Automatic test method and system for receiving sensitivity of interrogator based on counter

Abstract

The invention discloses an automatic test method and system for the receiving sensitivity of an interrogation machine based on a counter, comprising: a control unit setting the frequency point to be tested of the IFF interrogation machine; The frequency points to be tested of the IFF interrogator match; the control unit controls the IFF interrogator to work in the inquiring state, and the signal source simulator receives the signal and responds; the inquiry pulse and decoding are performed through the two counting channels of the counter board The pulses are counted and the interrogation probability is calculated. When the interrogation probability is not lower than the index requirement of the IFF interrogator, the attenuation of the programmable attenuator is increased until the interrogation probability is lower than the index requirement of the IFF interrogator. The invention adopts the counter to count the quantity of the inquiry trigger pulse and the decoding mark pulse, realizes the automatic test of the inquiry probability; adopts the method of accurate counting, and improves the test precision.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to an automatic testing method and system for receiving sensitivity of an interrogator based on a counter. Background technique [0002] IFF is an indispensable device in modern air defense and coastal defense systems, including IFF transponders and IFF interrogators. Among them, IFF interrogators are mainly equipped on weapons systems such as ships and field tactical radars. Cooperating with it can complete the precise positioning of the target and the identification of friend and foe. [0003] In order to measure the performance index of the IFF interrogation machine, it is necessary to conduct accurate tests on the indicators such as transmission power, transmission frequency, and receiver decoding sensitivity. Among them, traditional microwave parameters such as transmission power and transmission frequency can be accurately tested by microwave instruments and equipment on the ...

AI Technical Summary

Problems solved by technology

[0005] At present, the method of testing the decoding sensitivity of the IFF interrogation machine receiver is manual testing, which has low test efficiency and cannot meet the needs of mass production testing. At the same time, it is used to observe the density of the two groups of pulse numbers on the oscilloscope screen and rely on rough experience. Although the method of estimating the interrogation probability can solve the problem of testing the decoding sensitivity of the receiver of the IFF interrogator to a certain extent, this method is very inaccurate in a strict sense, and it mainly relies on the experience of the test engineer, so it cannot form a unified standard. Test engineers may have very different test results, which will also bring certain uncertainty to the quality of the product

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