On 2022-02-03 15:46, John Hodgins wrote:
Thanks for the clarification. We are using GPSDO to provide 10 MHz/PPS
to the USRPs. Jackson Labs OCXO for the X310 and TCXO for the B210.
For E310 we just use the GPS antenna which I guess is connected to a
ublox module.
Best,
John
So, just to clarify, two GPSDOs will NOT agree precisely on 10MHz
reference phase, and the mutual phase-noise between them will be much
higher than you might
expect, even when sharing the same antenna.
You can only do coherence experiments (cross correlating sample streams)
when the radios involved all share the same 10MHz reference clock. You
don't get this
with two (or more) independent GPSDO outputs.
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