Tektronix TDS 200 Series Instructions Manual
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Tektronix TDS 200 Series Instructions Manual

Extension modules
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Instructions
TDS 200-Series
Extension Modules
070-9565-04
This document supports TDS 200-Series firmware
version 1.06 and greater, TDS2HM firmware all
versions, TDS2CM firmware version 1.04 and
greater, and TDS2MM firmware version 1.00 and
greater. Refer to Read Me First on page 1 for
more information.

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Summary of Contents for Tektronix TDS 200 Series

  • Page 1 Instructions TDS 200-Series Extension Modules 070-9565-04 This document supports TDS 200-Series firmware version 1.06 and greater, TDS2HM firmware all versions, TDS2CM firmware version 1.04 and greater, and TDS2MM firmware version 1.00 and greater. Refer to Read Me First on page 1 for more information.
  • Page 2 Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A.
  • Page 3 WARRANTY SUMMARY (TDS2HM, TDS2CM, and TDS2MM Extension Modules) Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment from an authorized Tektronix distributor. If a product proves defective within the respective period, Tektronix will provide repair or replacement as described in the complete warranty statement.

  • Page 5: Table Of Contents

    ........Contacting Tektronix ....... . .

  • Page 6: 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 the 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 7 General Safety Summary Product Damage Precautions Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. Safety Terms and Symbols Terms in This Manual. These terms may appear in this manual: CAUTION.

  • Page 8: Preface

    Preface These instructions describe how to install, set up, and test the TDS2CM, TDS2HM, and TDS2MM Extension modules. This manual presumes that you understand how to operate the TDS 200-Series oscilloscope. Conventions This manual uses the following conventions: H Labeled oscilloscope panel buttons are shown in the manual in all uppercase letters.

  • Page 9: Command Entry

    Preface Command Entry Follow these general rules when entering oscilloscope commands over the RS-232 or GPIB bus: H You can enter commands in upper or lower case. H You can abbreviate many oscilloscope commands. These abbreviations are shown in uppercase letters. For example, the command ACQuire:NUMAVg can be entered simply as ACQ:NUMAV or acq:numav.

  • Page 10: Contacting Tektronix

    1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tek.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Contact your local Tektronix distributor or sales Support office.

  • Page 11: Getting Started

    System Status Misc. TDS2MM and TDS 200-Series The TDS2MM Module only operates on TDS 200-Series oscillo- scopes with firmware version v1.06 and greater. Contact Tektronix for information on how to upgrade your TDS 200-Series oscilloscope firmware. Seiko Printer Support Seiko printer support (DPU411, DPU412) is only available with the...

  • Page 12: Features

    Getting Started Features The following table lists the module features. FFT, rise/fall time, pos/neg Module Centronics RS-232 GPIB pulse width TDS2HM TDS2CM TDS2MM TDS 200-Series Extension Module Instructions...

  • Page 13: Removing And Installing Modules

    Getting Started Removing and Installing Modules The following sections describe how to safely remove and install a module on your oscilloscope. Preventing Electrostatic Damage CAUTION. Electrostatic discharge (ESD) can damage components in the extension module and the oscilloscope. To prevent ESD, follow the steps below when installing, removing, or handling the extension modules: 1.
  • Page 14 Getting Started Removing an Extension Module CAUTION. Electrostatic discharge (ESD) can damage components in the extension module and the oscilloscope. To prevent ESD, follow the steps on page 3 when installing, removing, or handling the extension modules. After removing a module, install the dummy module cover to protect the contact pins.
  • Page 15 Getting Started Installing an Extension Module Make sure that you align the module connector to the oscilloscope connector pins before seating the module. TDS 200-Series Extension Module Instructions...

  • Page 16: Checking Module Installation

    If any pins are bent, carefully straighten them out. 6. Reinstall the extension module onto the oscilloscope. 7. Turn on the oscilloscope. If the oscilloscope still does not show the module installed, contact the nearest Tektronix service center. TDS 200-Series Extension Module Instructions...

  • Page 17: Tds2Hm Hard Copy Module

    TDS2HM Hard Copy Module The TDS2HM Module lets you print the oscilloscope screen data on a printer. This chapter describes how to set up and test the TDS2HM Hard Copy Extension Module. This information also applies to the hard copy portion of the TDS2CM Communications Module and the TDS2MM Measurement Module.

