In message <[EMAIL PROTECTED]> Nate Williams writes:
: > : Cool. I was under the impression that the cheap NMEA signals only gave
: > : 2-5sec accuracy given the 2400 baud speed issues.
: >
: > If you have a PPS signal, then you can get fairly close even if the
: > inforation about the PPS signal comes in at 2400 baud.
:
: Hmm, how do I find out how good it is?
By looking at the docs to see if it supports PPS or not. PPS is Pulse
Per Second and is a dedicated signal that pulses (typ 10mS) once per
second. For serial devices, this is typically done by one of the
extra RS-232 signals, DSR comes to mind. I suppose you could hook a
scope up to the unit and see if any of the signals are acting like
PPS.
Warner
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