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Service Manual

TDS 200-Series Digital Real-Time Oscilloscope 071-0492-02

This document supports firmware version 1.00 and above. Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.

www.tektronix.com

Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

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 purchase from an authorized Tektronix distributor. If any such 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. Batteries are excluded from this warranty. 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, shipping charges prepaid, and with a copy of customer proof of purchase. 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 WITH RESPECT TO THE LISTED PRODUCTS 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.

Table of Contents
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product End-of-Life Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v vii ix
ix x x

Specifications
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1­1

Operating Information
Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Extension Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Probe Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Probe Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Probe Attenuation Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Factory Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2­1
2­2 2­3 2­4 2­5 2­6 2­7 2­7 2­7 2­8

Theory of Operation
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Extension Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3­1
3­1 3­2 3­2 3­2 3­2

Performance Verification
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4­1
4­2 4­3

Adjustment Procedures
Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5­1
5­1 5­2

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Table of Contents

Maintenance
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventing ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repackaging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6­1
6­1 6­1 6­2 6­5 6­38 6­48

Options
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7­1

Electrical Parts List
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8­1

Diagrams
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9­1

Replaceable Parts
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10­1
10­1 10­2

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TDS 200 Series Digital Oscilloscope Service Manual

Table of Contents

List of Figures
Figure 2­1: Routing the power cord and security cable . . . . . . . . . . . Figure 2­2: Installing an extension module . . . . . . . . . . . . . . . . . . . . . Figure 3­1: Module-level block diagram (two channel) . . . . . . . . . . . Figure 3­2: Module-level block diagram (four channel) . . . . . . . . . . . Figure 5­1: Service menu enable button . . . . . . . . . . . . . . . . . . . . . . . . Figure 5­2: Adjustment setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­1: Removing the rear feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­2: Installing the rear feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­3: Installing a front-case label . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­4: Installing a new rear-case label . . . . . . . . . . . . . . . . . . . . . Figure 6­5: Removing the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­6: Installing the handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­7: Removing and installing the rear cover . . . . . . . . . . . . . . Figure 6­8: Removing and installing the front feet . . . . . . . . . . . . . . . Figure 6­9: Removing and installing the EMI clips . . . . . . . . . . . . . . . Figure 6­10: Removing the flip stand . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­11: Installing the flip stand . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­12: Line fuse location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­13: Removing the power supply module . . . . . . . . . . . . . . . . Figure 6­14: Installing the power supply module . . . . . . . . . . . . . . . . Figure 6­15: Removing and installing the internal assembly . . . . . . . Figure 6­16: Installing the copper mesh grounding tube . . . . . . . . . . Figure 6­17: Main board removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­18: Main board installation . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6­19: Removing the display module . . . . . . . . . . . . . . . . . . . . . Figure 6­20: Installing the display module . . . . . . . . . . . . . . . . . . . . . . Figure 6­21: Removing the front panel module . . . . . . . . . . . . . . . . . . Figure 6­22: Installing the front panel module . . . . . . . . . . . . . . . . . . Figure 6­23: Removing and installing the keypad . . . . . . . . . . . . . . . . Figure 6­24: Removing the display shield . . . . . . . . . . . . . . . . . . . . . . Figure 6­25: Installing the display shield . . . . . . . . . . . . . . . . . . . . . . . Figure 6­26: Measuring the backlight voltage . . . . . . . . . . . . . . . . . . . Figure 10­1: Exploded diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2­3 2­4 3­3 3­4 5­2 5­3 6­8 6­9 6­10 6­11 6­12 6­13 6­15 6­16 6­17 6­18 6­19 6­20 6­21 6­22 6­24 6­25 6­26 6­27 6­28 6­30 6­31 6­32 6­33 6­35 6­36 6­41 10­7

TDS 200 Series Digital Oscilloscope Service Manual

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Table of Contents

List of Tables
Table 1­1: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1­2: General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 2­1: Factory setup settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 5­1: Required equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 5­2: TDS 210 and TDS 220 Adjustment steps . . . . . . . . . . . . . . Table 5­3: TDS 224 Adjustment steps . . . . . . . . . . . . . . . . . . . . . . . . . Table 6­1: Internal inspection check list . . . . . . . . . . . . . . . . . . . . . . . Table 6­2: List of procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6­3: List of error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10­1: Parts list column descriptions . . . . . . . . . . . . . . . . . . . . . . Table 10­2: Manufacturers cross index . . . . . . . . . . . . . . . . . . . . . . . . Table 10­3: Replaceable parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10­4: Replaceable standard accessories . . . . . . . . . . . . . . . . . . . Table 10­5: Replaceable optional accessories . . . . . . . . . . . . . . . . . . . 1­1 1­5 2­8 5­1 5­5 5­7 6­3 6­7 6­46 10­2 10­3 10­3 10­8 10­8

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TDS 200 Series Digital Oscilloscope Service Manual

General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. 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. Avoid Electric Overload. To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is outside the range specified for that terminal. Avoid Overvoltage. To avoid electric shock or fire hazard, do not apply potential to any terminal, including the common terminal, that varies from ground by more than the maximum rating for that terminal. Avoid Electric Shock. To avoid injury or loss of life, do not connect or disconnect probes or test leads while they are connected to a voltage source. Ground the Product. This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded. Connect the Probe Properly. The probe ground lead is at ground potential. Do not connect the ground lead to an elevated voltage. Do Not Operate Without Covers. To avoid electric shock or fire hazard, do not operate this product with covers or panels removed. Use Proper Fuse. To avoid fire hazard, use only the fuse type and rating specified for this product. Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not operate this product in wet or damp conditions. Do Not Operate in an Explosive Atmosphere. To avoid injury or fire hazard, do not operate this product in an explosive atmosphere.

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 Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

TDS 200 Series Digital Oscilloscope Service Manual

v

General Safety Summary

Symbols and Terms

Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. The following symbols may appear on the product:

DANGER High Voltage

Protective Ground (Earth) Terminal

ATTENTION Refer to Manual

Double Insulated

Certifications and Compliances

Refer to the specifications section for a listing of certifications and compliances that apply to this product.

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TDS 200 Series Digital Oscilloscope Service Manual

Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, disconnect the main power by means of the power cord or, if provided, the power switch. Use Care When Servicing With Power On. Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components. To avoid electric shock, do not touch exposed connections.

