Instruct: Given a question, retrieve passages that can help answer the question.
Query: Can you use a TV antenna for FM radio?
Antennas are commonly placed on rooftops, and sometimes in attics. Placing an antenna indoors significantly attenuates the level of the available signal.[5][6] Directional antennas must be pointed at the transmitter they are receiving; in most cases great accuracy is not needed. In a given region it is sometimes arranged that all television transmitters are located in roughly the same direction and use frequencies spaced closely enough that a single antenna suffices for all. A single transmitter location may transmit signals for several channels.[7] CABD (communal antenna broadcast distribution) is a system installed inside a building to receive free-to-air TV/FM signals transmitted via radio frequencies and distribute them to the audience.[8]
The Belling-Lee connector (also type 9,52, but largely only in the context of its specification, "IEC 61169, Part 2: Radio-frequency coaxial connector of type 9,52") is commonly used in Europe and Australia to connect coaxial cables with each other and with terrestrial VHF/UHF roof antennas, antenna signal amplifiers, CATV distribution equipment, TV sets, and FM and DAB radio receivers. In these countries, it is known colloquially as a PAL antenna connector, IEC antenna connector, or simply as a TV aerial plug. It is one of the oldest coaxial connectors still commonly used in consumer devices.
A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. The antenna is designed to be flexible so that it does not break easily, and the name is derived from the whip-like motion that it exhibits when disturbed. Whip antennas for portable radios are often made of a series of interlocking telescoping metal tubes, so they can be retracted when not in use. Longer ones, made for mounting on vehicles and structures, are made of a flexible fiberglass rod around a wire core and can be up to 35 ft (10 m) long. The length of the whip antenna is determined by the wavelength of the radio waves it is used with. The most common type is the "quarter-wave whip", which is approximately one-quarter of a wavelength long. Whips are the most common type of monopole antenna, and are used in the higher frequency HF, VHF and UHF radio bands. They are widely used as the antennas for hand-held radios, cordless phones, walkie-talkies, FM radios, boom boxes, and Wi-Fi enabled devices, and are attached to vehicles as the antennas for car radios and two-way radios for wheeled vehicles and for aircraft. Larger versions mounted on roofs and radio masts are used as base station antennas for police, fire, ambulance, taxi, and other vehicle dispatchers.
The Holston Mountain collection of broadcast towers, commonly referred to as an "antenna farm" is a good example of radio and TV station owners, co-locating their broadcast towers near each other on the highest point near their FCC city of license. This marketing practice was borne during the 1950s, before cable and during a time when all homes had outside antennae to receive broadcast signals. When the viewer wanted to receive a clear picture or FM stereo from their favorite station, they would point their antennae toward that radio or TV station's broadcasting tower (usually on the highest mountain peak nearby). Other station owners realized the benefit of locating their transmitting towers near that one, to allow viewers to get clear signals from their stations, too. The nearest antenna farm to Holston Mountain is southwest to Sharp's Ridge, on which most of the FM and TV stations in the Knoxville, Tennessee Designated Market Area (DMA) have their antennas and towers. The next nearest from Holston Mountain is on Poor Mountain in Central Virginia, home to most of the FM and TV stations in the Roanoke, Virginia Radio and Television DMA. Although most radio and TV stations are in fierce competition with each other in their broadcast markets, they will often locate their broadcasting antennas very near each other, and in some cases, will even share land or towers with each other, in the interests of space, land availability, and the cost of putting a transmission building on top of a mountain.
Rotators are commonly used in amateur radio and military communications installations. They are also used with TV and FM antennas, where stations are available from multiple directions, as the cost of a rotator is often significantly less than that of installing a second antenna to receive stations from multiple directions.
WPBA and WABE share two adjacent towers in the east side of the city between Edgewood and Kirkwood, with the single transmitter antenna used by local radio stations WSB-FM (98.5), WSTR (94.1 FM) and WVEE (103.3 FM). (The transmitters used by the three radio stations are diplexed together, so that they all feed to the antenna instead of into one another.) WABE formerly maintained transmitter facilities on Stone Mountain, but was forced to relocate as a result of WGTV needing the space for its digital equipment, in addition to maintaining its analog transmitter, along with the existing use of the tower by KEC80 to transmit NOAA Weather Radio broadcasts.
Whip antennas are normally designed as resonant antennas; the rod acts as a resonator for radio waves, with standing waves of voltage and current reflected back and forth from its ends. Therefore, the length of the antenna rod is determined by the wavelength of the radio waves used. The most common length is approximately one-quarter of the wavelength, called a "quarter-wave whip" (although often shortened by the use of a loading coil; see Electrically short whips below). For example, the common quarter-wave whip antennas used on FM radios in the USA are approximately 75 cm long, which is roughly one-quarter the length of radio waves in the FM radio band, which are 2.78 to 3.41 meters long. Half-wave antennas are also common.
