In this work, a novel approach of ultrafast frequency measurement based on electro-optic Fabry-Perot (EOFP) scanning receiver is proposed for the first time. In comparison with other frequency scanning measurement systems, which use methods such as mechanical tuning, electric heating, scanning microwave signal, FS-RDL, etc., our double-EOFP system can measure signals with frequency under 54 GHz in 2 s, which is the fastest scanning rate as far as we know.
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