Tektronix TDS784C, TDS754C, TDS724C, TDS684B, TDS680B Service manual

Service Manual

TDS 500C, TDS 600B & TDS 700C

Digitizing Oscilloscopes

070-9875-04

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 the Safety Summary prior to performing service.

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.

Printed in the U.S.A.

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

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

FlexFormat and KlipChip are trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. 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.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; or c) 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 THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xvi
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xvii
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xviii
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xix
Service Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xix
Service Offerings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xix
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	xxi
Specifications
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±1
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±1
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±2
Signal Acquisition System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±3
Horizontal System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±3
Trigger System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±5
Acquisition Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±5
On-Board User Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±6
Measurement Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±6
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±7
I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±7
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±8
Nominal Traits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±9
Warranted Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±17
Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±25
Operating Information
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±1
Supplying Operating Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±1
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±3
Applying and Interrupting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±4
Repackaging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±5
Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±5
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±7
Screen Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±7
Basic Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2±7

TDS 500C, TDS 600B and TDS 700C Service Manual

i

Table of Contents

Theory of Operation

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±1
Logic Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±1
Module Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3±1
Performance Verification Procedures
Performance Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . .	4±1
Input Channels vs. Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±2
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±2
Brief Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±5
Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±5
Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±7
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±15
Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±15
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±16
TDS 600B Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±19
TDS 500C/700C Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±23
Signal Acquisition System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±27
Time Base System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±43
Trigger System Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±45
Output Signal Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±58
Option 05 Video Trigger Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±67
Sine Wave Generator Leveling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±84
Optical Filters Checks (TDS 500C/TDS 700C Only) . . . . . . . . . . . . . . . . . . . . .	4±87
Adjustment Procedures
Adjustment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±1
Requirements for Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±1
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±2
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±5
Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±6
Probe Adjustment for the P6139A Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±10
Display Assembly Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±21
Maintenance
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±1
Related Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±1
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±2
Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±4
Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . .	6±9
Preparation Ð Please Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±9
Access Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±15
Procedures for External Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±16
Procedures for Outer-Chassis Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±29
Procedures for Inner-Chassis Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±48
Disassembly for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±54
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±59
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±59

ii	TDS 500C, TDS 600B and TDS 700C Service Manual

Table of Contents

Firmware Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±60
Hard Disk Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±61
Options
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±1
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±1
Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±3
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±4

Electrical Parts List

Diagrams

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

Mechanical Parts List

Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±1
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±1
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±2

TDS 500C, TDS 600B and TDS 700C Service Manual

iii

Table of Contents

List of Figures

Figure 2±1: Map of Display Functions . . . . . . . . . . . . . . . . . . . . . . . . .	2±8
Figure 4±1: Map of display functions . . . . . . . . . . . . . . . . . . . . . . . . . .	4±3
Figure 4±2: Verifying adjustments and signal-path compensation . .	4±6
Figure 4±3: Universal test hookup for functional tests ± TDS 600B
shown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±8
Figure 4±4: Measurement of DC offset accuracy at zero setting . . . .	4±29
Figure 4±5: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±30
Figure 4±6: Measurement of DC accuracy at maximum offset and
position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±32
Figure 4±7: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±34
Figure 4±8: Optional initial test hookup . . . . . . . . . . . . . . . . . . . . . . . .	4±34
Figure 4±9: Measurement of analog bandwidth . . . . . . . . . . . . . . . . . .	4±37
Figure 4±10: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±39
Figure 4±11: Measurement of channel delay ± TDS 684B shown . . . .	4±41
Figure 4±12: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±43
Figure 4±13: Measurement of accuracy Ð Long-term and delay time	4±45
Figure 4±14: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±46
Figure 4±15: Measurement of time accuracy for pulse and glitch
triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±48
Figure 4±16: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±49
Figure 4±17: Measurement of trigger-level accuracy . . . . . . . . . . . . .	4±51
Figure 4±18: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±54
Figure 4±19: Measurement of trigger sensitivity Ð 50 MHz results
shown on a TDS 684B screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±55
Figure 4±20: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±58
Figure 4±21: Measurement of main trigger out limits . . . . . . . . . . . . .	4±60
Figure 4±22: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±62
Figure 4±23: Measurement of probe compensator frequency . . . . . . .	4±64
Figure 4±24: Subsequent test hookup . . . . . . . . . . . . . . . . . . . . . . . . . .	4±65
Figure 4±25: Measurement of probe compensator amplitude . . . . . .	4±66
Figure 4±26: Jitter test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±68
Figure 4±27: Jitter test displayed waveform ± TDS 684B shown . . . .	4±69
Figure 4±28: Jitter test when completed ± TDS 684B shown . . . . . . .	4±70
Figure 4±29: Triggered signal range test ± 300 mV . . . . . . . . . . . . . . .	4±72
Figure 4±30: Triggered signal range test ± 75 mV . . . . . . . . . . . . . . . .	4±73

