Tektronix TDS7054, TDS7104, TDS7000 Service Manual

Service Manual

TDS7000 Series

Digital Phosphor Oscilloscopes

(TDS7104 & TDS7054)

071-0711-03

This document applies to firmware version 2.3.2 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 one (1) year from the date of shipment. If this product proves defective during its warranty period, Tektronix, at its option, will either repair the defective product without charge for parts and labor, or provide a replacement in exchange for the defective product.

This warranty applies only to products returned to the designated Tektronix depot or the Tektronix authorized representative from which the product was originally purchased. For products returned to other locations, Customer will be assessed an applicable service charge. The preceding limitation shall not apply within the European Economic Area, where products may be returned for warranty service to the nearest designated service depot regardless of the place of purchase.

In order to obtain service under this warranty, Customer must provide the applicable office of Tektronix or its authorized representative with notice 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 or its representative, with shipping charges prepaid. Tektronix or its representative shall pay for the return of the product to Customer. Customer shall be responsible for paying any associated taxes or duties.

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 consumables;

d)to repair 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; or

e)to repair damage or malfunction resulting from failure to perform user maintenance and cleaning at the frequency and as prescribed in the user manual (if applicable).

THE ABOVE WARRANTIES ARE GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xi
Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xiii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xv
Manual Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xv
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xv
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xvi
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xvii
Specifications
Product and Feature Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-1
Acquisition Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-2
Signal Processing Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-2
Display Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-3
Measurement Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-3
Trigger Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-3
Convenience Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-4
Specification Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-5
Operating Information
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-1
Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-1
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-1
Connect the Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-2
Power On the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-4
Powering Off the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-5
Create an Emergency Startup Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-5
Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-6
Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-7
Back Up User Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-7
User Interface Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-7
Front Panel Controls Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-9
Front Panel I/O Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-10
Instrument Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-10
Signal Path Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-10
Using the Online Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-11

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Table of Contents

Theory of Operation

Logic Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-1
Module Overviews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-1
Input Signal Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-1
Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-2
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-3
Low Voltage Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-3
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-3

Performance Verification

Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2

Brief Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-5
Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-5
Verify Internal Adjustment, Self Compensation, and Diagnostics . . . . . . .	4-5
Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-6
Verify All Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-7
Verify the Time Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-10
Verify the A (Main) and B (Delayed) Trigger Systems . . . . . . . . . . . . . . .	4-12
Verify the File System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-13

Performance Tests — Semi-Automated Method . . . . . . . . . . . . . . . . .	4-17
Overview of the Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-19
Initial Instrumentation Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-20
Test Program Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-22
Test Program Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-23

Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-27
Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-27
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-28
TDS7000 Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-30
Signal Acquisition System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-35
Check DC Voltage Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . .	4-35
Check DC Gain Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-39
Check Analog Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-43
Check Delay Between Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-48
Check Channel Isolation (Crosstalk) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-52
Time Base System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-57
Check Long-Term Sample Rate and Delay Time Accuracy and
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-57
Check Delta Time Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . .	4-62
Trigger System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-65
Check Time Accuracy for Pulse, Glitch, Timeout, and
Width Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-65
Check Sensitivity, Edge Trigger, DC Coupled . . . . . . . . . . . . . . . . . . . . . .	4-69
Output Signal Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-74
Check Outputs — CH 3 Signal Out and Aux Trigger Out . . . . . . . . . . . . .	4-74
Check Probe Compensation Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-77
Sine Wave Generator Leveling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-81

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Table of Contents

Adjustment Procedure

Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-1
Adjustment Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-1
Adjustment Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-1
Adjustment Dependencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-1
Adjustment After Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-1
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-2
Overview of the Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-3
Instrumentation Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-4
Adjustment Program Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-9
Adjustment Program Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-10
Maintenance
Preventing ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-1
Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
General Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
Interior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
Exterior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
Flat Panel Display Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-3
Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . .	6-7
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-7
Procedures for External Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-9
Procedures for Outer-Chassis Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-51
Service Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-51
Check for Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-51
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-53
Fault Isolation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-53
PPC and NLX PC Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-58
Firmware Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-62
After Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-63
BIOS Error Messages (Bali NLX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-63
BIOS Error Messages (Radisys NLX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-64
BIOS Beep Codes (Bali NLX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-67
BIOS Beep Codes (Radisys NLX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-68
Dip Switch Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-68
Diagnostic LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-69
Troubleshooting Using Reset Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-71
Update/Restore the NLX Board CMOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-73
Installing an Authorization Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-74
Hard Disk Drive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-75
Repackaging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-77
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-77
Shipping to the Service Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-77
Options
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7-1
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7-2

