Telecorporación Salvadoreña since 1985. The channel was founded on December 4, 1958 and began broadcasting one month later as a YSU signal operated by Canal Cuatro S.A. de C.V.(El Salvador) is the second Salvadoran channel owned by
YSU-TV (Canal 4)
Canal 4 debuted with a mailman who checks the primitive television. The TV screen showed as a hybrid name: The big letters were "TV" and the words "Canal 4" (Channel 4) below. Outside of the television, the logo showed the callsign on the top left position.
Canal 4's iconic logo has showed essentially the same since 1966 using a simple as the number four inside of the eye, basing on the CBS logo it's symbolized as a vision of TV spectator. The early version of the iconic logo consists the Old Vintage TV Screen with a red color, although the logo was in black and white on screen before 1974.
In July 1969, the Canal 4's logo was revised, with a red shape changed to the rounded 4:3 square. As a result, the previous logo was gradually phased out in 1970. A major reason for this change was television screens evolved to be more quadrilateral on a screen. Also, the circle of the eye logo has been slightly reduced to accurate the eye concept and more similar to CBS logo inspiration, as the eye shape became rounded.
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