Yes! Tap. The only problem is a sound card can only accommodate 48K - 96K bandwidth, some maybe as wide as 192K. The noise at the center of tuning may wipe out much of this tuning. What is needed is a tunable "Zero IF" double-balanced converter like a SA602(612) or NC1496 on the output of the Tuner chip driven by a very clean VC oscillator, these chips have differential I/Q inputs so the tuner can be used as it was designed and not constrained by that funky 8-bit A to D chip. A 16 bit I/Q sound card conversion of the double-balanced IF tuner output would reveal much the slow 8 bit converter does not, like very good noise cancelation, ultra narrow-band RADAR signals, very high speed frequency hopping, and spread spectrum modulation.

I would create such a thing if I were not involved in more profitable ventures.

Jay Salsburg

-----Original Message----- From: osmocom-sdr-bounces@lists.osmocom.org [mailto:osmocom-sdr-bounces@lists.osmocom.org] On Behalf Of Zilvinas, LY2SS Sent: Wednesday, June 12, 2013 3:14 AM To: osmocom-sdr@lists.osmocom.org Subject: e4000 r820t signal output

Hi all !

Please excuse me if this is a bit off topic.

Is there any sense to tap the IQ signals from e4k or r820t to the internal or external soundcards. Is it possible at all (with r820t particularly) ?

(It could seem like reinventing funcube dongle, bet the performance/price would be still right)

Best regards,

Zilvinas

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