Direct sampling mode frequency range?

Sylvain Munaut 246tnt at gmail.com
Wed Jan 29 12:27:55 UTC 2014


> Yes, and it has nothing to do with Nyquist because the sample rate you
> receive is only 2MHz or so as per normal.  Direct sampling mode does not
> capture a wider band than normal, it just uses a different method to
> tune the receiver.  So the oscillator frequency is irrelevant, and
> Nyquist doesn't come into it any differently with direct sampling than
> with normal sampling.

Mmm, AFAIK, the rtl ADC work at 28.8 MHz and then the IF tuning is
done by an internal digital DDC (which will also decimate down to 2MHz
or so to ship via usb).


Cheers,

    Sylvain




More information about the osmocom-sdr mailing list