Date: Sat, 31 Jul 2004 21:25:04 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: oberman@es.net Cc: FreeBSD-stable@FreeBSD.org Subject: Re: Looking for ntp/PPS setup guide Message-ID: <200408010125.i711P44H056311@khavrinen.lcs.mit.edu> In-Reply-To: <20040731231908.18F485D08@ptavv.es.net> References: <20040731.144627.06076085.imp@bsdimp.com>
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In article <20040731231908.18F485D08@ptavv.es.net> you write:
>From what I have seen, the non-kernel PPS software handles jitter more
>gracefully than the kernel version.
Which CDMA receiver do you have? I'm using one from EndRun
Technologies which emulates a Trimble Palisade and it seems to perform
fairly well:
remote refid st t when poll reach delay offset jitter
==============================================================================
*GPS_PALISADE(0) .CDMA. 0 l 1 32 377 0.000 -0.016 0.008
+NAVOBS1.MIT.EDU .PSC. 1 u 37 64 377 0.836 0.027 0.025
xtime-b.nist.gov .ACTS. 1 u 49 64 377 15.477 -6.898 9.374
+ntp2.usno.navy. .USNO. 1 u 10 64 337 40.016 -2.378 83.946
-gps.freebsd.dk .GPS. 1 u 51 64 377 115.848 4.315 1.408
This receiver was recommended to me by Dave Andersen (dga@).
(Actually, I stole it from him.) This is using the host-triggered
timestamp mode of this device rather than PPS.
-GAWollman
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