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]> 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] > To unsubscribe send an email to [email protected] >
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