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Table of Contents

Electrical Parts List

Diagrams

Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8-1
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9-1
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9-1

Mechanical Parts List

Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-1
Module Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-1
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-2
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-2
Mfr. Code to Manufacturer Cross Index . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-2

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Table of Contents

List of Figures

Figure 2-1: Locations of peripheral connectors on rear panel . . . . .	2-3
Figure 2-2: Line fuse and power cord connector locations,
rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-4
Figure 2-3: On/Standby switch location . . . . . . . . . . . . . . . . . . . . . . .	2-5
Figure 4-1: Toolbar and menu bar . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-3
Figure 4-2: Universal test hookup for functional
tests - CH 1 shown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-7
Figure 4-3: Channel button location . . . . . . . . . . . . . . . . . . . . . . . . . .	4-8
Figure 4-4: Setup for time base test . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-10
Figure 4-5: Setup for trigger test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-12
Figure 4-6: Setup for the file system test . . . . . . . . . . . . . . . . . . . . . . .	4-14
Figure 4-7: Initial setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-20
Figure 4-8: Setup to characterize signal source outputs . . . . . . . . . .	4-23
Figure 4-9: Setup to check delay between channels . . . . . . . . . . . . . .	4-24
Figure 4-10: Setup to check delta time accuracy . . . . . . . . . . . . . . . .	4-24
Figure 4-11: Setup to check probe compensation output . . . . . . . . .	4-25
Figure 4-12: Setup to check analog signal output . . . . . . . . . . . . . . .	4-25
Figure 4-13: Setup to check auxiliary output . . . . . . . . . . . . . . . . . . .	4-25
Figure 4-14: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-36
Figure 4-15: Measurement of DC accuracy at maximum
offset and position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-38
Figure 4-16: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-39
Figure 4-17: Measurement of DC gain accuracy . . . . . . . . . . . . . . . .	4-42
Figure 4-18: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-44
Figure 4-19: Optional initial test hookup . . . . . . . . . . . . . . . . . . . . . .	4-44
Figure 4-20: Measurement of analog bandwidth . . . . . . . . . . . . . . . .	4-47
Figure 4-21: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-49
Figure 4-22: Measurement of channel delay . . . . . . . . . . . . . . . . . . .	4-51
Figure 4-23: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-53
Figure 4-24: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-57
Figure 4-25: Measurement of accuracy - long-term and
delay time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-59
Figure 4-26: Initial test hookup for external reference . . . . . . . . . . .	4-60
Figure 4-27: Final test hookup for external reference input . . . . . . .	4-61
Figure 4-28: Delta time accuracy test hookup . . . . . . . . . . . . . . . . . .	4-62

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Figure 4-29: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-66
Figure 4-30: Measurement of time accuracy for pulse and
glitch triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-67
Figure 4-31: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-70
Figure 4-32: Measurement of trigger sensitivity - 50 MHz
results shown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-71
Figure 4-33: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-74
Figure 4-34: Measurement of main trigger out limits . . . . . . . . . . . .	4-76
Figure 4-35: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-77
Figure 4-36: Measurement of probe compensator frequency . . . . . .	4-78
Figure 4-37: Subsequent test hookup . . . . . . . . . . . . . . . . . . . . . . . . .	4-79
Figure 4-38: Measurement of probe compensator amplitude . . . . . .	4-80
Figure 4-39: Sine wave generator leveling equipment setup . . . . . .	4-81
Figure 4-40: Equipment setup for maximum amplitude . . . . . . . . .	4-83
Figure 5-1: Adjustment setup using a separate controller . . . . . . . .	5-4
Figure 5-2: Adjustment setup using the oscilloscope as
the controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-5
Figure 5-3: National Instruments GPIB Interface Properties
dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5-8
Figure 6-1: Line fuse and line cord removal . . . . . . . . . . . . . . . . . . .	6-10
Figure 6-2: Knob removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-11
Figure 6-3: Trim removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-13
Figure 6-4: Bottom cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-14
Figure 6-5: Cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-16
Figure 6-6: Cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-17
Figure 6-7: External modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-18
Figure 6-8: Internal modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-19
Figure 6-9: Front-panel assembly removal . . . . . . . . . . . . . . . . . . . . .	6-21
Figure 6-10: J1 flex cable connector removal . . . . . . . . . . . . . . . . . . .	6-22
Figure 6-11: Front panel board and keyboard removal . . . . . . . . . .	6-23
Figure 6-12: Display removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-25
Figure 6-13: Touch panel and LCD assembly removal . . . . . . . . . . .	6-26
Figure 6-14: Display adaptor board removal . . . . . . . . . . . . . . . . . . .	6-27
Figure 6-15: Cable clip removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-27
Figure 6-16: Power flex circuit removal . . . . . . . . . . . . . . . . . . . . . . .	6-29
Figure 6-17: Floppy disk drive removal . . . . . . . . . . . . . . . . . . . . . . .	6-30
Figure 6-18: Hard disk drive removal . . . . . . . . . . . . . . . . . . . . . . . . .	6-32
Figure 6-19: Removing the hard disk drive from the cartridge . . . .	6-32

