unruh wrote: > David J Taylor wrote: >> "David Woolley" wrote: >> pulse over the length of line he talks about should be no >> problem at all (but a microsecond-wide pulse might). >> The timing PPS I've seen are in the tens of milliseconds wide. >> If there is overshoot, perhaps a capacitor to ... > > Did you mean 10s of ns? The Sure width is about 5-10ns. > at the card without any line attached. > The line could certainly broaden that up to about 1us, but ms? > Even the Garmin 18 is less than a usec.
Really? I must missed something. 20ms to 980ms for the Garmin 18 & 18x LVC PPS? <http://static.garmincdn.com/pumac/GPS_18x_Tech_Specs.pdf> <http://static.garmincdn.com/pumac/425_TechnicalSpecification.pdf> Perhaps you are talking about how close the rising or falling edge is to the actual GPS second? The Garmin 18 LVC says 1us for that. -- E-Mail Sent to this address <[email protected]> will be added to the BlackLists. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
