The company's Pr cis family of time and frequency products accomplishes this by extracting time information that is accurate to within 10 microseconds from signals transmitted by CDMA cellular wireless network base stations. By contast, traditional GPS timing systems generally need outdoor, roof-mounted antennas.
Systems connected to the Internet can generally obtain time information from remote time servers.
Although there are substantial latencies in transfering data between points on the Internet, the NTP protocol provides a means to remove propagation delays. However, the best accuracy that can be obtained in this manner is on the order of 100 microseconds. Using a locally connected device such as the Pr cis can thus improve time accuracy by an order of magnitude. The products will begin shipment during Q3 of 2000. ZD Inc. All rights reserved.