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Figure 6-20: CD drive and bracket removal . . . . . . . . . . . . . . . . . . . .	6-34
Figure 6-21: Fan assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-35
Figure 6-22: Front and rear power distribution and PA bus
boards removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-37
Figure 6-23: Low-voltage power supply removal . . . . . . . . . . . . . . . .	6-38
Figure 6-24: NLX battery removal . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-39
Figure 6-25: NLX assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . .	6-42
Figure 6-26: Riser adapter and NLX board removal . . . . . . . . . . . .	6-44
Figure 6-27: Microprocessor removal . . . . . . . . . . . . . . . . . . . . . . . . .	6-46
Figure 6-28: PPC Processor board removal . . . . . . . . . . . . . . . . . . . .	6-48
Figure 6-29: Acquisition circuit board removal . . . . . . . . . . . . . . . . .	6-50
Figure 6-30: Primary troubleshooting tree . . . . . . . . . . . . . . . . . . . . .	6-54
Figure 6-31: Location of power-on and over current LEDs . . . . . . .	6-55
Figure 6-32: Location of debug pins . . . . . . . . . . . . . . . . . . . . . . . . . .	6-56
Figure 6-33: Connectors J1 and J2 . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-57
Figure 6-34: The three PCI busses . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-71
Figure 6-35: PCI and NLX video connectors . . . . . . . . . . . . . . . . . . .	6-72
Figure 6-36: Location of jumpers and reset button . . . . . . . . . . . . . .	6-73
Figure 9-1: TDS7000 series block diagram . . . . . . . . . . . . . . . . . . . . .	9-2
Figure 10-1: External parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-6
Figure 10-2: Front panel and drives . . . . . . . . . . . . . . . . . . . . . . . . . .	10-8
Figure 10-3: Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-11
Figure 10-4: Acquisition assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-12
Figure 10-5: Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10-13

