Atomic clock delivers precise timing for months

Microchip Technology has introduced its 5071B cesium atomic clock, capable of autonomous time keeping with 100-ns holdover in excess of two months to counteract potential global navigation satellite system (GNSS) denials. GNSS delivers precise time and frequency across a myriad of applications including mobile phones, data centers, metrology, aviation and defense to safeguard and accurately process data. However, GNSS is susceptible to both jamming and spoofing attacks.

(Source: Microchip Technology)

The 5071B provides 100-ns holdover for more than two months so that system synchronization is maintained should GNSS signals such as GPS be denied. According to Microchip, the product, for example, enables a 5G network to be fully operational for months without GNSS.

The next-generation commercial cesium clock is a replacement for Microchip’s 5071A, which has been the primary solution for international time for more than 30 years. The 5071B matches the form, fit and functions of its predecessor, so that all connections and commands are unchanged. Internal electronics are updated with modern circuitry, including microprocessors (MPUs) for continuity of supply of components and RoHS compliance into the next decade.

The timing solution provides no deterministic frequency drift and delivers absolute frequency accuracy of 5E-13 or 500 quadrillionths over all specified environmental conditions for the product’s life.  Its stability eliminates the need for external synchronization sources prior to radiating in military applications requiring rapid deployment of system radars. In satellite communications, users can broadcast and transmit over very small frequency bands without drifting out of band.

The 5071B maintains improved synchronization for critical communication between an aircraft and control tower. Air traffic control depends on the Automatic Dependent Surveillance-Broadcast (ADS-B) and Wide Area Multilateration (WAM) to precisely locate the position of aircraft across U.S. airspace. The product’s stability delivers greater location accuracy and continued operation during GNSS outages.

The 5071B cesium atomic clock is currently available in a 3U 19-inch rackmount enclosure in two performance levels (5071B-001 and 5071B-002) and is supported by the Clockstudio Software Tool to control and monitor data. It is fully compliant with the EU RoHS directive.