Re: Direct sampling mode frequency range?

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