Misplaced Pages

#128871

23-528: WATC may refer to: WATC-DT , a television station licensed to serve Atlanta, Georgia, United States Washington Terminal Company , a railroad company in Washington, D.C. (reporting mark WATC) " We Are the Champions " a 1977 Queen Song Weekend All Things Considered , U.S. weekend news program from National Public Radio Western Arkansas Technical Center , at

46-514: A construction permit for a fill-in broadcast translator in Union City, Georgia (southwestern metro Atlanta) on channel 36, which was vacated by analog WATL . It will have the same callsign as its parent station (with no extra numerals or other differentiation, despite not being a same-channel booster ) and could not be sold separately, as it is within a program the FCC created in 2009 in order to address

69-421: A distance greater than the line of sight is required. Occasionally when conditions are right, UHF radio waves can travel long distances by tropospheric ducting as the atmosphere warms and cools throughout the day. The length of an antenna is related to the length of the radio waves used. Due to the short wavelengths, UHF antennas are conveniently stubby and short; at UHF frequencies a quarter-wave monopole ,

92-507: A network made up of classic sitcoms, dramas, Westerns and films, all in the public domain . WATC launched on September 10, 1996. WATC granted permission to simulcast its signal on WSKC-CA (channel 22, also licensed to Atlanta), so that station could maintain its Class A status. WSKC-CA was located on the same broadcast tower as WATC, and could continue broadcasting in analog even after WATC went digital-only in February 2009. However, it

115-428: Is a considerable amount of lawful unlicensed activity (cordless phones, wireless networking) clustered around 900 MHz and 2.4 GHz, regulated under Title 47 CFR Part 15 . These ISM bands —frequencies with a higher unlicensed power permitted for use originally by Industrial, Scientific, Medical apparatus—are now some of the most crowded in the spectrum because they are open to everyone. The 2.45 GHz frequency

138-530: Is for cellphones , allowing handheld mobile phones be connected to the public switched telephone network and the Internet . Current 3G and 4G cellular networks use UHF, the frequencies varying among different carriers and countries. Satellite phones also use this frequency in the L band and S band . UHF channels are used for digital television broadcasting on both over the air channels and cable television channels . Since 1962, UHF channel tuners (at

161-452: Is the standard for use by microwave ovens , adjacent to the frequencies allocated for Bluetooth network devices. The spectrum from 806 MHz to 890 MHz (UHF channels 70 to 83) was taken away from TV broadcast services in 1983, primarily for analog mobile telephony . In 2009, as part of the transition from analog to digital over-the-air broadcast of television , the spectrum from 698 MHz to 806 MHz (UHF channels 52 to 69)

184-645: The UHF radar band as frequencies between 300 MHz and 1 GHz. Two other IEEE radar bands overlap the ITU UHF band: the L band between 1 and 2 GHz and the S band between 2 and 4 GHz. Radio waves in the UHF band travel almost entirely by line-of-sight propagation (LOS) and ground reflection; unlike in the HF band there is little to no reflection from the ionosphere ( skywave propagation), or ground wave . UHF radio waves are blocked by hills and cannot travel beyond

207-675: The UHF band fall into the super-high frequency (SHF) or microwave frequency range. Lower frequency signals fall into the VHF ( very high frequency ) or lower bands. UHF radio waves propagate mainly by line of sight ; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for television broadcasting , cell phones , satellite communication including GPS , personal radio services including Wi-Fi and Bluetooth , walkie-talkies , cordless phones , satellite phones , and numerous other applications. The IEEE defines

230-469: The UHF spectrum is used worldwide for land mobile radio systems, two-way radios used for voice communication for commercial, industrial, public safety, and military purposes. Examples of personal radio services are GMRS , PMR446 , and UHF CB . The most rapidly-expanding use of the band is Wi-Fi ( wireless LAN ) networks in homes, offices, and public places. Wi-Fi IEEE 802.11 low band operates between 2412 and 2484 MHz. A second widespread use

253-512: The University of Arkansas Western Australian Theatre Company , a theatre company in Perth from 1985 to 1990 Western Australian Turf Club , Thoroughbred racing club of WA Wichita Area Technical College , former name of Wichita State University Campus of Applied Sciences and Technology Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with

