Re: [USRP-users] RX Misalignment on 6x1 MISO system using X310 and UBX-160

2019-10-18 Thread Marcus D. Leech via USRP-users
On 10/18/2019 03:35 PM, Carlos Bocanegra wrote: Hi all, Thanks a lot Sam and Marcus for replying so quickly. Le me first include Marcus answer in this email chain for a cleaner communication: "/Gnu Radio cannot really misalign samples, unless the DSP logic arranges for that to happen. If you

Re: [USRP-users] RX Misalignment on 6x1 MISO system using X310 and UBX-160

2019-10-18 Thread Carlos Bocanegra via USRP-users
Hi all, Thanks a lot Sam and Marcus for replying so quickly. Le me first include Marcus answer in this email chain for a cleaner communication: "*Gnu Radio cannot really misalign samples, unless the DSP logic arranges for that to happen. If you have a block with a bunch of streams, that blocks "w

Re: [USRP-users] uhd_fft failure

2019-10-18 Thread Saeid Hashemi via USRP-users
Okay, so installing python-six fixed that, and I was able to install 3.7.13.5 from source. The sample apps like uhd_fft are not in the path like they used to be with binary installation. And trying it from the apps folder gives me: nuc03@nuc03:/usr/local/bin$ /home/nuc03/gnuradio/gr-uhd/apps/uhd_f

[USRP-users] E310 packet size

2019-10-18 Thread Skorstad , Jørn via USRP-users
Hi all, Still trying to understand some parts of the USRP that probably are quite elementary. When using the function get_max_num_samps it always reports 508. Does this mean that the number of samples returned for any requested sample rate will be decimated down to 508? Any way to change max_nu

Re: [USRP-users] N310 sensitivity

2019-10-18 Thread Marcus D Leech via USRP-users
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 > wrote:

Re: [USRP-users] RX Misalignment on 6x1 MISO system using X310 and UBX-160

2019-10-18 Thread Sam Reiter via USRP-users
Carlos, On the host side if you're using a single streamer, it will work to time-align samples from every USRP as they come in. The reason you see 1002 received packets without a timestamp match is because 1000 was the threshold for maximum number of alignment failures [1]. This can be changed or

[USRP-users] N310 sensitivity

2019-10-18 Thread Johannes Demel via USRP-users
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)