Tektronix TDS 640A, TDS 620A, TDS 644A User Manual

0 (0)

User Manual

TDS 620A, 640A & 644A

Digitizing Oscilloscopes

070-8715-04

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.

Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070±1000

TEKTRONIX, TEK, TEKPROBE, and SCOPE-MOBILE are registered trademarks of Tektronix, Inc.

Microsoft is a registered trademark of Microsoft Corporation.

IBM is a registered trademark of International Business Machines.

GPIB-PCII and GPIB-PCIIA are registered trademarks of National Instruments Corporation. Epson is a registered trademark of Epson America, Inc.

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WARRANTY

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. If a product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by 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.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

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C D C

ektronix Holland N

Marktweg 7 A

8444 AB Heerenveenhe Netherlands

declare under sole responsibility that the

DS D

meet the intent of Directive 89 6 EEC for Electromagnetic Compatibility

Compliance was demonstrated to the following specifications as listed in the official Journal of the European Communities:

EN 5 8 - Emissions:

EN 55 adiated

EN 55 Conducted EN 6 555ower Harmonics

EN 5 8 - Immunity:

IEC 8 - Electrostatic Discharge

IEC 8 - F adiated

IEC 8 -4 Fast ransients

IEC 8 -5 urge

We c e

This is the User Manual for the ' $( # # ! #.

Re ated Ma ua s

The G$$ $"$ section familiarizes you with the operation of the digitiz1 ing oscilloscope.

! "$ B # # covers basic principles of the operation of the oscillo1 scope. These articles help you understand why your instrument works the way it does.

The " section teaches you how to perform specific tasks. See page 11 for a complete list of tasks covered in that section.

The A!! # provide an options listing, an accessories listing, and other useful information.

The following documents are related to the use or service of the digitizing oscilloscope:

The ' $( # # ! # " " " % (Tektronix part number 0701 70 1XX) describes using a computer to control the digitizing oscilloscope through the GPIB interface.

The ' !$ " " #$"%$ % (Tektronix part number 0701 74 1XX) describes use of the video trigger option (for TDS oscilloscopes equipped with that option only).

The A A A A A A A " (Tektro1 nix part number 0701 7111XX) gives you a quick overview of how to operate the digitizing oscilloscope.

The A A A " " "$ (Tektronix part number 0701 7171XX) tells how to verify the performance of the digitizing oscilloscope.

The A A A "& % (Tektronix part number 0701 71 1XX) provides information for maintaining and servicing the digitizing oscilloscope to the module level.

TDS User Ma ua

Welcome

Conventions	In the Getting Started and Reference sections, you will find various proce-
	dures which contain steps of instructions for you to perform. To keep those
	instructions clear and consistent, this manual uses the following conven-
	tions:
	In procedures, names of front panel controls and menu labels appear in
	boldface print.
	Front-panel and menu names also appear in the same upper and lower
	case as is used on the oscilloscope. Front panel names are all upper
	case letters, such as, VERTICAL MENU, and CH 1.
	Instruction steps are numbered. The number is omitted if there is only
	one step.
	When steps require that you make a sequence of selections using
	front-panel controls and menu buttons, an arrow ( ) marks each
	transition between a front-panel button and a menu, or between menus.
	Also, whether a name is a main menu or side menu item is clearly
	indicated: Press VERTICAL MENU Coupling (main) DC (side)
	Bandwidth (main) 100 MHz (side).
	Using the convention just described results in instructions that are
	graphically intuitive and simplifies procedures. For example, the instruc-
	tion just given replaces these five steps:
	. Press the front panel button VERTICAL MENU.
	. Press the main menu button Coupling.
	. Press the side-menu button DC.
	4. Press the main menu button Bandwidth.
	5. Press the side menu button 100 MHz.
	Sometimes you may have to make a selection from a popup menu:
	Press TRIGGER MENU Type (main) Edge (popup). In this exam-
	ple, you repeatedly press the main menu button Type until Edge is
	highlighted in the pop-up menu.

