The individual answerable for all functions and proper operation of a radio station. The individual at a broadcasting station accountable for proper and legal operation of a station and upkeep of all required information. A station that at all times operates from a constant, specified land location. The physical location from which a radio stations capabilities (setting frequency, turning the station off and on, etc.) are controlled. When two or more packet radio stations simultaneously attempt to transmit on the identical frequency. The amount of frequency space occupied by a radio sign. A receiver circuit that modify the amount of amplification given to a received signal in order that the quantity from the speaker stays comparatively fixed. The constant output of a radio transmitter that can be periodically interrupted to send messages by Morse code. AMTOR: Acronym for "beginner teleprinting over radio," a mode that makes use of FSK to ship messages containing error detection capabilities and the flexibility request retransmission of lacking or corrupted knowledge.

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 in the United States. ASCII: Acronym for "American customary code for data interchange," a way of representing higher and lower letters along with numbers and particular symbols. How nicely a receiver responds to weak signals, measured in microvolts (mV); the lower the number of microvolts indicated, the extra sensitive the receiver. Much like exalted provider reception, but the substitute service tuning and monitoring is finished mechanically by the receiver. A tuning method in transmitters and receivers which uses a number of piezoelectric crystals to generate a variety of frequencies. A frequency vary put aside for international ham radio stations to transmit in whereas ham stations within the United States and Canada don't; American and Canadian stations name foreign stations on frequencies outside the window. A way of restricting entry to a repeater station to stations that start their transmission with a special sequence of tones. Spoken at the top of a transmission to point 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 lower the angle, the larger distance the radio signal will journey via ionospheric refraction. Placing a loading coil at the center of an antenna as a way to decrease 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 assorted with a view to convey data. PM: Abbreviation for part modulation. PLL: abbreviation for phase locked loop. CW: Abbreviation for steady wave. The frequency at or near the MUF at which the maximum sky wave propagation range is obtained. A circuit that tunes a receivers signal amplifying circuitry for maximum sensitivity on a desired frequency range. A machine put in between a receiver or transmitter and the antenna to match the radio impedance to the antenna impedance for max power transfer.

A circuit that eliminates unwanted 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 within the modulating audio signal. A modulation approach that varies the provider frequency of a transmitter in accordance with the variations within the power of the modulating audio signal. This is used after a frequency to point that it varies barely. 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 customers in order to forestall interference, especially for repeater stations. A bunch of letters and numbers used to identify a station and the country authorizing its operation. 1) When a station ends its operations and shuts down; 2) When a frequency can no longer support propagation to a desired station or location. QTH: Radiotelegraph abbreviation for a stations location.