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Tektronix TDS 340A User Manual

Tektronix TDS 340A User Manual

Digital real-time oscilloscopes
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TDS 340A, TDS 360 & TDS 380
Digital Real-Time Oscilloscopes
070-9459-04

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Summary of Contents for Tektronix TDS 340A

  • Page 1 User Manual TDS 340A, TDS 360 & TDS 380 Digital Real-Time Oscilloscopes 070-9459-04...
  • Page 2 Copyright Tektronix, Inc. 1995. 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 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.

  • Page 5: Table Of Contents

    Table of Contents General Safety Summary ........Preface .
  • Page 6 Table of Contents Saving and Recalling Waveforms ......3–45 Using Reference Waveforms .
  • Page 7 Table of Contents List of Figures Figure 1–1: The ON/STBY button ......1–3 Figure 1–2: Line fuse removal .
  • Page 8 Table of Contents Figure 3–23: Cursor measurement of an FFT waveform ..3–35 Figure 3–24: FFT time domain record vs. FFT frequency domain record ......... . 3–36 Figure 3–25: How aliased frequencies appear in an FFT .
  • Page 9 Table of Contents List of Tables Table 2–1: Autoset defaults ........2–15 Table 3–1: Measurement definitions .
  • Page 10 Table of Contents TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 11: 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. Injury Precautions Use Proper Power Cord To avoid fire hazard, use only the power cord specified for this product.

  • Page 12: Safety Terms And Symbols

    General Safety Summary Product Damage Precautions Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified. Provide Proper Ventilation To prevent product overheating, provide proper ventilation. Do Not Operate With If you suspect there is damage to this product, have it inspected by qualified Suspected Failures service personnel.

  • Page 13: Certifications And Compliances

    General Safety Summary Symbols on the Product The following symbols may appear on the product: DANGER Protective Ground ATTENTION Double High Voltage (Earth) Terminal Refer to Manual Insulated Certifications and Compliances CSA Certified Power CSA Certification includes the products and power cords appropriate for use in Cords the North America power network.
  • Page 14 General Safety Summary TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 15: Appendix D: General Care And Cleaning

    Preface This manual provides user information for the TDS 300 Two-Channel Digital Real-Time Oscilloscopes. The manual contains the following chapters and appendices: Getting Started contains a brief product description; information needed to power on the oscilloscope, and a brief procedure to verify that it functions. Operating Basics contains user interface, probe, and autoset information.
  • Page 16 Preface TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 17 Getting Started...

  • Page 19: Getting Started

    Getting Started Tektronix TDS 340A, TDS 360, and TDS 380 oscilloscopes are digital signal processors and are superb tools for displaying and measuring waveforms. Their performance addresses the needs of both benchtop lab and portable applications with the following features: Two input channels, each with a record length of 1,000 samples and 8-bit vertical resolution.

  • Page 20: Start Up

    Getting Started Start Up To properly install and power on the oscilloscope, perform this procedure. 1. Check that you have the proper electrical connections. The rear label lists power requirements for all possible voltage inputs. 2. Check the fuse to be sure it is the proper type and rating (Figure 1–2). TDS 300 Series oscilloscopes are shipped with a UL-approved fuse installed.

  • Page 21: Line Fuse Replacement

    Getting Started ON/STBY button Figure 1–1: The ON/STBY button Line Fuse Replacement WARNING. To avoid injury or death, unplug the line cord from the line voltage power source before continuing. 1. Have handy a flat-bladed screwdriver. 2. Set the oscilloscope so its bottom is down on the work surface and its rear is facing you.

  • Page 22: Figure 1-2: Line Fuse Removal

    Getting Started Power connector Fuse Fuse drawer Figure 1–2: Line fuse removal 5. Reinstallation: Do in reverse steps 4 through 2 to reinstall the line fuse and then the line cord. 1–4 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 23: Self Test

    When finished, status messages appear on the screen. 4. Check that the screen reports no failures. If it reports a failure, the oscillo- scope has failed the self test. Contact your Tektronix representative for assistance. 5. Press CLEAR MENU.

  • Page 24: Figure 1-3: Verifying Adjustments And Signal Path Compensation

    9. Check that the word Pass appears under Signal Path in the main menu. (See Figure 1–3.) If Pass does not appear, the oscilloscope has failed the performance verification; return it to Tektronix for servicing. 1–6 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 25: Figure 1-4: Hookup For Functional Test

    Getting Started Functional Test The purpose of this procedure is to confirm that the oscilloscope functions properly. NOTE. This procedure verifies functions; that is, it verifies that oscilloscope features operate. It does not verify that they operate within limits. Therefore, when the instructions that follow call for you to verify that a signal appears on-screen “that is about five divisions in amplitude”...
  • Page 26 Getting Started 2. Press the front-panel button SAVE/RECALL, the main-menu button Recall Factory Setup, and then the side-menu button OK Confirm Factory Init. 3. Press AUTOSET. 4. Set the VOLTS/DIV to 1 V. Use the vertical POSITION knob to center the waveform vertically on screen.
  • Page 27 Getting Started 18. Press WAVEFORM OFF to remove Channel 1 from the display. 19. Press CH 2 and move the probe to the CH 2 input. 20. Repeat steps 3 through 17 for Channel 2. 21. Disconnect the probe from the channel input and the PROBE COMP terminal.
  • Page 28 Getting Started 1–10 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 29 Operating Basics...

  • Page 31: Display And Power Controls

    Operating Basics This chapter begins with eight illustrations that identify and describe each control and connector on the TDS 300 Series oscilloscope. Next, Operating Basics covers these additional topics: Using the menu system Using probes Using autoset Display and Power Controls The Side Menu buttons provide access to side menu selections.

  • Page 32: Vertical Controls

    Operating Basics Vertical Controls The Vertical POSITION knob controls the vertical position of the selected waveform. The Waveform Select buttons display and select waveforms (CH1, CH2, MATH, REF1, and REF2). A light next to a button illuminates when that waveform is The VERTICAL MENU button calls up selected.

