[USRP-users] E313 PoE requirements

2020-01-31 Thread Sebastian Bräuer via USRP-users
Hi everyone, just a quick questions: Which PoE standards are supported by the USRP E313? I have a 802.3at PoE injector (30W) but it does not seem to boot up (although the LED on the outside is on). Do I need more power? Thanks in advance! Sebastian _

[USRP-users] "No upstream blocks" Warning

2018-09-07 Thread Sebastian Bräuer via USRP-users
Hi, I am currently working on a custom rfnoc block that needs input from the DDC but also gets samples from the host and sends them to the radio via the DUC. The block works perfectly in simulation and even in gnuradio but for some reason I cant get it to work in pure UHD.  In my UHD code I always

Re: [USRP-users] "No upstream blocks" Warning

2018-09-07 Thread Sebastian Bräuer via USRP-users
Okay, thanks for the advice. I added a FIFO in between the host and my block. I had not thought of this, because I never really intended to receive samples from this port. I just need a port to get the receive chain started. Now I'm not a getting a warning anymore, which is good I guess. But stil

[USRP-users] Rfnoc latency

2018-09-28 Thread Sebastian Bräuer via USRP-users
Hi, I am currently working on a custom block that implements Listen-Before-Talk directly on the X310 and I have question regarding the latency that I can expect in between RFnoC blocks. This article [1] claims that each block delays the signal by about 2us which would put the turn-around time for

[USRP-users] RFNoC packet sizes

2019-09-04 Thread Sebastian Bräuer via USRP-users
Hi, I am currently trying to optimize my RFNoC application for latency and I have some questions regarding the packet sizes between blocks: 1) If I set the "spp" parameter of the receiving radio block, does this value "propagate" upstream, i.e. does this set the packet size for all following

Re: [USRP-users] RFNoC packet sizes

2019-09-05 Thread Sebastian Bräuer via USRP-users
Hi Jonathon, thanks for the quick response. It is a UHD application and I set the radios spp via radio->set_arg before creating the streamers. Sebastian On 06.09.19 03:52, Jonathon Pendlum wrote: Hi Sebastian Is this a UHD app or a GNU Radio flowgraph? Are you setting the spp via stream a