... automatically switch to keep Detailed Product DescriptionGPS Rubidium Clock System tames rubidium clock to the cesium atomic clock in the ... GPS satellite clock signal.CC81231(GPS Rubidium Clock System) tames rubidium clock to the cesium atomic clock in ... -1 System Monitoring Interface, 1, DB-9 ,9600-N-8-1Network Interface 1 Road, RJ45, provides NTP network time and network monitoring system