iv	TDS 500C, TDS 600B and TDS 700C Service Manual

Table of Contents

Figure 4±31: 60 Hz Rejection test hookup . . . . . . . . . . . . . . . . . . . . . .	4±74
Figure 4±32: 60 Hz Rejection test setup signal . . . . . . . . . . . . . . . . . . .	4±74
Figure 4±33: Subsequent 60 Hz Rejection test hookup . . . . . . . . . . . .	4±75
Figure 4±34: 60 Hz Rejection test result ± TDS 684B shown . . . . . . .	4±76
Figure 4±35: Line count accuracy test hookup . . . . . . . . . . . . . . . . . . .	4±77
Figure 4±36: Line count accuracy test setup waveform ± TDS 684B
shown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±78
Figure 4±37: Line count accuracy correct result waveform . . . . . . . .	4±79
Figure 4±38: Setup for sync duty cycle test . . . . . . . . . . . . . . . . . . . . . .	4±81
Figure 4±39: Sync duty cycle test: one-div neg pulse waveform . . . . .	4±82
Figure 4±40: Sync duty cycle test: critically adjusted pulse . . . . . . . .	4±83
Figure 4±41: Sine wave generator leveling equipment setup . . . . . . .	4±85
Figure 4±42: Equipment setup for maximum amplitude . . . . . . . . . .	4±86
Figure 4±43: Reference-receiver performance-verification set up . . .	4±89
Figure 4±44: Optical impulse of Ch1 input from OA5022 Optical
Attenuator (OIG501 / OIG502 fed into optical
attenuator in Step 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±91
Figure 4±45: Optical impulse response for OC±12 SONET
Reference Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±94
Figure 4±46: Optical impulse response for OC±12 SONET
Reference Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±95
Figure 5±1: Accessing the protection switch . . . . . . . . . . . . . . . . . . . . .	5±9
Figure 5±2: Hookup for probe compensation . . . . . . . . . . . . . . . . . . . .	5±11
Figure 5±3: Performing probe compensation . . . . . . . . . . . . . . . . . . . .	5±12
Figure 5±4: Proper and improper probe compensation . . . . . . . . . . .	5±12
Figure 5±5: Exposing the Inner Probe Tip . . . . . . . . . . . . . . . . . . . . . .	5±13
Figure 5±6: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±14
Figure 5±7: Exposing the probe body . . . . . . . . . . . . . . . . . . . . . . . . . .	5±16
Figure 5±8: Initial test hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±17
Figure 5±9: Locations of P6139A Probe Adjustments . . . . . . . . . . . . .	5±19
Figure 5±10: Adjustments versus front-corner response . . . . . . . . . . .	5±20
Figure 5±11: Five and Ten Percent Luminance Patches . . . . . . . . . . .	5±22
Figure 6±1: External modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±12
Figure 6±2: Outer-chassis modules . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±13
Figure 6±3: Inner-chassis modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±14
Figure 6±4: Knob removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±17
Figure 6±5: Line fuse and line cord removal . . . . . . . . . . . . . . . . . . . .	6±18
Figure 6±6: Rear cover and cabinet removal . . . . . . . . . . . . . . . . . . . .	6±21

