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Tektronix TDS3TMT User Manual
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Tektronix TDS3TMT User Manual

Telecom mask test application module
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*P071064802*
071064802
User Manual
TDS3TMT
Telecom Mask Test
Application Module
071-0648-02

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Summary of Contents for Tektronix TDS3TMT

  • Page 1 User Manual TDS3TMT Telecom Mask Test Application Module 071-0648-02 *P071064802* 071064802...
  • Page 2 Copyright E Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material.

  • Page 3: Table Of Contents

    ......Installing the TDS3TMT Application Module ..

  • Page 4: Safety Summary

    Safety Summary To avoid potential hazards, use this product only as specified. While using this product, you may need to access other parts of the system. Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system. Preventing Electrostatic Damage CAUTION.
  • Page 5 Do not slide sensitive Handle Components Carefully. components over any surface. Do not touch exposed connector pins. Handle sensitive components as little as possible. Transport and Store Carefully. Transport and store sensitive components in a static-protected bag or container. Manual Storage The oscilloscope front cover has a convenient place to store this manual.

  • Page 7: Installing The Tds3Tmt Application Module

    The TDS3TMT application module provides compliance masks for testing to ITU-G.703 and ANSI T1.102 telecommunications standards, up to STS-1 (52 Mb/s) line rates. Multiple Channel Testing The TDS3TMT application module enables you to perform multiple simultaneous testing on all active oscilloscope channels.

  • Page 8: Accessing Tds3Tmt: Quickmenu

    You can connect the oscilloscope to do automated mask testing by using the RS- -232, GPIB, or LAN commu- nication ports. Accessing TDS3TMT: QuickMenu Push the QuickMenu front-panel button to display the quick menu items. Push the Menu bottom screen button to select and display the Telecom bottom and side menu items.

  • Page 9: Accessing Tds3Tmt: Utility Menu

    Accessing TDS3TMT: Utility Menu Push the UTILITY front-panel button to display the utility menu items. Push the System bottom screen button to display Apps. Push the Module bottom screen button to select Telecom. The screen displays the telecom bottom and side menu items.

  • Page 10: Conventions

    Conventions The following conventions apply to all TDS3TMT functions: H You can perform multiple waveform mask testing by connecting signals to all oscilloscope input channels. H While in Telecom Mask test mode, the AUTOSET front-panel button automatically sets the oscilloscope horizontal, vertical, and trigger parameters, and positions the waveform in the selected mask.

  • Page 11: Tds3Tmt Menu

    TDS3TMT Menu Table 1: Utility Menu: Type = Apps, Module = Telecom Bottom Side Description Mask- None (Off) ITU-T standard masks. Each Type DS-0 Single 64 kb/s mask sets the oscilloscope (ITU-T) DS-0 Double 64 kb/s vertical, horizontal, and DS-0 Data Contra-...
  • Page 12 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Mask None (Off) ANSI T1.102 standard Type DS1 1.544 Mb/s masks. Each mask sets the (T1.102) DS1A 2.048 Mb/s oscilloscope vertical, hori- DS1C 3.152 Mb/s zontal, and trigger controls to DS2 6.312 Mb/s acquire that standard’s DS3 44.736 Mb/s...
  • Page 13 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Current Status area that displays the Mask name of the currently se- lected mask. Mask Highlight Violations Turns on mask violation Control highlighting. Waveforms that violate mask parameters leave highlighted points on the mask that are the color of the failing waveform.
  • Page 14 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Mask Vertical Margin When enabled, adjusts the Control Percentage User mask vertical margins (User mask only) (User mask only) as a percent of the nominal as a percent of the nominal waveform amplitude for the mask standard.
  • Page 15 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Pass/ Repeat On When set to On, repeats the Fail Completion pass/fail test cycle using the Mask current settings. The status Test Test area Failures/Test values area Failures/Test values (cont.) show how many times the...
  • Page 16 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Pass/ Violation Threshold Sets how many failed wave- Fail For Failure forms define a failed test. Mask Use the general purpose Test Test knob to set the value. (cont.) Pre-Test Delay Sets a time value that delays...
  • Page 17 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Pass/ Hard Copy On Failure When On, causes the oscil- Fail loscope to send the screen Mask image to the hard copy Test device when the pass/fail (cont.) test status changes from Passing to Failing.
  • Page 18 Table 1: Utility Menu: Type = Apps, Module = Telecom (cont.) Bottom Side Description Show Violations/ Displays pass/fail test status Results Waveforms, ... information: the number of waveforms that have violated the mask per number of waveforms tested in the waveforms tested in the current test, and the number of failed tests per the total...
  • Page 19 Standards and Pulse Amplitudes. For those cases where a mask standard defines a valid pulse amplitude as being within a range of values, the TDS3TMT mask is drawn for the maximum permitted amplitude. For those cases where a mask standard does not define pulse amplitude, the TDS3TMT mask is drawn for a nominal 1 V pulse.
  • Page 20 TDS3000, TDS3000B, and TDS3000C Series Programmer Manual for .isf file format information. Proper Signal Termination. Make sure to correctly terminate communication test signals. Tektronix offers optional AMT75 adapters for correct communication signal termination. Pass/Fail Testing: Polarity. When polarity is set to both,...
  • Page 21 Running Mask Test Indefinitely. To run a mask test indefinitely while counting the number of violations, set Number of Waveforms to infinity (∞). Triggering. Selecting a mask standard automatically sets trigger parameters for that standard. However, to assign specific trigger parameters to a mask (most likely for a new User mask), push the Trigger MENU button, selecting Comm, and selecting the mask standard to use for triggering.
  • Page 22 On-Screen Mask Positions. Many of the mask standards have their mask drawn on the right side of the graticule to allow enough room to the left for acquiring sufficient serial trigger data. When using the Lock Mask To Waveform feature, be careful not to move the mask too far left or else you may lose your serial trigger.
  • Page 23 Autofit Key Points. The following are some Autofit-spe- cific key points: H The Autofit radius defines the size of a square search grid radius of (2 ¢ radius + 1) ¢ (2 ¢ radius + 1) pixels, centered on the waveform position. Autofit moves the waveform using a spiral pattern, testing for mask violations at each position.
  • Page 24 H When Autofit moves the waveform, it only moves the location where the waveform is drawn on the display. It does not change any of the underlying vertical, horizontal, or trigger parameters used to acquire the waveform. A consequence of this is that when moving the waveform left (or right), the waveform points at the right (or left) edge of the screen will be blank if the horizontal settings are such that the entire acquired...
  • Page 25 Automated Pass/Fail Testing Process. The recom- mended automated pass/fail testing process is: Set the oscilloscope to default settings using the SAVE/RECALL- ->Recall Factory Setup menu. Set the Graticule type to Frame (DISPLAY- ->Graticule menu). Select the mask standard. Turn off all waveforms not being tested. Connect the appropriate input signals.

  • Page 26: Telecom Pass/Fail Mask Test Example

    500 waveforms, then stop. Use the Telecom QuickMenu to set the TDS3TMT mask parameters as listed in the table. Connect the signal to CH 1 on the oscilloscope, then press the AUTOSET front-panel button.
  • Page 27 Telecom QuickMenu (cont.) Menu Item Parameter Value Pass/Fail Send hardcopy to Off (unchecked) printer Send waveform to file Off (unchecked) Beep on failure On (checked) Beep on completion On (checked) Repeat test Off (unchecked) Waveforms Threshold Polarity Positive Use the upper menu button to select a response, and then use the lower menu button to enable or disable the selected response.