In article , Jianhong Wang wrote:
I am oging to implement a weather band receiver using a DSP chip.
Tunner is available. But i can not find too much information about
weather band. Could any one tell me the modulation method of weather
band and give me some useful link about the detail of weather band.

It's just wideband FM. If you can pick up FM broadcast, you can just
slide that LO up a few MHz and get weather band.
--scott

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"C'est un Nagra. C'est suisse, et tres, tres precis."