Radio Terms And Abbreviations

The sideband decrease in frequency than the transmitters carrier. A reception method where the carrier produced by a receivers BFO circuit or product detector is used to change the carrier of an AM signal for higher reception. DXpedition: An organized effort by ham radio operators to place a uncommon location on the air, or a visit by shortwave listeners to a site for favorable DX reception. A receiver circuit consisting of a beat frequency oscillator and additional circuitry for enhanced reception of SSB alerts. Yagi: A directional antenna consisting of a dipole connected to the receiver or transmitter and two extra elements, a slightly longer reflector and a barely shorter director. A directional antenna consisting of two one-wavelength "squares" of wire placed a quarter-wavelength apart. In FSK, the higher of the 2 frequencies used. A filter that rejects all frequencies above a certain level however which allows all decrease frequencies to cross.

A filter that rejects all frequencies beneath a certain level but which permits all larger frequencies to cross. An antenna suitable for operation on just one band of frequencies. Radio signals from 300 to 3000 kHz, though this time period is often used to mean any radio sign within the AM broadcast band (540 to 1700 kHz). Radio signals 300 kHz and lower in frequency, though this time period is often used to imply any radio signal decrease than 540 kHz. GMT: Abbreviation for Greenwich imply time. SWR: Abbreviation for standing wave ratio. The ratio between two energy ranges on a logarithmic scale. A high pitched "whistle" sound caused by two carriers interfering with each other. The pitch of the "whistle" will depend on the frequency difference between the carriers. A gadget that receives a number of signals inside a sure frequency vary and simultaneously retransmits them in another frequency vary. A frequency that is an integer a number of (two occasions, three times, and so on.) of a lower frequency. LUF: Abbreviation for lowest usable frequency, the lowest frequency that may help propagation between two factors. MW: Abbreviation for megawatt. IRC: Abbreviation for International Reply Coupon. FSK: Abbreviation for frequency shift keying.

UHF low: The frequency vary from 450 to 470 MHz. A tuning technique in transmitters and receivers which makes use of a few piezoelectric crystals to generate a variety of frequencies. A term used to describe receivers and transmitters covering not less than the frequency range of 500 kHz to 30 MHz and able to operation in a number of completely different modes, together with AM, CW, and SSB. DXCC: Abbreviation for "DX Century Club," an award given by the ARRL to hams who contact different hams in not less than one hundred different countries. FEC: Abbreviation for ahead error correction, a FSK mode that transmits each character twice to avoid errors. A mode that shifts the stations carrier between two fastened frequencies to type characters. An antenna suitable for operation on a number of totally different bands of frequencies. For best efficiency, the impedance of an antenna, the feedline, and the antenna connector on a radio must be roughly equal. An antenna that radiates, or receives best, radio waves having their electric discipline parallel to the Earths floor. The opposition to the flow of electric present and radio vitality; it is measured in ohms (W).

RST: A code utilized by ham radio operators to point a stations readability, signal energy, and tone of its Morse code alerts. Slang for a face-to-face assembly between two ham radio operators or radio hobbyists. Slang for the maximum transmitter energy authorized for ham radio operators. The direction of most radiation or acquired signal energy for a directional antenna. S-meter: A meter or bargraph that signifies the relative energy of a acquired signal. The obvious enhance within the strength of a signal radiated or obtained by an antenna caused by the antenna having better performance in some directions than others. An antenna that transmits and receives equally properly in all instructions. The frequency at which an antenna radiates or receives with most efficiency. MUF: Abbreviation for maximum usable frequency, the very best frequency that can help propagation between two factors. Hz: Abbreviation for kilohertz. Unit equal to 1,000,000 hertz or 1000 kilohertz. Unit equal to one thousand hertz. Unit equal to 1,000,000 watts of transmitter energy.

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