Question

Spectrum analyzer is designed to represent graphically a plot of ____________

1. amplitude vs phase
2. phase vs frequency
3. amplitude vs time
4. amplitude vs frequency

Answer 1

Correct Answer - Option 4 : amplitude vs frequency

Spectrum analyzer:

• Spectrum analyzer is a combination of narrowband superheterodyne​ receiver and CRO.
• A spectrum analyzer is an instrument that displays the spectrum of the input waveform with respect to the frequency on the CRT screen.
• It consists of an internal sweep voltage generator connected to the X-deflecting plate of the CRT.
• It uses a sweep voltage generator to sweep the electron beam as well as the input signal.
• Spectrum analyzer can correctly measure the fundamental frequency component of a waveform and its higher order harmonics.
• It is designed to represent graphically a plot of amplitude vs frequency.