The punctuality of the clock server means that in the absence of an external reference source (the most typical satellite signal), the synchronization clock relies on the accuracy of the internal clock derived from the walking time. The internal clock source of the clock server can be a common voltage control on the market. Crystal oscillator, temperature compensated crystal oscillator, constant temperature crystal oscillator, rubidium atomic clock, etc. The voltage-controlled crystal oscillator is relatively the worst in timekeeping accuracy, and the price is correspondingly the cheapest. The accuracy of timekeeping is a few seconds per day. The temperature-compensated crystal oscillator is slightly better than the voltage-controlled crystal oscillator, and the error is 1s/ Today, the constant temperature crystal oscillator is slightly more expensive than the temperature compensated crystal oscillator. The indicator is 4ms/day, and the rubidium clock is more expensive than the constant temperature crystal oscillator. The punctual index of the rubidium clock is 5ms/year. Customers can choose the built-in according to the actual application environment requirements of the user. The clock source is not the more expensive the better, the right one is the best.
