A frequency sweep intermodulation distortion testing system and method

Abstract

The invention discloses a frequency-sweeping inter-modulation distortion testing system and method, and belongs to the technical field of the testing. The system comprises an inter-modulation distortion parameter analysis unit, an inter-modulation distortion scanning control unit, an inter-modulation distortion data processing unit and an inter-modulation distortion calibration unit. The inventionprovides a fast multi-source frequency-sweeping inter-modulation distortion testing method. The method comprises the following steps: integrating an inter-modulation parameter receiver frequency-sweeping range, acquiring a testing result satisfying a condition parameter when the scanning processing range meets a parameter operation demand; integrating network instrument scanning control accordingto the parameter when a user measures multiple inter-modulation parameters, thereby enabling the user to fast acquire a measurement result; and acquiring an accurate inter-modulation power output andreceiver measurement result by using the source of a vector network analyzer and receiver calibration and SOLT calibration method, wherein the measurement accuracy degree of the inter-modulation distortion parameter is improved.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a frequency-sweeping intermodulation distortion testing system and method. Background technique [0002] With the increase of modulation types in microwave communication systems, the testing requirements for devices such as amplifiers and mixers are more stringent. In addition to the basic equal-amplitude linear characteristic test, frequency converters, amplifiers, etc. also need to test nonlinear characteristics under large signal conditions: harmonic characteristics, second-order intercept point, third-order intercept point and other intermodulation distortion component tests. Traditionally, two sources and a spectrum analyzer are required to measure intermodulation distortion. The signal source is controlled by program to generate the required two-tone excitation signal, and then the spectrum analyzer is controlled to analyze the intermodulation frequency spectrum...

AI Technical Summary

Problems solved by technology

This test method not only requires multiple instruments, but also requires the user to perform program control and subsequent data processing, resulting in cumbersome work and low measurement efficiency

[0003] Using multiple instruments to test the same device, not only the test cost is high, the test efficiency is low, but the test data integration of multiple instruments also increases the test complexity and test difficulty; the intermodulation distortion test function provided by the current vector network analyzer, Using a single-parameter scanning method leads to low test efficiency

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