A digital fft spectrum analyzer system and operating method

Abstract

The invention discloses a digital FFT (fast Fourier transform) frequency spectrograph system. The digital FFT (fast Fourier transform) frequency spectrograph system comprises a graphical interface module, a data processing module and a communication module. The graphical interface module is connected with the data processing module and the communication module. The data processing module is connected with the communication module. The graphical interface module creates user interfaces as well as threads of the data processing module and the communication module. The data processing module comprises two spectrum analyzer board cards, and has a local mode and a remote mode. The communication module is in communication connection with a dispatching computer, is provided with a signal lamp marking position, and comprises a storage module. Through a giga network, a large quantity of OTF (optical transfer function) data and standard source data are stored into a disk array remotely. The invention further discloses an operation method of the digital FFT frequency spectrograph system. The digital FFT frequency spectrograph system and the operation method thereof have the advantages of broadband, high frequency resolution, wide dynamic range, long-time-scale system stability, capability of subjecting radio astronomy signals or terahertz atmosphere signals to broadband high-resolution real-time frequency spectrum treatment and the like.

Description

technical field [0001] The invention relates to an FFT spectrum analyzer system, in particular to a 2-channel digital FFT spectrum analyzer system and an operating method. Background technique [0002] Spectrum analyzer is one of the essential instruments for signal spectrum analysis in radio astronomy and other fields. Spectrometers used in radio astronomy mainly include Filter Bank Spectrometer (FBS), Acousto-Optical Spectrometer (AOS), Auto Correlation Spectrometer (ACS) and FFT Spectrometer (Fast Fourier transform digital spectrometer Fast Fourier Transform Spectrometer, FFTS). The analog filter bank spectrum analyzer is mainly composed of an analog filter bank, a detector, an integrator and a readout circuit, etc. Due to poor channel consistency and adjacent channel crosstalk, it is impossible to achieve high-resolution spectrum analysis; the acousto-optic spectrum analyzer is mainly composed of Composed of laser source, optical path beam expander collimator, acousto-...

AI Technical Summary

Problems solved by technology

The analog filter bank spectrum analyzer is mainly composed of an analog filter bank, a detector, an integrator, and a readout circuit. Due to poor channel consistency and adjacent channel crosstalk, high-resolution spectrum analysis cannot be achieved; the acousto-optic spectrum analyzer is mainly composed of Composed of laser source, optical path beam expander collimator, acousto-optic deflector, Fourier lens, linear array photoelectric coupling device CCD (Charge Coupled Device) and readout circuit, etc., integrated machine optoelectronics and other technologies, although narrow-band high-resolution spectrum analysis can be realized , but its stability is affected by analog components such as acousto-optic deflectors and CCDs. The stability is relatively poor, which is not conducive to depth integration, and has the disadvantages of large volume and high power consumption.

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