[email protected] wrote on 07/01/2010 12:06:54 PM: > From: > > Paul Nicholson <[email protected]> > > To: > > Discussion of precise time and frequency measurement <[email protected]> > > Date: > > 07/01/2010 12:08 PM > > Subject: > > Re: [time-nuts] Long period variation of GPS PPS timing? > > Sent by: > > [email protected] > > Thanks all for the various replies, on and off list. > > John WA4WDL wrote: > > Perhaps you should use only the leading edges for the > > pulse-to-pulse interval measurement. > > Yes, I'm just using the leading edge, turning it into a pulse > using a couple of RC networks, slowing the rise and fall enough > to give a nice shape for accurate locating of the centroid.
The centroid of pulses triggered by the leading edge of the 1PPS pulse will vary with the width of the pulses. If you are using a non-precision pulse generator, many things can affect the apparent locations of the 1PPS pulses. Like changes in temperature and/or supply voltage. Joe Gwinn _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
