This article mainly talks about the function of the PTP main clock. Through the basic principle of PTP timing, it gives a simple explanation of the main clock and the basic link from the clock. At the same time, it expounds the particularity of the PTP main clock in the application of the system, so that users can have more solutions to PTP timing and PTP master clock.

PTP time service generally refers to sending the time message periodically in the same network system, sending the synchronization message from the clock to the main clock, and sending the delay request message to the master clock randomly, and then adjusting the same step deviation of the clock through a specific synchronization algorithm. The PTP clock also has a relatively high accuracy compared with the commonly used NTP timing, because it can adjust the synchronization error of its own clock, and the PTP protocol is the precise network time service protocol.

According to the basic principle of PTP time service, we can see that the PTP time service is mainly composed of two device systems, that is, PTP master clock and PTP slave clock. The PTP master clock is used as the main clock source in the PTP timing system. It generates standard PTP time information after being processed internally and converted to some time information obtained from the outside world or generated by itself. Because of the high accuracy of its own protocol, the PTP protocol usually obtains the time source from outside and does not choose its own time protocol, because the accuracy of the time information produced by most of the devices is more direct than that of the PTP time conversion. At the same time, the IEEE11588V2 protocol referred to in the PTP protocol, which is currently used in the industrial environment, refers to all the PTP clock correlation mentioned in this paper, all of which refer to the IEEE1588V2 protocol.

PTP master clock is a device that generates PTP timing protocol. In the standard networking system, the PTP timing protocol provided by the master clock is usually transmitted directly to PTP from the clock device. The relationship between PTP and the PTP master clock is equal to that of the upper and lower transmission links. The PTP time protocol received from the clock is consistent with the time protocol issued by the PTP master clock PTP. PTP, after receiving the time information sent by the PTP master clock from the clock, the PTP time information is converted to the application of the specific time protocol applied to the time synchronization of the system through the self processing through the system requirements.

At present, PTP main clock equipment mainly has SYN2401 type PTP main clock and SYN2411 type PTP precision master clock. The two main PTP clock devices are mainly output PTP network timing protocol, satisfying client capacity, timing accuracy and built-in time source. The SYN2411 PTP precision master clock has higher relative accuracy. It meets the 10/100/1000M adaptive network. The standard built-in constant temperature economic detection can select the PTP master clock function of the Rb Atomic Clock Lock equal time service system.

Due to its high accuracy compared with other timing requirements, the PTP master clock is widely used in aerospace and military technology, including the current 5G construction application of PTP protocol time synchronization technology. Our company's PTP clock system products are supplied to major universities for research and development of PTP time synchronization technology in our country. For customers who want to know more about the PTP master clock, please consult our company's business people.

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