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Posted by Paul Martin on 10/27/07 17:29
In article <ujr6i3dolk1qjon2ij5tta8aip26tff9qa@4ax.com>,
John Evans wrote:
> Oh dear - what about the deviation?
> The rule of thumb bandwidth required for FM (Carson's Rule) says the
> bandwidth is given by
> 2x(peak deviation x highest modulating frquency).
> So a system with a maximum modulating sinusoidal frequency of 15khz
> using a deviation of 75khz needs 180khz bandwidth minimum.
> Note a pulse would require a far greater bandwidth.
Depends on the type of pulse. A wavelet might be about the same.
--
Paul Martin <pm@zetnet.net>
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