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The individual responsible for all features and correct operation of a radio station. The particular person at a broadcasting station accountable for correct and legal operation of a station and maintenance of all required data. A station that at all times operates from a relentless, specified land location. The physical location from which a radio stations functions (setting frequency, turning the station off and on, and so forth.) are managed. When two or more packet radio stations concurrently try to transmit on the same frequency. The quantity of frequency space occupied by a radio sign. A receiver circuit that adjust the quantity of amplification given to a received sign in order that the amount from the speaker stays relatively fixed. 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 makes use of FSK to send messages containing error detection capabilities and the power request retransmission of lacking or corrupted data.

ANARC: Acronym for "Association of North American Radio Clubs," an affiliation of radio listener clubs within the United States and Canada. ARRL: Acronym for "American Radio Relay League," the national affiliation for ham radio operators within the United States. ASCII: Acronym for "American customary code for data interchange," a method of representing higher and lower letters along with numbers and particular symbols. How well a receiver responds to weak indicators, measured in microvolts (mV); the decrease the variety of microvolts indicated, the extra sensitive the receiver. Just like exalted carrier reception, but the alternative carrier tuning and tracking is finished routinely by the receiver. A tuning method in transmitters and receivers which makes use of a number of piezoelectric crystals to generate a wide range of frequencies. A frequency range set aside for overseas ham radio stations to transmit in while ham stations within the United States and Canada do not; American and Canadian stations call foreign stations on frequencies outside the window. A way of proscribing access to a repeater station to stations that begin their transmission with a particular sequence of tones. Spoken at the tip of a transmission to indicate to the opposite station that it's their flip to transmit.

The frequency on which a radio transmission takes place, or the input and output frequency pair utilized by a repeater station. The decrease the angle, the better distance the radio sign will journey through ionospheric refraction. Placing a loading coil at the middle of an antenna in an effort to lower the antennas resonant frequency. A modulation method wherein the timing, amplitude, medium voltage overhead cable and/or spacing of pulses of a transmitters provider are assorted in order to convey data. PM: Abbreviation for section modulation. PLL: abbreviation for part locked loop. CW: Abbreviation for steady wave. The frequency at or close to the MUF at which the utmost sky wave propagation range is obtained. A circuit that tunes a receivers sign amplifying circuitry for optimum sensitivity on a desired frequency range. A system installed between a receiver or transmitter and the antenna to match the radio impedance to the antenna impedance for optimum energy switch.

A circuit that eliminates unwanted audio frequencies from the audio output of a receiver. A modulation technique that varies the facility output of a transmitter in accordance with the variations within the modulating audio signal. A modulation approach that varies the service frequency of a transmitter in accordance with the variations within the energy of the modulating audio signal. 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 customers in order to stop interference, particularly for repeater stations. A bunch of letters and numbers used to determine a station and the country 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.