[ntp:questions] Re: Looking for time sync hardware supported under Linux for under $400?

Terje Mathisen terje.mathisen at hda.hydro.com
Wed Jan 18 21:28:26 UTC 2006


Mark Hansen wrote:
> Thanks. I found that Garmin sells a PC version of this receiver,
> which is made to plug into the serial port, so no adapters/converters
> are necessary. Here's a link to someone that sells it:
> 
> <http://www.starlite-intl.com/Detail.asp?pid=1233&Key=>

This version is totally useless for your purpose: It is missing the PPS
signal!

You _must_ buy the LVC (bare wires) version instead. Quoting from the
linked page:

> The LVC version additionally provides a pulse-per-second logic level
> output whose rising edge is aligned to the UTC second within 1
> microsecond.

You must have this, as the bare NMEA signal barely work at all as a
refclock.

Terje

-- 
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"




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