A method capable of automatically setting parameters of a high-stable oven-controlled crystal oscillator

Abstract

The invention discloses a method capable of automatically setting the parameters of a high-stable constant-temperature crystal oscillator, comprising: a peripheral computer C judges the central voltage control voltage V and Whether the voltage control slope K has been set with a mark; if the V and K of R are not set with a mark, the processor will automatically count the time and wait for the high-stable constant temperature crystal oscillator to warm up for a certain period of time, and after the stability reaches the target, it will preheat through the digital-to-analog converter Set the low voltage value V0 of the voltage control range, the processor reads the accumulated phase value N0 for a certain period of time after the logic phase detection, and then determines the frequency f0; then preset the high voltage value V1 of the voltage control range, and the processor reads a certain N1 of the time, get f1; read N0 and N1, combined with the frequency determination information, to get K and V of the high-stable constant temperature crystal oscillator; write K and V into R, and mark the successful setting. The invention solves the disadvantage of cumbersome operation of setting a high-stable constant-temperature crystal oscillator, and realizes the automatic control setting process.

Description

technical field [0001] The invention relates to a method for automatically setting parameters of a crystal oscillator, in particular to a method for automatically setting parameters of a high-stable constant temperature crystal oscillator (Oven Controlled Crystal Oscillator, OCXO). Background technique [0002] High-stability constant temperature crystal oscillators and crystal oscillators with comparable performance are used as local time-frequency sources and are widely used in various communication products and equipment. In general, high-stable constant-temperature crystal oscillators have many indicators to represent their performance in order to accurately reflect their operation control process. In actual production, it is generally necessary to detect the traction range and voltage control slope index in the voltage control characteristics, and use these data to search for a suitable central voltage control voltage, so that the single board can be quickly controlled ...

AI Technical Summary

Problems solved by technology

[0003]The main disadvantages of this traditional approach are:

[0004]First, frequency meters, GPIB cards, advanced time-frequency sources (such as cesium clocks) and other instruments are required, which is not convenient for production and cheap implementation;

[0005]Second, it is necessary to connect the reference cable, GPIB cable, serial port cable and output signal cable of the crystal to be tested, etc. The operation is cumbersome and impractical, and it is difficult to understand the operation if you are not familiar with the configuration;

[0006]Third, the high-stable constant temperature crystal oscillator needs to be preheated by an external process or manual control is not suitable for mass production;

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