Welcome

Table of Contents

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Getting Started

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	181
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	183
Setting Up for the Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	187
Example 1: Displaying a Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . .	188
Example 2: Multiple Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1814
Example 3: Automated Measurements . . . . . . . . . . . . . . . . . . . . . . . .	1818
Example 4: Saving Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1824

Operating Basics

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	281
At a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	283
Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2813
Acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2819
Scaling and Positioning Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . .	2822
Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2826

Reference

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	381
Acquisition Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	383
Autoset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	388
Color (TDS 644A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3810
Cursor Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3815
Delayed Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3820
Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3826
Edge Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3832
Fast Fourier Transforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3836

TDS 620A, 640A 644A User Manual

iii

Table of Contents

File System (Optional on TDS 620A TDS 640A) . . . . . . . . . . . . . .	3:53
Hardcopy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:57
Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:65
Horizontal Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:66
Limit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:70
Logic Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:75
Measurement System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:83
Probe Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:94
Probe Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:100
Probe Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:102
Pulse Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:109
Remote Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:116
Saving and Recalling Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:120
Saving and Recalling Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:123
Selecting Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:126
Signal Path Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:128
Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:130
Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:132
Vertical Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:136
Waveform Differentiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:139
Waveform Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:143
Waveform Math . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:148
Zoom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3:151

Appendices

Appendix A: Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . .	A:1
Appendix B: Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A:7
Appendix C: Packaging for Shipment . . . . . . . . . . . . . . . . . . . . . . . . .	A:21
Appendix D: Factory Initialization Settings . . . . . . . . . . . . . . . . . . . . .	A:23

Glossary

Index

Contents

List of Figures

Figure 1?1:>Rear Panel Controls Used in Start Up . . . . . . . . . . . . . .	1?4
Figure 1?2:>ON/STBY Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1?5
Figure 1?3:>Connecting a Probe for the Examples . . . . . . . . . . . . .	1?7
Figure 1?4:>SETUP Button Location . . . . . . . . . . . . . . . . . . . . . . . . . . .	1?8
Figure 1?5:>The Displayed Setup Menu . . . . . . . . . . . . . . . . . . . . . . .	1?8
Figure 1?6:>Trigger Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1?9
Figure 1?7:>The Display After Factory Initialization . . . . . . . . . . . . .	1?10
Figure 1?8:>The VERTICAL and HORIZONTAL Controls . . . . . . . . .	1?11
Figure 1?9:>TRIGGER Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1?12
Figure 1?10:>AUTOSET Button Location . . . . . . . . . . . . . . . . . . . . . . .	1?12
Figure 1?11:>The Display After Pressing Autoset . . . . . . . . . . . . . . .	1?13
Figure 1?12:>Display Signals Requiring Probe Compensation . . .	1?13
Figure 1?13:>The Channel Buttons and Lights . . . . . . . . . . . . . . . . .	1?14
Figure 1?14:>The Vertical Main Menu and Coupling Side Menu . .	1?16
Figure 1?15:>The Menus After Changing Channels . . . . . . . . . . . . .	1?17
Figure 1?16:>Measure Main Menu and Select Measurement
Side Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1?18
Figure 1?17:>Four Simultaneous Measurement Readouts . . . . . . .	1?20
Figure 1?18:>General Purpose Knob Indicators . . . . . . . . . . . . . . . .	1?21
Figure 1?19:>Snapshot of Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . .	1?22
Figure 1?20:>Save/Recall Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . .	1?25
Figure 2?1:>Triggered Versus Untriggered Displays . . . . . . . . . . . .	2?13
Figure 2?2:>Trigger Holdoff Time Ensures Valid Triggering . . . . . .	2?16
Figure 2?3:>Slope and Level Controls Help Define the Trigger . . .	2?17
Figure 2?4:>Acquisition: Input Analog Signal Sample and
Digitize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2?19
Figure 2?5:>Real?Time Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2?20
Figure 2?6:>Scaling and Positioning . . . . . . . . . . . . . . . . . . . . . . . . . .	2?22
Figure 2?7:>Aliasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2?24
Figure 2?8:>Graticule Cursor and Automated Measurements . . .	2?26