  • Page 33: Horizontal Controls

    Operating Basics Horizontal Controls The Horizontal POSITION knob controls the horizontal position of all waveforms. The HORIZONTAL MENU button calls up the horizontal operations menu. For more information about horizontal operations, see page 3–6. The SCALE knob controls the horizontal scale of the active waveforms.

  • Page 34: Trigger Controls

    Operating Basics Trigger Controls The Trigger LEVEL knob controls the trigger. The TRIGGER MENU button calls up the trigger menu. See page 3–11 for more information about triggering. The SET LEVEL TO 50% button sets the trigger level at the midpoint between the peaks of the trigger signal.

  • Page 35: Miscellaneous Controls

    Operating Basics Miscellaneous Controls The MEASURE button calls up the automated measurements menu. See page 3–17 for more information about automated measurements. The floppy disk drive provides The RUN/STOP button starts The UTILITY button calls up the utility mass storage for waveforms, and stops acquisition.

  • Page 36: Display Map

    Operating Basics Display Map Trigger position (T). The waveform Indicates position record icon. of vertical bar cursors in the waveform record. Shows what part of the waveform record is displayed. The value entered with the general purpose knob. When the general purpose The Status Readouts show knob is first assigned, the trigger status and acquisition...

  • Page 37: Inputs

    Operating Basics Inputs The channel BNC inputs (CH1 and The EXT TRIG input accepts external CH2) accept electrical signals for trigger signals. See page 3–12 for display. more information about external triggering. 2–7 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 38: Rear-Panel Connectors

    Operating Basics Rear-Panel Connectors The Option 14 Panel (Option 14 instruments only) The power connector accepts line voltage allows access to three communications interfaces: to power the instrument. See page 0–1 for a Centronics parallel port, an RS-232 interface, a list of power cord and connector options. and a GPIB interface.

  • Page 39: Using The Menu System

    Operating Basics Using the Menu System TDS 300 Series oscilloscopes use an intuitive user interface. This interface reduces front-panel clutter while allowing easy access to specialized functions through the menu structure. The procedure on page 2–10 illustrates how to navigate in the menu structure. If you are unfamiliar with this menu system, you may want to run through the procedure several times to learn how you can access functions and subfunctions.

  • Page 40: Figure 2-1: Using Menus

    Operating Basics Press any of the front-panel menu buttons. Select an item from the main (bottom) menu or use leftmost button to pop up selections. Select an item from the side menu, if displayed. Adjust menu item values with general purpose knob. Figure 2–1: Using menus 1.

  • Page 41: Figure 2-2: A Pop-Up Menu

    Operating Basics 2. Push a bottom menu button to select a function. One of three things result: If the function has no subfunctions, it becomes active. If it is a variable function, you can now use the General Purpose Knob to adjust it (step 4).

  • Page 42: Using The Probes

    Operating Basics Using the Probes The TDS 340A, TDS 360, and TDS 380 come with two standard-accessory probes. Use these probes to conduct signals to the oscilloscope. For detailed probe specifications and instructions, see the instruction manual packaged with the probe. Connecting a Probe To connect a probe to the oscilloscope, attach the BNC end of the probe to either the CH 1 or CH 2 input.

  • Page 43: Figure 2-4: Probe Compensation Setup

    Operating Basics Figure 2–4: Probe compensation setup 2. Press AUTOSET. The oscilloscope displays the compensation waveform. It should resemble the waveform shown in Figure 2–5. Figure 2–5: Compensation waveform 2–13 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 44: Figure 2-6: How Probe Compensation Affects Signals

    Operating Basics 3. Check that the waveform indicates correct compensation (see Figure 2–6). If the waveform indicates over or undercompensation, use the alignment tool provided with the probe to adjust the compensation as shown in Figure 2–7. Probe compensated correctly Probe overcompensated Probe undercompensated Figure 2–6: How probe compensation affects signals...

  • Page 45: Using Autoset

    Operating Basics Using Autoset The TDS 300 Series autoset feature produces a stable, triggered display of almost any input signal. To use autoset, connect a signal to either the CH 1 or CH 2 input connector, and press the AUTOSET button (shown in Figure 2–8). Autoset Figure 2–8: The AUTOSET button Table 2–1 specifies the changes autoset makes in your oscilloscope setup.
  • Page 46 Operating Basics Table 2–1: Autoset defaults (Cont.) Control Changed by autoset to Trigger Holdoff 500 ns Vertical Scale As determined by the signal level Vertical Coupling DC unless AC was previously set; AC remains unchanged Vertical Bandwidth Full Vertical Offset 0 volts 2–16 TDS 340A, TDS 360 &...
  • Page 47 Reference...

  • Page 49: Introduction

    Introduction This chapter describes common tasks where you can use the TDS 300 oscillo- scope. The tasks listed below are in a functional order, starting with the most basic and then moving to the more specialized: Manipulating Waveforms Triggering Taking Measurements Controlling Acquisition Controlling the Display Using the FFT...
  • Page 50 Introduction 3–2 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 51: Manipulating Waveforms

    Manipulating Waveforms There are two basic ways to manipulate waveforms acquired by TDS 300 Series oscilloscopes. You can change their display parameters with the vertical and horizontal systems You can add, subtract, and multiply them with the waveform math feature Vertical Operations To access the vertical-system features, press the VERTICAL MENU button, shown in Figure 3–1.

  • Page 52: Figure 3-2: The Vertical Menu

    Manipulating Waveforms Figure 3–2 shows the vertical menu. Figure 3–2: The vertical menu Use the vertical menu to perform these tasks. Select Input Coupling Press the main-menu button Coupling. Use the side menu to select DC, AC, or ground (GND) coupling. Invert a Waveform Press the main-menu button Invert.

