Main
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WARRANTY
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Table of Contents
Specifications
Operational Information
Theory of Operation
Performance Verification
Adjustment Procedures
Maintenance
Removal and Installation Procedures 69. . . . . . . . . . . . . . . . . . . . . . . . . .
Options Electrical Parts List Diagrams Mechanical Parts LIst
List of Figures
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List of Tables
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General Safety Summary
Injury Precautions
Product Damage Precautions
Safety Terms and Symbols
Certifications and Compliances
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Service Safety Summary
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Preface
Manual Structure
Manual Conventions
Related Manuals
Modules Safety Symbols
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Introduction
Service Strategy
Service Offerings
Warranty Repair Service Repair or Calibration Service
Self Service
Before You Begin
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Specifications
Product Description
User Interface
Signal Acquisition System
Menus
Indicators General Purpose Knob GUI
Horizontal System
Trigger System
Acquisition Control
On-Board User Assistance
Measurement Assistance
Cursor
Help Autoset
Storage
I/O
Measure Digital Signal Processing (DSP)
Display
Zoom
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Nominal Traits
110 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 14: Nominal Traits Time Base System
Table 15: Nominal Traits Triggering System
TDS 684A, TDS 744A, & TDS 784A Service Manual 111
Table 15: Nominal Traits Triggering System (Cont.)
TimeSetup/Hold Violation Trigger
Table 16: Nominal Traits Display System
112 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 17: Nominal Traits GPIB Interface, Output Ports, and Power Fuse
Table 18: Nominal Traits Data Handling and Reliability
TDS 684A, TDS 744A, & TDS 784A Service Manual 113
Table 19: Nominal Traits Mechanical
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Warranted Characteristics
Performance Conditions
116 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 110: Warranted Characteristics Signal Acquisition System
TDS 684A, TDS 744A, & TDS 784A Service Manual 117
Table 110: Warranted Characteristics Signal Acquisition System (Cont.)
Table 111: Warranted Characteristics Time Base System
118 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 112: Warranted Characteristics Triggering System
Table 113: Warranted Characteristics Output Ports, Probe Compensator, and Power Requirements
TDS 684A, TDS 744A, & TDS 784A Service Manual 119
Table 114: Warranted Characteristics Environmental
120 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 114: Warranted Characteristics Environmental (Cont.)
TDS 684A, TDS 744A, & TDS 784A Service Manual 121
Typical Characteristics
122 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 115: Typical Characteristics Signal Acquisition System (Cont.)
TDS 684A, TDS 744A, & TDS 784A Service Manual 123
Table 116: Typical Characteristics Triggering System
124 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 116: Typical Characteristics Triggering System (Cont.)
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Installation
Supplying Operating Power
Power Cord Information
Operating Voltage
Operating Environment
Applying and Interrupting Power
Power On
Memory Backup Power
Operating Temperature
Repackaging Instructions
Power Off
Installed Options
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Operating Instructions
Screen Layout
How to Power On
Basic Procedures
How to Use Help
How to Use the Status Menu
How to Set Functions
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How to Set Complex Functions
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Theory of Operation
Logic Conventions
Module Overview
General Input Signal Path
Tube Assembly
Front Panel
Rear Panel Low Voltage Power Supply
Fan
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Performance Verification Procedures
Conventions
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Brief Procedures
Self Tests
Verify Internal Adjustment, Self Compensation, and Diagnostics
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Functional Tests
Verify All Input Channels
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Verify the Time Base
Verify the Main and Delayed Trigger Systems
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Verify the File System
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Performance Tests
Prerequisites
416 TDS 684A, TDS 744A, & TDS 784A Service Manual
Equipment Required
TDS 684A, TDS 744A, & TDS 784A Service Manual 417
Table 41: Test Equipment (Cont.)
Page
TDS 684A, TDS 744A, & TDS 784A Service Manual 419
TDS 684A Test Record
420 TDS 684A, TDS 744A, & TDS 784A Service Manual
TDS 684A Test Record (Cont.)
TDS 684A, TDS 744A, & TDS 784A Service Manual 421
TDS 684A Test Record (Cont.)
Page
TDS 684A, TDS 744A, & TDS 784A Service Manual 423
TDS 7XXA Test Record
424 TDS 684A, TDS 744A, & TDS 784A Service Manual
TDS 7XXA Test Record (Cont.)
TDS 684A, TDS 744A, & TDS 784A Service Manual 425
TDS 7XXA Test Record (Cont.)
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Signal Acquisition System Checks
Check Offset Accuracy (Zero Setting)
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Check DC Voltage Measurement Accuracy
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Check Analog Bandwidth
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Check Delay Between Channels
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Time Base System Checks
Check Accuracy for Long-Term Sample Rate, Delay Time, and Delta Time Measurements
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Trigger System Checks
Check Accuracy (Time) for Pulse-Glitch or Pulse-Width Triggering
Page
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Check Accuracy, Trigger-Level or Threshold, DC Coupled
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Sensitivity, Edge Trigger, DC Coupled
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Output Signal Checks
Check Outputs CH 3 Main and Delayed Trigger
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Check Probe Compensator Output
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Option 05 Video Trigger Checks
Check Video Trigger
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Adjustment Procedures
Requirements for Performance
Usage
System
Optional Peripherals Test Equipment
Performing the Adjustments
Complete Adjustment Individual Adjustments
Partial Adjustment
Adjustment After Repair
Adjustment Dependencies
Adjustment Procedures
TDS 684A, TDS 744A, & TDS 784A Service Manual 55
Equipment Required
Adjustment Procedures
56 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 54: Test Equipment, Fixtures, and Supplies (Cont.)
