Beidou Bontec helps the General Administration of Radio, Film and Television to complete the whole network of Beidou satellite timing
Beidou Bontec helps the General Administration of Radio, Film and Television to complete the whole network of Beidou satellite timing
Today, Beidou Bontec, a professional Beidou time and frequency equipment solution provider, has successfully completed the Beidou network time synchronization project of the State Administration of Press, Publication, Radio, Film and Television of the People's Republic of China, realizing the high-precision time synchronization of the multi-service system of the whole network.
Detailed description
T600-BDOCXO NTP network time server innovatively integrates seamless switching technology of reference source, high-precision time interval measurement TIC technology and adaptive precision frequency measurement and control technology. It adopts modularized design and consists of BeiDou receiver, GPS receiver, high-performance industrial-grade motherboard, human-machine interface and monitoring management unit, local clock taming unit, output interface module and power supply module.
The core of T600-BDOCXO NTP network time server consists of 64-bit high-performance CPU, high-speed FPGA and high-stability oscillator (rubidium atomic clock or OCXO), and adopts Linux for multi-task real-time parallel processing and scheduling. The system can simultaneously receive the second synchronization and time information sent by BeiDou, GPS and network time messages that meet the NTP/SNTP protocol, and automatically selects the external time reference signal as the synchronization source according to the priority level and leads the control to the locked state (LOCKED). With input transmission delay compensation algorithm, using Kalman digital filtering technology to filter out the jitter of the external time reference signal, rubidium atomic clock or OCXO control and taming, frequency division by the internal oscillator to get 1PPS signal, so that the output of the 1PPS signal synchronized to the external time reference output of the 1PPS signal of the long-term stability of the value, to overcome the external time reference of the second pulse signal jumps brought about by the impact of the output time signal, so that the time of the external time reference signal jumps. Overcome the influence of the external time reference's second pulse signal jumping, make the output time signal not only keep synchronization with the external time reference signal but also more stable. When the external time reference signal is lost, it enters into the HOLD-OVER state, and when the external time reference signal is restored, it automatically ends the HOLD-OVER state and traces to the LOCK-OVER state. Thus, it outputs uninterrupted time information synchronized with UTC.