  • Page 53: Figure 3-3: Inverting A Waveform

    Manipulating Waveforms Normal waveform Inverted waveform Figure 3–3: Inverting a waveform Select Bandwidth Press the main-menu button Bandwidth. Use the side menu to switch between 20 MHz and full bandwidth. Make Fine V/div Press the main-menu button Fine Scale to activate the General Purpose Knob. Adjustments Then use the knob to make precise adjustments to the vertical scale setting.

  • Page 54: Horizontal Operations

    Manipulating Waveforms Horizontal Operations To access horizontal system features, press the HORIZONTAL MENU button, shown in Figure 3–4. Figure 3–5 shows the horizontal menu. Horizontal menu Figure 3–4: The HORIZONTAL MENU button Figure 3–5: The horizontal menu 3–6 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 55 Manipulating Waveforms Use the horizontal menu to perform these tasks. Select the Time Base Press the main-menu button Time Base. Use the side menu to select from these options: Press Main Only to show only the main time base. Press Intensified to show both the main and delayed time bases. The oscilloscope intensifies a portion of the waveform;...

  • Page 56: Displaying Math Waveforms

    Manipulating Waveforms Displaying Math Waveforms A TDS 300 Series oscilloscope performs math operations on one or both channel waveforms. Using one channel waveform, the oscilloscope can calculate a Fast Fourier Transform (FFT) to display the frequency content of a signal. Using both channel waveforms, the oscilloscope can add or multiply them or subtract one from the other and display the result as a math waveform.

  • Page 57: Figure 3-7: A Math Waveform

    Manipulating Waveforms Figure 3–7: A math waveform 3–9 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 58 Manipulating Waveforms 3–10 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 59: Triggering

    Triggering TDS 300 Series oscilloscopes have two triggers: a standard edge trigger and a video trigger. To access trigger settings and features, press the TRIGGER MENU button, shown in Figure 3–8. Trigger menu Figure 3–8: The TRIGGER MENU button This button calls up one of two menus: the edge trigger menu or the video trigger menu.

  • Page 60: Figure 3-9: The Edge Trigger Menu

    Triggering Figure 3–9: The edge trigger menu Use the edge trigger menu to perform these tasks. Select the Trigger Source Press the main-menu button Source. Use the side menu to select from these options: Press Ch1 or Ch2 to set the trigger source to one of the input channels. Press Ext or Ext/10 to set the trigger source to the EXT TRIG input on the front panel.
  • Page 61 Triggering allows only the low-frequency components to pass on to the triggering system. High-frequency reject mode attenuates signals above 30 kHz. Press LF Reject to select low-frequency reject mode. Low-frequency rejection is the opposite of high-frequency rejection. Low-frequency reject mode attenuates signals below 80 kHz. Press Noise Reject to select noise reject mode.

  • Page 62: Video Triggering

    Triggering Video Triggering The video trigger triggers on field 1, field 2, any field, or lines of an NTSC or PAL standard video signal. It can also trigger on nonstandard video signals with similar sync signals. You can access video trigger settings through the video trigger menu, shown in Figure 3–10.

  • Page 63: Figure 3-11: The Video Scan-Rate Menu

    Triggering Press Any Field to trigger on any field of the video signal. Press Lines to trigger on all lines of the video signal. The video trigger can only trigger on negative-going sync. If you need to trigger on the positive-going sync of a signal, simply invert the signal from the vertical menu (see page 3–4).
  • Page 64 Triggering 3–16 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 65: Taking Measurements

    Taking Measurements TDS 300 Series oscilloscopes have two features that make it easy for you to measure data from a displayed waveform: automated measurements and cursors. Automated Measurements The oscilloscope can perform 21 different automated measurements on a waveform (four measurements at any one time). To access these measurements, press the MEASURE button, shown in Figure 3–12.

  • Page 66: Figure 3-13: The Measure Menu And Active Measurements

    Taking Measurements Figure 3–13: The measure menu and active measurements Use the measure menu to perform the following tasks. Activate a Measurement Use this procedure to activate a measurement for the selected waveform: 1. Press the main-menu button Select Measrmnt for..2.

  • Page 67: Table 3-1: Measurement Definitions

    Taking Measurements Table 3–1: Measurement definitions Name Definition Period Timing measurement. Time it takes for the first complete signal cycle to happen in the waveform or gated region. The reciprocal of frequency. Measured in seconds. Frequency Timing measurement for the first cycle in the waveform or gated region. The reciprocal of the period.
  • Page 68 Taking Measurements Table 3–1: Measurement definitions (Cont.) Name Definition Amplitude Voltage measurement. The high value less the low value measured over the entire waveform or gated region. Amplitude = High – Low Mean Voltage measurement. The arithmetic mean over the entire waveform or gated region. Cycle Mean Voltage measurement.

  • Page 69: Taking Measurements With Cursors

    Taking Measurements NOTE. Gate Off deactivates the gating function, but it does not deactivate the vertical cursors. Deactivate the cursors from the cursor menu as described in the next section. Switch High-Low Setup Press the main-menu button High–Low Setup to change the way the measure- ment system determines the high and low levels of waveforms.

  • Page 70: Figure 3-14: The Cursor Button

    Taking Measurements Cursor Figure 3–14: The CURSOR button Figure 3–15: The cursor menu 2. If you want to take a time measurement in Hertz instead of seconds, press the main-menu button Time Units and use the side menu to switch between the two.

