Automatic temperature-frequency characteristic measuring instrument for thermostatic crystal oscillators

Abstract

The invention relates to an automatic temperature-frequency characteristic measuring instrument for thermostatic crystal oscillators, which comprises a high-low temperature chamber, a high-power linear power source, frequency transmission and conversion modules and a frequency measuring meter. The high-low temperature chamber is connected with an industrial computer through a network cable to receive orders sent by the industrial computer and set different test temperatures. The high-power linear power source is electrically connected with a crystal oscillator test board through a power line. Each frequency transmission and conversion module is connected with the industrial computer through a parallel connecting wire, a transmission port of each frequency transmission and conversion module is connected with a corresponding port of a test socket through a coaxial cable to receive orders sent by the industrial computer and control on and off of the transmission ports. The frequency measuring meter is connected with the frequency transmission and conversion modules through a coaxial cable and further connected with the industrial computer through a GPIB (general purpose interface bus) to transmit frequency data to the industrial computer. The automatic temperature-frequency characteristic measuring instrument has the advantages that measurement is quick and fully automatic, sixty-four thermostatic crystal oscillators can be measured simultaneously, measurement accuracy rate is higher than 99%, and further, no labor is occupied and manual intervention is completely avoided.

Description

technical field [0001] The invention relates to an automatic measuring instrument, in particular to a device for batch measurement of temperature-frequency characteristics in batch production of constant temperature crystal oscillators. Background technique [0002] Oven-controlled crystal oscillator (OCXO for short) 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 OCXO is quite difficult. At present, more than 80% of domestic OCXO relies on imports. This is because more than 90% of OCXO production is for the measurement and debugging of product parameters. The difficulty of mass production of OCXO lies in automation and mass production. parameter measurement test. [0003] Since the main component of the OCXO, the quartz crystal, is very sensitive to temperature, when the temperature changes, whether the ...

AI Technical Summary

Problems solved by technology

Depending on the product environment, a test generally takes 3 to 5 hours. During the test period, employees are required to participate all the time, which takes up manpower, and due to manual operation, it causes low efficiency, high error rate, and poor consistency of product parameters.

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