... signal without calibration.CC86131’s clock is trace to GPS/LONASS/BEIDOU satellite’s cesium atomic clock. The output ... accuracy better than 1E-12P High reliability, high redundancy; GPS, GLONASS, BEIDOU offer reference clock Built-in high performance ... and other agreements Display Indicator: Power, GPS, Compass, GLONASS, rubidium clocks, to maintain, fault LCD display: year, month, day, hour ...