  • Page 71: Figure 3-16: Paired Cursor Measurements Of A Sine Wave

    Taking Measurements 5. Use the General Purpose Knob to move one cursor to a desired measurement point. For example, if you wanted to measure both the peak-to-peak voltage and period of a sine wave, you would start by moving one paired cursor to a “valley”...
  • Page 72 Taking Measurements 3–24 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 73: Controlling Acquisition

    Controlling Acquisition To access the acquisition controls, press the front panel button ACQUIRE, shown in Figure 3–17. Acquire Figure 3–17: The ACQUIRE button The ACQUIRE button activates the acquire menu, shown in Figure 3–18. Figure 3–18: The acquire menu 3–25 TDS 340A, TDS 360 &...
  • Page 74 Controlling Acquisition Use the acquire menu to perform these tasks. Select Acquisition Mode Press the main-menu button Mode. Use the side menu to select from these modes. Press Sample to select sample mode. Press Peak Detect to select peak detect mode. Peak detect mode only operates at horizontal SCALE settings of 25 s or slower.

  • Page 75: Controlling The Display

    Controlling the Display To access the display controls, press the front panel button DISPLAY, shown in Figure 3–19. Display Figure 3–19: The DISPLAY button The DISPLAY button activates the display menu, shown in Figure 3–20. Figure 3–20: The display menu 3–27 TDS 340A, TDS 360 &...
  • Page 76 Controlling the Display Use the display menu to perform these tasks. Select Display Style Press the main-menu button Style. Use the side menu to select from these display styles: Press Vectors to select vector display style. The oscilloscope draws a vector between each pair of waveform points.
  • Page 77 Controlling the Display Add or Remove the You can display the current date and time on screen so that it appears in the Date/Time Stamp display, on hard copies you print, and with any files you store on the floppy disk. To enable the date and time stamp in the display, do the following steps: 1.
  • Page 78 Controlling the Display 3–30 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 79: Using The Fft

    Using the FFT Using the Fast Fourier Transform (FFT), you can transform a waveform from a display of its amplitude against time to one that plots the amplitudes of the various discrete frequencies the waveform contains. Use FFT math waveforms in the following applications: Testing impulse response of filters and systems Measuring harmonic content and distortion in systems...

  • Page 80: Operation

    Using the FFT always expressed in frequency/division with the beginning (left-most point) of the waveform representing zero frequency (DC). Normal waveform of an impulse response FFT waveform of the magnitude response Figure 3–21: System response to an impulse Operation To obtain an FFT of your waveform, do these basic tasks: Acquire and display it normally (that is, in the time domain) in your choice of input channels.

  • Page 81: Figure 3-22: Define Fft Waveform Menu

    Using the FFT 3. Press the front-panel MATH button to display a math waveform. 4. Press the FFT side-menu button to select the FFT waveform. To select a different source channel, press the FFT side-menu button repeatedly. See Figure 3–22. Figure 3–22: Define FFT waveform menu NOTE.
  • Page 82 Using the FFT Cursor Measurements of Once you have displayed an FFT math waveform, use cursors to measure its an FFT frequency amplitudes. 1. Be sure MATH is selected in the channel selection buttons. 2. Press the front-panel button CURSOR, the main-menu button Function, and then the side-menu button H Bars.

  • Page 83: Figure 3–23: Cursor Measurement Of An Fft Waveform

    Using the FFT Figure 3–23: Cursor measurement of an FFT waveform 10. Press the main-menu button Function and then the side-menu button Paired. 11. Use the technique just outlined to place the vertical bar of each paired cursor to the points along the horizontal axis you are interested in. 12.

  • Page 84: Considerations For Using Ffts

    Using the FFT Considerations for Using FFTs There are several characteristics of FFTs that affect how they are displayed and should be interpreted. Read the following topics to learn how to optimize the oscilloscope setup for good display of your FFT waveforms. FFTs Transform Time A 1000-point time-domain record is input for the FFT.
  • Page 85 Using the FFT example, a sample rate of 20 Megasamples/second would yield an FFT with a range of 0 to 10 MHz. The sample rates available for acquiring data records vary over a range the limits of which depend on your oscilloscope model. The oscilloscope displays the sample rate in the acquisition readout at the top of the oscilloscope screen.

  • Page 86: Figure 3–25: How Aliased Frequencies Appear In An Fft

    Using the FFT Filter the input to bandwidth limit it to frequencies below that of the Nyquist frequency. Recognize and ignore the aliased frequencies. If you think you have aliased frequencies in your FFT, select the source channel and adjust the horizontal scale to increase the sample rate. Since you increase the Nyquist frequency as you increase the sample rate, the alias signals should “unfold”...

  • Page 87: Figure 3–26: Windowing The Fft Time Domain Record

    Using the FFT Time domain record Hanning window Time domain record after windowing Frequency domain record Figure 3–26: Windowing the FFT time domain record 3–39 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 88 Using the FFT 3–40 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 89: Making Hard Copies (Option 14 Equipped Instruments Only)

    Making Hard Copies (Option 14 Equipped Instruments Only) By using the Option 14 Communications Interface, you can make hard copies of waveforms with the oscilloscope. To make a hard copy, connect your hard copy device to the appropriate interface on the rear panel and press the HARDCOPY button, shown in Figure 3–27.

  • Page 90: Configuring Hard Copy Output

    Making Hard Copies Configuring Hard Copy Output Before you can successfully make a hard copy, you need to configure the hard copy output to match your hard copy device. Use this procedure to configure the hard copy output: 1. Press the UTILITY button, shown in Figure 3–28. Utility Figure 3–28: The UTILITY button 2.

  • Page 91: Saving A Hard Copy To Disk

    Making Hard Copies 3. Press the main-menu button Hcp Port. Use the side menu to select Centron- ics, GPIB, or RS-232C. 4. Press the main-menu button Hcp Layout. Use the side menu to select Landscape or Portrait. 5. Press the main-menu button Hcp Format. Use the side menu to select your printer format (press the lowermost side-menu button, labeled –more–...
  • Page 92 Making Hard Copies 4. Turn the general purpose knob to place the scroll bar over the file in which to store the hard copy. NOTE. Upon power on, the oscilloscope creates the “wild card” file TEK?????.FMT for storing hard copies, where “.FMT” is replaced by the hard copy format you select.

