[time-nuts] Why are 1PPS signals so skinny?

mike cook michael.cook at sfr.fr
Mon May 14 16:04:58 UTC 2012


Le 14/05/2012 17:23, Mark Sims a écrit :
> My first inclination,  if I were building a timing receiver,  would be to make the PPS output a nice,  symmetrical square wave.   But pretty much all GPS timing receivers output an anorexic,  dinky little heroin addicted supermodel sized pulse (from 1 to 150uS wide is typical). 		 	   		
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NAVMAN Jupitr-T    26 ms
ONCORE VP ~200ms
                    UT+    200ms
                    M12T  1PPS 200ms 100Hz 2-3ms

these are all timing receivers and the signals will trip serial 
receivers without pulse stretching..

So the picture is not that gloomy.





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