What antenna are you specifying and which port are you rurally plugged in to.
Are you using offset tuning? That may be necessary for Narrow signals near the tuned frequency, due to DC offset removal. Sent from my iPhone > On Oct 18, 2019, at 7:06 AM, Johannes Demel via USRP-users > <[email protected]> wrote: > > Hi all, > > I figured out how to use our new N310s. > > I ran into the next issue. Let me describe this one briefly. > > With our X310s I set TXgain=20 and RX_gain=10. Both devices are 1-2m > apart. I observe a really nice RX constellation with gr-gfdm and > XFDMSync with bursts every 1ms (burst length ~50us). With our N310s I > set RXgain=60, TXgain=70 and still, the constellation is very noisy. > My assumption is that some part of the RX chain is not configured > correctly. But I don't know what the problem is in particular. > Also, I used an X310 as transmitter and an N310 as receiver. But the > result is the same, the RX constellation is really noisy. > > Another observation is, that my RX sample stream in a GR time sink does > show quantization artifacts. i.e. I can see discrete steps which I > assume are due to low RX sensitivity. The RX value amplitude is around > 0.0005 for the samples that I get of a USRP source. I assume this should > be a higher value. With the X310s it was more like 0.1. > > Do I need to take special care when I only use 1 antenna port? > Is there another AGC setting that I need to configure for N310s? > > Johannes > > Software > UHD: 3.14.1.1 > GR: 3.8 > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