TDS 500C, TDS 600B and TDS 700C Service Manual

v

Table of Contents

Figure 6±7: Front cover, trim ring, menu buttons, and attenuator
panel removal (front cover not shown) . . . . . . . . . . . . . . . . . . . . . .	6±22
Figure 6±8: A12 Front-panel assembly removal . . . . . . . . . . . . . . . . . .	6±24
Figure 6±9: Cabinet modules removal . . . . . . . . . . . . . . . . . . . . . . . . . .	6±27
Figure 6±10: A14 D1 bus and analog-power and digital-power
cables removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±30
Figure 6±11: Remove circuit board assembly from oscilloscope . . . . .	6±31
Figure 6±12: Remove circuit board from assembly . . . . . . . . . . . . . . .	6±32
Figure 6±13: Circuit board installed . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±34
Figure 6±14: Circuit board removal . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±35
Figure 6±15: A11 Processor/display removal . . . . . . . . . . . . . . . . . . . .	6±37
Figure 6±16: Hard disk removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±39
Figure 6±17: Board bracket removal . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±40
Figure 6±18: A10 Acquisition board removal . . . . . . . . . . . . . . . . . . . .	6±43
Figure 6±19: Floppy disk removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±45
Figure 6±20: Rear chassis removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±47
Figure 6±21: A16 Low voltage power supply removal . . . . . . . . . . . . .	6±49
Figure 6±22: Display assembly removal . . . . . . . . . . . . . . . . . . . . . . . .	6±51
Figure 6±23: Display driver board removal . . . . . . . . . . . . . . . . . . . . .	6±52
Figure 6±24: Front subpanel removal . . . . . . . . . . . . . . . . . . . . . . . . . .	6±54
Figure 6±25: Accessing the protection switch . . . . . . . . . . . . . . . . . . . .	6±60
Figure 6±26: Primary troubleshooting procedure . . . . . . . . . . . . . . . .	6±62
Figure 6±27: Module isolation troubleshooting procedure . . . . . . . . .	6±64
Figure 6±28: A16 Low voltage power supply module isolation
troubleshooting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±65
Figure 6±29: Power supply voltage measurement locations . . . . . . . .	6±66
Figure 6±30: Color display troubleshooting procedure . . . . . . . . . . . .	6±67
Figure 6±31: Horizontal and vertical sync signals ± color display . . .	6±68
Figure 6±32: A video signal with white, black, and blanking
levels ± color display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6±68
Figure 6±33: Processor/acquisition troubleshooting procedure . . . . .	6±69
Figure 6±34: Processor/front panel troubleshooting procedure . . . . .	6±70
Figure 6±35: Attenuator/acquisition troubleshooting procedure . . . .	6±71
Figure 6±36: A11 DRAM processor/display module . . . . . . . . . . . . . .	6±72
Figure 6±37: A10 Acquisition module (view of lower right corner) . .	6±73
Figure 9±1: Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9±2
Figure 9±2: Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9±4
Figure 10±1: External modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10±7

vi	TDS 500C, TDS 600B and TDS 700C Service Manual

Table of Contents

Figure 10±2: Outer-chassis modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±9 Figure 10±3: Inner-chassis modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±11 Figure 10±4: Cables, bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±13 Figure 10±5: Cables, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±15 Figure 10±6: Floppy disk drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±17 Figure 10±7: Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±19