TDS 620A 640A 644A User Manual

Table of Contents

Figure 289:7Cursor Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2827
Figure 381:7How the Acquisition Modes Work . . . . . . . . . . . . . . . . .	384
Figure 382:7Acquisition Menu and Readout . . . . . . . . . . . . . . . . . . . .	385
Figure 383:7Acquire Menu 9 Stop After . . . . . . . . . . . . . . . . . . . . . . .	386
Figure 384:7Display Menu 9 Setting . . . . . . . . . . . . . . . . . . . . . . . . . .	381
Figure 385:7Display Menu 9 Palette Colors . . . . . . . . . . . . . . . . . . .	3812
Figure 386:7Display Menu 9 Map Reference Colors . . . . . . . . . . . .	3813
Figure 387:7Display Menu 9 Restore Colors . . . . . . . . . . . . . . . . . . .	3814
Figure 388:7Cursor Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3815
Figure 389:7Cursor Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3816
Figure 381 :7H Bars Cursor Menu and Readouts . . . . . . . . . . . . . . .	3817
Figure 3811:7Paired Cursor Menu and Readouts . . . . . . . . . . . . . . .	3818
Figure 3812:7Delayed Runs After Main . . . . . . . . . . . . . . . . . . . . . . . .	382
Figure 3813:7Delayed Triggerable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	382
Figure 3814:7How the Delayed Triggers Work . . . . . . . . . . . . . . . . . .	3822
Figure 3815:7Delayed Trigger Menu . . . . . . . . . . . . . . . . . . . . . . . . . . .	3824
Figure 3816:7Display Menu 9 Style . . . . . . . . . . . . . . . . . . . . . . . . . . .	3826
Figure 3817:7Trigger Point and Level Indicators . . . . . . . . . . . . . . . .	3828
Figure 3818:7Edge Trigger Readouts . . . . . . . . . . . . . . . . . . . . . . . . . .	3832
Figure 3819:7Main Trigger Menu 9 Edge Type . . . . . . . . . . . . . . . . .	3833
Figure 382 :7System Response to an Impulse . . . . . . . . . . . . . . . . .	3837
Figure 3821:7Define FFT Waveform Menu . . . . . . . . . . . . . . . . . . . . . .	3838
Figure 3822:7FFT Math Waveform in Math1 . . . . . . . . . . . . . . . . . . . .	3839
Figure 3823:7Cursor Measurement of an FFT Waveform . . . . . . . .	3841
Figure 3824:7Waveform Record vs. FFT Time Domain Record . . .	3843
Figure 3825:7FFT Time Domain Record vs. FFT Frequency Domain
Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3843
Figure 3826:7How Aliased Frequencies Appear in an FFT . . . . . . .	3847
Figure 3827:7Windowing the FFT Time Domain Record . . . . . . . . .	385
Figure 3828:7FFT Windows and Bandpass Characteristics . . . . . .	3852
Figure 3829:7File Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3853
Figure 383 :7File System 9 Labelling Menu . . . . . . . . . . . . . . . . . . .	3855
Figure 3831:7Utility Menu 9 System I/O . . . . . . . . . . . . . . . . . . . . . . .	3858

Contents

Figure 3?32:>Hardcopy Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?59
Figure 3?33:>Date and Time Display . . . . . . . . . . . . . . . . . . . . . . . . . .	3?61
Figure 3?34:>Connecting the Digitizing Oscilloscope Directly to the
Hardcopy Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?62
Figure 3?35:>Connecting the Digitizing Oscilloscope and Hardcopy
Device Via a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?63
Figure 3?36:>Initial Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?65
Figure 3?37:>Horizontal Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?66
Figure 3?38:>Record View and Time Base Readouts . . . . . . . . . . . .	3?67
Figure 3?39:>Comparing a Waveform to a Limit Template . . . . . . .	3?70
Figure 3?40:>Acquire Menu @ Create Limit Test Template . . . . . .	3?71
Figure 3?41:>Logic Trigger Readouts . . . . . . . . . . . . . . . . . . . . . . . . . .	3?76
Figure 3?42:>Logic Trigger Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?78
Figure 3?43:>Logic Trigger Menu @ Time Qualified TRUE . . . . . . .	3?81
Figure 3?44:>Measurement Readouts . . . . . . . . . . . . . . . . . . . . . . . . .	3?86
Figure 3?45:>Measure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?87
Figure 3?46:>Measure Menu @ Gating . . . . . . . . . . . . . . . . . . . . . . . .	3?88
Figure 3?47:>Measure Menu @ Reference Levels . . . . . . . . . . . . . .	3?90
Figure 3?48:>Measure Delay Menu @ Delay To . . . . . . . . . . . . . . . . .	3?91
Figure 3?49:>Snapshot Menu and Readout . . . . . . . . . . . . . . . . . . . .	3?92
Figure 3?50:>Probe Cal Menu and Gain Compensation Display .	3?96
Figure 3?51:>Re?use Probe Calibration Data Menu . . . . . . . . . . . . .	3?98
Figure 3?52:>How Probe Compensation Affects Signals . . . . . . . .	3?100
Figure 3?53:>P6139A Probe Adjustment . . . . . . . . . . . . . . . . . . . . . . .	3?101
Figure 3?54:>The P6009 and P6015A High Voltage Probes . . . . . .	3?103
Figure 3?55:>A6303 Current Probe Used in the AM 503S Opt. 03	3?105
Figure 3?56:>Pulse Trigger Readouts . . . . . . . . . . . . . . . . . . . . . . . . . .	3?109
Figure 3?57:>Main Trigger Menu @ Glitch Class . . . . . . . . . . . . . . .	3?111
Figure 3?58:>Main Trigger Menu@Runt Class . . . . . . . . . . . . . . . . . .	3?114
Figure 3?59:>Typical GPIB Network Configuration . . . . . . . . . . . . . .	3?117
Figure 3?60:>Stacking GPIB Connectors . . . . . . . . . . . . . . . . . . . . . .	3?117
Figure 3?61:>Connecting the Digitizing Oscilloscope to a
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?118
Figure 3?62:>Utility Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3?119