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List of Tables

Table 1-1: TDS7000 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-1
Table 1-2: Channel input and vertical specifications . . . . . . . . . . . .	1-5
Table 1-3: Horizontal and acquisition system specifications . . . . . .	1-10
Table 1-4: Trigger specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-12
Table 1-5: Display specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1-15
Table 1-6: Input/output port specifications . . . . . . . . . . . . . . . . . . . .	1-16
Table 1-7: Data storage specifications . . . . . . . . . . . . . . . . . . . . . . . .	1-18
Table 1-8: Power source specifications . . . . . . . . . . . . . . . . . . . . . . . .	1-18
Table 1-9: Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . .	1-19
Table 1-10: Environmental specifications . . . . . . . . . . . . . . . . . . . . .	1-20
Table 1-11: Certifications and compliances . . . . . . . . . . . . . . . . . . . .	1-21
Table 2-1: Additional accessory connection information . . . . . . . . .	2-2
Table 2-2: Line fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2-4
Table 4-1: Required equipment and materials . . . . . . . . . . . . . . . . .	4-17
Table 4-2: Test sequence overview . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-19
Table 4-3: GPIB devices required by test program . . . . . . . . . . . . .	4-21
Table 4-4: Test equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-28
Table 4-5: DC Voltage measurement accuracy . . . . . . . . . . . . . . . . .	4-37
Table 4-6: Gain accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-41
Table 4-7: Analog bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4-46
Table 4-8: Delay between channels worksheet . . . . . . . . . . . . . . . . .	4-52
Table 4-9: Delta time measurement . . . . . . . . . . . . . . . . . . . . . . . . . .	4-64
Table 5-1: Adjustments required for module replaced . . . . . . . . . . .	5-1
Table 5-2: Required equipment and materials . . . . . . . . . . . . . . . . .	5-2
Table 5-3: GPIB devices required by test program . . . . . . . . . . . . .	5-6
Table 5-4: Renaming the GPIB devices . . . . . . . . . . . . . . . . . . . . . . .	5-8
Table 5-5: Setting the GPIB addresses . . . . . . . . . . . . . . . . . . . . . . . .	5-9
Table 6-1: External inspection check list . . . . . . . . . . . . . . . . . . . . . .	6-3
Table 6-2: Internal inspection check list . . . . . . . . . . . . . . . . . . . . . .	6-4
Table 6-3: Tools required for module removal . . . . . . . . . . . . . . . . .	6-8
Table 6-4: Failure symptoms and possible causes . . . . . . . . . . . . . . .	6-51
Table 6-5: Power supply voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-56

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Table 6-6: Power-on diagnostic tests . . . . . . . . . . . . . . . . . . . . . . . . .	6-59
Table 6-7: Action required for module replaced . . . . . . . . . . . . . . . .	6-63
Table 6-8: BIOS Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-63
Table 6-9: BIOS Error messages (Radisys) . . . . . . . . . . . . . . . . . . . .	6-65
Table 6-10: Beep codes (Bali) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-67
Table 6-11: Beep codes (Radisys) . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-68
Table 6-12: DIP switch functions . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-69
Table 6-13: Diagnostic LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-70
Table 7-1: Standard accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7-2
Table 7-2: Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7-3

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General Safety Summary

To Avoid Fire or Personal Injury

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified.

Only qualified personnel should perform service procedures.

While using this product, you may need to access other parts of the system. Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system.

Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use.

Connect and Disconnect Properly. 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.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product.

Do Not Operate Without Covers. Do not operate this product with covers or panels removed.

Use Proper Fuse. Use only the fuse type and rating specified for this product.

Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.

Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or laser radiation exists.

Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation.

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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:

CAUTION	WARNING	Protective Ground
Refer to Manual	High Voltage	(Earth) Terminal

	Mains Disconnected	Mains Connected	Standby
	OFF (Power)	ON (Power)

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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, switch off the instrument power, then disconnect the power cord from the mains power.

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.

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Service Safety Summary

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Preface

This is the service manual for the TDS7000 Digital Oscilloscope products. Read this preface to learn how this manual is structured, what conventions it uses, and where you can find other information related to servicing this product. Read the Introduction following this preface for safety and other important background information needed before using this manual for servicing this product.

Manual Structure

This manual is divided into chapters, which are made up of related subordinate topics. These topics can be cross referenced as sections.

Be sure to read the introductions to all procedures. These introductions provide important information needed to do the service correctly, safely, and efficiently.

Manual Conventions

This manual uses certain conventions that you should become familiar with before attempting service.

Modules Throughout this manual, any replaceable component, assembly, or part is referred to by the term module. A module is composed of electrical and mechanical assemblies, circuit cards, interconnecting cables, and user-accessible controls.

Replaceable Parts This manual refers to any field-replaceable assembly or mechanical part specifically by its name or generically as a replaceable part. In general, a replaceable part is any circuit board or assembly, such as the hard disk drive, or a mechanical part, such as the I/O port connectors, that is listed in the replaceable parts list of Chapter 10.

Safety Symbols and terms related to safety appear in the Service Safety Summary found at the beginning of this manual.

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Preface

Related Documentation

The oscilloscope, electrical sampling modules and optical sampling modules come with the following manuals:

HCSA7000, TDS7000 & TDS6000 Series User manual. Tektronix part number 071-7010-XX.

HCSA7000, TDS7000 & TDS6000 Series Reference manual. Tektronix part number 020-2404-XX.

