... .The average frequency accuracy better than 1E-12 (continuous tracking GPS signals 24 hours later); meet the ITU-T ... , TTL level impedance: 50Ω Rising: <20ns Timing accuracy: <100ns (satellite tracking error relative to UTC time) TOD information output: 1 channel ... , time information, per 1 Display Indicator: Power, GPS, 1pps, Tracking LCD screen: year, month, day, hour and working conditions GPS ...