Hi Alexandre, This was confirmed by Tom on his email on 4th June. Link: https://www.mail-archive.com/usrp-users%40lists.ettus.com/msg18359.html BR
Sumit Kumar Research and Technology Scientist https://www.linkedin.com/in/sumitstop https://sites.google.com/view/sumit1985 https://scholar.google.com/citations?hl=en&user=-qjjN2sAAAAJ Luxembourg Institute of Science and Technology (LIST) 5, avenue des Hauts-Fourneaux | L-4362 Esch-sur-Alzette [cid:ee829769-e2b4-44fd-87a1-4723cf7ecbf5] ________________________________ From: Alexandre José Monteiro Sério via USRP-users <usrp-users@lists.ettus.com> Sent: Thursday, June 12, 2025 7:12 PM To: Marcus D. Leech <patchvonbr...@gmail.com>; usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> Subject: [USRP-users] Re: UHD 4.8 set_tx_bandwidth() and set_rx_bandwidth() method no longer works Hi Marcus, My USRPs are the USRP-2944 from NI, and the daughterboards are UBX-160. Here i find that "set_XX_bandwidth() is used to configure the analog filter channel: https://files.ettus.com/manual/classuhd_1_1rfnoc_1_1rf__control_1_1core__iface.html#a71f0132ae3c35a62e793e5aab1d8f11b With your answer, i am now in doubt. In context, at the "usrp_lib.cpp" file of the OpenAirInterface5G software they have the following snippet of code: ------------------------------------------------------------------------------------------------------ if (device->type != USRP_N300_DEV) { for(int i=0; i<((int) s->usrp->get_tx_num_channels()) && i<openair0_cfg[0].tx_num_channels; i++) s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i+choffset); for(int i=0; i<((int) s->usrp->get_rx_num_channels()) && i<openair0_cfg[0].rx_num_channels; i++) s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i+choffset); } for (int i=0; i<openair0_cfg[0].rx_num_channels; i++) { LOG_I(HW,"RX Channel %d\n",i); LOG_I(HW," Actual RX sample rate: %fMSps...\n",s->usrp->get_rx_rate(i+choffset)/1e6); LOG_I(HW," Actual RX frequency: %fGHz...\n", s->usrp->get_rx_freq(i+choffset)/1e9); LOG_I(HW," Actual RX gain: %f...\n", s->usrp->get_rx_gain(i+choffset)); LOG_I(HW," Actual RX bandwidth: %fM...\n", s->usrp->get_rx_bandwidth(i+choffset)/1e6); LOG_I(HW," Actual RX antenna: %s...\n", s->usrp->get_rx_antenna(i+choffset).c_str()); } for (int i=0; i<openair0_cfg[0].tx_num_channels; i++) { LOG_I(HW,"TX Channel %d\n",i); LOG_I(HW," Actual TX sample rate: %fMSps...\n", s->usrp->get_tx_rate(i+choffset)/1e6); LOG_I(HW," Actual TX frequency: %fGHz...\n", s->usrp->get_tx_freq(i+choffset)/1e9); LOG_I(HW," Actual TX gain: %f...\n", s->usrp->get_tx_gain(i+choffset)); LOG_I(HW," Actual TX bandwidth: %fM...\n", s->usrp->get_tx_bandwidth(i+choffset)/1e6); LOG_I(HW," Actual TX antenna: %s...\n", s->usrp->get_tx_antenna(i+choffset).c_str()); LOG_I(HW," Actual TX packet size: %lu\n",s->tx_stream->get_max_num_samps()); ------------------------------------------------------------------------------------------------------ From what i am understanding, this set_XX_bandwidth() functions are not doing anything since UBX-160 daughterboards work at a fixed analog bandwidth of 160 MHz, is that right??? (In my case of these x310, the value that is passed over "openair0_cfg[0].tx_bw" is 5 MHz) Fact is that, when i was using v4.7.0.0 of the UHD lib, the output values from the "get_XX_bandwidth()" were the same passed by the "set_XX_bandwidth()". That doesn't happen when using v4.8.0.0. Thats why i'm confused by your answer. I'm a begginer in the USRP usage, so i'm trying to understand and learn so any "docs or references" are mostly welcome too... Thank you Marcus ________________________________ De: Marcus D. Leech <patchvonbr...