Radio Terms And Abbreviations

The sideband decrease in frequency than the transmitters carrier. A reception approach the place the service produced by a receivers BFO circuit or product detector is used to change the provider of an AM signal for better 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 extra circuitry for enhanced reception of SSB indicators. Yagi: A directional antenna consisting of a dipole related to the receiver or transmitter and two further elements, a slightly longer reflector and a barely shorter director. A directional antenna consisting of two one-wavelength "squares" of wire positioned a quarter-wavelength apart. In FSK, the upper of the two frequencies used. A filter that rejects all frequencies above a sure point however which permits all lower frequencies to move.

A filter that rejects all frequencies under a certain level however which permits all greater frequencies to cross. An antenna suitable for operation on just one band of frequencies. Radio signals from 300 to 3000 kHz, although this term is often used to mean any radio sign in the AM broadcast band (540 to 1700 kHz). Radio alerts 300 kHz and lower in frequency, although this term is often 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 levels on a logarithmic scale. A high pitched "whistle" sound brought on by two carriers interfering with each other. The pitch of the "whistle" is dependent upon the frequency distinction between the carriers. A machine that receives multiple indicators within a sure frequency range and concurrently retransmits them in one other frequency vary. A frequency that's an integer multiple (two occasions, 3 times, and many others.) of a lower frequency. LUF: Abbreviation for lowest usable frequency, the bottom frequency that can assist 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 method in transmitters and receivers which uses a couple of piezoelectric crystals to generate a variety of frequencies. A time period used to describe receivers and transmitters protecting no less than the frequency vary of 500 kHz to 30 MHz and capable of operation in several totally 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 not less than 100 completely different nations. FEC: Abbreviation for forward error correction, a FSK mode that transmits every character twice to avoid errors. A mode that shifts the stations carrier between two fixed frequencies to type characters. An antenna appropriate for operation on several different bands of frequencies. For best performance, 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 best, radio waves having their electric field parallel to the Earths floor. The opposition to the circulation of electric present and radio power; it is measured in ohms (W).

RST: A code used by ham radio operators to indicate a stations readability, signal energy, and tone of its Morse code signals. 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 path of maximum radiation or acquired sign energy for a directional antenna. S-meter: A meter or bargraph that indicates the relative power of a received signal. The obvious improve in the energy of a sign radiated or received by an antenna attributable to the antenna having higher efficiency in some instructions than others. An antenna that transmits and receives equally nicely in all instructions. The frequency at which an antenna radiates or receives with maximum efficiency. MUF: Abbreviation for optimum usable frequency, the best frequency that can assist propagation between two factors. Hz: Abbreviation for kilohertz. Unit equal to 1,000,000 hertz or 1000 kilohertz. Unit equal to 1000 hertz. Unit equal to 1,000,000 watts of transmitter energy.

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