略語大辞典 [MIL] 23 DFD digital frequency discriminator ディジタル周波数弁別回路. 瞬間周波数測定用受信機. パルス傍受用の電子兵器受信機.digital frequency discriminator; an intercept radio receiver; an electronic warfare; an IFM(instantaneous frequency measurement) receiver; e.g. measures the frequency of RF(radio frequency) signals in less tha 丸善「略語大辞典」JLogosID : 11871629