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The individual answerable for all features and correct operation of a radio station. The particular person at a broadcasting station accountable for proper and authorized operation of a station and maintenance of all required information. A station that at all times operates from a relentless, specified land location. The bodily location from which a radio stations features (setting frequency, turning the station off and on, and so on.) are managed. When two or more packet radio stations simultaneously try to transmit on the identical frequency. The quantity of frequency house occupied by a radio sign. A receiver circuit that alter the amount of amplification given to a acquired sign in order that the volume from the speaker stays comparatively constant. The fixed output of a radio transmitter that may be periodically interrupted to send messages by Morse code. AMTOR: Acronym for "amateur teleprinting over radio," a mode that uses FSK to ship messages containing error detection capabilities and the power request retransmission of missing or corrupted data.

ANARC: Acronym for "Association of North American Radio Clubs," an association of radio listener clubs within the United States and Canada. ARRL: Acronym for "American Radio Relay League," the national association for ham radio operators in the United States. ASCII: Acronym for "American normal code for information interchange," a technique of representing upper and lower letters along with numbers and particular symbols. How effectively a receiver responds to weak indicators, measured in microvolts (mV); the decrease the variety of microvolts indicated, the more sensitive the receiver. Just like exalted provider reception, however the substitute provider tuning and monitoring is finished automatically by the receiver. A tuning technique in transmitters and receivers which makes use of just a few piezoelectric crystals to generate a wide range of frequencies. A frequency range set aside for foreign ham radio stations to transmit in whereas ham stations in the United States and Canada do not; American and Canadian stations call international stations on frequencies exterior the window. A way of restricting entry to a repeater station to stations that begin their transmission with a particular sequence of tones. Spoken at the end of a transmission to indicate to the opposite station that it's their turn to transmit.

The frequency on which a radio transmission takes place, or the enter and output frequency pair used by a repeater station. The decrease the angle, the greater distance the radio sign will journey by ionospheric refraction. Placing a loading coil at the center of an antenna with a purpose to decrease the antennas resonant frequency. A modulation technique in which the timing, amplitude, medium voltage overhead cable and/or spacing of pulses of a transmitters provider are different so as to convey information. PM: Abbreviation for part modulation. PLL: abbreviation for section locked loop. CW: Abbreviation for continuous wave. The frequency at or close to the MUF at which the utmost sky wave propagation vary is obtained. A circuit that tunes a receivers signal amplifying circuitry for optimum sensitivity on a desired frequency range. A machine installed between a receiver or transmitter and the antenna to match the radio impedance to the antenna impedance for optimum power switch.

A circuit that eliminates undesirable audio frequencies from the audio output of a receiver. A modulation approach that varies the facility output of a transmitter in accordance with the variations in the modulating audio sign. A modulation method that varies the carrier frequency of a transmitter in accordance with the variations in the energy of the modulating audio sign. That is used after a frequency to indicate that it varies barely. A bunch of stations that meet on a specified frequency at a certain time. A non-governmental group that works to voluntarily assign frequencies to users so as to stop interference, especially for repeater stations. A group of letters and numbers used to determine a station and the nation authorizing its operation. 1) When a station ends its operations and shuts down; 2) When a frequency can not support propagation to a desired station or location. QTH: Radiotelegraph abbreviation for a stations location.