  • Page 93: Saving And Recalling Waveforms

    Saving and Recalling Waveforms You can save waveforms into and recall them from reference waveforms that reside in nonvolatile memory. You can also save and recall waveforms to and from files on a floppy disk. Using Reference Waveforms TDS 300 Series oscilloscopes have two reference waveforms. You can use the reference waveforms to store “live”...

  • Page 94: Figure 3–31: A Reference Waveform Menu

    Saving and Recalling Waveforms If the selected reference waveform does not contain null data, it appears on the screen. A side menu also appears; select one of these options from the side menu (see Figure 3–31). Press Save CH1 to Ref(x) to save the channel 1 waveform to the selected reference waveform.

  • Page 95: Using The Disk

    Saving and Recalling Waveforms The reference waveforms maintain their contents indefinitely, regardless of the power state or setup of the instrument. To remove a selected reference waveform from the display, press WAVEFORM OFF. Recalling a Reference To recall a reference waveform simply press its front panel button (REF 1 or Waveform REF 2).

  • Page 96: Figure 3–32: Save Format Menu

    Saving and Recalling Waveforms Figure 3–32: Save Format menu Saving a Waveform to the To store a waveform to disk, insert a formatted 720 Kbyte or 1.44 Mbyte floppy Disk disk into the slot at the top of the oscilloscope. Press the main-menu button Save Wfm and then the side-menu button To File.

  • Page 97: Viewing A Waveform On A Spreadsheet

    Saving and Recalling Waveforms Viewing a Waveform on a Spreadsheet To save a waveform and view the waveform data using a spreadsheet (this example uses EXCEL): 1. With a disk in the disk drive, press the front-panel button SAVE/RECALL, the main-menu button Save Format, and then the side-menu button Spreadsheet.
  • Page 98 Saving and Recalling Waveforms 3–50 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 99: Saving And Recalling Front-Panel Setups

    Saving and Recalling Front-Panel Setups TDS 300 Series oscilloscopes can store up to ten front-panel setups in internal memory for an indefinite period. You can also save and recall setups to and from a floppy disk. To access front-panel save and recall features, press the SAVE/RE- CALL button, shown in Figure 3–33.

  • Page 100: Using Internal Memory

    Saving and Recalling Front-Panel Setups Using Internal Memory Internal, nonvolatile memory contains locations to store up to ten oscilloscope setups. NOTE. The Tek Secure feature (page 3–59) will erase all saved setups. Saving the Current Setup To save the current setup, press the front-panel button SAVE/RECALL and then the main-menu button Save Current Setup.

  • Page 101: Using The Disk

    Saving and Recalling Front-Panel Setups Using the Disk The disk drive can provide mass storage for an unlimited number of oscilloscope setups. NOTE. Setups are not transferable between different oscilloscope models or software versions. Saving the Current Setup To save a setup on a formatted disk, insert a formatted 720 Kbyte or 1.44 Mbyte floppy disk into the slot at the top of the oscilloscope.
  • Page 102 Saving and Recalling Front-Panel Setups 3–54 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 103: Using The File System

    Using the File System The TDS 300 oscilloscopes provide file utilities and a floppy disk drive for saving hard copies, setups, and waveforms. This section describes how to manage (delete, rename, and so forth) these files using the file system. Read the sections listed under For More Information on page 3–58 for information on saving hard copies, setups, and waveforms.
  • Page 104 Using the File System NOTE. The amount of free space on the disk is shown in the upper right corner of the display. The display shows the amount in Kbytes (or in Mbytes if the free space is 1 Mbyte or more). Bytes are only shown if the free space is less than 1 Kbyte.

  • Page 105: Figure 3–36: File System — Labelling Menu

    Using the File System Figure 3–36: File system — Labelling menu Copying a File or To copy a file or directory, turn the general purpose knob until it scrolls the Directory cursor over the name of the file to copy. Then, press the side menu button Copy. The file menu reappears with the names of directories to copy to.
  • Page 106 Using the File System Setting Confirm Delete To turn on or off the confirm delete message, toggle the side-menu button Confirm Delete. When the confirm delete option is OFF, the oscilloscope can immediately delete files or directories. When the confirm option is ON, the oscilloscope warns you before it deletes files and gives you a chance to reconsider.

  • Page 107: Using The Utility Menu

    Using the Utility Menu The utility menu is actually four menus in one. Access these menus by pressing the UTILITY button (Figure 3–37) and then the leftmost main-menu button. The pop-up menu (see Figure 3–38) shows these options. The Config menu offers Tek Secure (which overwrites all setup and reference memories) and the software version identifier as main menu selections.

  • Page 108: Setting The Date And Time

    Using the Utility Menu Figure 3–38: The utility pop-up menu Setting the Date and Time If you need to set the date and time of the oscilloscope, do the following steps: 1. Press the front-panel button UTILITY, the main-menu button System, and then select the popup-menu item Config 2.

  • Page 109: Figure 3–39: Date And Time Display

    Using the Utility Menu Date and Time display Figure 3–39: Date and time display 3. Press the side-menu button Year, Day Month, Hour, or Minute. Use the general purpose knob to set the parameter you have chosen to the value desired.
  • Page 110 Using the Utility Menu 3–62 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 111 Appendices...

  • Page 113: Appendix A: Specifications

    Appendix A: Specifications This appendix contains complete specifications for the TDS 340A, TDS 360, and TDS 380. The specifications are divided into three subsections, one for each of three classes of traits: Warranted Characteristics, Typical Characteristics, and Nominal Traits. Warranted Characteristics Warranted characteristics are described in terms of quantifiable performance limits that are warranted.