TDS 200 Series Digital Oscilloscope Service Manual

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Service Safety Summary

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TDS 200 Series Digital Oscilloscope Service Manual

Preface
The service manual for the TDS 200-Series Digital Real-Time Oscilloscope provides information to troubleshoot and repair the instrument to the module level. Some TDS models have two input channels and an external trigger while other models have four input channels. Most illustrations in this manual show a two channel model. Some parts for the four channel model are slightly different because of the additional channels.

Related Manuals
Additional documentation for the instrument is contained in the related manuals listed below.
Extension module instructions part number 071-0409-XX 071-0483-XX 071-0485-XX 071-0484-XX 071-0482-XX 071-0486-XX 071-0488-XX 071-0491-XX 071-0489-XX 071-0490-XX 071-0487-XX

Language English French German Italian Spanish Portuguese Japanese Korean Simplified Chinese Traditional Chinese Russian

User manual part number 071-0398-XX 071-0400-XX* 071-0402-XX* 071-0401-XX* 071-0399-XX* 071-0403-XX* 071-0405-XX* 071-0408-XX* 071-0406-XX* 071-0407-XX* 071-0404-XX

Programmer manual part number 071-0493-XX

*These manuals contain a language overlay for the front-panel controls.

TDS 200 Series Digital Oscilloscope Service Manual

ix

Preface

Contacting Tektronix

Phone Address

1-800-833-9200* Tektronix, Inc. Department or name (if known) 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA www.tektronix.com 1-800-833-9200, select option 1* 1-800-833-9200, select option 2* Email: [email protected]ktronix.com 1-800-833-9200, select option 3* 1-503-627-2400 6:00 a.m. ­ 5:00 p.m. Pacific time

Web site Sales support Service support Technical support

*

This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices.

Product End-of-Life Handling
Components that Contain Mercury. The cold cathode fluorescent tube located in the liquid crystal display backlight contains trace elements of mercury. When you are ready to reclaim the instrument, you must properly transfer it according to local regulations concerning mercury-containing equipment or ship the instrument to the Tektronix Recycling Operations (RAMS). You can contact Tektronix for the RAMS shipping address and instructions.

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TDS 200 Series Digital Oscilloscope Service Manual

Specifications
All specifications apply to the TDS 200-Series Digital Real-Time Oscilloscope with a P2100 probe with the Attenuation switch set to 10X unless noted otherwise. To meet specifications, two conditions must first be met: H H The instrument must have been operating continuously for twenty minutes within the specified operating temperature. You must perform the Self Cal operation, accessible through the utility menu, if the operating temperature changes by more than 5° C.

All specifications are guaranteed unless noted "typical." Specifications that are marked with the n symbol are checked in the chapter Performance Verification. Table 1­1: Specifications
Acquisition Acquisition Modes Acquisition Rate, typical Single Sequence Sample, Peak detect, and Average Up to 180 waveforms per second, per channel (Sample acquisition mode, no measurements) Acquisition Mode Sample, Peak Detect Average Inputs Input Coupling Input Impedance, DC Coupled, all channela
Input Impedance, DC Coupled, EXT TRIG only

Acquisition Stops After Single acquisition, all channels simultaneously N acquisitions, all channels simultaneously, N is selectable from 4, 16, 64, and 128

DC, AC, or GND 1 MW ±2% in parallel with 20 pF ±3 pF
TDS 210 (B099188 to B119999 & C021679 to C029999) TDS 220 (B065810 to B079999 & C021127 to C029999) 1.2 MW ±5% in parallel with 20 pF ±5 pF All other TDS 210, TDS 220, and TDS 224 1 MW ±5% in parallel with 20 pF ±5 pF

P2100 Probe Attenuation Probe Attenuation Factors

1X, 10X 1X, 10X, 100X, 1000X Maximum Voltage 300 VRMS (420 V peak, duty factor < 50%, pulse width < 100 msec.) 150 VRMS

Maximum Voltage Between Overvoltage Category Signal and Common at CAT I and CAT II input BNC CAT III

For steady-state sinusoidal waveforms, derate at 20 dB/decade above 100 kHz to 13 Vpk at 3 MHz* and above. Also, refer to Overvoltage Category description on page 1­7. * Bandwidth is not valid for the P2100 probe when the switch is set to 1X.

TDS 200 Series Digital Oscilloscope Service Manual

1­1

Specifications

Table 1­1: Specifications (cont.)
Inputs Maximum Voltage Between Overvoltage Category Probe Tip and ground CAT I and CAT II using P2100 connected to input BNC CAT III Maximum Voltage 300 VRMS (500 V peak, duty factor < 35%, pulse width < 100 msec.) 100 VRMS

Derate at 20 dB/decade above 900 kHz to 13 VRMS at 27 MHz* and above. Also, refer to Overvoltage Category description on page 1­7. Time delay between channels, typical Channel-to-Channel Common Mode Rejection, typical 150 ps TDS 210 100:1 at 60 Hz 20:1 at 30 MHz* TDS 220 and TDS 224 100:1 at 60 Hz 20:1 at 50 MHz*

Measured on MATH Ch1 ­ Ch2 waveform, with test signal applied between signal and common of both channels, and with the same VOLTS/DIV and coupling settings on each channel. Also measured on MATH Ch3 ­ Ch4 waveform for the TDS 224. Channel-to-Channel Cross- TDS 210 talk w100:1 at 30 MHz* TDS 220 and TDS 224 w100:1 at 50 MHz*

Measured on one channel, with 8 division test signal applied between signal and common of the other channel, the same VOLTS/DIV and coupling settings on each channel, and 50 W terminators on each channel. Vertical Digitizers VOLTS/DIV Range 8 bit resolution (except when set to 2 mV/div), each channel sampled simultaneously 2 mV/div to 5 V/div at input BNC (Full bandwidth at u5 mV/div to 5 V/div, 20 MHz at 2 mV/dif to 5 mV/div, except in Peak Detect mode full bandwidth at u10 mV/div to 5 V/div [20 MHz at 2 mV/div to 10 mV/div]) 2 mV/div to 200 mV/div, ±2 V > 200 mV/div to 5 V/div, ±50 V TDS 210 TDS 220 and TDS 224 100 MHz* (when vertical scale set to > 5 mV/div)

Position Range n Analog Bandwidth in

Sample and Average modes 60 MHz* (when vertical scale set to > 5 mV/div) at BNC or with P2100 probe, DC Coupled 20 MHz* (when vertical scale set to 5 mV/div) Analog Bandwidth in Peak Detect mode (5 s/div to 5m ms/div), typical Selectable Analog Bandwidth Limit, typical

TDS 210
50 MHz* (when vertical scale set to > 10 mV/div) 20 MHz* (when vertical scale set to 10 mV/div) 20 MHz*

TDS 220 and TDS 224
75 MHz* (when vertical scale set to > 10 mV/div)

Lower Frequency Limit, AC Coupled *

10 Hz at BNC 1 Hz when using a 10X passive probe

Bandwidth is not valid for the P2100 probe when the switch is set to 1X.

