... , holding 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 the ... code 4, XS8 three core plug AirlinesSerial interface, GPS status, system information GPS raw data interface, 1, DB-9 ,9600-N ...