Nelson Minar wrote:
>
> Does PPS tell us anything about the actual source of time? Or does that 
> just mean "time from a serial port"?
>
>   

In my case PPS mean time from a TrueTime GPS -DC as seen on the parallel 
port of my server.  It's always about 6us off from time from a GPS18 on 
the serial port.  I suspect the difference comes down to IRQ priority 
between the two.

John
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