TDS 500C, TDS 600B and TDS 700C Service Manual

vii

Table of Contents

List of Tables

Table 1±1: Key features of the TDS 500C, 600B and 700C
oscilloscopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±1
Table 1±2: Record length and divisions per record vs. TDS model . .	1±4
Table 1±3: Nominal traits Ð Signal acquisition system . . . . . . . . . . .	1±9
Table 1±4: Nominal traits Ð Time base system . . . . . . . . . . . . . . . . . .	1±10
Table 1±5: Nominal traits Ð Triggering system . . . . . . . . . . . . . . . . .	1±11
Table 1±6: Nominal traits Ð Display system . . . . . . . . . . . . . . . . . . . .	1±13
Table 1±7: Nominal traits Ð GPIB interface, output ports, and
power fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1±14
Table 1±8: Nominal traits Ð Data handling and reliability . . . . . . . .	1±14
Table 1±9: Nominal traits Ð Mechanical . . . . . . . . . . . . . . . . . . . . . . .	1±15
Table 1±10: Warranted characteristics Ð Signal acquisition system	1±18
Table 1±11: Warranted characteristics Ð Time base system . . . . . . .	1±19
Table 1±12: Warranted characteristics Ð Triggering system . . . . . .	1±20
Table 1±13: Warranted characteristics Ð Output ports, probe
compensator, and power requirements . . . . . . . . . . . . . . . . . . . . .	1±20
Table 1±14: Warranted characteristics Ð Environmental . . . . . . . . .	1±22
Table 1±15: Certifications and compliances . . . . . . . . . . . . . . . . . . . . .	1±24
Table 1±16: Typical characteristics Ð Signal acquisition system . . .	1±25
Table 1±17: Typical characteristics Ð Triggering system . . . . . . . . .	1±28
Table 2±1: Power-cord conductor identification . . . . . . . . . . . . . . . . .	2±2
Table 2±2: Power cord identification . . . . . . . . . . . . . . . . . . . . . . . . . .	2±2
Table 2±3: Effects of corrupted data . . . . . . . . . . . . . . . . . . . . . . . . . .	2±4
Table 4±1: Test equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±16
Table 4±2: DC offset accuracy (zero setting) . . . . . . . . . . . . . . . . . . . .	4±28
Table 4±3: DC Voltage measurement accuracy . . . . . . . . . . . . . . . . . .	4±31
Table 4±4: Analog bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±35
Table 4±5: Delay between channels worksheet . . . . . . . . . . . . . . . . . .	4±42
Table 4±6: Available Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±87
Table 4±7: Reference Receiver Filter Options: . . . . . . . . . . . . . . . . . . .	4±88
Table 4±8: Option 3C and 4C Specifications . . . . . . . . . . . . . . . . . . . .	4±88
Table 4±9: Available receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±88
Table 4±10: Bessel Thompson frequency response and reference
receiver limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4±96

viii	TDS 500C, TDS 600B and TDS 700C Service Manual

Table of Contents

Table 5±1: Calibration Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5±3
Table 5±2: Adjustments Required for Module Replaced . . . . . . . . . .	5±4
Table 5±3: Adjustments and Dependencies . . . . . . . . . . . . . . . . . . . . .	5±4
Table 5±4: Test Equipment, Fixtures, and Supplies . . . . . . . . . . . . . .	5±5
Table 5±5: GPIB Board Configuration1 . . . . . . . . . . . . . . . . . . . . . . . .	5±7
Table 6±1: Relative susceptibility to static-discharge damage . . . . . .	6±3
Table 6±2: External inspection check list . . . . . . . . . . . . . . . . . . . . . . .	6±5
Table 6±3: Internal Inspection Check List . . . . . . . . . . . . . . . . . . . . . .	6±6
Table 6±4: Tools Required for Module Removal . . . . . . . . . . . . . . . . .	6±11
Table 6±5: Normal supply voltages (measured on J26 and J27 on
the A11 DRAM processor/display module) . . . . . . . . . . . . . . . . . .	6±66
Table 6±6: No-load supply voltages (measured on J5 and J6 on
the A17 Main LV power Supply module) . . . . . . . . . . . . . . . . . . . .	6±66
Table 7±1: Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±1
Table 7±2: Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±3
Table 7±3: Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±4
Table 7±4: Accessory software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7±7

TDS 500C, TDS 600B and TDS 700C Service Manual

ix

Table of Contents

x	TDS 500C, TDS 600B and TDS 700C 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. To avoid potential hazards, use this
	product only as specified.
	Only qualified personnel should perform service procedures.
To Avoid Fire or	Use Proper Power Cord. Use only the power cord specified for this product and
Personal Injury	certified for the country of use.
	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.
	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.
	Provide Proper Ventilation. Refer to the manual's installation instructions for
	details on installing the product so it has proper ventilation.

TDS 500C, TDS 600B and TDS 700C Service Manual

xi

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:

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

xii	TDS 500C, TDS 600B and TDS 700C 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 mains power by means of the power cord or, if provided, the power switch.

Use Caution When Servicing the CRT. To avoid electric shock or injury, use extreme caution when handling the CRT. Only qualified personnel familiar with CRT servicing procedures and precautions should remove or install the CRT.

