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WLTJ
WLTJ (92.9 FM, "Q92.9") is a commercial radio station in Pittsburgh, Pennsylvania. It is owned by The Frischling Family, through licensee WPNT Media Subsidiary, LLC, and broadcasts a hot adult contemporary radio format. The studios are in Pittsburgh's North Hills suburbs at 5000 McKnight Road. The transmitter is in the Summer Hill neighborhood of Pittsburgh at (). The tower is co-located with WPGH-TV and WPNT. WLTJ is a grandfathered "superpower" station. While the station's effective radiated power (ERP) is within the maximum limit allowed for a Class B FM station, its antenna height above average terrain (HAAT) is too tall for its ERP according to current FCC rules. WLTJ broadcasts using HD Radio technology. It offers three additional digital subchannels as well as its main analogue programming. History Early years On November 19, 1940, Westinghouse Radio Stations, Inc. applied to the Federal Communications Commission (FCC) for a construction permit. It wanted to bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westinghouse Broadcasting
The Westinghouse Broadcasting Company, also known as Group W, was the broadcasting division of Westinghouse Electric Corporation. It owned several radio and television stations across the United States and distributed television shows for syndication. Westinghouse Broadcasting was formed in the 1920 as Westinghouse Radio Stations, Inc. It was renamed Westinghouse Broadcasting Company in 1954, and adopted the ''Group W'' moniker on May 20, 1963. It was a self-contained entity within the Westinghouse corporate structure; while the parent company was headquartered in Pittsburgh, Pennsylvania, Westinghouse Broadcasting maintained headquarters in New York City. It kept national sales offices in Chicago and Los Angeles. Group W stations are best known for using a distinctive corporate typeface, introduced in 1963, for their logos and on-air imaging. Similarly styled typefaces had been used on some non-Group W stations as well and several former Group W stations still use it today. The G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WPNT
WPNT (channel 22) is a television station in Pittsburgh, Pennsylvania, United States, affiliated with MyNetworkTV. It is owned by Sinclair Broadcast Group alongside Fox affiliate WPGH-TV (channel 53). Both stations share studios on Ivory Avenue in the city's Summer Hill section, where WPNT's transmitter is also located. History Early history of channel 22 The channel 22 allocation dates back to the 1950s, and was initially acquired by public interest groups as a "backup" plan if the groups were not able to acquire the channel 13 allocation for public television. The groups were in a battle with locally-based Westinghouse Electric Corporation (owners of KDKA radio), who wanted the channel 13 allocation for the proposed KDKA-TV. However, as Westinghouse later gave the groups their blessing to use channel 13 for what would become WQED (Westinghouse bought WDTV from struggling DuMont and transformed that station into KDKA-TV instead), WQED was now stuck with two TV licenses but f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WRRK
WRRK (96.9 FM, "96.9 BOB-FM") is a variety hits radio station licensed to Braddock, Pennsylvania, serving Pittsburgh, Pennsylvania and owned by Saul Frischling, through licensee WPNT Media Subsidiary, LLC. Its studios are located at 5000 McKnight Road (Suite 401) in Pittsburgh's North Hills, and the transmitter tower is in the city's Hazelwood neighborhood. History WRRK was previously the call sign of a top 40/rock station in Manistee, Michigan. This station was first issued a construction permit to Matta Broadcasting Company, which owned an AM station known then as WLOA (now WZUM), also licensed to Braddock. Matta Broadcasting first applied for the frequency in November 1957, and was granted the permit in February 1958. Studios were co-located with the AM station at 1233 Braddock Avenue in Braddock, with the station signing on as WLOA-FM on June 1, 1959. Transmitter facilities were located on a hill just northeast of Braddock. As WLOA was a daytime-only station at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FM Broadcasting
FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio. FM broadcasting is capable of higher fidelity—that is, more accurate reproduction of the original program sound—than other broadcasting technologies, such as AM broadcasting. It is also less susceptible to common forms of interference, reducing static and popping sounds often heard on AM. Therefore, FM is used for most broadcasts of music or general audio (in the audio spectrum). FM radio stations use the very high frequency range of radio frequencies. Broadcast bands Throughout the world, the FM broadcast band falls within the VHF part of the radio spectrum. Usually 87.5 to 108.0 MHz is used, or some portion thereof, with few exceptions: * In the former Soviet republics, and some former Eastern Bloc countries, the older 65.8–74 MHz band ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
929wltj
9 (nine) is the natural number following and preceding . Evolution of the Arabic digit In the beginning, various Indians wrote a digit 9 similar in shape to the modern closing question mark without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a -look-alike. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic. While the shape of the glyph for the digit 9 has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in . The mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary component parts of all electronic devices that communicate by radio, such as radio and television broadcasting stations, cell phones, walkie-talkies, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term ''transmitter'' is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Subchannel