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vii

Table of Contents

Figure 3=63:<Save/Recall Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . .	3=120
Figure 3=64:<Save Waveform Menu . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=124
Figure 3=65:<More Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=125
Figure 3=66:<The Channel Readout . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=126
Figure 3=67:<Waveform Selection Priority . . . . . . . . . . . . . . . . . . . . .	3=127
Figure 3=68:<Performing a Signal Path Compensation . . . . . . . . . .	3=129
Figure 3=69:<Status Menu > System . . . . . . . . . . . . . . . . . . . . . . . . . .	3=130
Figure 3=70:<Banner Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=131
Figure 3=71:<TRIGGER Controls and Status Lights . . . . . . . . . . . . .	3=132
Figure 3=72:<Example Trigger Readouts . . . . . . . . . . . . . . . . . . . . . . .	3=134
Figure 3=73:<Record View, Trigger Position, and Trigger Level Bar
Readouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=135
Figure 3=74:<Vertical Readouts and Channel Menu . . . . . . . . . . . . .	3=137
Figure 3=75:<Derivative Math Waveform . . . . . . . . . . . . . . . . . . . . . . .	3=140
Figure 3=76:<Peak=Peak Amplitude Measurement of a Derivative
Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=141
Figure 3=77:<Integral Math Waveform . . . . . . . . . . . . . . . . . . . . . . . . .	3=144
Figure 3=78:<H Bars Cursors Measure an Integral Math
Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=145
Figure 3=79:<More Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3=148
Figure 3=80:<Dual Waveform Math Main and Side Menus . . . . . . .	3=150
Figure 3=81:<Zoom Mode with Horizontal Lock Set to None . . . . .	3=152
Figure A=1:<MCross Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A=10
Figure A=2:<Fall Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A=13
Figure A=3:<Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A=17
Figure A=4:<Choosing Minima or Maxima to Use for Envelope
Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A=19

viii

Contents

List of Tables

Table 171:6Fuse and Fuse Cap Part Numbers . . . . . . . . . . . . . . . . . .	174
Table5371:6Autoset Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	379
Table5372:6XY Format Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3730
Table5373:6Logic Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3777
Table5374:6Measurement Definitions . . . . . . . . . . . . . . . . . . . . . . . . . .	3783
Table5375:6Probe Cal Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3798
Table5376:6TDS 600A Compatible Probes . . . . . . . . . . . . . . . . . . . . .	37107
Table5377:6Probes by Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	37108
Table5378:6Pulse Trigger Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .	37110
Table5379:6Zoom Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	37153
Table5A71:6International Power Cords . . . . . . . . . . . . . . . . . . . . . . . . .	A71
Table5A72:6Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A73
Table5A73:6Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A74
Table5A74:6Accessory Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	A75
Table5A75:6Factory Initialization Defaults . . . . . . . . . . . . . . . . . . . . . .	A723

TDS 620A 640A 644A User Manual

Table of Contents

Contents

Sa t

Please take a moment to review these safety precautions. They are provided for your protection and to prevent damage to the digitizing oscilloscope. This safety information applies to all operators and service personnel.

S mbols and T rms	These two terms appear in manuals:
		statements identify conditions or practices that could result in
		damage to the equipment or other property.
		statements identify conditions or practices that could result in
		personal injury or loss of life.

These two terms appear on equipment:

CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equip, ment itself.

DANGER indicates a personal injury hazard immediately accessible as one reads the marking.

