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LeCroy Waverunner2 LT374 Series User Manual

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LTXXX2-SM-E
LeCroy Waverunner2 Series
Service Manual
Version D- December 2003
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LeCroy Waverunner2 LT374 Series Specifications

General IconGeneral
Channels4
Vertical Resolution8-bit
Input CouplingAC, DC, GND
Timebase Accuracy±5 ppm
Input Impedance1 MΩ, 50 Ω
Trigger TypesEdge
InterfaceUSB
Display10.4-inch TFT LCD
Input Voltage Range1 MΩ: ±400 Vpk, 50 Ω: ±5 Vpk

Summary

Warranty and Product Support

Warranty

LeCroy warrants oscilloscope products for normal use within specifications for three years.

Product Assistance

Assistance on installation, calibration, and use is available from the Customer Service Center.

Service and Repair Procedures

Service and Repair

Procedures for returning products for maintenance and repair services.

How to Return a Product

Instructions for returning a product, including obtaining a Return Authorization Number (RAN).

General Information Overview

Product Assistance Contacts

Provides contact information for local offices and service centers for product assistance.

Safe Operating Environment

Details operating environment parameters like temperature, humidity, and altitude.

Safety Symbols and Power On

Safety Symbols

Explains various safety symbols and their meanings used in the manual and on the instrument.

Power On Procedure

Describes the procedure for turning on the oscilloscope and the auto-calibration process.

Oscilloscope Specifications

Vertical System Specifications

Details specifications for bandwidth, input impedance, sensitivity, and resolution.

Timebase System Specifications

Specifies timebase ranges, clock accuracy, and interpolator resolution.

Acquisition and Trigger Specifications

Acquisition System Details

Details single shot sample rates and maximum acquisition points per channel.

Acquisition Modes and Processing

Describes acquisition modes and processing features like ERES and Averaging.

Display, Interface, and Output Specs

Color Waveform Display Features

Details display type, resolution, screen saver, trace count, and grid styles.

Interface and Connectivity Options

Lists remote control, GPIB, RS-232-C, Ethernet, floppy drive, and PC card slot interfaces.

General and Environmental Specifications

Environmental and Safety Approvals

Specifies operating conditions, CE, and UL/cUL approvals.

Math and Measure Tools

Lists standard math and measure tools available for signal processing.

Performance Verification Procedures

Introduction to Performance Verification

Introduces procedures for verifying oscilloscope performance and characteristics.

Tested Characteristics List

Lists quantifiable performance limits that are tested.

Test Equipment and Procedures

Test Equipment Requirements

Lists external traceable signal generators and measurement equipment required for tests.

Turn On Sequence

Provides instructions for turning on the oscilloscope and initial checks.

Input Impedance Testing

Channel Input Impedance (DC 1MΩ)

Specifies procedures for testing DC 1MΩ channel input impedance.

Channel Input Impedance (AC 1MΩ)

Details procedures for testing AC 1MΩ channel input impedance.

Leakage Current and Noise Tests

Channel Leakage Current

Details procedures for testing channel leakage current.

RMS Noise Measurement

Details test limits and procedures for RMS noise measurement.

Accuracy and Trigger Level Tests

DC Accuracy Measurement

Introduces the test for DC accuracy of voltage measurements.

Offset Accuracy Measurement

Details the procedure for measuring offset accuracy.

Bandwidth and Trigger Functionality

Bandwidth Measurement Procedure

Details the procedure for measuring bandwidth using a power meter.

Smart Trigger Functionality

Tests trigger on pulse width less than and greater than 10 nsec.

Time Base and Trigger Level Testing

Trigger Level Tests

Explains testing trigger capabilities for edge trigger cases.

Channel Trigger at 0 Division Threshold

Details testing channel trigger at a 0 division threshold with DC coupling.

Maintenance Procedures

Safety and Antistatic Precautions

Highlights safety symbols and precautions for servicing.

Software Update Procedure

Outlines the procedure for updating the instrument's firmware.

Board Exchange and Troubleshooting

Board Exchange Procedures

Outlines procedures for exchanging main and processor boards.

Troubleshooting Flow Charts

Introduces troubleshooting information for qualified personnel.

Specific Troubleshooting Flowcharts

Fan Problem Diagnosis

Flowchart for diagnosing and resolving fan problems.

Power Supply Voltage Issues

Flowchart for diagnosing power supply voltage issues.

Mechanical Parts and Removal Guide

Upper Cover Assembly Removal

Step-by-step instructions for removing the upper cover assembly.

CPU Board Removal

Step-by-step instructions for removing the CPU board.

Component Removal Procedures

Bottom Cover Assembly Removal

Step-by-step instructions for removing the bottom cover assembly.

Power Supply Assembly Removal

Step-by-step instructions for removing the power supply assembly.

Replaceable Parts Lists

Upper Cover Replaceable Parts

Lists replaceable parts for the upper cover assembly.

CPU Board Replaceable Parts

Lists replaceable parts for the CPU board assembly.

Front Panel and Main Board Removal

Main Board Removal

Step-by-step instructions for removing the main board.

Front Panel Assembly Removal

Step-by-step instructions for removing the front panel assembly.

Mechanical Parts Details

H1 Replaceable Parts

Lists replaceable parts for the main frame and side frames.

LCD Assembly Components

Describes the LCD assembly and its replaceable parts.

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