[USRP-users] E310 Rx Timeout with higher sampling rates

mleech at ripnet.com mleech at ripnet.com
Thu Apr 30 15:09:09 EDT 2015


 

Are you running this native on the E310, or via "network mode"? 

If native, try an "rx_samples_to_file" recording to /dev/null. What
sample-rate can you achieve, try different host-side data formats. 

On 2015-04-30 14:45, Voss, Nathan J via USRP-users wrote: 

> I am in the process of porting code that was built and tested successfully on a USRP N200 to a USRP E310. The sampling rate is user-configurable, and we really need to support as large a bandwidth as possible. On the N200, my code worked fine for sampling rates up to ~15Msps, but on the E310 the same code is struggling to run over about 500Ksps. 
> 
> When I set the sampling rate on the E310 above about 500Ksps, I initially get one or two 'O' overflow notifications, and then start to get timeout errors very frequently. My code is fairly simple, in that I'm calling 'usrp->recv()' in a pretty tight loop, very similar to the 'rx_samples_to_file' example. The timeout value I'm passing into the recv() call is currently 3.0 seconds, and my 'nsampls_per_buf' is typically 512.
> 
> Thanks for your help.
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