Synchronizing multiple USRP N210 boards

Hello,

Is it possible to disable the clock/LO on USRP N210 and use a single
master clock from one board to all other boards?

I was using 10MHz/1PPS reference to synchronize eight boards. Though
this way channels are synchronized but with a “random” fixed phase
offset error. I don’t know how to get this phase difference in real time
and how to correct for it. In a phased antenna array, it is causing me a
problem.

Thanks,

Khalid.