[ntp:questions] GPS clock for Linux

Steve Kostecke kostecke at ntp.org
Fri Sep 12 02:19:41 UTC 2008

On 2008-09-12, rochertov at gmail.com <rochertov at gmail.com> wrote:

> On Sep 11, 4:54 pm, (Hal Murray) wrote:
>> >   I am interested in getting a GPS clock to synchronize our
>> >internal test network. I am curious to hear about relativley cheap
>> >and Linux friendly GPS clock. (Less than $100 would be great)


Any timing GPS which ouputs NMEA sentences and a PPS signal is supported
by the Generic NMEA driver in ntpd. You do need to have LinuxPPS support
in your kernel or use a helper such as gpsd.

If you want a drop-in solution you'll need something like


>> The Garmin GPS 18 LVC is popular. "Some assembly required."
>> (aka soldering) No big deal if somebody has a soldering
>> iron handy. There are a couple of links from here:
>> http://support.ntp.org/bin/view/Support/InexpensiveOemGps
> Thanks. Although, I would prefer something to be just ready to go, as
> we have a paper deadline coming up.

The GPS 18 LVC costs less than $70. Add to that the time for someone to
work out the wiring and solder up the connector (well under an hour for
a competant tech).

Any other solution is likely to cost more.

Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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