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Hameg HM 203 User Manual

Hameg HM 203
43 pages
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MANUAL
Oscilloscope
HM 2 0 3
M E SST E C H N IK

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Hameg HM 203 Specifications

General IconGeneral
TypeOscilloscope
Bandwidth20 MHz
Channels2
Trigger ModesAuto, Normal, Single
Trigger SourceCH1, CH2, Line, Ext
Max Input Voltage400 V (DC + AC peak)
DisplayCRT
Input Impedance1 MΩ
Power Supply100-240 V AC

Summary

Specifications

Vertical Deflection (Y)

Bandwidth, risetime, deflection coefficients, input impedance, and coupling.

Timebase

Calibrated steps, variable control, accuracy, and magnification.

Trigger System

Modes, slope, sources, coupling, threshold, and bandwidth.

Operating Instructions

Operating Precautions and Safety

Pushbutton usage, instrument protection, intensity limits, safety.

First Time Operation and Safety

Safety Precautions and X-Ray Emission

Isolation transformer, protective conductor, X-ray safety.

Signal Measurement Techniques

Amplitude Measurement Principles

Converting peak-to-peak to RMS values, voltage designations.

Time Measurement Procedures

Waveform Duration Calculation

Multiplying time coefficient by horizontal distance.

Risetime Measurement Techniques

Measuring between 10% and 90% of vertical pulse height.

Triggering and Timebase Synchronization

Trigger and Timebase Verification

Timebase Sweep Checks

Verifying trace length, sweep speed accuracy.

Service Instructions Overview

Case Removal and Servicing Safety

Steps for removing chassis, high voltage hazards during repair.

Instrument Servicing and Troubleshooting

HM 203-4 Block Diagram

Schematics of Key Sections

LV + HV Power Supply Schematic

Circuit diagram for low and high voltage power supply.

Adjusting Advices and Plan

Adjusting Advices and Sequences

Guidance for unblanking pulse, VR3104, sweep rate, and trigger adjustments.

HM 203-4 Adjusting Plan

Diagram showing adjustment points for various controls.

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