Yes, it is possible to mix down a 100MHz RF signal to an I/Q signal in the audio range. However, it is not possible to receive broadcast FM radio with 96kHz sampling rate because the FM deviation of such signals is too big, about +/-75 kHz. It wouldn't work even if your soundcard had an input bandwidth of 150kHz because of the modulation sidebands that extend further than that (and contain information). FM sidebands can be calculated using the "Bessel function".
Best Regards Johan SM6LKM Adnan Yusuf wrote: > Okay people tell me something, suppose I have a soundcard with a > sampling rate of 96khz for recording(mic),can I then use it for FM > reception,ofcourse I am thinking of using the IQ approach. FM signals > lie in the 100Mhz neighbourhood.Please reply stating reasons.Thanks > alot for reading through. > > Yours truly, > Adnan Yusuf