  • Page 18: Hard Copy Setup

    TDS2HM Hard Copy Module Hard Copy Setup To setup the TDS2HM Module, do the following: 1. Turn on the oscilloscope. " " 2. Push UTILITY Options Hard Copy Setup. 3. Push the menu button next to the menu item to change the settings to match those of your printer device.

  • Page 19: Testing The Hard Copy Port

    TDS2HM Hard Copy Module Testing the Hard Copy Port 1. If you have already connected the oscilloscope to a printer, go to step 4. 2. Turn off the oscilloscope and the printer. 3. Connect the oscilloscope to the printer using the appropriate cable.

  • Page 20: Tds2Cm Communications Module

    TDS2CM Communications Module This chapter describes how to set up and test the TDS2CM Communications Extension Module RS-232 and GPIB interfaces. The TDS2CM Module includes all features of the TDS2HM Module, described in TDS2HM Hard Copy Module starting on page 7. This information also applies to the communications portion of the TDS2MM Measurement Module.

  • Page 21: Rs-232 Setup

    TDS2CM Communications Module RS-232 Setup This section describes how to set up and test the extension module RS-232 interface. RS-232 is an 8-bit serial communications standard that lets the oscilloscope communicate with an external RS-232 device such as a computer, terminal, or printer. The standard defines two device types: Data Terminal Equipment (DTE) and Data Communications Equipment (DCE).
  • Page 22 You will need an RS-232 cable to connect the oscilloscope to an external device. Use the following table to choose the correct cable to connect the module to your RS-232 equipment. To connect the Tektronix oscilloscope to You need this type cable part number...
  • Page 23 TDS2CM Communications Module Connecting an External Device Follow these guidelines when connecting the module to an external RS-232 device: H Use the correct cable (refer to the table on page 12). H Use a cable that is no longer than 50 feet. H Turn off the oscilloscope and the external device before inserting the cable into the connectors.
  • Page 24 TDS2CM Communications Module RS-232 Settings To set the oscilloscope RS-232 interface: " " 1. Push UTILITY Options RS-232. 2. Push the menu button next to the menu item to change settings to match those of the external device. The following table lists the settings you can change.
  • Page 25 TDS2CM Communications Module Testing the RS-232 Interface To test the oscilloscope RS-232 interface: 1. Connect the oscilloscope to a personal computer (PC) using an appropriate RS-232 cable (refer to the table on page 12). 2. Turn on the PC. 3. On the PC, run a terminal-emulator program such as the Microsoft Windows Terminal.
  • Page 26 TDS2CM Communications Module TDS 200 Series Digitizing oscilloscope PROBE COMP CH 1 connector " " 6. On the oscilloscope, push UTILITY Options RS-232. 7. Check that the menu settings match those listed in the table on page 15. 8. From your PC terminal program, type ID?, then press the RETURN key to send the command.
  • Page 27 TDS2CM Communications Module 11. Send the command MEASUrement:IMMed:SOURCE CH1 to select measurements on channel 1. 12. Send the command MEASUrement:IMMed:TYPe PK2 to set up the voltage measurement. 13. Send the query MEASUrement:IMMed:VALue? to request the measurement result. The oscilloscope will respond with a result similar to 5.16E0, which is the voltage measurement of the PROBE COMP signal using the standard 10x probe.
  • Page 28 TDS2CM Communications Module RS-232 Troubleshooting If the oscilloscope and the external device (personal computer or printer) have trouble communicating, use the following steps to correct the problem: 1. Verify that the module is working. Refer to Checking Module Installation on page 6. 2.
  • Page 29 TDS2CM Communications Module RS-232 Conventions There are processing conventions that are specific to the RS-232 interface. The next sections discuss transferring binary data, processing break signals, reporting RS-232 I/O errors, and checking command status. Transferring Binary Data When using the RS-232 port to transfer binary data to the oscilloscope, note the following points: H Use hardware flagging (RTS/CTS) whenever possible.
  • Page 30 TDS2CM Communications Module Processing Break Signals When the oscilloscope senses a break signal on the RS-232 port, it returns DCL followed by the end of line terminator. Internally, the oscilloscope acts as if it received a GPIB <DCL> command, causing the oscilloscope to erase the contents of the input and output buffers and then wait for a new command.

