[USRP-users] USRP B210 does not lock to external reference clock

Martin Braun martin.braun at ettus.com
Wed Jul 5 15:45:29 EDT 2017

On 06/30/2017 01:44 AM, George Vardakis via USRP-users wrote:
> Hi all,
> It seems i have a problem with one of my two USRP B210 devices. I
> connect them both to my ClockTamer, external reference clock, and only
> one of them locks to the 10 MHz reference. The other one, always the
> same device, does not lock. Should i start worrying this is a hardware
> issue, or is there anything i can do to try to fix it?

Can you confirm the output levels of the clocktamer, and that you're
setting the clock source to external? And do you have a GPSDO on the board?

-- M

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