  • Page 114: Table A-2: Warranted Characteristics - Time Base System

    Appendix A: Specifications Table A–1: Warranted characteristics — signal acquisition system (Cont.) The minimum single pulse widths for guaranteed 50% or greater amplitude capture are as follows: Name Description Accuracy, Offset Volts/Div setting Offset accuracy 2 mV/div – 99.5 mV/div (0.4% |Net Offset + 3 mV + 0.1 div V/div setting) 100 mV/div –...

  • Page 115: Table A-3: Warranted Characteristics - Triggering System

    Appendix A: Specifications Table A–3: Warranted characteristics — triggering system Name Description Accuracy, Trigger Level, DC Coupled Trigger source Sensitivity CH1 or CH2 (3% of |Setting – Net Offset | + 0.2 div volts/div setting + Offset Accuracy) External (6% of |Setting| + 20 mV) External/10 (6% of |Setting| + 200 mV) Sensitivity, Edge-Type Trigger, DC...

  • Page 116: Table A-5: Warranted Characteristics - Environmental

    Appendix A: Specifications Table A–5: Warranted characteristics — environmental Name Description Atmospherics Temperature without diskette in floppy disk drive: +4 C to +50 C, operating; –22 C to +60 C, non-operating Temperature with diskette in floppy disk drive: +10 C to +50 C, operating or non-operating Relative humidity without diskette in floppy disk drive: to 80% at or below +29 C, or to 20% from +30 C to +50 C, operating;...

  • Page 117: Typical Characteristics

    Appendix A: Specifications Typical Characteristics Typical characteristics are described in terms of typical or average performance. Typical characteristics are not warranted. Table A–6: Typical characteristics — signal acquisition system Name Description Accuracy, DC Gain, Envelope 3% for sec/div settings from 5 Sec/Div to 25 sec/div; Acquisition Mode 2% for sec/div settings from 10 s/div to 5 ns/div (TDS 340A);...

  • Page 118: Table A-7: Typical Characteristics - Triggering System

    Appendix A: Specifications Table A–7: Typical characteristics — triggering system Name Description Error, Trigger Position, Edge Triggering Acquire mode Trigger-position error Sample, Average (1 WI + 2 ns) Peak Detect, Envelope (2 WI + 2 ns) Sensitivity, Video-Type Trigger Source Typical sensitivity CH1 or CH2 0.6 division of video sync signal...

  • Page 119: Nominal Traits

    Appendix A: Specifications Table A–9: Typical characteristics — data handling Name Description Time, Data-Retention, Nonvolatile 5 Years Memory The time that reference waveforms, stored setups, and calibration constants are retained when there is no power to the oscilloscope. Data is maintained by a lithium poly-carbon monofluoride battery. Nominal Traits Nominal traits are described using simple statements of fact such as “Two, identical”...

  • Page 120: Table A-11: Nominal Traits - Time Base System

    Appendix A: Specifications Table A–11: Nominal traits — time base system Name Description Range, Sample-Rate TDS 340A: 10 Samples/s to 500 MSamples/s in a 1–2–5 sequence TDS 360: 10 Samples/s to 1 GSamples/s in a 1–2–5 sequence TDS 380: 10 Samples/s to 2 GSamples/s in a 1–2–5 sequence Range, Seconds/Division TDS 340A: 5 ns/div to 5 s/div in a 1–2.5–5 sequence TDS 360: 2.5 ns/div to 5 s/div in a 1–2.5–5 sequence...

  • Page 121: Table A-13: Nominal Traits - Display System

    Appendix A: Specifications Table A–13: Nominal traits — display system Name Description CRT Type 7-inch (17.95 cm) diagonal, magnetic deflection; horizontal raster-scan; P31 green phosphor Video Display Resolution 640 pixels horizontally by 480 pixels vertically Display area is 5.04 inch (12.92 cm) horizontally by 3.78 inch (9.69 cm) vertically Waveform Display Graticule A single graticule 401 501 pixels (8 10 divisions, with divisions that are approximately 1 cm by 1 cm)

  • Page 122: Table A-16: Nominal Traits - Mechanical Characteristics

    Appendix A: Specifications Table A–16: Nominal traits — mechanical characteristics Name Description Weight Standard 7.0 kg (15.5 lbs) stand-alone instrument; 8.6 kg (19 lbs) with front cover, accessories, and accessories pouch installed; 12.9 kg (28.5 lbs) when packaged for domestic shipment Rackmount 6.6 kg (14.5 lbs), plus weight of rackmount parts (Option 1R);...

  • Page 123: Figure A–1: Tds 340A, Tds 360, And Tds 380 Dimensions

    Appendix A: Specifications 471 mm 327.2 mm (18.55 in.) (12.88 in.) 165 mm (6.5 in.) 308.1 mm (12.13 in.) 569 mm (22.4 in.) 381 mm (15 in.) Figure A–1: TDS 340A, TDS 360, and TDS 380 dimensions A–11 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 124: Table A-17: Certifications And Compliances

    Appendix A: Specifications Table A–17: Certifications and compliances EC Declaration of Conformity Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage Directive 73/23/EEC for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EMC Directive 89/336/EEC: EN 55011 Class B Radiated and Conducted Emissions...

  • Page 125: Appendix B: Performance Verification

    Appendix B: Performance Verification The procedure in this appendix verifies that the TDS 340A, TDS 360, and TDS 380 oscilloscopes meet warranted specifications. Depending on what you want to accomplish, you may prefer to perform another procedure you can find elsewhere in this manual.

  • Page 126: Figure B–1: Menu Locations

    Appendix B: Performance Verification the five buttons to the right of the display. “Pop-up menu” refers to a menu that pops up when a main menu button is pressed. Where instructed to use a front-panel button or knob, select from a main or side menu, or verify a readout or status message, the name of the button or knob appears in boldface type.

  • Page 127: Table B-1: Test Equipment

    Sine Wave Generator Leveling Procedure on page B–14 for information on obtaining a leveled output from an unleveled sine wave generator If available, you can use a Tektronix SG504 Leveled Sine Wave Generatior in place of the example equipment.

