[ntp:questions] best gps receiver for time synchronization
unruh-spam at physics.ubc.ca
Tue May 12 15:57:32 UTC 2009
"David J Taylor" <david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid> writes:
>Hal Murray wrote:
>> If anybody has figured out how to get good timing out of the
>> SiRF units, please clue me in.
>On my system, I can detect no difference between the GPS 18 and the GSP
>18x. I am looking at jitters in the order of 2.2 microseconds, and
>offsets in the range +170/-100 microseconds.
How are you reading the PPS interrupts>. That offset is terrible. On
my PPS feeding a parallel interrups, the offsets are less than 10us.
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