This symbol appears in manuals:

Static,Sensitive Devices

These symbols appear on equipment:

DANGER	Protective	ATTENTION
High Voltage	ground (earth)	Refer to
	terminal	manual

TDS Us r Manual

Sa ty

Sp ci ic Pr cautions	Observe all of these precautions to ensure your personal safety and to
	prevent damage to either the digitizing oscilloscope or equipment con,
	nected to it
	Pow r Sourc
	The digitizing oscilloscope is intended to operate from a power source that
	will not apply more than 250 VRMS between the supply conductors or be,
	tween either supply conductor and ground A protective ground connection
	through the grounding conductor in the power cord is essential for safe
	system operation
	Groundin th Di itizin Oscilloscop
	The digitizing oscilloscope is grounded through the power cord To avoid
	electric shock plug the power cord into a properly wired receptacle where
	earth ground has been verified by a qualified service person Do this before
	making connections to the input or output terminals of the digitizing oscillo,
	scope
	Without the protective ground connection all parts of the digitizing oscillo,
	scope are potential shock hazards This includes knobs and controls that
	may appear to be insulators
	Us th Prop r Pow r Cord
	Use only the power cord and connector specified for your product Use only
	a power cord that is in good condition
	Us th Prop r Fus
	To avoid fire hazard use only the fuse specified in the parts list for your
	product matched by type voltage rating and current rating
	Do Not R mov Cov rs or Pan ls
	To avoid personal injury do not operate the digitizing oscilloscope without
	the panels or covers
	El ctric Ov rload
	Never apply a voltage to a connector on the digitizing oscilloscope that is
	outside the voltage range specified for that connector
	Do Not Op rat in Explosiv Atmosph r s
	The digitizing oscilloscope provides no explosion protection from static
	discharges or arcing components Do not operate the digitizing oscilloscope
	in an atmosphere of explosive gases

xii

Sa ty

Product Descr pt on

ektronix D 600A Digitizing scilloscopes are superb tools for acquiring, displaying, and measuring waveforms. heir performance addresses the needs of both benchtop lab and portable applications with the following features:

500 MHz maximum analog bandwidth.

2 Gigasamples/second maximum digitizing rate.

Four channels for acquisition ; the D 640A & 644A let you use and display all four channels simultaneously; the D 620A lets you use and display any two channels simultaneously. All channels can acquire at the maximum digitizing rate.

aveform Math ; Invert a single waveform and add, subtract, multiply, and divide two waveforms. n instruments with Advanced D Math (standard on the D 644A), integrate or differentiate a single waveform or perform an FF (fast fourier transform) on a waveform to display its magnitude or phase versus its frequency.

Eight:bit digitizers.

Up to 2,000:sample record length per channel.

Full G IB software programmability. Hardcopy output using :232 or Centronics ports ( ptional on D 620A & 640A) and the G IB.

Complete measurement and documentation capability.

Intuitive graphic icon operation blended with the

familiarity of traditional horizontal and vertical knobs.

n:line help at the touch of a button.

DS 62 A 64 A 644A User Manua

1 1

Product Description

1 2	Getting Started

Start Up

Before you use the digitizing oscilloscope, ensure that it is properly installed and powered on.

Before You Begin	To ensure maximum accuracy for your most critical measurements, you
	should know about signal path compensation and the proper use of the
	P6139A probe shipped with your oscilloscope as a standard accessory.
	Signal Path Compensation
	Be sure you compensate your oscilloscope for the surrounding temperature.
	This action, called S g a Pa$h C !e #a$ (SPC), ensures maximum
	possible accuracy for your most critical measurements. See S g a Pa$h
	C !e #a$ on page 31128 for a description of and operating information
	on this feature.
	P62 5 Active Probe
	Be sure you use the appropriate probe. Do not use the optional P6205
	Active Probe to measure signals above ±10 volts since errors in signal
	measurement will result. Instead, use the standard accessory P6139A
	Passive Probe or one of the passive probes listed in Appendix A under
	Acce## "' P" be#. The P6139A probe is for measurements up to
	±500 volts.
	CAUT ON
	U# g $he P6205 Ac$ &e P" be $ ea#%"e # g a # g"ea$e" $ha
	±40 & $# a' da age $he !" be.

