If the time frequency of the phone case is correct, the stability of the oscillator

If the time frequency of the phone case is correct, the stability of the oscillator The exact time on your phone-technology blog
Usually, you find that when you arrive late in a place (such as a train), the clock in your phone will lag behind. In the 22nd century, it is unacceptable if the watch is faster or more than a minute behind.
If there are no complaints about the watch, the smartphone only needs to display the accurate time. However, as practice shows, this is not always the case. The clock on the phone is the same as the old clock of the Barwick agroturismo oktaf grandmother in my village.

First, the tuning accuracy and stability of the crystal oscillator (resonator). The frequency accuracy and stability of the latter is usually 11-6. Ideally, with this value, the clock can run a little more than 31 seconds per year.
In fact, since the frequency of the resonator is affected by environmental parameters (temperature, pressure) and the power supply voltage of the generator, the stability is slightly worse. Generators also include other components, such as capacitors, whose parameters depend more on external influences. As a result, the clock can run up to 31 seconds per month. In professional equipment, such as satellite TV transmitting and receiving equipment, the stability of the generator is much higher, which can reach a value of 11-13. Therefore, one method suggests that you use the carrier frequency of the external signal source as a reference. And use it as a reference for our generator. There are two methods: hardware and software. In the first case, adjust the clock generator frequency to the carrier frequency of the transmission tower. In the second case, the basic tower transmits a time signal and the operating system adjusts the clock.
However, as the domestic reality shows, cellular operators have no hope. I have encountered a situation where the clock time has skipped a few hours a few times. Then, I had to disable the option to use data provided by the network. Since smartphones are computers that can be accessed, the easiest way is to synchronize the clock with a reference time server. This function is not available in standard firmware. But the problem was solved by installing other software. There are a few such programs, I like one-from :-). This program is useful if the cellular phone operator does not support (automatic time synchronization) or sends incorrect values, and the phone clock is running before or after. Automatic synchronization only works on phones with. -If there is no right, the time check will be performed automatically, and if the clock is severely used up, you will be notified. And you will have to synchronize the clock.

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