Now the mainstream clock server price in the market is generally from several hundred to several thousand, or even up to tens of thousands of yuan. Most customers do not know the reason. They just feel the same time function. How the price difference is so big, actually the function is different. The specific price is based on the external reference source that the time server can receive, the internal clock source, and the output time service. Signal types, timing signals, timing accuracy and other factors are determined.

There are two main types of Internet time service, one is NTP time service, the other is PTP time service.

NTP overview:

The NTP protocol is a network time synchronization protocol. The function of NTP is to synchronize the time of computer, webcam, NVR and server to a certain standard time. The time standard adopted at present is the UTC time at the time of world coordination. In China, the standard time in Beijing is commonly used. The NTP protocol generally gives time to computers, webcam, NVR, servers and other equipment, so as to achieve the same effect of time. The NTP network time server is commonly seen in the market.

PTP overview:

PTP timing protocol is a kind of master-slave synchronization system which is seldom used in the market. It carries out network coding for time information, and realizes synchronization between master and slave time by using network symmetry and delay measurement technology. To achieve such a function, the master clock and the clock should be used together. PTP clock equipment is commonly used in military, research institutes, universities and other scientific research units.

The difference between NTP and PTP is:

The timing accuracy is different: NTP is MS and PTP is ns.

The hardware composition is different: the NTP system is usually made up of NTP time server and client device, and the client (computer, webcam, NVR, server and other equipment) can generally receive NTP protocol. PTP is usually composed of the master time server and the time server and the client, because the PTP protocol is not directly used by many clients, so PTP must be added from the clock.

The cost is different: NTP cost is low, PTP cost is relatively high.

Satellite distinction

The receiver types of the clock server are also divided into the following satellite modes:

(a) GPS system time

(b) GLONASS system time

(c) Beidou system time

Different satellite signals also seriously affect the price of this clock server.

Punctual accuracy affects prices

The clock server's punctuality means that when there is no external reference source (the most typical satellite signal), the synchronization clock depends on the timing of the internal clock source. The clock source of the clock server can select voltage controlled crystal oscillator, temperature compensation crystal oscillator, constant temperature crystal oscillator, rubidium atomic clock in the market. Voltage controlled crystal oscillator is relatively the worst time, the price is also the cheapest, the time accuracy is a few seconds a day, the temperature compensation crystal oscillator than the voltage controlled crystal oscillator timing accuracy is slightly better, the error is 1s/ days, the constant temperature crystal oscillator will be slightly more expensive than the temperature compensated crystal oscillator, 4ms/ days, the rubidium clock will be more expensive than the constant temperature crystal oscillator, the rubidium clock punctuality indicator is 5ms/ years, customers can root. According to the user's actual application environment requirements, choose the built-in clock source, not the more expensive the better, the right is the best.

Throughput

Our company has artificial intelligence automatic placement machine, wave crest reflow soldering machine, forming an automatic standard production line, so that we can mass production and processing products, improve efficiency and reduce the problem of false welding and leakage welding due to manual welding.

The difference between NTP and SNTP

SNTP is a subset of NTP, and can not really replace NTP. SNTP simply simplifies some of NTP's processes, so that costs can be saved. But it can only synchronize some simple devices, such as computers, and can choose to use SNTP to synchronize. However, some high-end devices such as servers and camera heads can't use SNTP to give time.

Testing ability

The test also includes: constant temperature and humidity test box, vibration impact stage, cesium atomic frequency standard. Cesium atomic frequency standard is higher than that of rubidium atomic frequency standard. According to professional metrology, the equipment can only be calibrated / calibrated by a higher level equipment. Therefore, it is necessary to produce a set of cesium atomic frequency standard when producing rubidium atomic frequency standard source.

R & D capability

Since its establishment, the company has developed NTP timing module, NTP core card, GPS timing clock, PTP core module, day difference detector, time relay tester, phase meter, frequency stability tester and so on. Every time there will be a new product on time and frequency.

Scientific research ability is the core strength of an enterprise. Our company has a professional R & D team and works together with Xi'an University of Posts and Telecommunications to develop new products together. In cooperation with Xi'an University of Posts and Telecommunications, Xi'an University of Posts and Telecommunications is also an important repository of talents for our company, providing excellent scientific and technological talents for synchronous technology.

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