Tektronix TDS3LIM User manual

User Manual

TDS3LIM
Limit Test
Application Module

071-0934-01

*P071093401*

071093401

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. Specifications and
price change privileges reserved.

TEKTRONIX, TEK, TEKPROBE, and TekSecure are registered
trademarks of Tektronix, Inc.

DPX, WaveAlert, and e*Scope are trademarks of
Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA

For product information, sales, service, and technical support:

H In North America, call 1-800-833-9200.

H Worldwide, visit www.tektronix.com to find contacts in

your area.

Contents

Safety Summary 2.............................

Installing the Application Module 5................

Limit Testing Concepts 5.......................

TDS3LIM Overview 8...........................

Accessing Limit Test Menus 9....................

Creating a Limit Test Template 11..................

Selecting a Limit Test Input 14....................

Selecting Limit Test Responses 15.................

Starting Limit Testing 16.........................

TDS3LIM Conventions 17........................

Menus 19....................................

1

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. Electrostatic discharge (ESD) can

damage components in the oscilloscope and its
accessories. To prevent ESD, observe these
precautions when directed to do so.

Use a Ground Strap. Wear a grounded antistatic wrist strap

to discharge the static voltage from your body while
installing or removing sensitive components.

UseaSafeWorkArea.Do not use any devices capable of

generating or holding a static charge in the work area
where you install or remove sensitive components.
Avoid handling sensitive components in areas that have a
floor or benchtop surface capable of generating a static
charge.

2

Handle Components Carefully. Do not slide sensitive

components over any surface. Do not touch exposed
connector pins. Handle sensitive components as little as
possible.

Transport and Store Carefully. Transport and store sensitive

components in a static-protected bag or container.

Manual Storage

The oscilloscope front cover has a convenient place to
store this manual.

3

4

Installing the TDS3LIM Application Module

Refer to the TDS3000, TDS3000B, and TDS3000C
Series Application Module Installation manual for

instructions on installing and testing the application
module.

Limit Testing Concepts

Limit testing is the ability to compare an active signal
with a template waveform. The following figure shows
an active waveform (dark sine wave) being compared to
a template waveform (shaded area).

5

Any part of the active waveform that exceeds the tem­plate waveform’s envelope is a limit test waveform
violation, which the oscilloscope highlights. You can set
the oscilloscope to respond to a limit test violation by
stopping limit testing, emitting a beep, and so on. The
following figure shows the highlighted (black) part of
the active waveform that exceeds the limit test envelope.

A template is an envelope waveform that consists of
minimum/maximum (min/max) pairs of sample points.
Template envelope waveforms created from 500 point
source waveforms contain 250 min/max pairs; Template
envelope waveforms created from10K point waveforms
contain 5000 min/max pairs.

6

The following figure represents how the oscilloscope
creates the template waveform limit test envelope from
user-entered vertical and horizontal division units.
Division units are referenced to graticule divisions,
where 1 major division contains 1000 millidivisions, or
mdivs. The minimum mdiv unit is 20, which equals one
screen pixel.

Vertical
limits

+

Horizontal
limits

=

Resulting
template

+

When a source waveform is compared with an envelope
waveform, each source waveform sample point value is
compared to the vertical and horizontal min/max values
of the corresponding envelope waveform sample point.
Any source waveform data point that is not equal to or
within the corresponding template envelope min/max
values is a violation.

=

7