HTDS7000 & TLA600 Series Rackmount Kit (Option 1R) Instructions.

Tektronix part number 071-0716-XX.

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Preface

Contacting Tektronix

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

*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.

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Preface

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Specifications

This chapter contains the specifications for the TDS7000 series Digital Phosphor Oscilloscopes. All specifications are guaranteed unless labeled “typical.” Typical specifications are provided for your convenience but are not guaranteed.

Specifications that are marked with the n symbol are checked in chapter four,

Performance Verification.

All specifications apply to all models unless noted otherwise. To meet specifications, the following conditions must be met:

HThe instrument must have been calibrated in an ambient temperature between 20 °C and 30 °C (68 °F and 86 °F).

HThe instrument must be operating within the environmental limits listed in Table 1-10 on page 1-20.

HThe instrument must be powered from a source that meets the specifications listed in Table 1-8 on page 1-18.

HThe instrument must have been operating continuously for at least 20 minutes within the specified operating temperature range.

HYou must perform the Signal Path Compensation procedure after the 20-minute warm-up period, and if the ambient temperature changes more than 5 °C (41 °F), repeat the procedure. See Run the signal-path compensation routine on page 4-6 for instructions to perform this procedure.

Product and Feature Description

Your oscilloscope is shown in Table 1-1.

Table 1- 1: TDS7000 models

	Number of		Maximum sample
Model	channels	Bandwidth	rate (real time)
TDS7054	4	500 MHz	5 GS/s
TDS7104	4	1 GHz	10 GS/s

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Specifications

Acquisition Features Separate Digitizers. Ensure accurate timing measurements with separate digitizers for each channel. Acquisition on multiple channels is always concurrent. The digitizers can also be combined to yield a higher sample rate on a single channel.

Fast Acquisition. Acquire up to 400,000 waveforms per second to see rapidly changing signals or intermittent signal irregularities.

Long Record Lengths. Choose record lengths from 500 points to up to 500,000 points per channel (up 2,000,000 points on a single channel). Extend the maximum record length up to a maximum of 16,000,000 points with memory options.

Peak Detect Acquisition Mode. See pulses as narrow as 400 ps even at the slower time base settings. Peak detect helps you see noise and glitches in your signal.

Acquisition Control. Acquire continuously or set up to capture single shot acquisitions. Enable or disable optional acquisition features such as equivalent time or roll mode. Use Fast Frame acquisition to capture and time stamp many events in a rapid sequence.

Horizontal Delay. Use delay when you want to acquire a signal at a significant time interval after the trigger point. Toggle delay on and off to quickly compare the signal at two different points in time.

Signal Processing Average, Envelope, and Hi Res Acquisition. Use Average acquisition mode to

Features remove uncorrelated noise from your signal. Use Envelope to capture and display the maximum variation of the signal. Use Hi Res to increase vertical resolution for lower bandwidth signals.

Waveform Math. Set up simple math waveforms using the basic arithmetic functions or create more advanced math waveforms using the math expression editor. Waveform expressions can even contain measurement results and other math waveforms.

Spectral Analysis. Display spectral magnitude and phase waveforms based on your time-domain acquisitions. Control the instrument using the traditional spectrum analyzer controls such as span and center frequency.

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Specifications

Display Features Color LCD Display. Identify and differentiate waveforms easily with color coding. Waveforms, readouts, and inputs are color matched to increase productivity and reduce operating errors. Enhance visualization of waveforms with color grading.

Digital Phosphor. A Digital Phosphor Oscilloscope can clearly display intensity modulation in your signals. The instrument automatically overlays subsequent acquisitions and then decays them to simulate the writing and decay of the phosphor in an analog instrument CRT. The feature results in an intensity-graded or color-graded waveform display that shows the information in the intensity modulation.

Fit to Screen. The Digital Phosphor technology performs the compression required to represent all record points on the screen, even at the maximum record length settings.

Zoom. To take advantage of the full resolution of the instrument you can zoom in on a waveform to see the fine details. Both vertical and horizontal zoom functions are available. Zoomed waveforms can be aligned, locked, and automatically scrolled.

Measurement Features Cursors. Use cursors to take simple voltage, time, and frequency measurements.