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TDS 200 Series Digital Oscilloscope Service Manual

Specifications

Table 1­1: Specifications (cont.)
Vertical Rise Time at BNC, typical Peak Detect Response TDS 210 <5.8 ns TDS 220 and TDS 224 <3.5 ns

Captures 50% or greater amplitude of pulses 10 ns wide (5 s/div to 5 ms/div) in the center 6 vertical divisions. The oscilloscope reverts to Sample mode when the sec/div (Horizontal scale) setting is from 2.5 ms/div to 5 ns/div. The Sample mode can still capture 10 ns glitches. 2 mV/div to 5 mV/div, +4% for Sample or Average acquisition mode 10 mV/div and larger, +3% for Sample or Average acquisition mode

DC Gain Accuracy

Accuracy n DC Measurement Accu- Measurement Type racy, Average Acquisition Average of 16 waveforms with vertical position at zero ±(4% × reading + 0.1 div + 1 mV) and either Mode 2 mV/div or 5 mV/div is selected. ±(3% × reading + 0.1 div + 1 mV) and 10 mV/div or greater is selected. Average of 16 waveforms with vertical position not at zero ±[3% × (reading + vertical position) + 1% of vertical position + 0.2 div] Add 2 mV for settings from 2 mV/div to 200 mV/ div. Add 50 mV for settings from u200 mV/div to 5 V/div. Delta Volts Measurement Delta volts between any two averages of 16 Accuracy, Average Acquisi- waveforms acquired under same setup and ambient tion Mode conditions
P2100 passive probe Bandwidth Attenuation ratio Compensation Range Input resistance Input capacitance Maximum input voltage

3% of reading + 0.05 div

10X position
DC to 100 MHz 10:1 18 pf-35 pf 10 M W ± 2% 14.5 pf-17.5 pf

1X position
DC to 7 MHz 1:1 All oscilloscopes with 1 M W input 1 M W ± 2% 80 pf-110 pf

300 VRMS CAT I or 300 V DC CAT I 300 VRMS CAT II or 300 V DC CAT II 100 VRMS CAT III or 100 V DC CAT III 50 S/s to 1 GS/s
(sin x)/x

150 VRMS CAT I or 150 V DC CAT I 150 VRMS CAT II or 150 V DC CAT II 100 VRMS CAT III or 100 V DC CAT III

Horizontal Sample Rate Range
Waveform Interpolation

Record Length SEC/DIV Range

2500 samples for each channel 5 ns/div to 5 s/div, in a 1, 2.5, 5 sequence

n Sample Rate and Delay ±100 ppm over any 1 ms time interval Time Accuracy

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Specifications

Table 1­1: Specifications (cont.)
Horizontal Delta Time Measurement Accuracy (Full Bandwidth) Conditions Single-shot, Sample mode >16 averages Sample interval = s/div ÷ 250 Position Range Trigger n Trigger Sensitivity, Edge Coupling Trigger Type DC Sensitivity CH 1, CH 2, CH 3 & CH 4 TDS 210 and TDS 220 EXT EXT/5 Trigger Sensitivity, Edge Trigger Type, typical Coupling
AC

Accuracy ±(1 sample interval + 100 ppm × reading + 0.6 ns) ±(1 sample interval + 100 ppm × reading + 0.4 ns) 25 ns/div to 100 ms/div 250 ms/div to 5 s/div

5 ns/div to 10 ns/div (­4 div × s/div) to 20 ms

(­4 div × s/div) to 50 ms (­4 div × s/div) to 50 s

1 div from DC to 10 MHz*, 1.5 div from 10 MHz* to Full 100 mV from DC to 10 MHz*, 150 mV from 10 MHz* to Full 500 mV from DC to 10 MHz*, 750 mV from 10 MHz* to Full

Sensitivity
Same as DC at 50 MHz and above

NOISE REJ HF REJ LF REJ Trigger Level Range Source Internal TDS 210 and TDS 220 EXT EXT/5 Trigger Level Accuracy, typical Source Internal TDS 210 and TDS 220 EXT EXT/5 *

Reduces DC-coupled trigger sensitivity by 2 times for > 10 mV/div to 5 V/div Same as DC-coupled limit from DC to 7 kHz, attenuates signals above 80 kHz Same as the DC-coupled limits for frequencies above 300 kHz, attenuates signals below 300 kHz Range ±8 divisions from center of screen ±1.6 V ±8 V Accuracy ±0.2 div volts/div within ±4 divisions from center screen

Accuracies are for signals having rise and fall times 20 ns

±(6% of setting + 40 mV) ±(6% of setting + 200 mV)

Bandwidth is not valid for the P2100 probe when the switch is set to 1X.

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Specifications

Table 1­1: Specifications (cont.)
Trigger SET LEVEL TO 50%, typical
Default Settings, Video Trigger

Operates with input signals 50 Hz
Trigger mode is Auto and Coupling is AC

Sensitivity, Video Trigger Type, typical

Composite video signal Source Internal TDS 210 and TDS 220 EXT EXT/5 400 mV 2V Range Pk-pk amplitude of 2 divisions

Signal Formats and Field Rates, Video Trigger Type Holdoff Range Measurements Cursors

Supports NTSC, PAL, and SECAM broadcast systems for any field or any line 500 ns to 10 s Voltage difference between cursors (DV) Time difference between cursors (DT) Reciprocal of DT in Hertz (1/DT) Cycle RMS, Mean, Pk ­ Pk, Period, Frequency

Automated Measurements

Table 1­2: General specifications
Display Display Type Display Resolution Display Contrast Backlight Intensity, typical Probe compensator output Output Voltage, typical Frequency, typical Power Source Source Voltage 100 ­ 120 VACRMS "10% from 45 Hz through 440 Hz, CAT II 120 ­ 250 VACRMS "10% from 45 Hz through 66 Hz, CAT II Power Consumption Fuse TDS 210 and TDS 220 Less than 20 W 1 A, T rating, 250 V TDS 224 Less than 25 W 5 V into 1 MW load 1 kHz 5.9 in (152 mm) diagonal liquid crystal 320 horizontal by 240 vertical pixels Adjustable, temperature compensated
60 cd/m2

