A wave analyzer (also known as a signal analyzer) is an electronic instrument specifically designed to measure the relative amplitudes of single frequency components within a complex or distorted waveform. Mathematically, it operates on the principle of Fourier analysis, isolating specific harmonic terms ( ) to test signal purity and composition. 1. Working Principle
The fundamental working principle of a wave analyzer is that of a frequency-selective voltmeter.
Selectivity: It tunes directly to one specific signal frequency component while strictly rejecting all other frequencies present in the waveform.
Attenuation & Filtering: A complex input signal passes through an adjustable input attenuator to safely step down large voltage spikes. A high-quality filter then isolates the targeted frequency component.
Indication: The isolated frequency’s amplitude is converted via rectifier circuits and indicated on a calibrated voltmeter, cathode-ray oscilloscope (CRO), or digital readout. 2. Main Types of Wave Analyzers
Wave analyzers are primarily categorized based on their frequency ranges and processing mechanisms: Frequency-Selective Wave Analyzer
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