Automatic Measurements. Choose from a large palette of amplitude, time, and histogram measurements. You can customize the measurements by changing reference levels or by adding measurement gating.

Mask Testing. Option SM only. Provides mask testing for verifying compliance to standards.

Trigger Features Simple and Advanced Trigger Types. Choose simple edge trigger or choose from eight advanced trigger types to help you capture a specific signal fault or event.

Dual Triggers. Use the A (main) trigger system alone or add the B trigger to capture more complex events. You can use the A and B triggers together to set up a delay-by-time or delay-by-events trigger condition.

Comm Triggers. Option SM only. Use comm triggers to trigger on communication signals.

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Specifications

Convenience Features Autoset. Use Autoset to quickly set up the vertical, horizontal, and trigger controls for a usable display. If a standard mask is active (Option SM only), Autoset adjusts the selected waveform to match the mask, if possible.

Touch Screen Interface. You can operate all instrument functions (except the power switch and the touch screen enable/disable switch) from the touch screen interface. If convenient, you can also install a mouse and keyboard to use the interface.

Toolbar or Menu Bar. You can choose a toolbar operating mode that is optimized for use with the touch screen, or a PC-style menu-bar operating mode that is optimized for use with a mouse.

Open Desktop. The instrument is built on a Microsoft Windows software platform; the instrument application program starts automatically when you apply power to the instrument. You can minimize the instrument application and take full advantage of the built-in PC to run other applications. Moving waveform images and data into other applications is as simple as a copy/paste operation.

Dedicated Front Panel Controls. The front panel contains knobs and buttons to provide immediate access to the most common instrument controls. Separate vertical controls are provided for each channel. The same functions are also available through the screen interface.

Data Storage and I/O. The instrument has a removeable hard disk drive, a CD-RW drive, and a floppy disk drive that can be used for storage and retrieval of data. The instrument has GPIB, USB, Centronics, COM, and Ethernet ports for input and output to other devices.

Online Help. The instrument has a complete online help system that covers all its features. The help system is context sensitive; help for the displayed control window is automatically shown if you touch the help button. Graphical aids in the help windows assist you in getting to the information you need. You can also access the help topics through a table of contents or index.

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Specifications

Specification Tables

Table 1- 2: Channel input and vertical specifications

Characteristic	Description
Input channels	Four, all identical
Input coupling	DC, AC, and GND
	Channel input is disconnected from input termination
	when using GND coupling.
Input impedance, DC coupled	1 MΩ ± 0.5% in parallel with 10 pF ( 3 pF)
	50 Ω ±1%; VSWR ≤ 1.3:1 from DC to 500 MHz, ≤ 1.5:1
	from 500 MHz to 1 GHz
Maximum voltage at input BNC	150 VRMS CAT I,
(1 MΩ)	For steady state sinusoidal waveforms, derate at
	20 dB/decade above 200 kHz to 9 VRMS at 3 MHz and
	above
Maximum voltage at input BNC	5 VRMS, with peaks ≤ ±30 V
(50 Ω)
n Delay between channels	≤ 50 ps between any two channels with the same scale
	and coupling settings
n Channel-to-channel crosstalk	≥ 100:1 at 100 MHz, and ≥ 30:1 at the rated bandwidth
	for any two channels with the same scale and coupling
	settings
Digitizers	8-bit resolution, separate digitizers for each channel
	sample simultaneously
Sensitivity range	1 MΩ: 1 mV/div to 10 V/div, in a 1-2-5 sequence
	50 Ω: 1 mV/div to 1 V/div, in a 1-2-5 sequence
	Fine adjustment available with ≥1% resolution

TDS7104 & TDS7054 Service Manual

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Specifications

Table 1- 2: Channel input and vertical specifications (Cont.)

