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- Path: sparky!uunet!olivea!spool.mu.edu!agate!ucbvax!UDEL.EDU!Mills
- From: Mills@UDEL.EDU
- Newsgroups: comp.protocols.time.ntp
- Subject: Re: PC-bus time cards
- Message-ID: <9212291317.aa16983@huey.udel.edu>
- Date: 29 Dec 92 18:17:13 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: inet
- Organization: The Internet
- Lines: 19
-
- Philip,
-
- Try Bancomm Division of Datum, Inc. Their address is in the clock.txt file in
- the usual place. They were alleged to be working on such a beast, but I'm
- sure it will not be cheap.
-
- Austron makes LORAN-C timing receivers, but they cost $20K up. Cheapest thing
- known to me for submillisecond time is the Motorola MX4200, for which there
- is even an xntp3 driver. There are conflicting reports on its price, which
- I thought was in the $3K range. This is a GPS receiver.
-
- The most stable time I know, and this includes GPS, comes from a LORAN-C
- timing receiver, at least as long as the GPS wiggle machine is running, which
- is probably forever. I have built a couple of these things, which amount
- to a plug-in PC card and fancy control program. While the latest version is
- not real hard to duplicate and I do have etched PC boards, I don't recommend
- it unless there is some local talent for radio construction and alignment.
-
- Dave
-