#White pattern website wallpaper tv
Audio and video noise received on Indian-head era TV sets respectively indicated the absence of analog aural and visual broadcast carriers. After an immediate transmitter power off, in lieu of the Indian-head test pattern and its sine wave tone, a TV viewer heard a loud audio hiss like FM radio interstation noise and saw the video noise. īy the end of the Indian-head TV era in the late-1970s/early-1980s, there was no nightly test pattern on stations where automatic logging and remote transmitter controls allowed shutdown of power immediately after the formal sign-off. In later years the test pattern was transmitted for as little as a minute after sign-off while the transmitter engineer logged required Federal Communications Commission-US/ Industry Canada transmitter readings before cutting power. įrom the late-1950s the test pattern gradually began to be seen less frequently, after fewer sign-offs, on fewer stations, and for shorter periods in the morning, since new and improved TV broadcast equipment required less adjusting. formal sign-on or even during the daylight morning hours on newer low-budget stations, which typically began their broadcast day with midday local programming around 10 or 11 a.m. The Indian-head pattern could variously be seen after sign-off but while the station was still transmitting while transmitting prior to a typical 6 a.m. The Indian head pattern was also used by Kuwait Television in Kuwait from its launch of television services in 1961 until it adopted colour television in the mid-1970s. The Indian head was also used in Brazil by Rede Tupi, both as a test pattern and as part of a television ident, from its launch in 1950 until it became the first Brazilian television network to adopt colour television in 1971–1972. Saudi Broadcasting Authority in Saudi Arabia also formerly used a modified version of the Indian head test pattern, with the Emblem of Saudi Arabia replacing the Indian head drawing, from 1954 until 1982 when it was replaced with a heavily modified Philips PM5544 test card. In Sweden the Indian head was used in test transmissions from the KTH Royal Institute of Technology in Stockholm alongside the RMA Resolution Chart 1946, Telefunken T05 test card, as well as other experimental test cards from Televerket and Chalmers University of Technology from 1948 until November 1958 when it was replaced by the Sveriges Radio TV (now Sveriges Television) test card. In the Dominican Republic, the Indian-head pattern was used by its public broadcaster Corporación Estatal de Radio y Televisión (CERTV) in the late-1960s and 1970s (in conjunction with the EIA 1956 resolution chart test card) after playing the National Anthem of the Dominican Republic at sign-off. Telesistema Mexicano (now Televisa) stations also used this test pattern until the late-1960s immediately after playing the Mexican national anthem at sign-off. This test pattern was later used by the Venezuelan TV channel Venevision, in conjunction with the RMA Resolution Chart 1946, until the late-1970s before signing on with the Venezuelan national anthem. It was also used by Rhodesia Television (RTV) during British colonial times (varying between Northern and Southern Rhodesia) following the playing of " God Save the Queen" at closedown. The Indian head was also used by the Canadian Broadcasting Corporation (CBC) in Canada in conjunction with its own monochrome test pattern, following the Canadian national anthem sign-off in the evening, and during its final years in the late-1970s and early-1980s it was shown before sign-on in the morning, after the showing of the SMPTE color bars. The Indian-head test pattern became familiar to the large baby boom TV audiences in America from 1947 onwards it would often follow the formal television station sign-off after the United States national anthem.
Swedish botanist and radio and TV personality Nils Dahlbeck ( sv 1911–1998) posing in front of the Indian-head test pattern (on his left) and the Chalmers University of Technology experimental TV station test card (on his right) in 1957.
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