# Interpreting frequency domain signal spectrum to time domain

A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the voltage level of signals in volts vertically and frequency horizontally. The spectrum of the unknown signal creates the following display:

A vertical line at a frequency of 50 kHz with a magnitude of 1.80 V

A vertical line at a frequency of 100 kHz with a magnitude of 1.272 V

A vertical line at a frequency of 150 kHz with a magnitude of 0.60 V

and additional vertical lines at 200 kHz and 250 kHz with power levels below that at 150 kHz.

a. What is the magnitude and type of the input waveform?

b. Is the input signal periodic or non-periodic?

c. What is the frequency of the input signal?

https://brainmass.com/engineering/power-engineering/interpreting-frequency-domain-signal-spectrum-time-domain-424279

#### Solution Summary

A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the voltage level of signals in volts vertically and frequency horizontally. The spectrum of the unknown signal creates the following display:

A vertical line at a frequency of 50 kHz with a magnitude of 1.80 V

A vertical line at a frequency of 100 kHz with a magnitude of 1.272 V

A vertical line at a frequency of 150 kHz with a magnitude of 0.60 V

and additional vertical lines at 200 kHz and 250 kHz with power levels below that at 150 kHz.

The following are answered in this context

a. the magnitude and type of the input waveform?

b. the input signal periodic or non-periodic?

c. the frequency of the input signal?