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Specifications

Table 1­2: General specifications (cont.)
Environmental Temperature Cooling Method Humidity Altitude Random Vibration Operating Nonoperating Convection +40° C or below +41° C to +50° C Operating Nonoperating Operating Nonoperating
Mechanical Shock

0° C to +50° C ­20° C to +60° C 90% relative humidity 60% relative humidity 3,000 m 15,000 m 0.31 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis 2.46 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis
50 g, 11 ms, half sine

Operating Height Width Depth

Mechanical Size 151.4 mm (5.96 in.) 304.8 mm (12 in.) 120.7 mm (4.75 in.) 3.6 kg (8.0 lbs)

Weight (approximate) EC Declaration of Conformity (TDS 210, TDS 220 & TDS 224)

When packaged for domestic shipment

Certifications and compliances Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility*; meets the requirements of FCC Code of Federal Regulations, 47 CFR, Part 15, Subpart B, Class A: CISPR 11 (Class A): Electromagnetic radiated and conducted emissions EN 50082-1 European Community Requirements: IEC 61000-4-2 electrostatic discharge IEC 61000-4-3 radiated susceptibility** IEC 61000-4-4 power line fast transients IEC 61000-4-5 power line surge immunity IEC 61000-4-6 conducted immunity to RF fields IEC 61000-4-11 voltage dips, interrupts and variations AS/NZS 2064, Australian emissions standard for Industrial, Scientific, and Medical Equipment (TDS 210, TDS 220, TDS 224, P2100) (P2100) * Low Voltage Directive 73/23/EEC as amended by 93/68/EED: EN61010-1/A2:1995 Safety requirements for electrical equipment for measurement control, and laboratory use EN 61010-2-031:1994 Particular requirements for hand-held probe assemblies for electrical measurement and test

Instrument tested with shielded cables. 200 MHz and up to 2 divisions of trace noise increase over the range of 200 MHz to 1000 MHz under a 3 V/m RF field. Ambient RF fields may induce triggering when trigger threshold is offset less than 2.5 major divisions from ground reference.

** Meets Performance Criterion A with allowed degradation of up to 5 major divisions of trace noise increase from 80 MHz to

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Specifications

Table 1­2: General specifications (cont.)
Certifications and compliances Certifications (TDS 210, TDS 220, TDS 224) (P2100) CAN/CSA C22.2 No. 1010.1-92 UL3111-1, First Edition IEC61010-1/A2 IEC61010-2-031

CSA Certified Power Cords CSA Certification includes the products and power cords appropriate for use in the North America power network. All other power cords supplied are approved for the country of use. Pollution Degree 2 Overvoltage Category Do not operate in environments where conductive pollutants may be present. Category: CAT III CAT II CAT I Adjustment interval The recommended adjustment interval is one year Examples of Products in this Category: Distribution-level mains, fixed installation Local-level mains, appliances, portable equipment Signal levels in special equipment or parts of equipment, telecommunications, electronics

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Specifications

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TDS 200 Series Digital Oscilloscope Service Manual

Operating Information
TDS 200-Series Digital Oscilloscopes are two or four channel oscilloscopes in small, lightweight, benchtop packages that you can use to take ground-referenced measurements. In addition to the list of general features, this chapter covers the following topics: H H H H H H How to install your product How to add extended functions How to perform a brief functional check How to compensate probes How to use the self calibration routine How to match your probe attenuation factor

For more detailed information about instrument operation, refer to your user manual.

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Operating Information

General Features
H H H H H H H H H H H H H H 100 MHz (TDS 220 and TDS 224) or 60 MHz (TDS 210) bandwidth with selectable 20 MHz bandwidth limit 1 GS/s sample rate and 2,500 point record length for each channel Cursors with readout Five automated measurements High-resolution, high-contrast LCD display with temperature compensation and replaceable backlight Setup and waveform storage Autoset for quick setup Waveform averaging and peak detection Digital real-time oscilloscope (at least ten-times over sampling) Dual time base Video trigger capability RS-232, GPIB, and Centronics communication ports easily added with optional extension modules Variable persistence display User interface available in ten user selectable languages

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Operating Information

Installation
Power Cord
Use only power cords designed for your oscilloscope. Use a power source that delivers 85 to 275 VACRMS, 47 to 63 Hz. Refer to page 10­9 for a list of available power cords. Use the power cord notch to help route the cord to the rear of the instrument and avoid inadvertently disconnecting the power source.

Power cord notch

Securing cable

Figure 2­1: Routing the power cord and security cable

Security Loop

Use the built-in cable channels to secure both your instrument and extension module to your location.

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Operating Information

Extension Modules
You can increase the feature set of your oscilloscope by inserting an extension module. Refer to page 10­9 for information about the available modules. Figure 2­2 shows the proper way to install a module without bending the connecting pins. CAUTION. Electrostatic discharge (ESD) can damage components in the extension module and the oscilloscope. Do not operate your instrument with the extension module connector exposed.

1 2

Figure 2­2: Installing an extension module

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Operating Information

Functional Check
Perform this quick functional check to verify that your instrument is operating correctly.
ON/OFF button

1. Turn on the instrument.

Wait until the display shows that all self tests passed. Push the SAVE/RECALL button, select Setups in the top menu box and push the Recall Factory menu box. The default Probe menu attenuation setting is 10X.
PASSED

PROBE COMP

2. Set the switch to 10X on the P2100 probe and connect the oscilloscope probe to

channel 1. To do this, align the slot in the probe connector with the key on the CH 1 BNC, push to connect, and twist to the right to lock the probe in place. Attach the probe tip and reference lead to the PROBE COMP connectors.
CH 1

3. Push the AUTOSET button. Within a few seconds, you should see a square

wave in the display (approximately 5 V at 1 kHz peak-to-peak). Push the CH 1 MENU button twice to turn off channel 1, push the CH 2 MENU button to turn on channel 2, repeat steps 2 and 3. For TDS 224, repeat for CH 3 and CH 4.

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Operating Information

Probe Compensation
Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a probe for the first time to any input channel.
PROBE COMP AUTOSE T button

1. Set the Probe menu attenuation to 10X. Set the switch to 10X on the P2100

probe and connect the oscilloscope probe to channel 1. Attach the probe tip and reference lead to the PROBE COMP connectors and then press AUTOSET. If using the probe hook-tip, ensure a proper connection by firmly twisting the tip onto the probe.