In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel. This is done by using data compression techniques to reduce the size of each individual program stream, and multiplexing to combine them into a single signal. The practice is sometimes called " multicasting". ATSC television United States The ATSC digital television standard used in the United States supports multiple program streams over-the-air, allowing television stations to transmit one or more subchannels over a single digital signal. A virtual channel numbering scheme distinguishes broadcast subchannels by appending the television channel number with a period digit (".xx"). Simultaneously, the suffix indicates that a television station offers additional programming streams. By convention, the suffix position ".1" is normally used to refer to the station's main dig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD Radio
HD Radio (HDR) is a trademark for an in-band on-channel (IBOC) digital radio broadcast technology. It generally simulcasts an existing analog radio station in digital format with less noise and with additional text information. HD Radio is used primarily by AM and FM radio stations in the United States, Canada, and Mexico, with a few implementations outside North America. The term "on channel" is a misnomer because the system actually broadcasts on the ordinarily unused channels adjacent to an existing radio station's allocation. This leaves the original analog signal intact, allowing enabled receivers to switch between digital and analog as required. In most FM implementations, from 96 to 128 kbps of capacity is available. High-fidelity audio requires only 48 kbps so there is ample capacity for additional channels, which HD Radio refers to as "multicasting". HD Radio is licensed so that the simulcast of the main channel is royalty-free. The company makes its money ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Height Above Average Terrain
Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site is above the surrounding landscape. HAAT is used extensively in FM radio and television, as it is more important than effective radiated power (ERP) in determining the range of broadcasts (VHF and UHF in particular, as they are line of sight transmissions). For international coordination, it is officially measured in meters, even by the Federal Communications Commission in the United States, as Canada and Mexico have extensive border zones where stations can be received on either side of the international boundaries. Stations that want to increase above a certain HAAT must reduce their power accordingly, based on the maximum distance their station class is allowed to cover (see List of North American broadcast station classes for more information on this). The FCC procedure to calculate HAAT is: from the proposed or actual antenna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of North American Broadcast Station Classes
This is a list of broadcast station classes applicable in much of North America under international agreements between the United States, Canada and Mexico. Effective radiated power (ERP) and height above average terrain (HAAT) are listed unless otherwise noted. All radio and television stations within of the US-Canada or US-Mexico border must get approval by both the domestic and foreign agency. These agencies are Industry Canada/Canadian Radio-television and Telecommunications Commission (CRTC) in Canada, the Federal Communications Commission (FCC) in the US, and the Federal Telecommunications Institute (IFT) in Mexico. AM Station class descriptions All domestic (United States) AM stations are classified as A, B, C, or D. * A (formerly I) — clear-channel stations — 10 kW to 50 kW, 24 hours. **Class A stations are only protected within a radius of the transmitter site. **The old Class I was divided into three: Class I-A, I-B and I-N. NARBA distinguis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effective Radiated Power
Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter. It is the total power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength or power flux density in watts per square meter) as the actual source antenna at a distant receiver located in the direction of the antenna's strongest beam ( main lobe). ERP measures the combination of the power emitted by the transmitter and the ability of the antenna to direct that power in a given direction. It is equal to the input power to the antenna multiplied by the gain of the antenna. It is used in electronics and telecommunications, particularly in broadcasting to quantify the apparent power of a broadcasting station experienced by listeners in its reception area. An alternate parameter that measures the same thing is ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grandfather Clause
A grandfather clause, also known as grandfather policy, grandfathering, or grandfathered in, is a provision in which an old rule continues to apply to some existing situations while a new rule will apply to all future cases. Those exempt from the new rule are said to have grandfather rights or acquired rights, or to have been grandfathered in. Frequently, the exemption is limited, as it may extend for a set time, or it may be lost under certain circumstances; for example, a grandfathered power plant might be exempt from new, more restrictive pollution laws, but the exception may be revoked and the new rules would apply if the plant were expanded. Often, such a provision is used as a compromise or out of practicality, to allow new rules to be enacted without upsetting a well-established logistical or political situation. This extends the idea of a rule not being retroactively applied. Origin Southern United States The term originated in late nineteenth-century legislation an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
