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Re: [Discuss-gnuradio] Recording simultaneously multiple FM station with

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Recording simultaneously multiple FM station with Gnuradio
Date: Sun, 04 Nov 2012 10:11:17 -0500
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On 11/04/2012 09:59 AM, Olivier Austina wrote:

I am newbie in this forum. I would like to know if it is possible to record simultaneously many FM stations with single SDR tuners or many SDR tuners. Can the ezcap USB 2.0 DVB-T/DAB/FM dongle can be used for this end. If yes how many channels, it can record simultaneously.Any suggestion is welcome.Thanks.


Well, the practical bandwidth limitation on the RTL is 2.4Msps.

At 200kHz channel spacing that's 12 stations.

Your limitation will be whether you have enough CPU cycles to demodulate all of those at once. The Dongle doesn't "know" anything about demodulation, and Gnu Radio places no limit on how many demodulators you can be running in parallel, but from a practical perspective,
  you'll be limited by CPU and memory bandwidth.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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