CH 1

2. Check the shape of the displayed waveform.
Overcompensated

Undercompensated

Compensated correctly

3. If necessary, adjust your probe.

Repeat as necessary.

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Operating Information

Self Calibration
The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine at anytime but you should always run the routine if the ambient temperature changes by 5_ C or more. To compensate the signal path, disconnect any probes or cables from the channel input connectors. Then, press the UTILITY button and select Do Self Cal to confirm that you are ready to proceed.

Probe Safety
A guard around the probe body provides a finger barrier for protection from electric shock.

Finger guard

WARNING. To avoid electric shock when using the probe, keep fingers behind the guard on the probe body. To avoid electric shock while using the probe, do not touch metallic portions of the probe head while it is connected to a voltage source. Connect the probe to the instrument and connect the ground terminal to ground before you take any measurements.

Probe Attenuation Setting
Probes are available with various attenuation factors which affect the vertical scale readout of the oscilloscope. To change (or check) the probe attenuation setting, press the VERTICAL MENU button (of the channel you're using) and then press the menu selection next to Probe until the correct setting is displayed. This setting remains in effect until changed again.

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Operating Information

NOTE. The default Probe menu attenuation setting is 10X when the oscilloscope is shipped. Be sure that the Attenuation switch on the P2100 probe is set to match the Probe menu selection in the oscilloscope. The probe switch settings are 1X and 10X.

Attenuation switch

NOTE. When the Attenuation switch is set to 1X, the P2100 probe limits the bandwidth of the oscilloscope to 7 MHz. To use the full bandwidth of the oscilloscope, be sure to set the switch to 10X.

Factory Setup
The table below lists the state of the instrument after you select Recall Factory from the SAVE/RECALL menu.
Table 2­1: Factory setup settings Control
Acquire mode Acquire # of averages Channel selection Cursor H Bar position Cursor V Bar position Cursor function Cursor time units Delayed time base time/div Delay time, delayed runs after main Display format Display graticule type Display contrast Display style Display accumulate time Edge trigger coupling

Setting
Sample 16 Channel 1 on ­3.2 divisions from the center ­2 divisions from the center Off Seconds 50 ms/div 50 ms YT Full 50% Vectors 500 ms DC

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Operating Information

Table 2­1: Factory setup settings (cont.) Control
Edge trigger level Edge trigger slope Edge trigger source Horizontal ­ main trigger position Horizontal ­ time base Main time base time/div Math waveform function Saved setups Saved waveforms Trigger holdoff Trigger mode Trigger type Vertical bandwidth (all channels) Vertical coupling (all channels) Vertical position (all channels) Vertical volts/div. (all channels)

Setting
0.0 V Rising Channel 1 50% Main only 500 ms/div CH1 + CH2 No change No change Minimum (500 ns) Auto Edge Full DC 0 div 100 mV/div

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Operating Information

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TDS 200 Series Digital Oscilloscope Service Manual

Theory of Operation
This chapter describes the electrical operation of the TDS 200-Series Digital Real-Time Oscilloscope to the module level. It describes the basic operation of each functional circuit block shown in figures 3­1 and 3­2.

Main Board
The Main board contains a two or four channel acquisition system, trigger system, acquisition/display controller, and system processor. Interfaces are provided for two signal inputs, external trigger input, probe compensation, front panel, LCD display, extension module, and power supply. Acquisition and display functions are implemented in two application specific integrated circuits (ASICs).

Acquisition System

Signals from the CH 1, CH 2, and EXT TRIG, or CH 1, CH 2, CH 3, and CH 4 input connectors pass through attenuators to the acquisition ASIC. The acquisition ASIC contains amplifiers and samplers for each input channel, A/D converter, and trigger logic. The digitized waveform samples are transferred to the display ASIC. Low voltage regulators supply isolated power to the acquisition ASIC. The display system consists of the display ASIC, DRAM memory, and system oscillator. Digitized acquisition samples are processed by the display ASIC and stored into DRAM. The Display ASIC formats the waveform data and generates drive signals for the LCD display. Front panel scanning is also performed by the display ASIC. The processor system consists of the microprocessor and memory. The processor system interprets the front panel controls, programs acquisition and display parameters, computes waveform measurements, and manages the extension module interface. Saved setups, waveforms, and calibration constants are stored in nonvolatile memory. The processor system shares DRAM with the display system. BNC connectors are mounted on the main board for the CH 1, CH 2, and trigger or CH 1, CH 2, CH 3, and CH 4 inputs. The signal inputs are compatible with the P2100 probes supplied. The PROBE COMP and ground terminals are provided for probe adjustment.

Display System

Processor System

Input Signal Interface

Probe Compensation

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Theory of Operation

Power Supply
The power supply module generates low voltage DC, a line trigger signal for the main board, and high voltage AC to power the LCD backlight. The power supply operates over a wide power line voltage and frequency range.

Display Module
The display module consists of a liquid crystal display (LCD), a display driver, and a florescent backlight.

Front Panel
The front panel board holds the encoders and push button contacts that the operator uses to control the instrument. An elastomer mat holds the conductive pads for the push buttons. Circuits on the front panel convert the matrix into serial data which is read by the display ASIC on the main Board.

Extension Modules
Each extension module also contains a GPIB, RS­232, and Centronics parallel printer interface. A ROM on the extension module contains processor instructions to support the communications interfaces. Extension modules interface with the processor system through the extension module port connector.

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Theory of Operation

Power Supply
AC Line 3 AC Line In

P3 Backlight Power DC Out & Line Trigger 2

GND

Front Panel

J602

A1 Main
GND

7

P53 5

J603

J131 DC In

P131 J90 1

Display
Backlight

J604 Probe Comp Signal J605 Probe Comp GND J51 CH1 J601 5 0 J1 J202 LCD 12 J902 Display Control

Extension Module
J2 9 RS232

J52 CH2

24 J4 J53 EXT TRIG 25 J3

GPIB

CENTRONICS

Figure 3­1: Module-level block diagram (two channel)

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Theory of Operation

Power Supply
AC Line 3 AC Line In

P3 Backlight Power DC Out & Line Trigger 2

GND

A1 Main Front Panel
J101
GND

7

J131 DC In

P131 J90 1

Display
Backlight

J1 5

J103

J104 Probe Comp Signal J104 Probe Comp GND J200 CH1 LCD

J102 12

J902 Display Control

Extension Module
J690 J1 5 0 J2 9 RS232

J250 CH2

24 J4 J300 25 J3

GPIB

CH3

CENTRONICS

J350 CH4

Figure 3­2: Module-level block diagram (four channel)

