Spectrum
analyzer
•Spectrum
analyzer is use for measuring signal in frequency domain.
•It
measure modulation, distortion and noise.
•Spectrum
analyzer measure the electrical
input signal, for measuring other than electrical signal first it is converted
to electrical signal using transducer and fed it to Spectrum analyzer.
•There
are three ways for frequency domain measurements
1. Real time technique
2. Fourier transform analysis
3. Swept tune technique
•So
there are Fast
Fourier Transform and swept tuned based spectrum analyzer.
•Spectrum
analyzer can be use with computer using USB.
•Modern
spectrum analyzer have frequency range from Hz to GHz.
•Modern
spectrum analyzer have three primary control one is frequency control, span per
division control and reference level control.
•The
frequency control customarily determines the center of the swept frequency
range.
•The
span control regulate the width of the frequency.
•Reference
level control produce full screen deflection by varying the level of the
signal.
•Other
control include dynamic range, sweep speed and resolution bandwidth.