Adjustment Instructions
Hardware Installation
Software Installation
Software-Based Adjustments
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Probe Adjustment for the P6139A Probe
Compensate the Probe
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Measure Probe Bandwidth
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Adjust the Probe High Frequency Response
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Display Assembly Adjustment
Rotation, Brightness, and Contrast Adjustment
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Maintenance
Related Maintenance Procedures
Preparation
Preventing ESD
Maintenance
TDS 684A, TDS 744A, & TDS 784A Service Manual 63
Table 61: Relative Susceptibility to Static-Discharge Damage
Inspection and Cleaning
General Care Inspection and Cleaning Procedures
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Removal and Installation Procedures
Preparation Please Read
List of Modules
General Instructions
Summary of Procedures
TDS 684A, TDS 744A, & TDS 784A Service Manual 611
612 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 61: External Modules
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Access Procedure
Procedures for External Modules
Front-Panel Knobs
Line Fuse and Line Cord
EMI Gaskets Rear Cover and Cabinet
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Front Cover, Trim Ring, Menu Buttons, and Attenuator Panel
A12 Front-Panel Assembly
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Display-Frame Assembly
Cabinet Modules
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Procedures for Outer-Chassis Modules
Fan
A14 D1 Bus and Analog-Power and Digital-Power Cables
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A29 Video Trigger Board
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A11 Processor/Display Board
Top Cover and Board Brackets
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Rear-Panel Cables
A10 Acquisition Board
Page
TDS 684A, TDS 744A, & TDS 784A Service Manual 641
Figure 618: A10 Acquisition Board Removal
Floppy Disk
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Rear Chassis
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Procedures for Inner-Chassis Modules
A16 Low Voltage Power Supply
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Front Subpanel
Main Chassis
Disassembly for Cleaning
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Troubleshooting
Diagnostics
Firmware Updates
TDS 684A, TDS 744A, & TDS 784A Service Manual 659
Figure 626: Primary Troubleshooting Procedure
660 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 626: Primary Troubleshooting Procedure (Cont.)
TDS 684A, TDS 744A, & TDS 784A Service Manual 661
Figure 627: Module Isolation Troubleshooting Procedure
662 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 628: A16 Low Voltage Power Supply Module Isolation Troubleshooting Procedure
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664 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 630: Color Display Troubleshooting Procedure
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666 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 633: Processor/Acquisition Troubleshooting Procedure
TDS 684A, TDS 744A, & TDS 784A Service Manual 667
Figure 634: Processor/Front Panel Troubleshooting Procedure
668 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 635: Attenuator/Acquisition Troubleshooting Procedure
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670 TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 636: A11 DRAM Processor/Display Module (View of Right Side)
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Options and Accessories
Options
Options and Accessories
72 TDS 684A, TDS 744A, & TDS 784A Service Manual
Table 71: Options (Cont.)
Standard Accessories
Optional Accessories
Accessory Probes
Accessory Software
Warranty Information Service Assurance
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Diagrams
Symbols
92 TDS 684A, TDS 744A, & TDS 784A Service Manual
A12
Figure 91: Interconnections
A10
A18
TDS 684A, TDS 744A, & TDS 784A Service Manual 93
A30
Figure 91: Interconnections (Cont.)
A32
A31
94 TDS 684A, TDS 744A, & TDS 784A Service Manual
A14
Figure 92: Block Diagram
A17
A12
TDS 684A, TDS 744A, & TDS 784A Service Manual 95
A23
Figure 92: Block Diagram (Cont.)
A30
A32
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Mechanical Parts List
Parts Ordering Information
Module Servicing
Using the Replaceable Parts List
Abbreviations Mfr. Code to Manufacturer Cross Index
TDS 684A, TDS 744A, & TDS 784A Service Manual 103
Manufacturers Cross Index
Mfr. Code Manufacturer Address City, State, Zip Code
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Page
106 TDS 684A, TDS 744A, & TDS 784A Service Manual
Replaceable Parts List
Discontd Qty Name & Description Mfr.
Effective Serial No.
Number Serial No.
TDS 684A, TDS 744A, & TDS 784A Service Manual 107
A12
Figure 101: External Modules
108 TDS 684A, TDS 744A, & TDS 784A Service Manual
Replaceable Parts List
Discontd Qty Name & Description Mfr.
Effective Serial No.
Number Serial No.
TDS 684A, TDS 744A, & TDS 784A Service Manual 109
A14
Figure 102: Outer-Chassis Modules
A11
A10
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1012 TDS 684A, TDS 744A, & TDS 784A Service Manual
Replaceable Parts List
Page
1014 TDS 684A, TDS 744A, & TDS 784A Service Manual
Replaceable Parts List
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1016 TDS 684A, TDS 744A, & TDS 784A Service Manual
Replaceable Parts List
Figure 107: Accessories
TDS 684A, TDS 744A, & TDS 784A Service Manual 1017
Replaceable Parts List
