[USRP-users] X310, 2 Basic RX and quad DDC

Martin Braun martin.braun at ettus.com
Wed Jul 5 15:51:19 EDT 2017


On 06/29/2017 01:09 AM, gwenhael.goavec via USRP-users wrote:
> Hi,
> 
> I use an x310 with 2 basic RX daughterboard. 
> 
> Currently I inject one "real" signal in channelA for side A and a
> second "real" signal in channelA for side B. Now I wish to inject 4
> "real" signals in my USRP and receiving 4 demodulated/filtered IQ
> dataflow on my computer. It's theorically possible because BasicRx
> daughterboard do nothing.
> 
> I've read the Vivado design for this USRP and I've seen in x300_core.v
> (in fact rfnoc_ce_default_inst_x310.v) 2 x noc_block_ddc : I suppose
> (I'm wrong ?) each of them receive 2 dataflow of one ADC (chanA and
> chanB).
> 
> In this module 2 DDC are instanciated. Consequently It's seems to have
> 4 demodulation using cordic24 and 4 CIC.
> 
> Consequently, I suppose my need is possible with official X310 firmware
> but I'm don't know how to configure, through uhd or gnuradio, my USRP
> to provide I0Q0I1Q1I2Q2I3Q3 (this order is not mandatory).
> 
> My assumption is true (or not)? If it's possible someone here could
> help me for this configuration?

Gwen,

this is not (currently) a supported configuration on the X300.

Regards,
Martin




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