Re: aliasing with X310 BasicRX (higher order Nyquist zone) ?

On 07/20/2020 07:37 AM, jean-michel.friedt@femto-st.fr wrote:
> I'd like to analyze a higher Nyquist zone with a X310 fitted with a BasicRX:
> trying to listen at 143.5 MHz (GRAVES), I can transpose by 100 MHz but am still
> far from the ~8 MS/s sampling I can use on the Gb Ethernet interface. Since the
> signal is only in the third Nyquist zone, I'd like to tell the BasicRX/DDC *not*
> to anti-alias (CIC filter ?) the received signal. It tried playing with the
> Bandwidth parameter of the USRP Sink but no improvement there.
>
> Is there a way to alias on purpose the signal with X310+BasicRX ?
>
> Thanks, JM
>
> --
> JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe,
> 25000 Besancon, France
>
The X310 has a 200MHz ADC clock by default, so 143.5MHz would be in the
2nd Nyquist zone, would it not?