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The person accountable for all features and proper operation of a radio station. The individual at a broadcasting station accountable for proper and authorized operation of a station and maintenance of all required data. A station that all the time operates from a constant, specified land location. The physical location from which a radio stations features (setting frequency, turning the station off and on, and many others.) are managed. When two or extra packet radio stations simultaneously attempt to transmit on the identical frequency. The quantity of frequency space occupied by a radio sign. A receiver circuit that modify the amount of amplification given to a received sign in order that the quantity from the speaker stays relatively constant. The constant output of a radio transmitter that may be periodically interrupted to send messages by Morse code. AMTOR: Acronym for "novice teleprinting over radio," a mode that makes use of FSK to send messages containing error detection capabilities and the flexibility request retransmission of lacking or corrupted information.

ANARC: Acronym for "Association of North American Radio Clubs," an affiliation of radio listener clubs in the United States and Canada. ARRL: Acronym for "American Radio Relay League," the nationwide association for ham radio operators in the United States. ASCII: Acronym for "American normal code for data interchange," a method of representing upper and decrease 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 extra delicate the receiver. Just like exalted provider reception, however the alternative carrier tuning and monitoring is done routinely by the receiver. A tuning technique in transmitters and receivers which uses a few piezoelectric crystals to generate a variety of frequencies. A frequency range set aside for international ham radio stations to transmit in whereas ham stations in the United States and Canada don't; American and Canadian stations call foreign stations on frequencies outdoors the window. A way of proscribing entry to a repeater station to stations that start their transmission with a special sequence of tones. Spoken at the end of a transmission to indicate to the other station that it is their turn to transmit.

The frequency on which a radio transmission takes place, or the enter and output frequency pair utilized by a repeater station. The decrease the angle, the greater distance the radio sign will travel by means of ionospheric refraction. Placing a loading coil at the middle of an antenna so as to lower the antennas resonant frequency. A modulation method by which the timing, amplitude, medium voltage overhead cable and/or spacing of pulses of a transmitters carrier are varied to be able to convey information. PM: Abbreviation for section modulation. PLL: abbreviation for phase locked loop. CW: Abbreviation for steady 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 maximum energy switch.

A circuit that eliminates undesirable audio frequencies from the audio output of a receiver. A modulation method that varies the power output of a transmitter in accordance with the variations in 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 sign. This is used after a frequency to point that it varies slightly. A group of stations that meet on a specified frequency at a certain time. A non-governmental group that works to voluntarily assign frequencies to users in order to stop interference, particularly for repeater stations. A gaggle 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.