Timing system block diagram
High-tech clock products with high precision, large capacity and high quality. The equipment adopts redundant architecture design, and the high-precision clock comes directly from the atomic clocks of all satellites in Beidou and GPS systems. Tame the local clock source through signal analysis, and realize the accurate maintenance function of the local clock after the satellite signal is lost. Unique embedded hardware design, efficient Linux operating system, flexible expansion of a variety of clock signal output. Fully support the latest NTP time synchronization protocol, MD5 security encryption protocol and certificate encryption protocol, and the time accuracy is better than 2 ms.. At the same time, it supports the functions of TOD, 10MHz, 1PPS, log, USB port upgrade download and dry contact alarm, and cooperates with the unified monitoring software of the whole network time to easily realize network time synchronization and effective monitoring.
Jingzhun electronic technology HR-90 1GB GPS time server can be widely used in medical care, security, finance and insurance, mobile communication, cloud computing, e-commerce, energy and electricity, petroleum and petrochemical, industrial automation, intelligent transportation, smart city, Internet of Things and other fields.
system structure
Precision electronic technology HR-90 1GB GPS time server innovatively combines seamless switching technology of reference sources, high-precision time interval measurement TIC technology and adaptive precision frequency measurement and control technology. It adopts modular design and consists of Beidou receiver, GPS receiver, high-performance industrial motherboard, man-machine interface and monitoring management unit, local clock taming unit, output interface module and power supply module.
The core of HR-90 1GB GPS timing server for precision electronic technology is composed of 64-bit high-performance CPU, high-speed FPGA and high-stability oscillator (rubidium atomic clock or OCXO), and Linux is used for multi-task real-time parallel processing and scheduling. ?
The system can receive the second synchronization and time information sent by Beidou and GPS and the network time message meeting NTP/SNTP protocol at the same time, and automatically select the external time reference signal as the synchronization source according to the priority and guide it into the locked state. It has an input transmission delay compensation algorithm, and uses Kalman digital filtering technology to filter out the jitter of external time reference signal, so as to control the taming of rubidium atomic clock or OCXO. The 1PPS signal is obtained by frequency division of the internal oscillator, so that the output 1PPS signal is synchronized with the long-term stable value of the 1PPS signal output by the external time reference, which overcomes the influence caused by the jump of the external time reference second pulse signal and makes the output time signal not only synchronized with the external time reference signal, but also more stable. When the external time reference signal is lost, it will enter the holding state, and when the external time reference signal is restored, it will automatically end the holding state and pull and track to the locking state. So as to continuously output time information synchronized with UTC.
Important characteristics
+Ultra-high bandwidth NTP server?
+GPS/ Beidou Double Reference Source Level 1 Clock Server
+High-performance industrial motherboard and embedded Linux operating system
+Provide 6 independent10/100/1000 mbs network interfaces.
+You can connect another NTP server to form a level 2 clock.
+Optional internal precision clock OCXO or rubidium atomic clock.
+Secure and efficient network user interface
+Support SSH, SSL, SCP, SNMP, CustomMIB, HTTPS, Telnet and other protocols.
+Compatible with IPv6 and IPv4 protocols.
+The relative UTC time accuracy reaches nanosecond level.
+Support the output of SysPlex time information required by IBM host.
+Support single satellite time service function in fixed position mode.
+VFD HD vacuum fluorescent display screen
+Reliability MTBF up to 80,000 hours
+Support 4000 log function.
+Support remote wake-up and timing switch.
+Support MD5 encryption protocol
+Support certificate encryption protocol
+Support dry contact alarm function