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The last new three-letter call was assigned to station WIS (now WVOC) in Columbia, South Carolina on January 23, 1930. Since then, three-letter calls have only been assigned to stations, including FM (beginning in 1943) [1] and TV (beginning in 1946), [2] which are historically related to an AM station that was originally issued that call sign.
(KAZA-TV transmits over low-power KHTV-CD's spectrum, but is included as it is classified as a full-power license.) A blue background indicates a station transmitting in the ATSC 3.0 format over-the-air; details about the station's alternate availability in the original ATSC format are contained in its article.
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Antenna TV – Antenna TV is a digital multicast network owned by Nexstar Media Group; launched on January 1, 2011, the network carries classic series from the 1950s to the 1970s sourced from the programming libraries of Sony Pictures Television, NBCUniversal Syndication Studios and Disney Platform Distribution, as well as other distributors.
Noise temperature (antenna) In radio frequency (RF) applications such as radio, radar and telecommunications, noise temperature of an antenna is a measure of the noise power density contributed by the antenna to the overall RF receiver system. It is defined as "the temperature of a resistor having an available thermal noise power per unit ...
The upper antenna is a Yagi design. UHF television broadcasting is the use of ultra high frequency (UHF) radio for over-the-air transmission of television signals. UHF frequencies are used for both analog and digital television broadcasts. UHF channels are typically given higher channel numbers, like the US arrangement with VHF channels ...
Antenna gain-to-noise-temperature ( G/T) is a figure of merit in the characterization of antenna performance, where G is the antenna gain in decibels at the receive frequency, and T is the equivalent noise temperature of the receiving system in kelvins. The receiving system noise temperature is the summation of the antenna noise temperature and ...
The "-DT" suffix was introduced as part of the later conversion of TV stations from analog to digital transmissions. During a transition period, digital TV stations were identified using -DT suffixed calls, with the base call staying the same as the one assigned to their analog sister station, e.g., WRC-DT was paired with WRC-TV, etc.