Re: [Discuss-gnuradio] Wideband receiver considerations for USRP2

[Matt Ettus]

Ulrika Uppman wrote:
> Hi, I'm thinking about how to receive data in a wider frequency range
> width the USRP2, and I stumbled over some questions:
>
> Is it possible to set the decimation rate less than 4? All the
> documentation I have found is saying that 4 is the least
> interpolation/decimation value, but is there any actual constraints
> in the hardware that makes it impossible to use a decimation of 2?
>
> With a decimation rate 2 I understand that I will have to send the
> data in 8 bit per sample instead of 16 bit per sample over the wire.
> Has anyone implemented this functionality for the USRP2, or do the
> non-implemented parts have anything to do with the upcoming VRT work?


It should be possible to do what you want with some changes to the FPGA 
code.  However, we have not put any effort in to doing this because some 
of this would have to be redone after the move to VRT.

Matt