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.
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