While only a limited number of local stations can normally be received at satisfactory signal strengths in any given area, tuning into other channels may reveal weaker signals from adjacent areas. More consistently strong signals, especially those accentuated by unusual atmospheric conditions, can be achieved by improving the antenna system. The development of interest in TV-FM DX as a hobby can arise after more distant signals are either intentionally or accidentally discovered, leading to a serious interest in improving the listener's antenna and receiving installation for the purpose of actively seeking long-range television and radio reception. The TV-FM DX hobby is somewhat similar to other radio/electronic related hobbies such as amateur radio, Medium Wave DX, or short-wave radio, and organisations such as the Worldwide TV-FM DX Association have developed to coordinate and foster the further study and enjoyment of VHF/UHF television and FM broadcast DX.
German physicist Heinrich Hertz first demonstrated the existence of radio waves in 1887 using what we now know as a dipole antenna (with capacitative end-loading). On the other hand, Guglielmo Marconi empirically found that he could just ground the transmitter (or one side of a transmission line, if used) dispensing with one half of the antenna, thus realizing the "vertical" or monopole antenna. For the low frequencies Marconi employed to achieve long-distance communications, this form was more practical; when radio moved to higher frequencies (especially VHF transmissions for FM radio and TV) it was advantageous for these much smaller antennas to be entirely atop a tower thus requiring a dipole antenna or one of its variations.
Second-hand automobiles imported from Japan contain a radio designed for the Japanese FM band, and importers often fit a "converter" to down-convert the 87.5 to 108.0 MHz band to the frequencies that the radio can accept. In addition to showing an incorrect frequency, there are two other disadvantages that can result in undesired performance; the converter cannot down-convert in full the regular international FM band (up to 20.5 MHz wide) to the only 14 MHz wide Japanese band (unless the converter incorporates two user-switchable down-convert modes), and the original antenna may perform poorly on the higher FM band. Another problem is that RDS is not used in Japan, whereas most modern car radios available in Europe use this system. Also the converter may not allow pass-through of the MW band (if desired). A better solution is to replace the radio and antenna with ones designed for the country where the car will be used, but this can be difficult where custom-built radios are fitted.
Around 2007, a tower crew was welding stiffeners to the cross-members of the KTXT-TV tower in order to strengthen it for the heavier load an added digital TV antenna would require. It was during this work that the KTXT-FM antenna was significantly damaged. The antenna was eventually replaced by an antenna donated by Clear Channel Communications of Lubbock. The donated antenna was formerly used by 98 Kool (KCCL-FM), and was sent to the factory, refurbished and re-tuned for 88.1.
TV and FM (frequency modulated ) radio transmitter stations as well as transposer stations are almost always built on top of hills. A single station may have many transmitters both for TV and FM. In rare cases, each transmitter has an antenna system. But in stations where many transmitters are used, this is not always possible, so the outputs of transmitters transmitting in the same frequency band are combined by a diplexer and applied to a single antenna system. (i.e. VHF 1, VHF 2, VHF 3, UHF). If two or more antenna systems have to be used, higher frequency antennas are mounted higher on the antenna mast. (The sequence of antenna systems on a typical TV-FM station may be from bottom to top; VHF-2, VHF-3 and UHF.)
Microwave stations are also high altitude stations. Although high altitude is desirable also in GSM, the operators may use low power intracity stations for areas of high population density.
The original antenna was built primarily for Clear Channel Communications (now iHeartMedia, Inc.) as a backup transmitter site for its four FM stations. It was replaced between 2002 and 2003, with a mast to broadcast television and radio signals as a backup transmission site. This was done so that work could be completed to transfer those that were displaced by the destruction of the World Trade Center to the Empire State Building, without disruption to the existing FM tenants at the Empire State Building. The mast has four tiers: The top for WJLP, one for VHF, one for UHF, and one for FM. Currently, twelve FM stations use the site as a backup, and four—WBGO, WKCR-FM, WNYE, WBAI use it as a primary site. (WBGO does not use the master antenna, they have their own installed antenna below). One FM translator, W220EJ (repeats WFMU), also uses the tower. Two TV stations are using the mast for auxiliary use, and one for primary. The antenna systems and mast were constructed by Dielectric Communications of Raymond, Maine, Shively Labs of Bridgton, Maine, and Electronics Research Inc., of Chandler, Indiana.
A TV aerial plug is a colloquial name for a connector used to connect coaxial cables with each other and with terrestrial VHF/UHF roof antennas, antenna signal amplifiers, CATV distribution equipment, TV sets and FM / DAB-radio receivers.
SMATV is Single Master Antenna Television (or Satellite Master Antenna Television),
The purpose of SMATV is for supplying and controlling the number and type of channels to multiple televisions. Not only TV channels but FM channels as well. It provides Reception of DBS TV/FM channels for hotels, motels, dormitories, schools, hospitals and commercial properties with multiple tenants. Using a master antenna system video signals, audio signals and decoder signals can also be distributed.
