An automatic debugging method for open-loop power linearity applied to signal generators

Abstract

In order to improve the accuracy of the open-loop power linearity index and improve the ease of debugging and meet the requirements of instrument productivity, the present invention proposes an automatic debugging method for the open-loop power linearity, which can make the ALC open-loop power in Under the control of the internal debugging software, by reading the internal test voltage and the corresponding algorithm, the automatic open-loop power linearity debugging can be realized, which improves the open-loop power linearity index and debugging efficiency, and effectively reduces the production cost.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to an automatic debugging method for open-loop power linearity. Background technique [0002] With the development of signal generation technology, the output power control has experienced from the open calibration power plus attenuation method to the closed-loop automatic level loop control method. At present, the feed-forward ALC system that can perform open-loop power control is widely used. , its principle block diagram is as follows figure 1 shown. [0003] With the increase of the frequency range and power dynamic range of the instrument, the cascaded amplifiers and multi-stage filters of microwave components are increasing, resulting in poor in-band frequency response in the full frequency range under open-loop conditions, and the extreme value of the frequency response band is often It will exceed the dynamic adjustment range of the ALC closed-loop adjustment, and can no l...

AI Technical Summary

Problems solved by technology

[0007] (1) The debugging steps are complicated. Since the signal generator has a wide frequency range and many bands, it is first necessary to find the frequency corresponding to the intermediate power point in each band, and then repeatedly debug each parameter to determine whether the group of band parameters is correct. Meet the indicators

[0008] (2) The original debugging method can only debug the symmetry of the power frequency response curve and the power dynamic range of the debugging frequency point, but it cannot guarantee that the frequency response curve can cross the zero point. In addition, the best debugging points for the open-loop power linearity are not all available. Corresponding to the middle frequency point of each band, the current band open-loop power debugging effect may not be the best

[0009] (3) Due to the nonlinear characteristics of the circuit, the circuit parameters of each signal generator are different, and there is no fixed rule to follow, which greatly affects the debugging efficiency of the instrument

[0010] (4) When the debugging environment changes, the debugger needs to search for various test instruments for debugging, which will also affect the productivity of the signal generator

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