Device and method for realizing the function of spectrum analysis on vector network analyzer

Abstract

The invention proposes a device for realizing the function of spectrum analysis on a vector network analyzer, comprising an intermediate frequency regulation unit, an analog-to-digital conversion unit, a digital signal processing unit, and a programmable time clock generating unit. The intermediate frequency regulation unit enlarges and filters the intermediate frequency signal that enters the device; the analog-to-digital conversion unit performs analog-to-digital conversion to the regulated intermediate frequency signal so as to obtain a high-speed serial sampling signal; the digital signal processing unit carries out serial-parallel conversion to the sampling signal and then performs digital lowering frequency conversion, digital filtering, and frequency spectrum analyzing. The programmable time clock generating unit is able to provide a programmable differential sampling clock to the analog-to-digital conversion unit. The device and the method of the invention requires only one time connection to a single vector network analyzer by the user to realize the high performance network parameter measurement and frequency spectrum measurement to a tested component, which simplifies the complexity of measurement operations by the user and shortens the measurement time.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a device for realizing the spectrum analysis function on a vector network analyzer, and also to a method for realizing the spectrum analysis function on the vector network analyzer. Background technique [0002] During the R&D and production of active devices such as amplifiers, mixers, and frequency converters, engineers not only need to measure network parameters such as S-parameters, gain, return loss, and group delay, but also because most active devices are It is non-linear. In addition to generating useful frequency signals, they often generate additional harmful frequencies. These harmful frequencies will affect the performance indicators of the entire system, such as dynamic range and sensitivity. The output spectrum is measured to determine the cause of unwanted frequencies and eliminate them. [0003] At present, the method of network parameter measurement and spectrum...

AI Technical Summary

Problems solved by technology

[0004] The traditional "network analyzer + signal source + spectrum analyzer" solution needs to connect the DUT multiple times between different instruments, which is not only time-consuming and laborious, but also requires the purchase of multiple expensive microwave measuring instruments

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