CRTs retain hazardous voltages for long periods of time after power is turned off. Before attempting any servicing, discharge the CRT by shorting the anode to chassis ground. When discharging the CRT, connect the discharge path to ground and then the anode. Rough handling may cause the CRT to implode. Do not nick or scratch the glass or subject it to undue pressure when removing or installing it. When handling the CRT, wear safety goggles and heavy gloves for protection.

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.

X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the high-voltage circuitry or the CRT enclosure. X-ray emissions generated within this product have been sufficiently shielded.

TDS 500C, TDS 600B and TDS 700C Service Manual

xiii

Service Safety Summary

xiv	TDS 500C, TDS 600B and TDS 700C Service Manual

Preface

This preface contains information needed to properly use this manual to service the TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes, as well as general information critical to safe and effective servicing of this oscilloscope.

The following models are covered:

TDS 500C: TDS 520C and TDS 540C

TDS 600B: TDS 620B, TDS 644B, TDS 680B, and TDS 684B

TDS 700C: TDS 724C, TDS 754C, and TDS 784C

Manual Structure

This manual is divided into sections, such as Specification and Theory of Operation. Further, it is divided into subsections, such as Product Description and Removal and Installation Procedures.

Sections containing procedures also contain introductions to those procedures. Be sure to read these introductions because they provide information needed to do the service correctly and efficiently. The following is a brief description of each manual section.

HSpecification contains a product description of the TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes and tables of the characteristics and descriptions that apply to it.

HOperating Information includes general information and operating instructions at the level needed to safely power on and service this oscilloscope. A statement of the service strategy that this manual supports, and instructions for shipment of the digitizing oscilloscopes are found in this section.

HTheory of Operation contains circuit descriptions that support general service and fault isolation.

HPerformance Verification contains a collection of procedures for confirming that these digitizing oscilloscopes function properly and meet warranted limits.

HAdjustment Procedures contains a collection of procedures for adjusting these digitizing oscilloscopes to meet warranted limits.

HMaintenance contains information and procedures for doing preventive and corrective maintenance of these digitizing oscilloscopes. Instructions for

TDS 500C, TDS 600B and TDS 700C Service Manual

xv

Preface

cleaning, for module removal and installation, and for fault isolation to a module are found here.

HOptions contains information on servicing any of the factory-installed options that may be present in your oscilloscope.

HElectrical Parts List contains a statement referring you to Mechanical Replaceable Parts, where both electrical and mechanical modules are listed.

HDiagrams contains a block diagram and an interconnection diagram useful for isolating failed modules.

HMechanical Parts List includes a table of all replaceable modules, their descriptions, and their Tektronix part numbers.

Manual Conventions

This manual uses certain conventions which you should become familiar with before doing service.

Modules Throughout this manual, any replaceable component, assembly, or part of these digitizing oscilloscopes is referred to generically as a module. In general, a module is an assembly, like a circuit board, rather than a component, like a resistor or an integrated circuit. Sometimes a single component is a module; for example, each chassis part of the oscilloscope is a module.

Channels Some TDS models have two auxiliary channels called AUX 1 and AUX 2, instead of CH 3 and CH 4. References to these channels default to CH 3 and CH 4. If your oscilloscope is one of models TDS 520C, TDS 620B, TDS 680B, or TDS 724C, read AUX 1 and AUX 2 respectively for all references to CH 3 and CH 4 in this manual.

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

Symbols Besides the symbols related to safety, this manual uses the following symbols:

STOP. The stop labels information which must be read in order to correctly do service and to avoid incorrectly using or applying service procedures.

The clock icon labels procedure steps which require a pause to wait for the oscilloscope to complete some operation before you can continue.

xvi	TDS 500C, TDS 600B and TDS 700C Service Manual

Preface

Various icons such as the example icon at the left are used in procedures to help identify certain readouts and menu functions on screen.

Related Manuals

The TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes come with the following manuals:

TDS 500C, TDS 600B & 700C User Manual (Tektronix part number 070-9869-XX) contains a tutorial to quickly show you how to operate the

TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes and an in depth discussion of how to more completely use their features. Applications are also discussed.

