(Community Antenna TV) The original name for cable TV. Dating back to the late 1940s, a cable company would place an antenna at the highest location in the community and string cables to homes in neighborhoods with hilly terrain or other interference.
What is the CATV for?
Community Access Television (CATV) is also commonly known as Cable TV. CATV is one of the most common methods of transmitted television signals to a consumer's home, using radio frequency signals transmitted through coaxial cable.
In a coaxial cable like the one that brings CATV signals to your house, radio signals travel at about two-thirds the speed of light. When the broadcast and cable signals get to the television tuner a fraction of a second apart, you see a double image called "ghosting."
|DTV||Disc Thickness Variation (automotive disc brakes)|
|DTV||Durchschnittliche Tägliche Verkehrsstärke (German: Average Daily Traffic Volume)|
|DTV||Digital Thermostatic Valve (Kohler)|
Digital television (DTV) is the transmission of television signals, including the sound channel, using digital encoding, in contrast to the earlier television technology, analog television, in which the video and audio are carried by analog signals.
An Ethernet crossover cable is a type of twisted pair Ethernet cable used to connect computing devices together directly that would normally be connected via a network switch, Ethernet hub or router, such as directly connecting two personal computers via their network adapters.
The Oshkosh M-ATV is a Mine Resistant Ambush Protected (MRAP) vehicle developed by the Oshkosh Corporation of Oshkosh, Wisconsin for the MRAP All Terrain Vehicle (M-ATV) program.
Mine-Resistant Ambush Protected (MRAP; /ˈ?mræp/ EM-rap) is a term for United States military vehicles produced as part of the MRAP program that are designed specifically to withstand improvised explosive device (IED) attacks and ambushes.
SMATV stands for Satellite Master Antenna Television and refers to a system that uses multiple satellite and broadcast signals to create a single integrated cable signal for distribution to a cabling network. In other words, with an SMATV system, you can become your own in-house cable company.
Television receive-only (TVRO) is a term used chiefly in North America to refer to the reception of satellite television from FSS-type satellites, generally on C-band analog; free-to-air and unconnected to a commercial DBS provider.
C Band is the original frequency allocation for communications satellites. C-Band uses 3.7-4.2GHz for downlink and 5.925-6.425Ghz for uplink. The lower frequencies that C Band uses perform better under adverse weather conditions than the Ku band or Ka band frequencies.
The following bands are commonly used: - C-band was the first band to be used for satellite communication systems. However, when the band became overloaded (due to the same frequency being used by terrestrial microwave links) satellites were built for the next available frequency band, the Ku-band.
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz). The 10 cm radar short-band ranges roughly from 1.55 to 5.2 GHz.
Low-frequency radar is radar which uses frequencies lower than 1 GHz such as L-band, UHF, VHF, and HF, as opposed to the usual radar bands, which range from 2 GHz and up, and the maximum is 40 GHz.The radar cross section of any target depends on the radar transmitted frequency.
C band may refer to: C band (IEEE), a radio frequency band from 4 to 8 GHz. C band (infrared), an infrared band from 1530 to 1565 nm. C band (NATO), a radio frequency band from 500 MHz to 1 GHz.
UHF Versus VHF. The idea that UHF wireless systems are inherently better than VHF systems is widespread. However, interference due to electrical equipment, digital devices, computers and other electronic equipment is generally lower at UHF frequencies.
Nearly all C-band communication satellites use the band of frequencies from 3.7 to 4.2 GHz for their downlinks, and the band of frequencies from 5.925 to 6.425 GHz for their uplinks. Note that by using the band from 3.7 to 4.0 GHz, this C-band overlaps somewhat into the IEEE S-band for radars.
L band refers to the operating frequency range of 1–2 GHz in the radio spectrum. The wavelength range of L band is 30–15 cm. The L band is one of the chief operating ranges used by various applications such as radars, global positioning systems (GPS), radio, telecommunications and aircraft surveillance.
|Band||Frequency Range||Origin of Name|
|X||8 to 12 GHz||Used in WW II for fire control, X for cross (as in crosshair)|
|Ku||12 to 18 GHz||Ku for "kurz-under".|
|K||18 to 26 GHz||German "kurz" means short, yet another reference to short wavelength.|
|Ka||26 to 4-0||Ka for "kurz-above".|