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hi gang,
just a quick clarification please :)
was looking at the Wiki articke on Frequency modulation
http://en.wikipedia.org/wiki/Frequency_modulation
This comment is in the Modulation Index section...
The signal frequency is referring to the applied audio signal doing the modulating isn't it ?
Thats the way I read it when it goes on to say ...
Cheers
Dave
just a quick clarification please :)
was looking at the Wiki articke on Frequency modulation
http://en.wikipedia.org/wiki/Frequency_modulation
This comment is in the Modulation Index section...
Frequency modulation can be classified as narrowband if the change in the carrier frequency is about the same as the signal frequency, or as wideband if the change in the carrier frequency is much higher (modulation index >1) than the signal frequency.
The signal frequency is referring to the applied audio signal doing the modulating isn't it ?
Thats the way I read it when it goes on to say ...
For example, narrowband FM is used for two way radio systems such as Family Radio Service, in which the carrier is allowed to deviate only 2.5 kHz above and below the center frequency with speech signals of no more than 3.5 kHz bandwidth. Wideband FM is used for FM broadcasting, in which music and speech are transmitted with up to 75 kHz deviation from the center frequency and carry audio with up to a 20-kHz bandwidth.
Cheers
Dave