On Thu, 22 Mar 2012, unruh wrote:
In addition, it should be noted that in the case of serial PPS
the system time may lag behind UTC by tens of microseconds.
tens of microseconds? Where does this come from? The interrupt
processing time is not that long.
I took these numbers from
http://www.cesnet.cz/doc/techzpravy/2007/ntp-server/.
Measurement of these delays is described in some articles listed in
references.
Karel Sandler
--
e-mail: sand...@ujf.cas.cz
phone: +420266173271
address: NPI, 250 68 Rez, Czech Republic
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