[time-nuts] Accuracy/drift of Garmin GPS 16 HVS 1 PPS output under invalid fix conditions...

[Steve Olney]

Hi Bob,

On 12/03/2019 9:04 am, Bob kb8tq wrote:
> A “proper” timing device with antenna is a sub $100 sort of thing. It will be < 100 ns pretty much forever and ever.

Yes - understood.  The system I am building needs to generate a gate on 
a known zero-second boundary.   At the moment I am working on a 
three-tier system...

 1. Windows PC providing a gate about one minute duration (+/- 30
    seconds around the required zero-second).  Hopefully Windows can
    manage that...
 2. Microcontroller identifying the zero-second within that minute and
    providing a gate +/- 500 ms around the zero-second.
 3. And-ing the 1 PPS signal with this gate to clock the final output
    gate opening.

Cheers

Steve