Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!eplrx7!esds09.es.dupont.com!butler
From: butler@esds09.es.dupont.com (butler)
Newsgroups: comp.protocols.time.ntp
Subject: An exercise left for the reader...
Message-ID: <1991Apr10.115547@esds09.es.dupont.com>
Date: 10 Apr 91 15:55:47 GMT
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Reply-To: butler@esds09.es.dupont.com (butler)
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Nntp-Posting-Host: 138.196.90.50

We have a Spectracom 8170 clock that we would like to use to set the time for
our local net.  I've gotten the XNTP distribution from louie.udel.edu and have
looked at the refclock_wwvb driver.  The comment section at the beginning of the
file contains the following statement:

	"To do this you need to make a device consisting of a one-shot (74123 or
similar) to
	 shorten the pulse to something that can pass for a 19200 bps character, and an
MC1488
	 or equivalent to convert to RS232 signal levels." 

Can someone send me (or tell me where to find) a schematic for such a device? 

In addition, if anyone has practical advice about getting this code running
under ULTRIX 4.1 on a DECstation 5000 I would appreciate it.  I'm pretty new to
the UN*X world.

Thanks

R. Scott Butler
E. I. duPont
Box 80320
Wilmington, DE 19880-0320
Phone (302)695-4522
FAX  (302)695-9658
butler%esvax@dupont.com
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