@gmail.com> Enviado: 4 de junho de 2025 15:19 Para: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> Assunto: [USRP-users] Re: UHD 4.8 set_tx_bandwidth() and set_rx_bandwidth() method no longer works Atenção: Este email foi originado fora da MEO SGPS, S.A. Por favor, não clique em links nem abra anexos, a não ser que conheça o remetente e saiba que o seu conteúdo é seguro. On 2025-06-04 08:15, Alexandre José Monteiro Sério via USRP-users wrote: I'm working with NI x310 USRPs for OAI testing and developing purposes and, when using v4.8 of the UHD i have the same issue as well. With the v4.7, the set_tx_bandwidth()/set_rx_bandwidth() do work, getting the values from the get_tx_bandwidth()/get_tx_bandwidth() in accordance. In the case of v4.8, it seems that those "set" functions are not doing anything as you say... Couldn't find any solution or explanation for that yet... The set_XX_bandwidth calls configure the *ANALOG* bandwidth of the RF front-end on the USRP. In MANY cases, those analog front-ends have no way to set the analog bandwidth, so those calls do nothing. I can't immediately think of any X310-compatible daughtercards that have variable analog bandwidth--which cards do you have? ________________________________ De: Tommy Tsui <tommyt...@w5tech.com><mailto:tommyt...@w5tech.com> Enviado: 31 de maio de 2025 04:14 Para: usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> <usrp-users@lists.ettus.com><mailto:usrp-users@lists.ettus.com> Assunto: [USRP-users] UHD 4.8 set_tx_bandwidth() and set_rx_bandwidth() method no longer works You don't often get email from tommyt...@w5tech.com<mailto:tommyt...@w5tech.com>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> Atenção: Este email foi originado fora da MEO SGPS, S.A. Por favor, não clique em links nem abra anexos, a não ser que conheça o remetente e saiba que o seu conteúdo é seguro. Hi, Recently I upgraded UHD driver from 4.7 to 4.8. After the update, I discovered my RFNOC application has a new issue. Method set_tx_bandwidth() and set_rx_bandwidth no longer works properly. A call to get_tx_bandwidth() and get_rx_bandwidth() returned 40MHz regardless of the bandwidth parameter specified in the set function call. I installed UHD 4.8 FPGA image to my X310 properly. I built UHD 4.8 driver source and installed it on my development host without any issue. When running the same app compiled with UHD 4.7, get_tx_bandwidth() and get_rx_bandwidth() returned the same value as the parameter specified in the set method call. I compiled the UHD RFNOC example application rfnoc_radio_loopback with UHD 4.8 library. It produced a similar issue. Has anyone experienced the same issue on UHD 4.8? In some old posts, some people thought set_tx_bandwidth() and set_rx_bandwidth() doesn’t do anything if the radio daughter card has a fixed analog bandpass filter. Is it still the case for UHD 4.8? The radio daughter card WBX-120 has a fixed bandwidth of 40MHz, but I would assume set_tx_bandwidth() and set_rx_bandwidth() adjust the digital filter bandwidth rather than the analog RF bandpass filter. Hardware & Software driver used: X310, radio daughter card WBX-120. UHD 4.8 release installed on the Ubuntu host, UHD 4.8 release FPGA (usrp_x310_Fpga_HG.bit) installed on X310. Host OS: Ubuntu 24.04 LTS Tom ________________________________ The information contained in this e-mail and any attachments from W5 Technologies, Inc. may contain confidential and/or proprietary information, and is intended only for the named recipient to whom it was originally addressed. If you are not the intended recipient, any disclosure, distribution, or copying of this e-mail or its attachments is strictly prohibited. If you have received this e-mail in error, please notify the sender immediately by return e-mail and permanently delete the e-mail and any attachments. AVISO DE CONFIDENCIALIDADE Esta mensagem e quaisquer ficheiros anexos a ela contêm informação confidencial, propriedade do grupo MEO e/ou das demais sociedades que com ela se encontrem em relação de domínio, Fundação MEO e MEO ACS, destinando-se ao uso exclusivo do destinatário. Se não for o destinatário pretendido, não deve usar, distribuir, imprimir ou copiar este e-mail. Se recebeu esta mensagem por engano, por favor informe o emissor e elimine-a imediatamente. Obrigado _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> To unsubscribe send an email to usrp-users-le...@lists.ettus.com<mailto:usrp-users-le...@lists.ettus.com>
_______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
