[USRP-users] Different gain traces at RX interfaces

Hello All, My instrument (USRP X310) has 2 equivalent UBX-160 daughter boards. *| | | RX Dboard: A| | | ID: UBX-160 v2 (0x007e)| | | Serial: 31D5AC* * RX Dboard: B| | | ID: UBX-160 v2 (0x007e)| | | Serial: 31D5B02* I applied an equivalent external stimulus a

[USRP-users] Planning to buy USRP

Hi, I was working with LimeSDR with OpenAirInterface, We are not getting the desired result. We are planning to buy USRP. Please suggest which USRP shall we buy which should be compatible with openairinterface as well as free5GC. Please let me know what are the other hardware requirements to wor

[USRP-users] Which ports to secure with RF terminators and how to setup loopback testing.

Hello, i am a newbie to this so i would appreciate all help and pointers for reading/understanding what i should (please excuse possibly newbie questions, thanks!). I have configured 2 usrp n310 devices, following the instructions from: https://kb.ettus.com/USRP_N300/N310/N320/N321_Getting_Starte

[USRP-users] 10us+ sample delay between daughterboards

Hi all, I have an issue with multiple USRP streams. If they are on separate daughterboards, but on the same motherboard aka USRP, those streams are not time aligned. They show a time offset of more than 10us. I use one USRP source block in GNU Radio and configure it with multiple streams. At

Re: [USRP-users] 1 Ts delay in USRP B210

Thanks! a lot Marcus M and Marcus D for your valuable information. Thanks, -Original Message- From: Marcus Müller [mailto:marcus.muel...@ettus.com] Sent: Tuesday, July 21, 2020 11:07 PM To: usrp-users@lists.ettus.com; Prasad Subject: Re: [USRP-users] 1 Ts delay in USRP B210 Hello Prasad

[USRP-users] C++ thread Priority.

Hello, I have made a c++ code which sends samples in the main function and receives samples in a thread launched in this main function. I have read that we can set the real time priority with the set_thread_priority function. I have tried to call this function (with parameters (1,true) inside the m

Re: [USRP-users] 10us+ sample delay between daughterboards

On 07/22/2020 12:39 PM, Johannes Demel via USRP-users wrote: Hi all, I have an issue with multiple USRP streams. If they are on separate daughterboards, but on the same motherboard aka USRP, those streams are not time aligned. They show a time offset of more than 10us. I use one USRP source b

Re: [USRP-users] Which ports to secure with RF terminators and how to setup loopback testing.

On 07/22/2020 05:12 AM, Pavlos Basaras via USRP-users wrote: Hello, i am a newbie to this so i would appreciate all help and pointers for reading/understanding what i should (please excuse possibly newbie questions, thanks!). I have configured 2 usrp n310 devices, following the instructions

Re: [USRP-users] Planning to buy USRP

On 07/22/2020 04:45 AM, Kumari, Surabhi via USRP-users wrote: Hi, I was working with LimeSDR with OpenAirInterface, We are not getting the desired result. We are planning to buy USRP. Please suggest which USRP shall we buy which should be compatible with openairinterface as well as free5GC.

Re: [USRP-users] Different gain traces at RX interfaces

On 07/22/2020 04:37 AM, Arash Jafari via USRP-users wrote: Hello All, My instrument (USRP X310) has 2 equivalent UBX-160 daughter boards. *| | | RX Dboard: A | | | ID: UBX-160 v2 (0x007e) | | | Serial: 31D5AC* * * * RX Dboard: B | | | ID: UBX-160 v2 (0x007e) | |

Re: [USRP-users] C++ thread Priority.

On 07/22/2020 12:56 PM, David Carsenat via USRP-users wrote: Hello, I have made a c++ code which sends samples in the main function and receives samples in a thread launched in this main function. I have read that we can set the real time priority with the set_thread_priority function. I have tr

Re: [USRP-users] C++ thread Priority.

