Second pulse-accuracy self-measurement method

Abstract

The invention provides a second pulse-accuracy self-measurement method. The method includes the following steps that: the same second pulse source is adopted to input second pulses to all tested devices; time difference between the reference second pulse signals of the tested devices and second pulse signals outputted by satellite navigation modules is measured, so that a first time difference information measurement value is obtained; time difference between the reference second pulse signals of the tested devices and second pulse signals inputted from the outside is measured, so that a second time difference information measurement value is obtained; and two tested devices which normally communicate with each other output their respective first time difference information measurement values and the second time difference information measurement values, with time delay for the same second pulse source to arrive at the two tested devices considered, second pulse time difference betweenthe satellite navigation modules of the two tested devices is calculated. According to the second pulse-accuracy self-measurement method of the invention, an oscilloscope and special devices are notneeded to measure second pulse time difference, and only measurement values of the devices during the work process of the inner functions of the devices and the measurement values of the external signals are adopted.

Description

technical field [0001] The invention relates to a measurement technology of synchronous timing accuracy in a communication system. Background technique [0002] The second pulse is used as a signal representing the time accuracy in communication equipment. When the accuracy of the second pulse of multiple devices needs to be measured, the time difference between every two second pulses can be measured, and the time difference can be used to indicate the accuracy of the second pulse. In the current application environment, there are mainly two methods for measuring the time difference between devices. One is to use an oscilloscope to directly measure the second pulse signal and read the displayed value of the oscilloscope to complete the measurement of the second pulse time difference; the other is to use special equipment to communicate The second pulse signal of the equipment is connected to the special equipment, and the special equipment completes the time difference meas...

AI Technical Summary

Problems solved by technology

These two methods have limitations. When using an oscilloscope to measure manually, it is not easy to operate. Especially in the case of more equipment, the complexity of the operation will increase exponentially; when using special equipment, the number of interfaces of external equipment and Accuracy will affect the actual measurement process. When there are many test equipments, the number of special equipments will be increased.

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