CDMA-Based Timing Solutions

The new Praecis products are low-cost, CDMA-based timing products. Like cellular telephones, the solutions operate reliably inside buildings. Traditional GPS timing systems need rooftop-mounted antennas. These products solve this problem with a small antenna mounted directly on the unit.

The product line uses the existing CDMA wireless infrastructure, whose system timing is slaved to GPS, to precisely synchronize itself to UTC. In effect, the CDMA base stations serve as GPS "repeaters". Praecis can establish UTC time to the 10-microsecond level of accuracy. The frequency output is highly stable, comparable to direct GPS, and it matches UTC to less than 10-11.

Praecis comes in three versions. The Praecis Ct operates as a low-cost timing source for the synchronization of network servers. It offers drop-in compatibility with Unix/Linux and Windows NT servers, using existing public-domain NTP software. The Praecis Cf provides both a 1 pulse-per-second and a precision 10 MHz standard frequency for users requiring an accurate, low-cost, convenient time and frequency source. Finally, the Praecis Ce is available for OEM customers who need a small circuit board for embedded applications.

EndRun Technologies, 520 Mendocino Avenue #380, Santa Rosa, , US, 95401. Tel: 877-749-3878; Fax: 707-573-8633.