TDS 500C, TDS 600B & TDS 700C Reference (Tektronix part number 070-9861-XX) contains a brief overview of oscilloscope operation.

TDS Family (500C, 600B, and 700C) Programmer Manual (Tektronix part number 070-9876-XX) contains information for programmed operation via the GPIB interface. Included are the complete command set, setup information, and programming examples.

TDS 500C, TDS 600B & TDS 700C Technical Reference (Tektronix part number 070-9874-XX) contains performance verification procedures and specifications.

TDS 500C, TDS 600B and TDS 700C Service Manual

xvii

Preface

Contacting Tektronix

Product	For application-oriented questions about a Tektronix measure-
Support	ment product, call toll free in North America:
	1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
	6:00 a.m. ± 5:00 p.m. Pacific time
	Or, contact us by e-mail:
	[e-mail]
	For product support outside of North America, contact your
	local Tektronix distributor or sales office.
Service	Contact your local Tektronix distributor or sales office. Or, visit
Support	our web site for a listing of worldwide service locations.
	http://www.tek.com
For other	In North America:
information	1-800-TEK-WIDE (1-800-835-9433)
	An operator will direct your call.
To write us	Tektronix, Inc.
	P.O. Box 1000
	Wilsonville, OR 97070-1000

xviii

TDS 500C, TDS 600B and TDS 700C Service Manual

Introduction

Service Strategy

STOP. Throughout this manual, any field-replaceable component, assembly, or part of this oscilloscope is referred to generically as a module.

This manual contains all the information needed for periodic maintenance of the TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes. (Examples of such information are procedures for checking performance and for readjustment.) Further, it contains all information for corrective maintenance down to the module level. This means that the procedures, diagrams, and other troubleshooting aids help isolate failures to a specific module, rather than to components of that module. Once a failure is isolated, replace the module with a fresh unit obtained from the factory.

All modules are listed in Mechanical Parts List. To isolate a failure to a module, use the fault isolation procedures found in Section 6, Maintenance Information. To remove and replace any failed module, follow the instructions in Removal and

Installation Procedures, also found in Section 6.

Service Offerings

Tektronix provides service to cover repair under warranty as well as other services that may provide a cost-effective answer to your service needs.

Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians, trained on Tektronix products, are best equipped to service your TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes. Tektronix technicians are appraised of the latest information on improvements to the product as well as the latest new options to the product.

Warranty Repair Service Tektronix warrants this product for three years from date of purchase, excluding probes for which the warranty is one year. (The warranty appears after the title page and copyright page in this manual.) Tektronix technicians provide warranty service at most Tektronix service locations worldwide. Your Tektronix product catalog lists all service locations worldwide.

TDS 500C, TDS 600B and TDS 700C Service Manual

xix

Introduction

Repair or Calibration Service

The following services may be purchased to tailor repair and/or calibration of your TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes to fit your requirements.

At-Depot Service. Tektronix offers several standard-priced adjustment (calibration) and repair services:

HA single repair and/or adjustment.

HCalibrations using equipment and procedures that meet the traceability standards specific to the local area.

HAnnual maintenance agreements that provide for either calibration and repair or calibration only of the oscilloscope.

Of these services, the annual maintenance agreement offers a particularly cost-effective approach to service for many owners of the TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes. Such agreements can be purchased to span several years.

On-Site Service. The annual maintenance agreement can be purchased with on-site service, with repair and calibration done at your facility. This service reduces the time your oscilloscope is out of service when calibration or repair is required.

Self Service Tektronix supports repair to the module level by providing Module Exchange and

Module Repair and Return.

Module Exchange. This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones. Tektronix ships you an updated and tested exchange module from the Beaverton, Oregon service center, typically within 24 hours. Each module comes with a 90-day service warranty.

Module Repair and Return. This service returns to you within 10 days the same module that you shipped to Tektronix. The module shipped is repaired, tested, and returned to you from the Beaverton, Oregon service center. It is not updated to match current modules of the same type. Again, each module comes with a 90-day service warranty.

For More Information. Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services just described.

xx	TDS 500C, TDS 600B and TDS 700C Service Manual

Introduction

Before You Begin

This manual is for servicing the TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes. To prevent injury to yourself or damage to the oscilloscope, do the following tasks before you attempt service:

HRead the Safety Summary found at the beginning of this manual.