As WRGB has returned to channel 6, it has proposed an unconventional approach, by which it has requested to operate an analog FM radio transmitter at one edge of its digital TV allocation, using vertical polarization to retain compatibility with standard broadcast car radio receivers. According to WRGB's site, "We hope that the FCC will allow us to continue to operate on 87.7. We are building a unique transmitter for 87.7 that can operate simultaneously with our DTV signal on channel 6. TV transmissions always use horizontal antennas. Our new 87.7 transmitter will be vertically polarized. The use of vertical polarization for 87.7 will allow reception of our audio in a car radio or any other FM radio with a whip type antenna. "
SGH-T889 is known to support dual-cell HSPA+ up to 42.2 Mbit/s.Only some Galaxy Note II variants have a built-in FM radio tuner. For example, some US and Canadian variants (SGH-i317, SGH-i317M) and the LTE International version (N7105) lack the FM radio tuner support. SC-02E for Japan market has 1seg digital-TV tuner and antenna. Korean variants have the T-DMB tuner as well as the T-DMB antenna that can be concealed in the phone body.
Löffelstelzen Transmitter is a broadcasting facility of SWR at Bad Mergentheim-Löffelstelzen in northern Baden-Württemberg, Germany. It was inaugurated at the beginning of the 1950s and used at those days a guyed mast, which was insulated against ground, because it was used for medium-wave broadcasting with a butterfly antenna for FM- and TV-transmission on its top. Later this mast was replaced by a concrete tower, which carried an antenna for FM-/TV-broadcasting on its top and a cage and a wire antenna for medium-wave broadcasting at its site.
This tower was replaced between 1998 and 2000 by a 179 metre tall concrete tower. This tower is not equipped with an antenna for medium wave broadcasting, because this was ceased in 2000 at the Löffelstelzen transmission site.
WSTR FM shares a tower with WPBA TV 30, and in fact shares the same antenna with WSB-FM 98.5 and WVEE FM 103.3. The three radio stations' transmitters are diplexed together, so that they all feed to the radio antenna instead of into each other.
Many TV tuners can function as FM radios; this is because there are similarities between broadcast television and FM radio. The FM radio spectrum is close to (or even inside) that used by VHF terrestrial TV broadcasts. And many broadcast television systems around the world use FM audio. So listening to an FM radio station is simply a case of configuring existing hardware.
Poor Mountain is the location of several broadcasting antennas for radio and television stations in the Roanoke, Virginia-Lynchburg, Virginia Designated Market Area (DMA). On the apex of the mountain in what's referred to as an "antenna farm" are the broadcasting antennas on towers for radio stations WVTF(FM) 89.1, licensed to the Virginia Tech Foundation, Inc.; WXL60 (VHF-FM) 162.475 MHz (NOAA Weather Radio), licensed to NOAA, National Weather Service; W220BD 91.9, licensed to Family Radio; and three radio stations licensed to Mel Wheeler, Incorporated, WXLK(FM) 92.3; WSLC-FM 94.9; and WSLQ(FM) 99.1. Digital television stations located in the antenna farm are WBRA-TV 3 (PSIP Channel 15), WDBJ-TV 18 (PSIP Channel 7), WSLS-TV 30 (PSIP Channel 10), WFXR-TV 17 (PSIP Channel 27), WPXR-TV 36 (PSIP Channel 38), and WEDD-LD 26. All of these stations are licensed to Roanoke. Other telecommunication antennas and towers for local, county, state and national public service, are also located on Poor Mountain, and their flashing Federal Aviation Authority tower lights can be seen from dozens of miles away, especially at night.
ERP for FM radio in the United States is always relative to a theoretical reference half-wave dipole antenna. (That is, when calculating ERP, the most direct approach is to work with antenna gain in dBd). To deal with antenna polarization, the Federal Communications Commission (FCC) lists ERP in both the horizontal and vertical measurements for FM and TV. Horizontal is the standard for both, but if the vertical ERP is larger it will be used instead.
Half-wave folded dipoles are often used for FM radio antennas; versions made with twin lead which can be hung on an inside wall often come with FM tuners. The T2FD antenna is a folded dipole. They are also widely used as driven elements for rooftop Yagi television antennas.
The FM- and TV-mast Hosingen carries antennas at a height of 285 metres, pointed toward Germany. These antennas are used for transmitting the German-speaking program of RTL on 97,0 MHz with an ERP of 100 kW. The antennas for the transmission of the native radio station on 92,5 MHz with an ERP of 50 kW are mounted at a height of 237 metres. As transmission device for both frequencies, Telefunken S 3217 transmitters with an output power of 10 kW is used. For each frequency there is also a backup transmitter installed, with an output power of 10 kW, a Telefunken S 3152.
The station's studios and offices are located at the WSB Television and Radio Group building on West Peachtree Street in Midtown Atlanta, which is shared with its TV and radio partners. WSB-FM shares a tower with WPBA TV 30, and in fact shares the same antenna with WSTR-FM/94.1 and WVEE-FM/103.3. The three stations' transmitters are diplexed together, so that they all feed to the antenna instead of into each other.