Wave detection device and method for spectrum analyzer

Abstract

A detection device and method for a spectrum analyzer, the central processing unit system receives and calculates the detection information data corresponding to each data collection unit and stores the detection information data in the internal memory; the programmable logic controller generates a detection information data request and output the request; the data interaction interface obtains the detection information data from the internal memory of the central processing unit system and sends it to the programmable logic controller when receiving the request; the programmable logic controller processes the original scanning data according to the detection information data Process according to preset mathematical operations. The present invention calculates and stores the detection information data in the central processing unit system without occupying too many computing resources of the central processing unit system. The internal storage resources of the controller, and there is no need to add a high-speed memory on the programmable logic controller side.

Description

technical field [0001] The invention relates to the technical field of spectrum analyzers, in particular to a detection device and method for spectrum analyzers. Background technique [0002] Spectrum analyzer is an instrument for studying the spectrum structure of electrical signals. It is used to measure signal parameters such as signal distortion, modulation degree, spectral purity, frequency stability and intermodulation distortion. It can be used to measure certain components of circuit systems such as amplifiers and filters. Parameter, is a multipurpose electronic measuring instrument. [0003] For frequency domain analysis of spectrum analyzers, especially frequency domain analysis with a large dynamic range, scanning is a necessary process, and it is also something that must be done internally when modern spectrum analyzers perform measurements. The scanning process of the spectrum analyzer can be summarized as scanning from the start frequency to the stop frequency...

AI Technical Summary

Problems solved by technology

However, in order to display the details of the signal as much as possible, the high-end spectrum analyzer often supports up to 10^5 levels of detection points, and each detection point requires corresponding detection information data, and so many detection information data are stored Inside the FPGA, it will take up too much precious and scarce storage resources inside the FPGA, which will inevitably compress the design resources of other modules, which is very detrimental to the flexibility and scalability of FPGA system design

[0008] (3) On the basis of the above (2) scheme, a high-speed memory (such as DDR) is plugged into the FPGA side, and the detection information data is stored in the high-speed memory. Although this scheme can solve the problem of insufficient internal storage resources of the FPGA , but increases the cost of the entire system, and significantly increases the difficulty of designing the hardware system

However, when the user needs logarithmic detection, since the FPGA is not suitable for complex mathematical operations, it will become extremely complicated to calculate the detection information of each bucket in real time on the FPGA side, so this solution is not very versatile.

Images