[USRP-users] RFNoc Signal Output

Eugene Chai eugene at nec-labs.com
Mon Mar 21 00:19:11 EDT 2016


Hi Jonathon,

I’m transmitting 3x streams at 15.36MHz each.  Is it possible to use timed transmissions with RFNoC?  Will RFNoC then report if any of the transmissions were late?  The output of the RFNoC block is a FIFO RFNoC block, which is in turn connected to a TX radio interface.

Thanks,
Eugene

> On Mar 20, 2016, at 3:30 PM, Jonathon Pendlum <jonathon.pendlum at ettus.com> wrote:
> 
> Hi Eugene,
> 
> What rate are you running the radio at? It could be possible you are underflowing the radio core. With current rfnoc-devel you would not know since the underflow packets are not forwarded to the host.
> 
> 
> 
> Jonathon
> 
> On Sat, Mar 19, 2016 at 10:48 AM, Eugene Chai via USRP-users <usrp-users at lists.ettus.com> wrote:
> Hi,
> 
> I have an RFNoC block on an X310 with three input and one output port.  I used the addsub block as a starting point, and I’m working on the rfnoc-devel git branch.   The RFNoC block acts as a mux — it  takes three continuous streams from the host PC, and selects one of them for the output.  However, during testing, the output signal seems to be discontinuous.  I’ve attached a plot of the output signal that I captured over the air with a second X310.  Does anybody know what could be wrong here?
> 
> Thanks,
> Eugene
> 
> 
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