"unruh" <un...@invalid.ca> wrote in message
news:Obt5r.32277$hr6.15...@newsfe21.iad...
[]
Since a 1 second error in nmea would also impact the PPS output, his
observation is far from irrelevant. That was what happened with the
Garmin 18x-- the nmea offset became greater than a second, and all hell
broke out.
So you agree with me, that the NMEA output is not to be trusted. However,
it should not be an issue in a GPS designed and specified for timing
purposes, and working to specification.
But Ron's BU-353 GPS is not designed for timing, and there is no
specification on the datasheet saying when the sentences are output
relative to the second edge. The device has /no/ PPS output. It is
unsuitable for NTP.
David
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