Operation

To properly install and power on the digitizing oscilloscope, do the following:

Installation

1.Be sure you have the appropriate operating environment. Specifications for temperature, relative humidity, altitude, vibrations, and emissions are included in the TDS 620A, 640A, 644A Pe"f " a ce Ve" f ca$ manu1 al (Tektronix part number 070187171XX).

TDS 62 A 64 A 644A User Manual

1)3

Start Up

2.L'#7' 41#%' (03 %00-+/). D0 5*+4 $y 7'3+(y+/) 5*#5 5*' #+3 +/5#,' #/& 'x*#645 *0-'4 0/ 5*' 4+&'4 0( 5*' %#$+/'5 (8*'3' 5*' (#/ 01'3#5'4) #3' (3'' 0( #/y #+3(-08 0$4536%5+0/4. L'#7' #5 -'#45 5.1 %. (2 +/%*'4) (3'' 0/ '#%* 4+&'.

WARNING

To avoid electrical shock, be sure that the power cord is discon nected before checking the fuse.

3.C*'%, 5*' (64' 50 $' 463' +5 +4 5*' 1301'3 5y1' #/& 3#5+/) (4'' F+)= 63' 1=1). Y06 %#/ 64' '+5*'3 0( 580 (64'4. E#%* (64' 3'26+3'4 +54 08/ %#1 (4'' #$-' 1=1). *' &+)+5+z+/) 04%+--04%01' +4 4*+11'& 8+5* 5*' UL #1= 1307'& (64' +/45#--'&.

4.C*'%, 5*#5 y06 *#7' 5*' 1301'3 '-'%53+%#- %0//'%5+0/4. *' &+)+5+z+/)

04%+--04%01' 3'26+3'4 90 50 250 VAC M, %0/5+/6064 3#/)', 47 Hz 50 63 Hz, #/& .#y 3'26+3' 61 50 300<W.

5.C0//'%5 5*' 1301'3 108'3 %03& (30. 5*' 3'#3=1#/'- 108'3 %0//'%503 (4'' F+)63' 1=1) 50 5*' 108'3 4y45'..

Power Connector

Principal Power Switch

Fuse

Figur 1 1: R ar Pan l Controls Us d in Start Up

Tabl 1 1: Fus and Fus Cap Part Numb rs

Fus		Fus Part	Fus Cap Part
		Numb r	Numb r

.25 +/%* × 1.25 +/%* (UL 198.6, 3AG):		159-0013-00	200-2264-00
6	A FA , 250 V.

5	.. × 20 .. (IEC 127): 5 A ( ),	159-0210-00	200-2265-00

250 V.

1 4	G tting Start d

Start Up

Front Cover Removal

Remove the front cover by grasping its left and right edges and snapping it off of the front subpanel. (When reinstalling, align and snap back on.)

Power On

. Check that the rear+panel principal power switch is on (see Figure + ). The principal power switch controls all AC power to the instrument.

. If the oscilloscope is not powered on (the screen is blank), push the front+panel ON/STBY button to toggle it on (see Figure + ).

The ON/STBY button controls power to most of the instrument circuits.

Power continues to go to certain parts even when this switch is set to

STBY.

Once the digitizing oscilloscope is installed, it is typical to leave the principal power switch on and use the ON/STBY button as the power switch.

ON/STBY Button

Figure 1*2:)ON/STBY Button

TDS 620A 640A 644A User Manual

1*5

Start Up

Self Test

Check the self test results. The digitizing oscilloscope automatically per# forms power#up tests each time it is turned on. It will come up with a display screen that states whether or not it passed self test. (If the self test passed, the status display screen will be removed after a few seconds.)

If the self test fails, call your local Tektronix Service Center. Depending on the type of failure, you may still be able to use the oscilloscope before it is serviced.

Power Off

Toggle the ON/STBY switch to turn off the oscilloscope.

1 6	Getting Started

Setting Up for the Examples

All the examples use the same setup. Once you perform this setup, you do not have to change the signal connections for any of the other examples.

Remove all probes and signal inputs from the input BNC connectors along the lower right of the front panel. Then, using one of the probes supplied with the digitizing oscilloscope, connect from the CH 1 connector to the PROBE COMPENSATION connectors (see Figure '3).

Figure 1/3:.Connecting a Probe for the Examples

TDS 62 A 64 A 644A User Manual

1/7

Example 1: Displaying a Waveform

Resetting the

Digitizing

Oscilloscope

In this first example you learn about resetting the digitizing oscilloscope, displaying and adjusting a waveform, and using the autoset function.