  • Page 31: Gpib Setup

    H Connect the oscilloscope to the GPIB network. Use an appropri- ate GPIB cable. You can stack cable connectors. The following table lists cables that you can order to connect the oscilloscope to the GPIB network. Tektronix part number Cable type GPIB, 6.6 feet (2 meters) 012-0991-00 GPIB, 3.3 feet (1 meter)
  • Page 32 TDS2CM Communications Module GPIB Settings To set the oscilloscope GPIB interface: 1. If you have not done so yet, connect the oscilloscope to the GPIB network. " " 2. On the oscilloscope, push UTILITY Options GPIB Setup. 3. Push the menu button next to the menu item to change the settings to assign a unique address to the oscilloscope.
  • Page 33 TDS2CM Communications Module Testing the GPIB Interface To test the oscilloscope GPIB interface, you will need to refer to the documentation that came with your controller. The following procedure verifies communication with the oscillo- scope by acquiring a signal and returning a voltage measurement. This procedure assumes that the oscilloscope is connected to the GPIB network, the oscilloscope has been assigned a unique bus address, and that the controller software is running.
  • Page 34 TDS2CM Communications Module TDS 200 Series Digitizing oscilloscope PROBE COMP CH 1 connector 3. Send the command FACtory to reset the oscilloscope to factory settings. 4. Send the command AUTOSet EXECute to have the oscilloscope automatically acquire the input signal.
  • Page 35 TDS2CM Communications Module GPIB Network Conventions Follow these guidelines when you assemble your GPIB network: H Connect the GPIB devices in a star, linear, or combination star/linear network, as shown in the following figure. TDS 200-Series Extension Module Instructions...
  • Page 36 TDS2CM Communications Module H Do not use loop or parallel configurations (shown in the following figure). H The maximum number of devices in a network is 15. H The maximum cable length between any two devices is 6.6 feet (2 meters). H The maximum cable length in the entire network is 65 feet (20 meters).

  • Page 37: Tds2Mm Measurement Module

    TDS2MM Measurement Module This section describes the operation of the TDS2MM Measurement Extension Module. The TDS2MM Module includes all communica- tions capabilities of the TDS2CM Module, and adds these new measurement capabilities to the TDS 200-Series oscilloscopes: H Rise time, fall time, positive pulse width, and negative pulse width (discussed in Signal Measurements, on page 29) H Fast Fourier Transform (FFT) (discussed in Using the FFT, starting on page 30)

  • Page 38: Changed Math Operations

    TDS2MM Measurement Module Changed Math Operations The TDS2MM Module changes the following math operations: H The TDS2MM Module does not have the CH1–CH2 and CH2–CH1 math functions. To do the same functions, invert the channel you want to subtract (using the CH1 or CH2 menu) and then select the CH1+CH2 math function.

  • Page 39: Signal Measurements

    TDS2MM Measurement Module Signal Measurements Push the MEASURE button to display the automated measurement menu. The new measurements are in the Type menu. The TDS2MM Module automatically determines the 10%, 50%, and 90% waveform points. Type Definition Rise Time Measures the time between 10% and 90% of the first rising edge of the waveform.

