Automation measuring apparatus for crystal oscillator parameters

Abstract

The invention relates to an automation measuring apparatus for crystal oscillator parameters, which is characterized by comprising a test socket, a digital multimeter, a frequency measuring apparatus, a digital oscilloscope, a digital controlled source and an industrial automation control computer, wherein a test socket pin used for connecting an output end of a crystal oscillator to be tested is connected with a test probe of an input end of the digital oscilloscope, a power supply pin of the test socket is connected with an input end of the digital multimeter through power supply wires, an output end of the digital multimeter is connected with an input end of the digital controlled source through the power supply wires, an output end of the digital controlled source is connected with the power supply pin of the test socket through the power supply wires, an output end of the digital oscilloscope is connected with an input end of the frequency measuring apparatus through coaxial cables, the digital oscilloscope can send frequency signals of the crystal oscillator to the frequency measuring apparatus; and the industrial automation control computer is connected with the test socket, the digital multimeter, the frequency measuring apparatus, the digital controlled source and the digital oscilloscope in series mode through a general purpose interface bus (GPIB) wire. The functions of the digital multimeter, the digital oscilloscope and the frequency measuring apparatus are integrated, the accuracy of the measurement is increased, and the time for measurement is greatly shortened.

Description

technical field [0001] The invention relates to an automatic measuring instrument, in particular to equipment for accurately measuring various parameters of the crystal oscillator in the production of the crystal oscillator. Background technique [0002] Crystal oscillator is a frequency reference product and a high-precision electronic device, which is widely used in 3G communications, military, high-end instruments and other places that require very high time accuracy. The production of crystal oscillators is quite difficult. At present, more than 80% of domestic crystal oscillators rely on imports. This is because more than 90% of the production of crystal oscillators is for the measurement and debugging of product parameters, while crystal oscillators are produced in batches. The difficulty lies in the automation and batch parameter measurement and testing. [0003] There are about 30 important parameters of the crystal oscillator. The measurement of many parameters req...

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Problems solved by technology

[0003] There are about 30 important parameters of the crystal oscillator. The measurement of many parameters requires modification of the external environment such as voltage and load. After the modification, it needs to wait for stability, and it is necessary to calculate a large amount of measurement data to obtain the value of each parameter. , very time-consuming and error-prone, parameter measurement has become a key step in the production of crystal oscillators that affects yield

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