A method for automatic acquisition of compensation data for yig tuned filters

Abstract

The invention discloses a method for automatically acquiring compensation data of a YIG tuning filter, and specifically relates to the technical field of acquisition of dynamic nonlinear compensation data of a signal analyzer. The method for automatically obtaining the compensation data of the YIG tuning filter is used for the production debugging and calibration of the signal analyzer, and realizes the high-speed and high-precision linear tuning of the YIG tuning filter. During the production debugging or calibration process, the comb wave generator built in the front end of the RF channel of the signal analyzer is equivalent to the signal source to provide the inspection input signal. The YIG filter is tuned under linear voltage or linear current (main tuning drive), and the lag offset of different tuning frequency points is different. In this way, different comb wave signals with exactly the same power will have different test powers after passing through the YIG filter. By calling the compensation data to provide appropriate compensation drive for different tuning frequency points, the transient position of the YIG filter during the dynamic tuning process is consistent with the static tuning, which can ensure that the signal power test is not affected by the YIG filter tuning process.

Description

technical field [0001] The invention relates to the technical field of acquisition of dynamic nonlinear compensation data of a signal analyzer, in particular to a method for automatically acquiring compensation data of a YIG tuning filter. Background technique [0002] The fast tuning of the signal analyzer is mainly limited by the characteristics of the core component, the YIG filter. Under static conditions, the tuning frequency of the YIG filter is linearly corresponding to the drive current. However, under dynamic conditions, the driving current to realize the linear fast tuning of the YIG filter is not linear. In the case that the fast tuning function model of the YIG filter cannot be given at present, the more classic drive design adopts a dual drive scheme, that is, the drive tuning current is generated jointly by two channels. According to the static tuning characteristics, one drive generates high-precision, high-accuracy and linearly changing main drive tuning; t...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low production efficiency and high production cost due to the need to manually obtain the dynamic compensation data of the YIG filter in the existing signal analyzer. Check the signal, through the method of testing and checking the signal power, and the method of automatically obtaining the fast tuning and compensation data of the YIG filter

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