HRead Service Strategy in this section and Supplying Operating Power in section 2.

When using this manual for servicing, be sure to read and follow all warnings, cautions, and notes.

TDS 500C, TDS 600B and TDS 700C Service Manual

xxi

Introduction

xxii	TDS 500C, TDS 600B and TDS 700C Service Manual

Specifications

This section begins with a general description of the traits of the TDS 500C, TDS 600B, and TDS 700C oscilloscopes. Three sections follow, one for each of three classes of traits: nominal traits, warranted characteristics, and typical characteristics.

Product Description

The TDS 500C, TDS 600B and TDS 700C Digitizing Oscilloscopes are portable, four-channel instruments suitable for use in a variety of test and measurement applications and systems. Table 1±1 lists key features.

Table 1±1: Key features of the TDS 500C, 600B and 700C oscilloscopes

Feature	TDS 600B	TDS 500C & TDS 700C
Digitizing rate,	TDS 684B: 5 GS/s on ea. of 4 ch	TDS 784C: 4 GS/s
maximum	TDS 680B: 5 GS/s on ea. of 2 ch	TDS 540C, 754C: 2 GS/s
	TDS 644B: 2.5 GS/s on ea. of 4 ch	TDS 520C, 724C: 1 GS/s
	TDS 620B: 2.5 GS/s on ea. of 2 ch
Analog bandwidth	TDS 680B, 684B, and 784C: 1 GHz
	TDS 520C, 540C, 620B, 644B, 724C and 754C: 500 MHz
No. of Channels	TDS 644B & 684B: 4	TDS 540C, 754C & 784C: 4
	TDS 620B & 680B: 2 + 21	TDS 520C & 724C: 2 + 21
Record lengths,	15,000 samples	50,000 samples
maximum		(500,000 with option 1M)
		(8,000,000 with option 2M)
Acquisition modes	Sample, envelope, peak detect	Sample, envelope, average,
	and average	high-resolution, and
		peak-detect
Trigger modes	Modes include:
	Edge, logic, and pulse.
	Video trigger, with option 05, modes include:
	NTSC, SECAM, PAL, HDTV, and FlexFormat.
	Communications Trigger with option 2C (available on
	TDS 500C/700C), modes include: AMI, CMI, and NRZ
Display	TDS 520C, 540C, 620B, 680B: Monochrome
	TDS 644B, 684B, 724C, 754C, 784C: Color

TDS 500C, TDS 600B and TDS 700C Service Manual

1±1

Specifications

Table 1±1: Key features of the TDS 500C, 600B and 700C oscilloscopes (cont.)

Feature	TDS 600B	TDS 500C & TDS 700C
Storage	Floppy disk drive:
	1.44 Mbyte, 3.5 inch, DOS 3.3-or-later floppy disk drive
	Internal hard disk drive
	(option HD available on the TDS 500C and 700C)
	170 MByte capacity
	Subject to change due to the fast-moving PC component
	environment.
	NVRAM storage for saving waveforms, hardcopies, and setups
I/O	Full GPIB programmability.
	Hardcopy output using GPIB, RS-232, or Centronics ports

1Two plus Two channel operation allows up to two of the four channels to be displayed simultaneously. Channels not displayed can be used to couple a triggering signal to the oscilloscope.

User Interface

Use a combination of front-panel buttons, knobs, and on-screen menus to control the many functions of the oscilloscope. The front-panel controls are grouped according to function: vertical, horizontal, trigger, and special. Set a function you adjust often, such as vertical positioning or the time base setting, directly by its own front-panel knob. Set a function you change less often, such as vertical coupling or horizontal mode, indirectly using a selected menu.

Menus Pressing one (sometimes two) front-panel button(s), such as vertical menu, displays a main menu of related functions, such as coupling and bandwidth, at the bottom of the screen. Pressing a main-menu button, such as coupling, displays a side menu of settings for that function, such as AC, DC, or GND (ground) coupling, at the right side of the screen. Pressing a side-menu button selects a setting such as DC.

