Frequency monitoring system and frequency monitoring method for crystal oscillator

A technology for crystal oscillators and monitoring systems, applied in the direction of frequency measurement devices, etc., can solve the problems of continuous measurement and discontinuity of crystal oscillators that are difficult to meet, and achieve the effect of improving the reliability of the whole machine and improving performance indicators

Inactive Publication Date: 2018-05-15
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current frequency measurement equipment can only measure the frequency of the crystal oscillator discontinuously at a specific temperature point, and it is difficult to meet the needs of continuous measurement of the frequency of the crystal oscillator by the model equipment under variable temperature conditions

Method used

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  • Frequency monitoring system and frequency monitoring method for crystal oscillator
  • Frequency monitoring system and frequency monitoring method for crystal oscillator
  • Frequency monitoring system and frequency monitoring method for crystal oscillator

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Embodiment Construction

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0032] According to GJB1648 "General Specification for Crystal Oscillators", the frequency stability of variable temperature test refers to "the oscillator should be stabilized at the lowest specified temperature. After stabilization, record the first frequency and temperature. Then, gradually increase the temperature according to the regulation...

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Abstract

The invention discloses a frequency monitoring system and a frequency monitoring method for a crystal oscillator. The system comprises a main control unit. The main control unit is connected with a frequency counting unit, a temperature changing unit and a power supply unit. The frequency counting unit is connected with a test unit. The main control unit is used for outputting control parameters to all connection equipment. The temperature changing unit is used for providing a temperature changing condition for a to-be-monitored oscillator under the control of test temperature cycling parameters output by the main control unit. The power supply unit is used for providing a test voltage for the test unit. The test unit is used for monitoring the frequency of the to-be-monitored oscillator in the temperature changing condition. The frequency counting unit is used for detecting the real-time frequency parameters of the to-be-monitored oscillator in the test unit and feeding back the real-time frequency parameters to the main control unit. The main control unit calculates the jump amount of the frequency. When the jump amount of the frequency reaches a limit value, the frequency counting unit is triggered to count the frequency. Therefore, the continuous frequency monitoring of the crystal oscillator in the temperature changing condition is realized.

Description

technical field [0001] The invention relates to the technical field of frequency monitoring of crystal oscillators, in particular to a monitoring system and a monitoring method for continuous frequency monitoring of crystal oscillators under variable temperature conditions. Background technique [0002] Since the internal stress of the crystal oscillator has a great relationship with the external temperature, under certain temperature conditions, the internal stress of the crystal oscillator may change abruptly, causing a sudden jump in frequency. For loops with high frequency stability requirements, such a sudden jump is likely to cause the loop to lose lock, thereby leading to system failure. Therefore, for a device with high frequency stability requirements, it is necessary to continuously measure the change of its frequency within its operating temperature range, which requires continuous and rapid measurement of the frequency of the device. [0003] The current frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 睢建平李国强潘立虎郑文强叶林崔巍段友峰张磊哈斯图亚刘小光王作雨
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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