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The sideband lower in frequency than the transmitters provider. A reception method where the carrier produced by a receivers BFO circuit or product detector is used to replace the provider of an AM signal for better reception. DXpedition: An organized effort by ham radio operators to put a uncommon location on the air, or a trip by shortwave listeners to a site for favorable DX reception. A receiver circuit consisting of a beat frequency oscillator and extra circuitry for enhanced reception of SSB signals. Yagi: A directional antenna consisting of a dipole linked to the receiver or transmitter and two extra components, a slightly longer reflector and a slightly shorter director. A directional antenna consisting of two one-wavelength "squares" of wire placed a quarter-wavelength apart. In FSK, the upper of the 2 frequencies used. A filter that rejects all frequencies above a certain point but which allows all lower frequencies to pass.

A filter that rejects all frequencies beneath a certain level however which permits all larger frequencies to go. An antenna appropriate for operation on just one band of frequencies. Radio indicators from 300 to 3000 kHz, although this term is usually used to mean any radio signal within the AM broadcast band (540 to 1700 kHz). Radio indicators 300 kHz and lower in frequency, though this term is commonly used to mean any radio sign decrease than 540 kHz. GMT: Abbreviation for Greenwich imply time. SWR: Abbreviation for standing wave ratio. The ratio between two power ranges on a logarithmic scale. A high pitched "whistle" sound caused by two carriers interfering with one another. The pitch of the "whistle" depends upon the frequency difference between the carriers. A system that receives multiple indicators within a certain frequency range and concurrently retransmits them in another frequency range. A frequency that is an integer multiple (two occasions, 3 times, etc.) of a decrease frequency. LUF: Abbreviation for lowest usable frequency, the bottom frequency that may support propagation between two points. MW: Abbreviation for megawatt. IRC: Abbreviation for International Reply Coupon. FSK: Abbreviation for frequency shift keying.

UHF low: The frequency range from 450 to 470 MHz. A tuning methodology in transmitters and receivers which makes use of a few piezoelectric crystals to generate a wide range of frequencies. A time period used to explain receivers and transmitters covering at least the frequency vary of 500 kHz to 30 MHz and able to operation in a number of different modes, together with AM, CW, and SSB. DXCC: Abbreviation for "DX Century Club," an award given by the ARRL to hams who contact other hams in at least one hundred different nations. FEC: Abbreviation for forward error correction, a FSK mode that transmits each character twice to avoid errors. A mode that shifts the stations service between two mounted frequencies to kind characters. An antenna appropriate for operation on a number of different bands of frequencies. For best efficiency, the impedance of an antenna, the feedline, and the antenna connector on a radio ought to be approximately equal. An antenna that radiates, or receives finest, radio waves having their electric subject parallel to the Earths surface. The opposition to the circulation of electric present and radio power; it's measured in ohms (W).

RST: A code utilized by ham radio operators to point a stations readability, sign 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 obtained signal strength for a directional antenna. S-meter: A meter or bargraph that signifies the relative strength of a received signal. The apparent enhance in the strength of a sign radiated or obtained by an antenna attributable to the antenna having higher performance in some directions than others. An antenna that transmits and receives equally well in all instructions. The frequency at which an antenna radiates or receives with maximum efficiency. MUF: Abbreviation for max usable frequency, the highest frequency that may support 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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