  • Page 128: Test Record

    Appendix B: Performance Verification Test Record Photocopy this page and use it to record the performance test results for your instrument. TDS 340A, TDS 360, and TDS 380 test record Instrument Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: Performance test Minimum...

  • Page 129: Performance Test Overview

    Appendix B: Performance Verification Performance Test Overview The procedures are in three groupings: Signal Acquisition System Checks, Time Base System Checks, and Triggering System Checks. They check all the characteristics that appear in boldface type under Warranted Characteristics on page A–1. Prerequisites The tests in this subsection comprise an extensive, valid confirmation of performance and functionality when the following requirements are met:...

  • Page 130: Figure B–2: Hookup For Dc Voltage Measurement Accuracy Check

    Appendix B: Performance Verification 2. Connect the output of a DC calibration generator through a dual-banana connector followed by a 50 precision coaxial cable to CH 1, as shown in Figure B–2. DC Calibrator Output Sense Dual banana to BNC adapter Coaxial cable Figure B–2: Hookup for DC voltage measurement accuracy check 3.

  • Page 131: Table B-2: Dc Accuracy

    Appendix B: Performance Verification Table B–2: DC accuracy Vertical scale Position Generator setting setting (divs) setting Offset setting Accuracy limits +100 V +98 V +97.1 V to +98.9 V 200 mV +10 V +8.4 V +8.28 V to +8.52 V 50 mV –5 –1 V...

  • Page 132: Figure B–3: Hookup For Analog Bandwidth Check

    Appendix B: Performance Verification Check Analog Bandwidth Equipment Required: One leveled sine wave generator (Item 7 or 8), one 50 precision cable (Item 2), and one 50 termination (Item 1). Time Required: Approximately 20 minutes. Prerequisites: See page B–5. Procedure: 1.

  • Page 133: Figure B–4: Measuring Analog Bandwidth

    Appendix B: Performance Verification 8. Set the generator output so the CHx Pk-Pk readout equals 60 mV. 9. Press SET LEVEL TO 50% as necessary to trigger the display. 10. Increase the frequency of the generator output to 100 MHz (TDS 340A), 200 MHz (TDS 360), or 400 MHz (TDS 380).

  • Page 134: Time Base System Checks

    Appendix B: Performance Verification 19. Disconnect the test hook up from the CH 2 input connector. Time Base System Checks This procedure checks those characteristics that relate to the Main and Delayed time base system and are listed as checked under Warranted Characteristics in the Specifications section.

  • Page 135: Trigger System Checks

    Appendix B: Performance Verification 7. Adjust the horizontal POSITION to move the trigger T to the right and on to the screen. Continue to position the trigger T to align it to the center vertical graticule line. 8. Press the main menu button Time Base; then press the side menu button Delayed Only.

  • Page 136: Figure B–6: Hookup For Trigger Sensitivity Check

    Appendix B: Performance Verification Procedure: 1. Press SAVE/RECALL SETUP Recall Factory Setup OK Confirm Factory Init. 2. Set the vertical SCALE to 500 mV/div. 3. Set the horizontal SCALE to 10 ns/div. 4. Press TRIGGER MENU Mode Normal. 5. Press ACQUIRE Mode Average 16.

  • Page 137: Figure B–7: Measuring Trigger Sensitivity

    Appendix B: Performance Verification 15. Press SET LEVEL TO 50%. Check that a stable trigger is obtained for the test waveform on both the positive and negative slopes (see Figure B–7). (Use the side menu to switch between trigger slopes; use the trigger LEVEL knob to stabilize the trigger if required.) First, set a signal with an amplitude at the minimum trigger...

  • Page 138: Sine Wave Generator Leveling Procedure

    Appendix B: Performance Verification 25. Repeat steps 14 and 15 for the external trigger. 26. Disconnect the test hookup. Trigger Level Accuracy, Trigger level accuracy is verified by the successful completion of the Self Tests DC Coupled and the DC voltage measurement accuracy procedure on page B–5. This completes the performance verification procedure.

  • Page 139: Figure B–8: Hookup For Sine Wave Generator Leveling

    Appendix B: Performance Verification Sine wave Level Digitizing oscilloscope generator meter Input Output Power splitter Attenuators (if necessary) Power sensor Figure B–8: Hookup for sine wave generator leveling B–15 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 140 Appendix B: Performance Verification B–16 TDS 340A, TDS 360 & TDS 380 User Manual...

  • Page 141: Appendix C: Options And Accessories

    6, 7, 8 Ground Options A1–A5: Besides the standard North American, 110 V, 60 Hz power cord, Tektronix ships International Power Cords any of five alternate power cord configurations with the oscilloscope when ordered by the customer (see Table C–2).

  • Page 142: Table C-3: Language Options

    Options (The standard warranty appears immediately following the title page in this manual.) Option M2: Tektronix provides three years of warranty plus two years remedial service. Option M3: Tektronix provides three years of warranty plus two years remedial service and four oscilloscope calibrations.

  • Page 143: Table C-4: Standard Accessories

    Appendix C: Options and Accessories Standard Accessories The standard accessories listed in Table C–4 come with the TDS 340A, TDS 360, and TDS 380. (Refer to Table C–3 for manual part numbers.) Table C–4: Standard accessories Accessory Reference User Manual U.S.

  • Page 144: Accessory Probes

    Appendix C: Options and Accessories Accessory Probes These are other types of probes you can use with the TDS 340A, TDS 360, and TDS 380. You can order the following probes separately: P6101B 1X Passive Probe P6129B Switchable 1X–10X Passive Probe (not recommended for the TDS 360 or TDS 380) P6408 TTL Logic Probe P5100 High Voltage Probe...

