Signal analysis interface intelligent matching method based on switching matrix

Abstract

The invention provides a signal analysis interface intelligent matching method based on a switching matrix. Low-frequency signal test matching is automatically achieved as a hardware matrix switch is combined with software to perform pre-judgment and control; according to the requirement of a tested signal, hardware includes multiple multiplex switches, single-pole single-throws, double-pole double-throws and the like is involved in forming the switching matrix so as to achieve the aim of increasing or decreasing the number of tesingt ports and later-class analysis channels and realize the function of multiple-parameter measurement on a single-path signal and on a multi-path signal. The tested signal undergoes rough testing and comparison, finally, the automatic identification function of a coupling manner and a measuring range is achieved and a signal channel is automatically divided. According to the signal analysis interface intelligent matching method based on the switching matrix, a matrix switch and the concept of intelligent control are introduced, hardware resources can be saved and in addition, the testing ports can be flexibly expanded. The testing function is added, the automatic identification function of multiple coupling manners, multiple kinds of impedance and multiple kinds of measurement ranges can be realized and design is flexible.

Description

technical field [0001] The invention belongs to the field of communication testing, in particular to an intelligent matching method for a signal analysis interface based on a switch matrix. Background technique [0002] In the field of low-frequency signal analysis, there are many types of signals to be tested, the coupling methods are divided into DC and AC, the amplitude ranges from a few mV to tens of V, and the matching impedance ranges from 50Ω to high impedance. Therefore, in order to adapt to different signals Features, to simplify the post-stage analysis circuit, it is necessary to design a variety of signal interface devices to match different impedances, ranges and receiving channel settings. [0003] In the current circuit design of traditional single instruments such as audio meters, oscilloscopes or digital voltmeters, there are few types of impedance matching. The test mainly adopts the concept of user-oriented interaction, and the user estimates the characteri...

AI Technical Summary

Problems solved by technology

[0004] 1) There are few types of impedance settings for traditional single instruments, and the appropriate impedance cannot be selected according to the requirements of the measured signal, which affects the correctness of subsequent measurement results;

[0005] 2) In the range selection, the user often needs to manually connect to the corresponding port or switch the range according to the guessed signal size, which cannot meet the flexible test needs of a wide range of unknown low-frequency signal analysis

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