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Hfdf Definition from Government Dictionaries & Glossaries
high frequency direction-finding
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )
High Frequency Direction Finding
Hfdf Definition from Science & Technology Dictionaries & Glossaries
High Frequency Distribution Frame
Abbreviation for high-frequency distribution frame.
A distribution frame that provides terminating and interconnecting facilities for those combined supergroup modulator output circuits and combined supergroup demodulator input circuits that contain signals occupying the baseband spectrum. (188 )
Hfdf Definition from Encyclopedia Dictionaries & Glossaries
High-frequency direction finding, usually known by its abbreviation HF/DF (nicknamed huff-duff) is the common name for a type of radio direction finding employed especially during the two World Wars.
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