The pulse per second output on the Garmin serial/CMOS interface units is only specified to be within 1 microsecond. I guess they are commonly used to synchronize NTP servers where any extra precision would be lost in network transport anyway.
I have been thinking of picking one up cheap to test since the specification is so vague. 1 microsecond makes me think that the pulse per second output is generated from a 1 MHz asynchronous clock. On Wed, 26 Sep 2012 14:11:10 -0600 (MDT), "Don Latham" <[email protected]> wrote: >Have any of the 'nuts hacked one of the very simple very cheap GPS USB >devices for your car top to see if there is an available 1 sec tick >inside one of them somewhere? I have one that I intend to look at, but >I'll have to get a scope and teenyweeny probe outside to do it, so, if >there is a readily available something, I'd like to know. Thanks! >Don _______________________________________________ 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.