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TDS 200 Series Digital Oscilloscope Service Manual

Performance Verification
This chapter contains performance verification procedures for the specifications marked with the n symbol. The following equipment, or a suitable equivalent, is required to complete these procedures.
Minimum requirements 17.5 mV to 7 V, ±0.5% accuracy 50 kHz and 100 MHz, ±3% amplitude accuracy 10 ms period, ±25 ppm accuracy BNC male to BNC male, 36 in (1 m) long BNC male to BNC male, 10 in (25 cm) long

Description DC Voltage Source

Examples Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module (Option 250) Fluke 5500A Multi-product Calibrator with Oscilloscope Calibration Option (Option 5500A-SC) Tektronix part number 012-0482-00 Tektronix part number 012-0208-00 Tektronix part number 011-0049-01 Tektronix part number 103-0090-00

Leveled Sine Wave Generator

Time Mark Generator 50 W BNC Cable 50 W BNC Cable

50 W Feedthrough Termination BNC male and female connectors Dual Banana to BNC Adapter BNC T Adapter Banana plugs to BNC female

BNC male to dual BNC female Tektronix part number connectors 103-0030-00

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Performance Verification

Test Record
Serial number Procedure performed by Date

Test Self Test

Passed

Failed

Oscilloscope tests Channel 1 DC Gain Accuracy 5 mV/div 200 mV/div 2 V/div Channel 2 DC Gain Accuracy 5 mV/div 200 mV/div 2 V/div Channel 3 DC Gain Accuracy1 5 mV/div 200 mV/div 2 V/div Channel 4 DC Gain Accuracy1 5 mV/div 200 mV/div 2 V/div Channel 1 Bandwidth Channel 2 Bandwidth Channel 3 Bandwidth1 Channel 4 Bandwidth1 Sample Rate and Delay Time Accuracy Channel 1 Edge Trigger Sensitivity Channel 2 Edge Trigger Sensitivity Channel 3 Edge Trigger Sensitivity1 Channel 4 Edge Trigger Sensitivity1 External Edge Trigger Sensitivity1
1

Low limit 33.3 mV 1.351 V 13.51 V 33.3 mV 1.351 V 13.51 V 33.3 mV 1.351 V 13.51 V 33.3 mV 1.351 V 13.51 V 2.12 V 2.12 V 2.12 V 2.12 V ­2 divs Stable trigger Stable trigger Stable trigger Stable trigger Stable trigger

Test result

High limit 36.7 mV 1.449 V 14.49 V 36.7 mV 1.449 V 14.49 V 36.7 mV 1.449 V 14.49 V 36.7 mV 1.449 V 14.49 V -- -- -- -- +2 divs -- -- -- -- --

Channels 3 and 4 are only on four channel instruments, and External Edge trigger is only on two channel instruments.

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Performance Verification Procedures
Before beginning these procedures, two conditions must first be met: H H The instrument must have been operating continuously for twenty minutes within the operating temperature range specified. You must perform the Self Calibration operation described below. If the ambient temperature changes by more than 5° C, you must perform the Self Calibration operation again.

The time required to complete the entire procedure is approximately one hour. WARNING. Some procedures use hazardous voltages. To prevent electrical shock, always set voltage source outputs to 0 V before making or changing any interconnections.

Self Test

This internal procedure is automatically performed every time the instrument is powered on. No test equipment or hookups are required. Verify that no error messages are displayed before continuing with this procedure. The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine at anytime but you should always run the routine if the ambient temperature changes by 5_ C or more. 1. Disconnect any probes or cables from the channel 1 and channel 2 input connectors. 2. Press the UTILITY button and select Do Self Cal to start the routine. The routine takes approximately one minute to complete. 3. Verify that Self calibration passed.

Self Calibration

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Performance Verification

Check DC Gain Accuracy

This test checks the DC gain accuracy of all input channels. 1. Set the DC voltage source output level to 0 V. 2. Set up the instrument using the following steps:
Press menu button SAVE/ RECALL CH 1 ACQUIRE MEASURE Select menu item Recall Factory Probe Average Source Type Select setting -- 1X 16 An unchecked channel Mean

3. As shown below, connect the instrument channel selected in the table to the DC voltage source.
DC voltage source Digitizing oscilloscope

­ +

Dual banana to BNC adapter BNC cable

4. For each VOLTS/DIV setting listed below, perform the following steps: a. Set the DC voltage source output level to the positive voltage listed and then record the mean measurement as Vpos. b. Reverse the polarity of the DC voltage source and then record the mean measurement as Vneg. c. Calculate Vdiff = Vpos ­ Vneg and then compare Vdiff to the accuracy limits in the table.
VOLTS/DIV setting 5 mV/div 200 mV/div 2 V/div DC voltage source output levels +17.5 mV, ­17.5 mV +700 mV, ­700 mV +7.00 V, ­7.00 V Accuracy limits for Vdiff 33.3 mV to 36.7 mV 1.351 V to 1.449 V 13.51 V to 14.49 V

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Performance Verification

5. Set DC voltage source output level to 0 V. 6. Disconnect the test setup. 7. Repeat steps 1 through 6 until all input channels have been checked.

Check Bandwidth

This test checks the bandwidth of all input channels. 1. Set up the instrument using the following steps:
Press menu button SAVE/ RECALL CH 1 ACQUIRE TRIGGER MEASURE Select menu item Recall Factory Probe Average Coupling Source Type Select setting -- 1X 16 Noise Reject An unchecked channel Pk-Pk

2. As shown below, connect the instrument channel selected in the table to the leveled sine wave generator.
Leveled sine wave generator

Digitizing oscilloscope

Output 50 W feedthrough terminator

BNC cable

3. Set the instrument VOLTS/DIV to 500 mV/div. 4. Set the instrument SEC/DIV to 10 ms/div. 5. Set the leveled sine wave generator frequency to 50 kHz. 6. Set the leveled sine wave generator output level so the peak-to-peak measurement is between 2.98 V and 3.02 V. 7. Set the leveled sine wave generator frequency to 60 MHz if you are checking a TDS 210 or to 100 MHz if you are checking a TDS 220 or TDS 224.

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Performance Verification

8. Set the instrument SEC/DIV to 10 ns/div. 9. Check that the peak-to-peak measurement is 2.12 V. 10. Disconnect the test setup. 11. Repeat steps 1 through 10 until all input channels have been checked.

