- - 9 radians, using as phase units, 3- - 179 Preventing Aliasing, 3- - 23 readout, trigger, 3- - 57, 3- - 62 Print command, D- - 1...
  • Page 354 Index setting, 3- - 180 scale Resolution control window, D- - 4 horizontal, D- - 4 RESOLUTION knob, 3- - 20, 3- - 102, 3- - 104 vertical, D- - 3 Restore Help, D- - 10 SCALE knob, 3- - 102, 3- - 104 Restore Help button, 3- - 210 scallop loss, 3- - 161, 3- - 162 Rise Time, B- - 2, D- - 7, Glossary- - 9...
  • Page 355 Index Signal Processing Features, A- - 2 Spectral Grading command, D- - 6 Sin(x)/x command, D- - 6 spectral magnitude data, displaying, 3- - 151 Sin(x)/x interpolation, 3- - 34, 3- - 108, 3- - 109, Glossary- - 6 Spectral Math SINGLE button, 3- - 22, 3- - 26, 3- - 61 3 dB BW in bins, 3- - 162 Single sequence triggering, and acquisition mode, 3- - 61...
  • Page 356 Tek Exponential window, 3- - 158, 3- - 160, 3- - 162, 3- - 171 Time and frequency graphs for the Kaiser-Bessel Tek Secure, D- - 10, Glossary- - 10 window, illustrated, 3- - 168 Tektronix, contacting, xv Time and frequency graphs of the Blackman-Harris TekVISA, 2- - 2 window, illustrated, 3- - 169...
  • Page 357 Index time domain controls, 3- - 151 Trigger After Time, 3- - 95 Time trigger holdoff, 3- - 59 defined, 3- - 91 Timeout Setup, D- - 5 setting up, 3- - 95 Timeout trigger, Glossary- - 10 trigger condition, defined, 3- - 18 Timeout trigger, 3- - 63 Trigger, 3- - 50 Level, 3- - 77...
  • Page 358 Setting the glitch trigger level, 3- - 68 Upgrade, firmware, 1- - 3 Setting the pulse width trigger level, 3- - 73 URL, Tektronix, xv Setting the setup and hold times, 3- - 85 USB devices, 1- - 7, 2- - 7...
  • Page 359 Index Using the Waveform Display, 3- - 100 Vertical Offset control window, D- - 3 Utilities menu vertical position, 3- - 6, 3- - 15 AUX Out Configuration, D- - 10 and math waveforms, 3- - 142, 3- - 143, 3- - 149 command summary, D- - 10 vertical range, setting, 3- - 14 Deassign Multipurpose Knobs, D- - 10...
  • Page 360 3- - 31 illustrated, 3- - 32 spectral source, long versus short, 3- - 152 waveform record length, definition, 3- - 18 Web site address, Tektronix, xv YT format, 3- - 41 Width Setup, D- - 5 defined, Glossary- - 11...
  • Page 361 Index Index- 22 TDS5000 Series User Manual...

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