Electronics (Mike Jaroch)

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R

The resistance that if inserted in place of the antenna would consume the
same amount of power as that radiated by the antenna [10].

The term describing teletypewriter, voice, telegraphic, and facsimile
communications. [17].

RADIO FREQUENCY (RF)—(1) Any frequency of electromagnetic energy capable of propagation into space [2]. (2) The frequencies that fall between 3 kilohertz and 300 gigahertz used for radio communications [10].

 Keyword(s): RADIO FREQUENCY , RF

RADIO FREQUENCY CARRIER SHIFT

The system that uses a keyer to shift a radio frequency signal above or below an assigned frequency. These shifts correspond to marks and spaces [17].

 Keyword(s): RADIO FREQUENCY CARRIER SHIFT

The boundary beyond the natural horizon in which radio waves cannot be propagated over the earth's surface [10].

RADIO SET CONTROL UNIT

Equipment used to remotely control certain transmitter and receiver
functions [17].

 Keyword(s): RADIO SET CONTROL UNIT

(1) A form of radiant energy that can neither be seen nor felt. (2) An electromagnetic wave that is generated by a transmitter [10].

Also called the base. The number of distinct symbols used in a number system. For example, since the decimal number system uses ten symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), the radix is 10. In the binary number system, the radix is 2 because it uses only two symbols (0, 1) [13].