05-07-2012, 11:14 AM
SPECTRUM ANALYZER
spectrum.ppt (Size: 3.37 MB / Downloads: 124)
Introduction
Signal Analysis
Instruments used for signal analysis
Spectrum analyzer:
A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to measure the power of the spectrum of known and unknown signals.
Time and frequency domain analysis
The display of a spectrum analyzer has frequency on the horizontal axis and the amplitude displayed on the vertical axis. To the casual observer, a spectrum analyzer looks like an oscilloscope and, in fact, some lab instruments can function either as an oscilloscope or a spectrum analyzer.
Spectrum Analyzer Types
Swept or Super-heterodyne spectrum analyzers:
Fast Fourier Transform, FFT analyzers:
Audio spectrum analyzer: