Thanks for the update. I do use all the channels, but perhaps I can at least get through cal more reliably. ________________________________ From: Chris Rogers <[email protected]> Sent: Tuesday, March 3, 2026 11:12 AM To: Eugene Grayver <[email protected]> Cc: usrp-users <[email protected]> Subject: [EXTERNAL] Re: [USRP-users] X440: Could not find appropriate gain for performing ADC self cal
Do not open links or attachments unless you recognize the sender. If unsure, click the Report Phish button or forward the email to OPSEC. I also get an issue like this on my X440. When the radio steps through each channel during calibration, it was consistently failing on channel 2, no idea why. My workaround was to give it the device args parameter "cal_ch_list=0;1;3;4;5;6;7" and this works. I have not actually seen evidence on a scope that this channel really isn't working, so there must be some other internal issue... Fortunately for me, I dont need all channels so I just dont use channel 2. On Tue, Mar 3, 2026 at 12:34 PM Eugene Grayver <[email protected]<mailto:[email protected]>> wrote: Hi, I get the following error about every fourth time I start the software. ------- Error during initialization of block 0/Radio#0! [ERROR] [RFNOC::GRAPH] Caught exception while initializing graph: RuntimeError: Could not find appropriate gain for performing ADC self cal Error: RuntimeError: Failure to create rfnoc_graph. ------- UHD 4.9.0.1 I see it with either uhd_usrp_probe OR rx_samples_to_file. NOTE: there may be an actual hardware problem with one of the channels (TBD). Anyone seen this? Thanks. Eugene Grayver, Ph.D. Principal Engineer 310-336-1274 _______________________________________________ USRP-users mailing list -- [email protected]<mailto:[email protected]> To unsubscribe send an email to [email protected]<mailto:[email protected]>
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