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...
________________________________ De: Tommy Tsui <tommyt...@w5tech.com> Enviado: 31 de maio de 2025 04:14 Para: usrp-users@lists.ettus.com <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. 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
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