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Can the QLG2 provide PPS over USB?


 

Hello all,
I recently purchased a QLG2 kit and put it together. It works great, gets a fix quickly and works well with GPSd, with only a single caveat: I can't get PPS timing using the USB port.
My delta-T hovers around 0.5 seconds at best, and I'd like 0.25 second accuracy.
Reading the manual, there's no mention of PPS over USB... is there a mod or something I can do in order to get better timing precision over USB?
Thanks,
Scott KI5WLJ.

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