  • Page 40: Using The Fft

    TDS2MM Measurement Module Using the FFT The FFT process mathematically converts a time-domain signal into its frequency components. FFT waveforms are useful in the following applications: H Testing impulse response of filters and systems H Measuring harmonic content and distortion in systems H Characterizing noise in DC power supplies H Analyzing vibration H Analyzing harmonics in 50 and 60 Hz power lines...
  • Page 41 TDS2MM Measurement Module Setting Up the Time-Domain Waveform It is important to correctly set up the time-domain (YT) waveform to produce a useable FFT waveform. Follow these steps to set up the YT waveform: 1. Press AUTOSET to display a YT waveform. 2.
  • Page 42 TDS2MM Measurement Module Nyquist Frequency The highest frequency that any real-time digitizing oscilloscope can measure without errors is one-half the sample rate. This frequency is called the Nyquist frequency. Frequency information above the Nyquist frequency is undersampled, causing a situation known as aliasing (refer to Aliasing on page 38).
  • Page 43 TDS2MM Measurement Module Displaying the FFT Waveform Push the MATH button to display the math menu. Use the menu buttons to select the FFT source channel, window algorithm, and display magnification. You can display only one FFT waveform at a time.
  • Page 44 TDS2MM Measurement Module The FFT Display Trig'd Pos:250.0 kHZ MATH CH1+CH2 Frequency component Window Hanning FFT Zoom CH1 10dB 50.0 kHz (1.00 MS/s) Hanning 1. Frequency at the center graticule line 2. Vertical scale in dB per division (0 dB = 1 V 3.
  • Page 45 TDS2MM Measurement Module FFT Windows Windows reduce spectral leakage in the FFT waveform. The FFT assumes that the YT waveform repeats forever. With an integral number of cycles (1, 2, 3, ...), the YT waveform starts and ends at the same amplitude and there are no discontinuities in the signal shape.
  • Page 46 TDS2MM Measurement Module Applying a window to the YT waveform changes the waveform so that the start and stop values are close to each other, reducing the discontinuities. Time-domain (YT) waveform Center 2048 data points Point-by-point multiply Window function (Hanning) YT waveform after windowing With windowing...
  • Page 47 TDS2MM Measurement Module Selecting an FFT Window The TDS2MM Module provides three FFT windows. Each window is a trade-off between frequency resolution and amplitude accuracy. What you want to measure and your source signal characteristics help determine which window to use. Use the following guidelines to select the best window.
  • Page 48 TDS2MM Measurement Module Aliasing Problems occur when the oscilloscope acquires a time-domain waveform containing frequency components that are greater than the Nyquist frequency (refer to Nyquist Frequency on page 32). The frequency components that are above the Nyquist frequency are undersampled, appearing as lower frequency components that “fold back”...
  • Page 49 TDS2MM Measurement Module Eliminating Aliases Use the following methods to eliminate aliases: H Increase the sample rate by adjusting the time/division to a faster setting. Since you increase the Nyquist frequency as you increase the sample rate, the aliased frequency components should appear at their proper frequency.
  • Page 50 TDS2MM Measurement Module Horizontal Zoom and Position The FFT Zoom menu lets you horizontally magnify the FFT waveform without changing the sample rate. Zoom factors are X1 (default), X2, X5, and X10. At zoom factor X1, and with the waveform centered in the graticule, the left graticule line is at 0 Hz and the right graticule line is at the Nyquist frequency.
  • Page 51 TDS2MM Measurement Module Measuring FFT Waveforms Using Cursors You can take two measurements on FFT waveforms: magnitude (in dB) and frequency (in Hz). Magnitude is referenced to 0 dB, where 0 dB equals 1 V RMS. You can use the cursors to take measurements at any zoom factor.

  • Page 52: Appendix A: Certifications And Compliances

    Appendix A: Certifications and Compliances The TDS 200-Series Extension Modules meet the following certifications and compliances. Certifications and Compliances EC Declaration of Meets intent of Directive 89/336/EEC for Electromagnetic Conformity Compatibility for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EN 50081-1 Emissions: EN 55011...

  • Page 53: Appendix B: Comparing Gpib And Rs-232

    Appendix B: Comparing GPIB and RS-232 The following table provides an in-depth comparison of the GPIB and RS-232 interfaces. You should select the interface that best meets your requirements. Operating Attribute GPIB RS-232 Cable IEEE-488 Std. 9-wire Data flow control Hardware, 3-wire hand- Flagging: shake...
  • Page 54 Appendix B: Comparing GPIB and RS-232 Operating Attribute GPIB RS-232 Message termination Hardware EOL, Software CR, LF, CRLF, (Receive) software LF, or both LFCR Message termination Hardware EOL, software Software CR, LF, CRLF, (Transmit) LFCR Timing Asynchronous Asynchronous Transmission path length 2 meters between 15 meters (max)

  • Page 55: Appendix C: Manuals

    Appendix C: Manuals TDS 210 & TDS 220 Service Manual. The service manual (English 070-9693-XX) provides module level repair information. TDS 210 & TDS 220 User Manuals. The user manual is available in these languages: English 070-8483-XX French 070-8520-XX* German 070-8484-XX* Italian 070-8980-XX*...
  • Page 56 Appendix C: Manuals TDS 200-Series Two Channel Digital Oscilloscope Programmer Manual. The programmer manual (English 070-9576-XX) provides command syntax for remote control of the TDS 200-Series oscilloscope. TDS 200-Series Extension Module Instructions...

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