I have the K3EXREF and XTCXO3-1 installed on my K3s and have a Jackson Labs
LC-XO-Plus GPSDO attached to the factory-installed port. The config setting
REF*CAL shows the * to be blinking, indicating data is being received.

I tuned into WWV 10MHz and found that my K3s time was pretty far off, based
on the audible signal. Using Config:Time, I can adjust the time to match the
audible beat. I guess the K3EXREF address frequency but not clock time?

I have a separate GPSDO running from ToyNTP http://www.dxatlas.com/ToyNtp/
to keep my PC on time to less than +/- 50 microseconds. There's some high
latency somewhere... But digital modes like WSPR have adequately accurate
reference time.

Bret/N4SRN



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