hi in fm the frequency of the wave is continiously changing then how is fm frequency measured ? is it the frequency of the carrier wave ?
- posted
18 years ago
frequncy modulation
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- posted
18 years ago
"prad"
** A surprisingly simple and insightful question.The "frequency" of an FM modulated wave = the *average frequency* !!!
There is a fixed carrier frequency that becomes apparent when there is NO modulation - ie silence in a broadcast program. FM modulation shifts this BASE frequency UP & DOWN about the centre frequency.
When averaged over a reasonable time interval ( say one second) the average frequency is the same as the BASE frequency.
....... Phil
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- posted
18 years ago
More on frequency modulation can be found here (classical radio FM):
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and here (for digital signals):
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Regards,
Hans