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Information about Radio Tuner

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A Sansui TU-X1 stereo FM tuner.
A tuner is an adjustable device which passes one radio frequency, or band of frequencies, and excludes others, by using electrical resonance. The simplest tuner consists of an inductor and capacitor. Combined with a detector, also known as a demodulator, it becomes the simplest radio receiver, often called a crystal set.

Tuners can be either stereo or mono, and are available for TV, FM, and AM signals.

Typically, AM and FM tuners are sold with built-in amplifiers and/or loudspeakers, and this device is referred to as a receiver. However, standalone stereo FM tuners are sought after for audiophile and TV/FM DX applications, especially those produced in the 1970s, when standards of quality were higher before plastic replaced metal. A few 1970s tuners feature now-deprecated Dolby noise reduction for FM broadcasts.

VHF/UHF TV tuners are rarely found as a separate component; however cable boxes serve as a separate tuner, and have channel 3/4 outputs so they can serve as a cable-ready emulator for TVs that aren't cable-ready, and also they sometimes have composite; and even S-video outputs so they can be used on composite monitors that do not have a TV tuner, or ones whose tuner is not working. They are usually bundled with a monitor, VCR, and/or PVR. However, they do exist for use by members of the television industry, and may be purchased on eBay.

TV tuners are also installed on PCI computer expansion cards (or in USB device, or even as a part of video card), together with a DSP, allowing a personal computer to display and/or capture television channels. A number of earlier models were stand-alone tuners, designed to deliver TV picture through a VGA connector. This allowed viewing television on a computer display, but, of course, did not allow recording programmes by the PC. See TV tuner card for more information about computer-designed TV tuners.

Transmitting tuner

Another type of radio tuner allows a transmitter to be efficiently operated with antennas and transmission lines that are not matched in impedance. Such a tuner is useful when operating an antenna system over a wide range of frequencies.

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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
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FreQuency is a music video game developed by Harmonix and published by SCEI. It was released in November 2001. A sequel, titled Amplitude was released in 2003.
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For other uses, see Band.


A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose.
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resonance is the tendency of a system to oscillate at maximum amplitude at a certain frequency. This frequency is known as the system's resonance frequency. When damping is small, the resonance frequency is approximately equal to the natural frequency of the system, which
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An inductor is a passive electrical device employed in electrical circuits for its property of inductance. An inductor can take many forms.

Physics

Overview


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capacitor is an electrical/electronic device that can store energy in the electric field between a pair of conductors (called "plates"). The process of storing energy in the capacitor is known as "charging", and involves electric charges of equal magnitude, but opposite polarity,
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detector is a device that recovers information of interest contained in a modulated wave. The term dates from the early days of radio when all transmissions were in Morse Code, and it was only necessary to "Detect" the presence (or absence) of a radio wave using a device such as a
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A demodulator is an electronic circuit used to recover the information content from the carrier wave of a signal. The term is usually used in connection with radio receivers, but there are many kinds of demodulators used in many other systems.
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A radio receiver is an electronic circuit that receives its input from an antenna, uses electronic filters to separate a wanted radio signal from all other signals picked up by this antenna, amplifies it to a level suitable for further processing, and finally converts through
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The crystal radio receiver (also known as a crystal set) is a very simple kind of radio receiver. It needs no battery or power source except the power received from radio waves by a long outdoor wire antenna.
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Stereophonic sound, commonly called stereo, is the reproduction of sound, using two or more independent audio channels, through a symmetrical configuration of loudspeakers, in such a way as to create a pleasant and natural impression of sound heard from various directions,
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Monaural (often shortened to mono) sound reproduction is single-channel. Typically there is only one microphone, one loudspeaker, or, in the case of headphones or multiple loudspeakers, they are fed from a common signal path, and in the case of multiple microphones, mixed
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Television (often abbreviated to TV, T.V., or more recently, tv; sometimes called telly, the tube, boob tube, or idiot box in British English) is a widely used telecommunication system for broadcasting and receiving moving pictures
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FM broadcasting is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation (FM) to provide high-fidelity sound over broadcast radio.
Main article: frequency modulation

Broadcast bands


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For the song by Everclear, see .


AM broadcasting is the process of radio broadcasting using Amplitude Modulation.

History

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Main article: History of radio

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amplifier is any device that will use a small amount of energy and convert it to a larger amount of energy. In popular use, the term today usually refers to an electronic amplifier, often as in audio applications.
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This article or section needs copy editing for grammar, style, cohesion, tone and/or spelling.
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A radio receiver is an electronic circuit that receives its input from an antenna, uses electronic filters to separate a wanted radio signal from all other signals picked up by this antenna, amplifies it to a level suitable for further processing, and finally converts through
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This article has been tagged since September 2007.

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TV DX and FM DX are two terms, customarily grouped together, that refer to long-distance reception of TV and FM radio stations, respectively. The term DX is an old telegraph term meaning "long distance.
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Plastic is the general term for a wide range of synthetic or semisynthetic polymerization products. They are composed of organic condensation or addition polymers and may contain other substances to improve performance or economics.
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The Macro Expansion Template Attribute Language complements TAL, providing macros which allow the reuse of code across template files. Both were created for Zope but are used in other Python projects as well.
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Centuries: 19th century - 20th century - 21st century

1940s 1950s 1960s - 1970s - 1980s 1990s 2000s
1970 1971 1972 1973 1974
1975 1976 1977 1978 1979

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- The 1970s decade refers to the years from 1970 to 1979, also called
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Dolby NR is the name given to a series of noise reduction systems developed by Dolby Laboratories for use in analogue magnetic tape recording. The first was Dolby A professional noise reduction for recording studios in 1966, but the best-known is Dolby B
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The term cable box can refer to:
  • Cable box (electronics) an electronic device that controls cable television in individual homes.
  • Cable box (outside) a box located outside a residence that connects cable television.

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Composite video, also called CVBS (Composite Video Blanking and Sync), is the format of an analog television (picture only) signal before it is combined with a sound signal and modulated onto an RF carrier.
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Separate video, abbreviated S-Video and also known as Y/C (or erroneously, S-VHS and "super video") is an analogue video signal that carries the video data as two separate signals (brightness and colour), unlike composite video which carries the entire set of
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composite monitor is any analog video display that receives input in the form of an analog composite video signal through a single cable — in contrast to multiple-cable or multiple-wire video sources such as VGA cable.
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A video monitor is a device similar to a television, used to monitor the output of a video generating device, such as a video camera, VCR, or DVD player. It may or may not have audio monitoring capability.
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digital video recorder (DVR) or personal video recorder (PVR) is a device that records video in a digital format to a disk drive or other medium. The term includes stand-alone set-top boxes and software for personal computers which enables video capture and
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