Information about the sampling rate of the RTLSDR driver

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frederic.evennou at orange.com frederic.evennou at orange.com
Mon Dec 17 13:29:48 UTC 2012


Thanks for your answer.
I increased the size of the output buffer but, I'm still having the problem.
With a buffer of 262144 bytes, at 2.048 Ms/s, it should be full every 16ms, but my program indicates 64ms.
Could it be due to a limitation on USB ports, or on my Device (Terratec Cinergy TStick RC) ?

Cheers
Frederic

-----Message d'origine-----
De : Sylvain Munaut [mailto:246tnt at gmail.com] 
Envoyé : lundi 17 décembre 2012 10:26
À : EVENNOU Frederic OLNC/OLPS
Cc : osmocom-sdr at lists.osmocom.org
Objet : Re: Information about the sampling rate of the RTLSDR driver

Hi,

> and my storing buffer is 8*1024 bytes, so I expect receiving 1024 I/Q samples every 500 microseconds.

This looks awefully small, try a larger buffer ... too small buffers
cause too much overhead and can cause overruns ... default buffer size
is 262144 , try with that.

Cheers,

   Sylvain

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