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Compare between FM and PM

Compare between FM and PM 
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PARAMETERS
 FM
 PM
1. Variable parameter of carrier.
 Frequency
 Phase
2. Variable parameter proportional to modulating voltage. 
 Frequency deviation
 Phase deviation. 
3. Amplitude of modulated signal.
 Constant
 Constant. 
4. Noise immunity 
 Best of all schemes
 Better than AM
5. Coverage area for transmitted power
 More
 Moderate
6. Signal to noise ratio
 Best
 Better
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