All examples in the tutorial begin by resetting the digitizing oscilloscope to a known factory default state. Reset the oscilloscope when you begin a new task and need to •start fresh" with known default settings.

1.Press the save/recall SETUP button to display the Setup menu (Fig, ure 1,4).

SETUP Button

Figure 1+4:*SETUP Button Location

The digitizing oscilloscope displays main menus along the bottom of the screen. Figure 1,5 shows the Setup main menu.

OK Confirm Factory Init

Menu Item and Button

Recall Factory Setup

Menu Item and Button

Figure 1+5:*The Displayed Setup Menu

1+8	Getting Started

Example 1: Displaying a Waveform

2.Press the button directly below the Recall Factory Setup menu item.

The display shows side menus along the right side of the screen. The buttons to select these side menu items are to the right of the side menu.

Because an accidental instrument reset could destroy a setup that took a long time to create, the digitizing oscilloscope asks you to verify the Recall Factory Setup selection (see Figure 1)5).

3.Press the button to the right of the OK Confirm Factory Init side menu item.

NOTE

This manual uses the following notation to represent the sequence of selections you made in steps 1, 2 and 3: Press save/recall

SETUP Recall Factory Setup (main) OK Confirm Factory Init (side).

Note that a clock icon appears on screen. The oscilloscope displays this icon when performing operations that take longer than several seconds.

4.Press SET LEVEL TO 50% (see Figure 1)6) to be sure the oscilloscope triggers on the input signal.

SET LEVEL TO 50% Bu on

Figure 116:0Trigger Controls

TDS 620A, 640A & 644A User Manual

119

Tektronix TDS 640A, TDS 620A, TDS 644A User Manual

Example 1: Displaying a Waveform

Display Elements	Figure 127 shows the display that results from the instrument reset. There
	are several important points to observe:
	The trigger level bar shows that the waveform is triggered at a level near
	50% of its amplitude (from step 4).
	The trigger position indicator shows that the trigger position of the
	waveform is located at the horizontal center of the graticule.
	The channel reference indicator shows the vertical position of channel 1
	with no input signal. This indicator points to the ground level for the
	channel when its vertical offset is set to 0 V in the vertical menu; when
	vertical offset is not set to 0 V, it points to the vertical offset level.
	The trigger readout shows that the digitizing oscilloscope is triggering on
	channel 1 (Ch1) on a rising edge, and that the trigger level is about
	200-300 mV.
	The time base readout shows that the main time base is set to a horizon2
	tal scale of 5001 s/div.
	The channel readout indicates that channel 1 (Ch1) is displayed with DC
	coupling. ( n AC coupling, ~ appears after the volts/div readout.) The
	digitizing oscilloscope always displays channel 1 at reset.

Trigger Level Bar

Trigger Position Indicator

Channel Reference Indicator

Trigger Readout

Time Base Readout

Channel Readout

Figure 1,7:+The Display After Factory Initialization

Right now, the channel, time base, and trigger readouts appear in the grati2 cule area because a menu is displayed. You can press the CLEAR MENU button at any time to remove any menus and to move the readouts below the graticule.

1,10	Getting Started

Adjusting the

Waveform Display

Example 1: Displaying a Waveform

The display shows the probe compensation signal It is a /kHz square wave of approximately 5/V amplitude You can adjust the size and placement of the waveform using the front0panel knobs

Figure 08 shows the main VERTICAL and HORIZONTAL sections of the front panel Each has SCALE and POSITION knobs

Turn the vertical SCALE knob clockwise Observe the change in the displayed waveform and the channel readout at the bottom of the dis0 play

Figure 138:2The VERTICAL and HORIZONTAL Controls

Using Autoset

Turn the vertical POSITION knob first one direction then the other Observe the change in the displayed waveform Then return the wave0 form to the center of the graticule

Turn the horizontal SCALE knob one click clockwise Observe the time base readout at the bottom of the display The time base should be set to 5 / s div now and you should see two complete waveform cycles on the display

When you first connect a signal to a channel and display it the signal dis0 played may not be scaled and triggered correctly Use the autoset function and you should quickly get a meaningful display

When you reset the digitizing oscilloscope you see a clear stable display of the probe compensation waveform That is because the probe compensa0 tion signal happens to display well at the default settings of the digitizing oscilloscope

TDS 62 A 64 A 644A User Manual

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+ 254 hidden pages