On 7/21/13 7:15 AM, David McGaw wrote:
The GPS-18 does NOT output 1PPS until it acquires lock. Then the 1PPS
stays on even if lock is lost, running from the internal crystal. I
have not checked, but once it reacquires lock I presume it jumps to the
correct second. All outputs including 1PPS are CMOS levels, so it
drives both low and high.
David
OK.. so my "wire or" question can be answered.. I've got a bunch of
microcontrollers (teensy3 from pjrc) with High Z inputs that I want to
sync, and since the Garmin 1pps can both source and sink, a diode and
resistor might work well. When I don't have 1pps, I can have one of the
modules reconfigured to be a source, with a series resistor.
Thanks all..
_______________________________________________
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.
