Fig.1 Showing FM of square wave.

Observe the frequency change in the FM wave. Calculate f

f

Deviation Ratio ( DR ) can be calculated as,

The dominant frequency components which are present in the Fig.2 Frequency Spectrum are tabulated below in Table.1

From the Fig.3 , it is seen that the spectrum has WBFM being generated from the VCO. The THD ( Total Harmonic Distortion ) in percentage is 1.21 & Signal to noise ratio ( in dB ) is 1.38.