On Mon, Jun 27, 2011 at 10:35 PM, David J Taylor <[email protected]> wrote: > "Richard B. Gilbert" <[email protected]> wrote in message > news:[email protected]... > [] >> >> The best source of time IMHO is a GPS Timing Receiver. Note that GPS >> Receivers can also be designed for navigation. For timing service you >> should take care to get a receiver designed for the purpose! Either kind >> necessarily knows what time it is but a receiver designed for Navigation is >> concerned with latitude, longitude, and elevation and delivering this >> information. Delivering accurate time is its lowest priority. > > There is one low-cost GPS receiver board available from China, and its use > with NTP is described here: >
The Chinese GPS is not bad and the price is only about $35 But for not much more money you can get a nearly state of the art unit that is made and supported by a US company. Synergy will selll you an M12M Timing GPS Receiver for about $60. Look at the specs on the PDF sheet. This is gross overkill for NTP but some people use GPS for other purposes http://www.synergy-gps.com/index.php?option=com_content&task=blogcategory&id=32&Itemid=116 You can get older M12+T units from eBay for about $30 but the much better performance, US based tech suport, warenty and better documentation is maybe worth the price. Chris Albertson Redondo Beach, California _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