Check Sample Rate and Delay Time Accuracy

This test checks the time base accuracy. 1. Set up the instrument using the following steps:
Press menu button SAVE/ RECALL CH 1 Select menu item Recall Factory Probe Select setting -- 1X

2. Connect the instrument to the time mark generator as shown below.
Time mark generator Digitizing oscilloscope

Output 50 W feedthrough terminator

BNC cable

3. Set the time mark generator period to 10 ms. 4. Set the instrument VOLTS/DIV to 500 mV/div. 5. Set the instrument Main SEC/DIV to 1 ms/div. 6. Press SET LEVEL TO 50%. 7. Use the vertical POSITION control to center the test signal on screen. 8. Change the instrument setup using the following steps:
Press menu button HORIZONTAL Select menu item Window Select setting --

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Performance Verification

9. Set the instrument Window SEC/DIV to 500 ms/div. NOTE. Setting the Window SEC/DIV to a setting slower than the Main SEC/DIV setting resets the main timebase. If this happens, reset the Main SEC/DIV and then the Window SEC/DIV settings. 10. Use the horizontal POSITION control to set the window position to 10.00 ms. 11. Set the instrument Window SEC/DIV to 500 ns/div. 12. Check that the rising edge of the marker crosses the center horizontal graticule line within ±2 divisions of center graticule. NOTE. One division of displacement from graticule center corresponds to a 50 ppm time base error. 13. Disconnect the test setup.

Check Edge Trigger Sensitivity

This test checks the edge trigger sensitivity for all input channels. 1. Set up the instrument using the following steps:
Press menu button SAVE/ RECALL CH 1 TRIGGER ACQUIRE MEASURE Select menu item Recall Factory Probe Mode Sample Source Type Select setting -- 1X Normal -- An unchecked channel Pk-Pk

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Performance Verification

2. As shown below, connect the instrument channel selected in the table to the leveled sine wave generator.
Leveled sine wave generator

Digitizing oscilloscope

Output 50 W feedthrough terminator

BNC cable

3. Set the leveled sine wave generator frequency to 60 MHz if you are checking a TDS 210 or to 100 MHz if you are checking a TDS 220 or TDS 224. 4. Set the instrument VOLTS/DIV to 500 mV/div. 5. Set the instrument SEC/DIV to 10 ns/div. 6. Set the leveled sine wave generator output level to approximately 750 mVp-p so that the measured amplitude is approximately 750 mV. (The measured amplitude can fluctuate around 750 mV.) 7. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and then check that triggering is stable. 8. Change the instrument setup using the following steps:
Press menu button TRIGGER Select menu item Slope Select setting Falling

9. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and then check that triggering is stable. 10. Change the instrument setup using the following steps:
Press menu button TRIGGER Select menu item Slope Select setting Rising

11. Disconnect the test setup. 12. Repeat steps 1 through 11 until all input channels have been checked.

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Check External Edge Trigger Sensitivity

TDS 210 and TDS 220 only: this test checks the edge trigger sensitivity for the external trigger. 1. Set up the instrument using the following steps:
Press menu button SAVE/ RECALL CH 1 TRIGGER Select menu item Recall Factory Probe Source Mode ACQUIRE MEASURE Sample Source Type Select setting -- 1X Ext Normal -- CH1 Pk-Pk

2. Connect the instrument to the leveled sine wave generator as shown below.
Leveled sine wave generator

Digitizing oscilloscope

Output BNC cable BNC T connector

50 W feedthrough terminator BNC cable

3. Set the leveled sine wave generator frequency to 60 MHz if you are checking a TDS 210 or to 100 MHz if you are checking a TDS 220. 4. Set the instrument VOLTS/DIV to 500 mV/div. 5. Set the instrument SEC/DIV to 10 ns/div. 6. Set the leveled sine wave generator output level to approximately 750 mVp-p so that the measured amplitude is approximately 750 mV. (The measured amplitude can fluctuate around 750 mV.) 7. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and then check that triggering is stable.

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Performance Verification

8. Change the instrument setup using the following steps:
Press menu button TRIGGER Select menu item Slope Select setting Falling

9. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and then check that triggering is stable. 10. Change the instrument setup using the following steps:
Press menu button TRIGGER Select menu item Slope Select setting Rising

11. Disconnect the test setup.

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TDS 200 Series Digital Oscilloscope Service Manual

Adjustment Procedures
This chapter contains adjustment procedures for the TDS 200-Series Digital Real-Time Oscilloscope. Only qualified personnel should perform service procedures. Read the Service Safety Summary and the General Safety Summary before performing any service procedures. Also refer to the chapter Operating Information for information about using the TDS 200s. NOTE. The voltage references inside the TDS 200s are very stable over time and should not require routine updates. Before performing any procedure in this chapter, first verify that the instrument does not meet specifications. Refer to the chapter Performance Verification to verify the specifications.

Required Equipment
The following equipment, or a suitable equivalent, is required to complete these procedures. Table 5­1: Required equipment
Description DC Voltage Source Minimum requirements Examples

­20 V to 20 V, ±0.1% accuracy Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module (Option 250) 50 kHz and 100 MHz, ±0.6% amplitude accuracy Fluke 5500A Multi-product Calibrator with Oscilloscope Calibration Option (Option 5500A-SC) Tektronix part number 012-0482-00 Tektronix part number 012-0208-00 Tektronix part number 011-0049-01 Tektronix part number 103-0090-00 Tektronix part number 103-0030-00

Leveled Sinewave Generator

50 W BNC Cable 50 W BNC Cable (two) 50 W Feedthrough Termination Dual Banana to BNC Adapter BNC T

BNC male to BNC male, 36 in (1 m) long BNC male to BNC male, 10 in (25 cm) long BNC male and female connectors Banana plugs to BNC female One male and two female BNC connectors

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Adjustment Procedures

Adjustment Procedure
The adjustment procedure consists of 55 steps. Each step requires an external voltage source for new calibration constants. Before performing the adjustment procedure, you must warm up the instrument for at least ten minutes in an ambient temperature between 20° C and 30° C. Adjustments performed prior to warm-up or outside this temperature range may result in poor performance. If all steps in the procedure are completed successfully, a "Pass" message is displayed and the new calibration constants take affect. If any step fails, the procedure is aborted and the current calibration is not affected. You can choose to abort the procedure at any step by selecting FCAL ABORT without affecting the current calibration. The equipment setups, shown in Figure 5­2, are required to complete the adjustment procedure. Tables 5­2 and 5­3 list the steps in the procedure and the signal requirement for each step.

