albertson.ch...@gmail.com said: > For GPS you need to also include the microseconds long pulse per second. I > think it might by the very short duty cycle of the pulse that makes it hard > to transmit using RS-232 style signaling.
The problem with short PPS pulses is that some PCs don't catch them. (I have one that only catches some of them.) One simple solution is the FatPPS from TAPR. https://www.tapr.org/kits_fatpps.html Many (most?) low cost GPS units with a PPS have a long one, 100 ms or 500 ms. I think the Garmin GPS-18 units are adjustable in 100 ms steps. Most of the GPSDOs have short PPS pulses, typically 10 or 20 microseconds. The HP Z3801A manual says 10-50 microseconds. My scope shows about 26. I couldn't find any spec in the TBolt manuals. My scope shows 10 microseconds. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.