Re: [Discuss-gnuradio] Rotating constellations and varying LOs with USRP B210 + Board Mounted GPSDO

[Nicolas Cuervo]

Hello George,

this question would be better posted in the USRP-usrs list. However, the answer to this is "yes". There is a known issue on the B210 when using GPSDOs and it's report of PLL lock. Are you using the clock reference only from the GPSDO mounted on each of the USRPs? or are you also exporting the time reference from one device to the other? 

On Wed, Aug 30, 2017 at 6:14 PM, George Sklivanitis <address@hidden> wrote:

Hi everyone, 

Has anyone noticed unstable LOs or carrier frequency offsets when using USRP B210s with board mounted GPSDOs?

We have recently been doing field tests using GPS-disciplined oscillators for both USRP B210s and USRP N210 and occasionally both transmitter and receiver flowgraphs lose GPS lock, although clock reference leds in the USRP panel are ON.

Thanks,

George

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