Enable the Service Menu

You must enable the service menu to perform the adjustment procedure. With the instrument on, insert a narrow object such as a plastic alignment tool into the access hole, shown in Figure 5­1, until you feel the click of the momentary button. Hold this button in and press the front panel UTILITY button.

Access to service menu enable button

Figure 5­1: Service menu enable button A Service menu selection replaces the Language menu selection, giving you access to the service routines. After adjustment is complete, disable the service menu by again holding in the internal momentary button and pressing the front panel UTILITY button.

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TDS 200 Series Digital Oscilloscope Service Manual

Adjustment Procedures

DC voltage setup 1
DC voltage source Two Channel Digitizing oscilloscope Four Channel Digitizing oscilloscope

­ +

Dual banana to BNC adapter

10 inch BNC cables BNC `T' connector 10 inch BNC cable

10 inch BNC cables BNC `T' connector s

10 inch BNC cables

BNC cable BNC cable

BNC `T' connector 10 inch BNC cable

DC voltage setup 2
DC voltage source Digitizing oscilloscope

­ +

Dual banana to BNC adapter

BNC cable

Sinewave generator setup
Leveled sine wave generator Digitizing oscilloscope

Edge setup
Square wave generator Four Channel Digitizing oscilloscope

Output 50 W feedthrough terminator (Table 5­2 and 5­3 list proper channel) BNC cable

Output 50 W feedthrough terminator (Table 5­2 and 5­3 list proper channel) BNC cable

Figure 5­2: Adjustment setups

TDS 200 Series Digital Oscilloscope Service Manual

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Adjustment Procedures

Adjustment Procedure

Use this procedure to load new calibration constants. 1. Turn on the instrument and let it warm up for at least ten minutes. 2. Enable the Service menu as described on Page 5­2. 3. Press the UTILITY button and select Service from the menus. 4. Select FCAL INIT to initiate the factory calibration routine. You are now in step 1 of the procedure. 5. As indicated by Step 1 in Table 5­2 on page 5­5 (TDS 210 and TDS 220) or Table 5­3 on page 5­7 (TDS 224), connect a 0.0 VDC source to the channel inputs. 6. Press FCAL STEP to load the calibration constant for step 1. 7. Follow the screen prompts along with Table 5­2 on page 5­5 (TDS 210 and TDS 220) or Table 5­3 on page 5­7 (TDS 224) for the remainder of the routine, applying the proper signal for each step. NOTE. During some steps, the instrument may appear to be idle for several minutes while it is processing information internally. Please have patience. If any step in the procedure fails, the procedure terminates. Failure will result if an incorrect signal source is connected. If this happens, you must start the procedure over from the beginning. If the procedure completes successfully, a "Pass" message is displayed and the new adjustment takes effect. 8. Compensate the signal path by performing the self calibration routine. Disconnect any probes or cables from the channel input connectors. Then, press the UTILITY button and select Do Self Cal to confirm that you are ready to proceed. 9. Disable the Service menu option.

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TDS 200 Series Digital Oscilloscope Service Manual

Adjustment Procedures

Table 5­2: TDS 210 and TDS 220 Adjustment steps
Step: Firmware Below V 2.00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Step Firmware V 2.00 and Up 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Equipment setup DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 2 DC Voltage 2 DC Voltage 2 DC Voltage 2

Signal source setting 0.0 V ­20.0 V ­2.0 V ­1.6 V ­1.2 V ­0.8 V ­0.4 V ­0.32 V ­0.2 V ­0.16 V ­0.08 V ­0.04 V ­0.03 V ­0.02 V ­0.015 V 0.015 V 0.02 V 0.03 V 0.04 V 0.08 V 0.16 V 0.2 V 0.32 V 0.4 V 0.8 V 1.2 V 1.6 V 2.0 V 20.0 V 0.0 V ­5.0 V ­1.0 V 1.0 V 5.0 V

Input CH1 & CH2

EXT TRIG

TDS 200 Series Digital Oscilloscope Service Manual

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Adjustment Procedures

Table 5­2: TDS 210 and TDS 220 Adjustment steps (cont.)
Step: Firmware Below V 2.00 35 36 37 38 39 40 41 42 43 44 45 None 46 47 48 49 50 51 52 53 54 55 Step Firmware V 2.00 and Up 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Equipment setup Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Edge, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm

Signal source setting 5 kHz, 1 Vp-p 1 MHz, 1 Vp-p 50 kHz, 1 Vp-p 20 MHz, 1 Vp-p TDS 210: 60 MHz, 1 Vp-p TDS 220: 100 MHz, 1 Vp-p 5 kHz, 2.5 Vp-p 1 MHz, 2.5 Vp-p 50 kHz, 2.5 Vp-p 20 MHz, 2.5 Vp-p TDS 210: 60 MHz, 2.5 Vp-p TDS 220: 100 MHz, 2.5 Vp-p TDS 210: 60 MHz, 2.5 Vp-p TDS 220: 100 MHz, 2.5 Vp-p 1 kHz, 0 to ­800 mV 5 kHz, 1 Vp-p 1 MHz, 1 Vp-p 50 kHz, 1 Vp-p 20 MHz, 1 Vp-p TDS 210: 60 MHz, 1 Vp-p TDS 220: 100 MHz, 1 Vp-p 5 kHz, 2.5 Vp-p 1 MHz, 2.5 Vp-p 50 kHz, 2.5 Vp-p 20 MHz, 2.5 Vp-p TDS 210: 60 MHz, 2.5 Vp-p TDS 220: 100 MHz, 2.5 Vp-p

Input CH1

CH2

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TDS 200 Series Digital Oscilloscope Service Manual

Adjustment Procedures

Table 5­3: TDS 224 Adjustment steps
Step 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Equipment setup DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 Signal source setting 0.0 V ­20.0 V ­2.0 V ­1.6 V ­1.2 V ­0.8 V ­0.4 V ­0.32 V ­0.2 V ­0.16 V ­0.08 V ­0.04 V ­0.03 V ­0.02 V ­0.015 V 0.015 V 0.02 V 0.03 V 0.04 V 0.08 V 0.16 V 0.2 V 0.32 V 0.4 V 0.8 V 1.2 V 1.6 V 2.0 V 20.0 V 0.0 V Input CH1, CH2, CH3 & CH4

TDS 200 Series Digital Oscilloscope Service Manual

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Adjustment Procedures

Table 5­3: TDS 224 Adjustment steps (cont.)
Step 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Equipment setup Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Edge, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sinewave Generator, 50 Ohm Sine