Leader LBO - 524 User Manual

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Leader LBO - 524 Specifications

General

Model	LBO - 524
Category	Test Equipment
Type	Oscilloscope
Bandwidth	20 MHz
Channels	2
Vertical Sensitivity	5 mV/div to 5 V/div
Time Base	0.2 µs/div to 0.5 s/div
Max Input Voltage	400 V (DC + AC peak)
Display	CRT
Input Impedance	1 MΩ // 25 pF
Power Supply	100-240 VAC, 50/60 Hz

Summary

1. INTRODUCTION

2. SPECIFICATIONS

3. NOTES ON OPERATION

3.1 Power Source Voltage

Guidelines for selecting and applying the correct AC power voltage for safe and proper operation.

3.2 Signal Input Limitations

Specifies the maximum allowable input voltage for vertical and synchronization terminals to prevent damage.

3.3 Magnetic Field Influence

Warns about operating in strong magnetic fields and potential waveform distortion.

3.4 Operating Environment Limits

Details operational limits for temperature and humidity to ensure instrument longevity.

3.5 CRT Intensity Management

Advises on managing CRT intensity to prevent screen damage and ensure clarity.

3.6 Trans-less Equipment Connection Safety

Provides safety precautions and methods for connecting to equipment without a transformer.

4. DESCRIPTION ON PANEL

4.1 General Appearance and Handling

Details external features like hand carrier, legs, and power cord for user convenience.

4.2 Display Block Controls

Explains controls for the CRT display, including illumination, focus, and brightness.

4.3 Vertical Block Controls

Describes controls for the vertical amplifiers, including position, sensitivity, and polarity.

4.4 Synchronizing Block Controls

Details controls for setting up synchronization signals, including slope, level, and source.

4.5 Sweep Block Controls

Explains controls for managing sweep operations, including time base and delay time settings.

4.6 Rear Panel Connections

Describes the connectors and terminals located on the rear panel of the oscilloscope.

5. BASIC OPERATIONS

5.1 Display Trace Line Setup

Guides on initial settings and power-up procedure to display a basic trace line.

5.2 Gain Calibration Procedure

Explains how to use the calibration waveform to check vertical gain and time axis.

5.3 Low-Capacitance Probe Usage

Details specifications and operation of the X1/X10 probe for accurate measurements.

5.4 Probe Connection & Grounding

Provides guidance on proper probe connection, grounding, and notes for low-capacity probes.

5.5 Dual Trace Measurement Modes

Explains ALT and CHOP modes for displaying two waveforms simultaneously.

5.7 Waveform Synchronization Setup

Covers methods and settings for achieving stable waveform synchronization for accurate display.

6. MEASUREMENTS

6.1 AC Peak Voltage Measurement

Describes methods for measuring AC voltage component using lead wires or X10 probes.

6.2 DC Voltage Measurement

Details the procedure for measuring DC voltage using AUTO sweep and AC/GND/DC switch.

6.3 DC + AC Peak Voltage Measurement

Explains how to measure the combined DC and AC voltage components of a signal.

6.4 Time Interval Measurement

Provides the formula and procedure for calculating time intervals using sweep speed and screen divisions.

6.5 Frequency Measurement

Explains how to calculate frequency by measuring the period of a waveform.

6.6 Pulse Rise Time Measurement

Details methods for measuring pulse rise time using A sweep and B sweep.

6.7 Phase Difference (Two Signals)

Guides on measuring phase difference between two signals using dual trace.

6.8 Phase Difference (X-Y Operation)

Explains how to measure phase difference using Lissajous figures via X-Y mode.

6.9 Intensity Modulation (Z Axis)

Describes how to use the Z-axis input for intensity modulation of the CRT trace.

7. USER MAINTENANCE & CALIBRATION

8. SPECIALIST MAINTENANCE & CALIBRATION

8.1 Component & Adjuster Layouts

Illustrates the layout of main components and adjustment potentiometers on various PC boards.

8.2 Main Adjuster Procedures

Provides step-by-step instructions for adjusting key parameters like vertical gain, DC balance, and time axis.