Hi all,

we see the following error when executing uhd_usrp_probe:
'...x300_dac_ctrl: timeout waiting for DAC PLL to lock...'
We are working on an x310 (2015) and built a custom RX-Board to it.
This used to work fine;
Recently we have another revision of the custom board
and were trying to set the GPIOs on RXB multiple times to high and low (to set 
the gain of a PGA)...
When changing the GPIO state the 5th or 6th time, we encountered the error as 
above;
We already tried flashing a new image (also one without RFNOC),
but nothing worked so far...

Could the issue be the in the UHD, but how could that have happened?

Any suggestions on how to proceed?

Thank you and best wishes,
Lisa
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