[ntp:questions] Garmin GPS 18LVC Setup but questions on best way

David Woolley david at ex.djwhome.demon.co.uk.invalid
Tue Dec 30 00:15:05 UTC 2008


George R. Kasica wrote:
> On Mon, 29 Dec 2008 12:30:39 +0000, David Woolley
> <david at ex.djwhome.demon.co.uk.invalid> wrote:

>> You are probably detecting the wrong edge (wrong polarity) of the second 
>> pulse.
> So how in the world do I fix this? 

I suspect Unruh may be right in this case, but you fix a wrong edge 
problem either by inserting an inverter into the hardware chain, or by 
setting the right fudge parameter (which, I think, has just been given 
in one of the other current threads).
> 
> Prior to having both NEMA and PPS running at the same time all was
> working well with just PPS and the shm driver.




More information about the questions mailing list