Indicators On-screen readouts help you keep track of the settings for various functions, such as vertical and horizontal scale and trigger level. Some readouts use the cursors or the automatic parameter extraction feature (called measure) to display the results of measurements made or the status of the instrument.

General Purpose Knob Assign the general purpose knob to adjust a selected parameter function. More quickly change parameters by toggling the SHIFT button. Use the same method as for selecting a function, except the final side-menu selection assigns the

1±2	TDS 500C, TDS 600B and TDS 700C Service Manual

Specifications

general purpose knob to adjust some function, such as the position of measurement cursors on screen, or the setting for a channel fine gain.

GUI The user interface also makes use of a GUI, or Graphical User Interface, to make setting functions and interpreting the display more intuitive. Some menus and status are displayed using iconic representations of function settings, such as those shown here for full, 250 MHz and 20 MHz bandwidth. Such icons allow you to more readily determine status or the available settings.

Signal Acquisition System

The signal acquisition system provides four, full-featured vertical channels with calibrated vertical scale factors from 1 mV to 10 V per division. All channels can be acquired simultaneously.

Each of the full-featured channels can be displayed, vertically positioned, and offset, can have their bandwidth limited (250 MHz or 20 MHz) and their vertical coupling specified. Fine gain can also be adjusted.

Besides these channels, up to three math waveforms and four reference waveforms are available for display. (A math waveform results when you specify dual waveform operations, such as add, on any two channels. A reference waveform results when you save a waveform in a reference memory).

Horizontal System

There are three horizontal display modes: main only, main intensified, and delayed only. You can select among various horizontal record length settings.

A feature called ªFit to Screenº allows you to view entire waveform records within the 10 division screen area. Waveforms are compressed to fit on the screen. See Table 1±2.

Both the delayed only display and the intensified zone on the main intensified display may be delayed by time with respect to the main trigger. Both can be set to display immediately after the delay (delayed runs after main mode). The delayed display can also be set to display at the first valid trigger after the delay (delayed-triggerable modes).

The delayed display (or the intensified zone) may also be delayed by a selected number of events. In this case, the events source is the delayed-trigger source. The delayed trigger can also be set to occur after a number of events plus an amount of time.

TDS 500C, TDS 600B and TDS 700C Service Manual

1±3

Specifications

Table 1±2: Record length and divisions per record vs. TDS model

			Divisions per record
	Standard Models	Record length	FTS1 Off2	FTS1 On3
	All TDS 500C, TDS600B & TDS 700C	500	10 divs	10 divs
	All channels4
		1,000	20 divs	10 divs
		2,500	50 divs	10 divs
		5,000	100 divs	10 divs
		15,000	300 divs	10 divs
	TDS 500C & TDS 700C,	50,000	1,000 divs	10 divs
	All channels
			Divisions per record
	Models with Option 1M	Record length	FTS1 Off2	FTS1 On3
	TDS 500C & TDS 700C,	75,000	1,500 divs	10 divs
	All channels
	TDS 500C & TDS 700C,	100,000	2,000 divs	10 divs
	All channels
	TDS 500C & TDS 700C,	130,000	2,600 divs	10 divs
	All channels
		250,000	5,000 divs	10 divs
		500,000	10,000 divs	10 divs
			Divisions per record
	Models with Option 2M	Record length	FTS1 Off2	FTS1 On3
	TDS 520C & TDS 724C	2,000,000	40, 000 divs	10 divs
	One or two channels
	TDS 540C, TDS 784C & TDS 754C
	Three or four channels
	TDS 520C & TDS 724C	4,000,000	80,000 divs	10 divs
	One channel only
	TDS 540C, TDS 784C & TDS 754C
	Two channels
	TDS 540C, TDS 784C & TDS 754C	8,000,000	160,000 divs	10 divs
	One channel only

1Fit to Screen setting

2Fit to Screen off preserves 50 samples/division in a 1±2±5 sec/division sequence.

3Fit to Screen on lets the samples/division and the sec/division sequence vary.

4All channels means all that may be displayed at one time: four channels for some models, two for others. See Table 1±1 and its footnote on page 1±1.

1±4	TDS 500C, TDS 600B and TDS 700C Service Manual