Characteristic	Description
n Analog bandwidth	DC 50 Ω coupling, bandwidth limit set to Full, operating
	ambient ≤30 °C, derated by 2.5 MHz/°C above 30 °C
	SCALE range	Bandwidth
	1 mV/div to 1.99 mV/div	TDS7054: DC to 450 MHz
		TDS7104: DC to 500 MHz
	2 mV/div to 4.98 mV/div	TDS7054: DC to 500 MHz
		TDS7104: DC to 600 MHz
	5 mV/div to 9.95 mV/div	TDS7054: DC to 500 MHz
		TDS7104: DC to 750 MHz
	10 mV/div to 1 V/div	TDS7054: DC to 500 MHz
		TDS7104: DC to 1 GHz
Analog bandwidth limit, typical	Selectable between 20 MHz, 200 MHz, or Full
Lower frequency limit, AC coupled	< 10 Hz for 1 MΩ, reduced by a factor of ten when using
	a 10X probe; <200 kHz for 50 Ω
Calculated rise time, typical	DC 50 Ω coupling, bandwidth limit set to Full
	SCALE range	Rise time
	1 mV/div to 1.99 mV/div	TDS7054: 890 ps
		TDS7104: 800 ps
	2 mV/div to 4.98 mV/div	TDS7054: 800 ps
		TDS7104: 667 ps
	5 mV/div to 9.95 mV/div	TDS7054: 800 ps
		TDS7104: 533 ps
	10 mV/div to 1 V/div	TDS7054: 800 ps
		TDS7104: 400 ps

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Specifications

Table 1- 2: Channel input and vertical specifications (Cont.)

	Characteristic	Description
	Step response settling errors,	Bandwidth limit set to Full
	typical
		SCALE range and step	Settling error at time after
		amplitude	step
		1 mV/div to 100 mV/div,	20 ns: ≤ 0.5%
		with ≤ 2 V step	100 ns: ≤ 0.2%
			20 ms: ≤ 0.1%
		101 mV/div to 1 V/div,	20 ns: ≤ 1.0%
		with ≤ 20 V step	100 ns: ≤ 0.5%
			20 ms: ≤ 0.2%
		1.01 V/div to 10 V/div,	20 ns: ≤ 1.0%
		with ≤ 200 V step	100 ns: ≤ 0.5%
			20 ms: ≤ 0.2%
	Position range	± 5 divisions
	Offset range	SCALE range	Offset range
		1 mV/div to 100 mV/div	±1 V
		101 mV/div to 1 V/div	±10 V
		1.01 V/div to 10 V/div	±100 V
	Offset accuracy	SCALE range	Offset range
		1 mV/div to 100 mV/div	±(0.2% ×| net offset | +
			1.5 mV + 0.1 div ×V/div
			setting)
		101 mV/div to 1 V/div	±(0.25% ×| net offset | +
			15 mV + 0.1 div ×V/div
			setting)
		1.01 V/div to 10 V/div	±(0.25% ×| net offset | +
			150 mV + 0.1 div ×V/div
			setting)
		Net offset is the nominal voltage that must be applied to
		the channel to bring the trace to center screen.
		Net offset = offset -- (position × volts/division) and is
		expressed in volts

TDS7104 & TDS7054 Service Manual

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Specifications

Table 1- 2: Channel input and vertical specifications (Cont.)

Characteristic		Description
DC gain accuracy,		±1% in Sample or Average acquisition mode
DC voltage measurement accuracy		Measurement type	DC accuracy (in volts)
	Sample acquisition mode,	Absolute measurement of	±[(1.0% × | reading -- net
	typical	any waveform point, and	offset | ) + offset accuracy +
		High, Low, Max, and Min	(0.13 div × V/div setting) +
		measurements	0.6 mV]
		Delta voltage measurement	±[(1.0% × | reading | ) +
		between any two points	(0.26 div × V/div setting) +
		acquired under the same	1.2 mV]
		setup and ambient condi-
		tions, and all other auto-
		matic measurements
		Net offset = offset -- (position × volts/division) and is
		expressed in volts
	n Average acquisition	Absolute measurement of	±[(1.0% × | reading -- net
	mode (≥16 averages)	any waveform point, and	offset | ) + offset accuracy
		High, Low, Max, and Min	+(0.06 × V/div)]
		measurements
		Delta voltage measurement	±[(1.0% × | reading | ) +
		between any two points	(0.1 div × V/div setting) +
		acquired under the same	0.3 mV]
		setup and ambient condi-
		tions, and all other auto-
		matic measurements
		Net offset = offset -- (position × volts/division) and is
		expressed in volts
Nonlinearity, typical		< 1 LSB differential, < 1 LSB integral, independently
		based

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