A frequency sweep intermodulation distortion testing system and method

A technology of intermodulation distortion and testing method, which is applied in the testing field, can solve the problems of high testing cost, low testing efficiency, increasing testing complexity and testing difficulty, etc., so as to improve measurement accuracy, improve testing efficiency and ease of use of instruments degree of effect

CN108521309BActive Publication Date: 2020-09-01CHINA ELECTRONIS TECH INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-09-01

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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.
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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...

Examples

Embodiment 1

[0071] A frequency-sweeping intermodulation distortion testing system, comprising an intermodulation distortion parameter analysis unit, an intermodulation distortion scanning control unit, an intermodulation distortion data processing unit, and an intermodulation distortion calibration unit;

[0072] an intermodulation distortion parameter analysis unit configured to analyze all intermodulation distortion parameters of the current channel;

[0073] Summarize all the intermodulation distortion parameters of the current channel, analyze the excitation range and receiving range required by the intermodulation parameters according to the parameter name, measurement port, and measurement type, and store the results in the intermodulation distortion parameter structure;

[0074] The intermodulation distortion scanning control unit is configured to set the output range of the radio frequency source of the network instrument and the receiving range of the receiver according to the ana...