A Method of Frequency Correction for Heterodyne Spectrum Analyzer

A spectrum analyzer and frequency correction technology, applied in the field of signal processing, can solve problems such as limited accuracy of LO tuning points, and achieve the effects of saving adoption time, improving adoption efficiency, and improving spectrum accuracy
CN103630743BInactive Publication Date: 2015-12-30UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2015-12-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for frequency correction of a heterodyne spectrum analyzer. When the signal is sent to the heterodyne spectrum analyzer and processed, the resolution bandwidth RBW is judged. If the RBW>10 times fmin, the filter is scanned The signal is amplified or compressed by the method of envelope detection and video filtering to obtain the signal spectrum; when RBW≤10 times fmin, the difference between the recorded tuning frequency point value and the actual transmission tuning frequency point value is calculated by FFT scanning method After the FFT transformation, the errors converted into data points are eliminated for spectrum errors, thereby improving the accuracy of spectrum identification.
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Description

technical field

[0001] The invention belongs to the technical field of signal processing, and more specifically relates to a method for frequency correction of a heterodyne spectrum analyzer. Background technique

[0002] Spectrum analyzers can be divided into scanning spectrum analyzers and non-scanning spectrum analyzers according to their working principles. Scanning spectrum analyzers can be mainly divided into filter type and heterodyne type. The filter-type spectrum analyzer mainly uses a multi-channel filter spectrum analyzer, also known as a parallel filter. For different signal frequencies, different filters are used for processing, and finally the multi-tasking scanner transmits the signal to the screen for display, but This spectrum analyzer structure requires multiple sets of filters, which consumes a lot of resources and costs a lot.

[0003] The heterodyne spectrum analyzer can realize multi-stage frequency conversion of high-frequency signals, so the sweep-ty...

Claims

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