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>
*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
_______________________________________________
USRP-users mailing list --usrp-users@lists.ettus.com
To unsubscribe send an email tousrp-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