  • Page 145: General Care

    Appendix D: General Care and Cleaning General Care Protect the oscilloscope from adverse weather conditions. The oscilloscope is not waterproof. CAUTION. To avoid damage to the oscilloscope, do not expose it to sprays, liquids, or solvents. Cleaning Inspect the oscilloscope as often as operating conditions require. To clean the oscilloscope exterior, perform the following steps: 1.
  • Page 146 Appendix D: General Care and Cleaning D–2 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 147 Glossary...
  • Page 149 Glossary AC Coupling A mode that blocks the DC component of a signal but passes the dynamic (AC) component of the signal. Useful for observing an AC signal that is normally riding on a DC signal. Acquisition The process of sampling signals from input channels, digitizing the samples, processing the results into data points and assembling the data points into a waveform record.

  • Page 150: Tds 340A, Tds 360 & Tds 380 User Manual

    Glossary Average Acquisition Mode In this mode the oscilloscope acquires and displays a waveform that is the averaged result of several acquisitions. This reduces the apparent noise. The oscilloscope acquires data as in the sample mode and then averages it according to a specified number of averages.
  • Page 151 Glossary Ground (GND) Coupling Coupling option that disconnects the input signal from the vertical system. Hard Copy An electronic copy of the display in a format useable by a printer or plotter. Holdoff, Trigger A specified amount of time after a trigger signal that elapses before the trigger circuit will accept another trigger signal.
  • Page 152 Glossary Roll An acquisition mode useful at slow horizontal scale settings. Roll mode allows you to view the waveform as it is acquired point-by-point. The waveform appears to roll across the display. Sample Acquisition Mode The oscilloscope creates a record point by saving the first sample during each acquisition interval.
  • Page 153 Glossary waveform record. The oscilloscope displays the value of the active (move- able) cursor with respect to trigger and the time value between the bars. Video Trigger Triggering on the sync pulse of a composite video signal. XY Format A display format that compares the voltage level of two waveform records point by point.
  • Page 154 Glossary Glossary–6 TDS 340A, TDS 360 & TDS 380 User Manual...
  • Page 155 Index...
  • Page 157 Index Aborting a hard copy, 3–41 Bandwidth AC input coupling, 3–4 analog, 1–1 AC trigger coupling, 3–12 autoset default, 2–16 AC trigger source, 3–12 selecting, 3–5 Accessories Burst width measurement, 3–19 cables, C–4 optional, C–3–C–4 pouch, C–3 probes, C–4 Cables, C–4 standard, C–3–C–4 Cal menu, 3–59 ACQUIRE button, 2–5, 3–25...
  • Page 158 Index Coupling Display AC, 3–4, Glossary–1 contrast, 3–28 DC, 3–4 controls, 2–1, 3–27 ground, 3–4, Glossary–3 dot accumulate, 3–28 input, 3–4 dots, 3–28 trigger, 3–12 format, 3–28 AC, 3–12 autoset default, 2–15 DC, 3–12 intensity, 3–28 HF reject, 3–12 autoset default, 2–15 LF reject, 3–13 text and graticule, 3–28 noise reject, 3–13...
  • Page 159 Index GPIB interface, 3–42, Glossary–2 cables, C–4 Factory setup, 3–52 port, 2–8 Fall time measurement, 3–19 talk only, 3–43 Fast Fourier Transforms (FFTs), applications, 3–31 Graphical user interface, 1–1, 2–9 FFT, definition, Glossary–2 Graticule, full or frame, 3–28 FFT frequency domain record, 3–36 Graticule intensity, 3–28 FFT math waveform, 3–31 Ground coupling, 3–4, Glossary–3...
  • Page 160 Index Measurements, 3–17 amplitude, 3–20 I/O interface field upgrade kit, C–3 automated, 1–1, 3–17 Input channels, 1–1 activating, 3–18 Input coupling, 3–4 burst width, 3–19 Inputs cycle mean, 3–20 CH 1 and CH 2, 2–7 cycle RMS, 3–20 EXT TRIG, 2–7 fall time, 3–19 Installation, 1–2 frequency, 3–19...
  • Page 161 Index POSITION knob horizontal, 2–3 Negative duty cycle measurement, 3–19 vertical, 2–2 Negative overshoot measurement, 3–19 Positive duty cycle measurement, 3–19 Negative width measurement, 3–19 Positive overshoot measurement, 3–19 Noise reject trigger coupling, 3–13 Positive width measurement, 3–19 Nominal specifications, A–7 Power Normal trigger mode, 3–13, Glossary–3 connector, 1–2, 2–8...
  • Page 162 Index Rear panel, 2–8 Scale, vertical, 3–37 label, 1–2 SCALE knob power connector, 1–2, 2–8 horizontal, 2–3 Recalling vertical, 2–2 front panel setups, 3–51 Scope camera, C–3 the factory setup, 3–52 Seconds per division, fastest setting, 1–1 waveforms, 3–47 SELECT button, 2–5, 3–20, 3–23 Record length, 1–1, Glossary–3 Selected waveform, Glossary–4 REF 1, 2–2...
  • Page 163 Index Trigger TRIGGER MENU button, 2–4, 3–11 controls, 2–4 Triggering, 3–11 coupling edge, 3–11 AC, 3–12 external, 3–12 autoset default, 2–15 on the ECL switching threshold, 3–13 DC, 3–12 on the TTL switching threshold, 3–13 HF reject, 3–12 video, 3–14 LF Reject, 3–13 TTL switching threshold, 3–13 noise reject, 3–13...
  • Page 164 Index Width measurement, 3–19 Window, Hanning, 3–38 Warranted specifications, A–1 performance conditions for, A–1 Warranty-plus service options, C–2 WAVEFORM OFF button, 2–2, 3–18, 3–47 Waveform Rate, A–8 format, Glossary–5 Waveform record, FFT, 3–36 mode, 3–28 Waveform record icon, 2–6 XYZs of Analog and Digital Oscilloscopes, xi Waveforms intensity, 3–28 inverting, 3–4...

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