SECTION 10

#1732868729129

276-463: The attenuation increases with frequency. UHF TV signals are generally more degraded by moisture than lower bands, such as VHF TV signals. As the visual horizon sets the maximum range of UHF transmission to between 30 and 40 miles (48 to 64 km) or less, depending on local terrain, the same frequency channels can be reused by other users in neighboring geographic areas ( frequency reuse ). Radio repeaters are used to retransmit UHF signals when

299-429: The horizon, but can penetrate foliage and buildings for indoor reception. Since the wavelengths of UHF waves are comparable to the size of buildings, trees, vehicles and other common objects, reflection and diffraction from these objects can cause fading due to multipath propagation , especially in built-up urban areas. Atmospheric moisture reduces, or attenuates , the strength of UHF signals over long distances, and

322-530: The most common omnidirectional antenna is between 2.5 and 25 cm long. UHF wavelengths are short enough that efficient transmitting antennas are small enough to mount on handheld and mobile devices, so these frequencies are used for two-way land mobile radio systems , such as walkie-talkies , two-way radios in vehicles, and for portable wireless devices ; cordless phones and cell phones . Omnidirectional UHF antennas used on mobile devices are usually short whips , sleeve dipoles , rubber ducky antennas or

345-633: The original target date on which full-power television stations in the United States were to transition from analog to digital broadcasts under federal mandate (which was later pushed back to June 12, 2009). The station's digital signal remained on its pre-transition UHF channel 41. On June 18, it changed its broadcast callsign from WATC a few days after the Federal Communications Commission (FCC) announced that TV stations were free to add or drop "-DT" as easily as "-TV". WATC received

368-483: The planar inverted F antenna (PIFA) used in cellphones. Higher gain omnidirectional UHF antennas can be made of collinear arrays of dipoles and are used for mobile base stations and cellular base station antennas . The short wavelengths also allow high gain antennas to be conveniently small. High gain antennas for point-to-point communication links and UHF television reception are usually Yagi , log periodic , corner reflectors , or reflective array antennas . At

391-738: The shortcomings of the ATSC digital broadcast television system . Since ATSC is very prone to multipath interference , this may be due to reflected signals from the skyscrapers of downtown Atlanta and midtown Atlanta , as well as terrain shielding of the Chattahoochee River valley and the hills around it. The station formerly had a translator station, W42AO, licensed to Athens, Georgia . That station became WAGC-LD. Owner Carolina Christian Broadcasting, Inc. also owns WGGS-TV , its sister station in Greenville, South Carolina . In early May 2011,

414-414: The slot antenna or reflective array antenna are used: the slotted cylinder, zig-zag, and panel antennas. UHF television broadcasting channels are used for digital television , although much of the former bandwidth has been reallocated to land mobile radio system , trunked radio and mobile telephone use. Since at UHF frequencies transmitting antennas are small enough to install on portable devices,

437-498: The station added other religious programming called "WATC Too" on new channel 57.2. The station's signal is multiplexed : UHF Ultra high frequency ( UHF ) is the ITU designation for radio frequencies in the range between 300  megahertz (MHz) and 3  gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter ). Radio waves with frequencies above

460-517: The time, channels 14 to 83) have been required in television receivers by the All-Channel Receiver Act . However, because of their more limited range, and because few sets could receive them until older sets were replaced, UHF channels were less desirable to broadcasters than VHF channels (and licenses sold for lower prices). A complete list of US Television Frequency allocations can be found at Pan-American television frequencies . There

483-778: The title WATC . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=WATC&oldid=1171424761 " Categories : Disambiguation pages Broadcast call sign disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages WATC-DT WATC broadcasts programming from various Christian organizations and local and national churches over its two main channels, including World Harvest Television , The Inspiration Network , The Worship Network , Golden Eagle and The Shepherd's Chapel . Its third subchannel carries The Loop,

SECTION 20

#1732868729129

506-399: The top end of the band, slot antennas and parabolic dishes become practical. For satellite communication, helical and turnstile antennas are used since satellites typically employ circular polarization which is not sensitive to the relative orientation of the transmitting and receiving antennas. For television broadcasting specialized vertical radiators that are mostly modifications of

529-476: Was off-air as of March 2009, and remained so for most of the year. Since then, the station has moved to transmit digitally from a location near Norcross as WSKC-CD, and now airs Korean programming as it had previously done on analog before its affiliation with WATC. Despite the DTV Delay Act extending the deadline from February 17 to June 12, the station ended shut down its analog signal on February 17, 2009,

#128871