Ok thanks. The code is really simple and i don't think it can be optimized. Is there other linux OS i can try ? Thanks again. Le mer. 22 juil. 2020 à 19:12, Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> a écrit : > On 07/22/2020 12:56 PM, David Carsenat via USRP-users wrote: > > He

Re: [USRP-users] C++ thread Priority.

On 07/22/2020 01:22 PM, David Carsenat wrote: Ok thanks. The code is really simple and i don't think it can be optimized. Is there other linux OS i can try ? Thanks again. If it's really simple, what is the sample-rate? Is it trying to write data to the filesystem at high rates? No amount of

Re: [USRP-users] C++ thread Priority.

It just put received samples in a circular buffer and transmit this buffer. A delay line. But the SR is 50 Msps... 8 bits. Do you have ideas about OS ? Thanks. Le mer. 22 juil. 2020 à 19:33, Marcus D. Leech a écrit : > On 07/22/2020 01:22 PM, David Carsenat wrote: > > Ok thanks. The code is re

Re: [USRP-users] C++ thread Priority.

On 07/22/2020 01:40 PM, David Carsenat wrote: It just put received samples in a circular buffer and transmit this buffer. A delay line. But the SR is 50 Msps... 8 bits. Do you have ideas about OS ? Thanks. There are commercial real-time low-latency OS "out there" that aren't free, and UHD ha

Re: [USRP-users] Signal transmission on a USRP X310

Hello Marcus, The tool I have been using for initial signal quality checking has been the QT Waterfall sink in GNU Radio Companion to see if the signals are looking correct. Upon seeing that it looked like I was loosing data when I set the USRP sink's center frequency above 1.3 GHz, I connected

Re: [USRP-users] Signal transmission on a USRP X310

On 07/22/2020 02:15 PM, Jerrid Plymale via USRP-users wrote: Hello Marcus, The tool I have been using for initial signal quality checking has been the QT Waterfall sink in GNU Radio Companion to see if the signals are looking correct. Upon seeing that it looked like I was loosing data when I

Re: [USRP-users] X310 with DPDK

I have used DPDK with the X310. I don't recall specifically, but I'm pretty sure you either... a) don't specify mgmt_addr, or b) specify it the same as addr On Tue, Jul 21, 2020 at 12:12 PM Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > On 07/21/2020 10:53 AM, Carmichael,

Re: [USRP-users] C++ thread Priority.

If you are using X310 or N310, you might try DPDK. Even though it is a pain, it would be a whole lot easier than trying a new OS, I believe. Using DPDK enabled my application (which was storing Rx samples to SSD) to run a bunch faster than without DPDK. On Wed, Jul 22, 2020 at 1:47 PM Marcus D. Le

Re: [USRP-users] C++ thread Priority.

On 07/22/2020 03:18 PM, Rob Kossler wrote: If you are using X310 or N310, you might try DPDK. Even though it is a pain, it would be a whole lot easier than trying a new OS, I believe. Using DPDK enabled my application (which was storing Rx samples to SSD) to run a bunch faster than without DPD

Re: [USRP-users] gnuradio-companion can not find RFNOC blocks

Cherif, Did you install gr-ettus? Unless you are using UHD on master branch (4.0), you need gr-ettus. I installed UHD3.15LTS on Ubuntu 18.04 without PYBOMBS and it works fine. Jeff From: USRP-users on behalf of Marcus Müller via USRP-users Sent: Tuesday, J

[USRP-users] X310 RFNoC Basic Transmit Signal Source Flowgraph Not Working

I get a set_tx_gain error running a basic signal generator through RFNoC Radio: Signal Source -> DMA FIFO -> DUC -> Radio (See image below) This is equivalent to: Signal Source --> USRP Sink(Works fine) https://kb.ettus.com/File:dma_fifo_v02.png

Re: [USRP-users] How to suppress the overflow indicator "O"

Hi Xavier, Thank you for your advice. I will try it next Monday and let you know. Regards, Mikio 2020年7月22日(水) 15:51 Xavier Arteaga : > Hi Mikio, > You can disable the fastpath logging in runtime by setting the environment > variable UHD_LOG_FASTPATH_DISABLE to 1: > > Example in C: > setenv("U