WROC-TV is Rochester's oldest television station, signing on June 11, 1949, as WHAM-TV, an
NBC affiliate on channel 6. It was owned originally by
Stromberg-Carlson, a telephone equipment manufacturer, along with
WHAM radio. The station was also affiliated with the now-defunct
DuMont Television Network. WHAM-TV moved to channel 5 on July 24, 1954, as part of a revision of upstate New York's VHF allotments resulting from the
Federal Communications Commission (FCC)'s
Sixth Report and Order of 1952. However, WHAM-TV on channel 5 dealt with interference issues from
CBLT, a
CBC Television station from
Toronto, after that station moved from its original channel 9 allocation to channel 6 in 1956. CBLT was replaced on channel 9 by
CFTO-TV in 1960, and that channel relocation would later play an indirect role in the station's second frequency shift, eight years later. Stromberg-Carlson merged with
General Dynamics in 1955. General Dynamics was not interested in owning broadcast outlets, and put the WHAM radio and television outlets on the market. In 1956, WHAM-TV was sold to Transcontinent Broadcasting, which owned
WGR radio and
WGR-TV in
Buffalo; the new owners changed the call sign to the current WROC-TV. In 1961, Transcontinent sold the station to Veterans Broadcasting Company, which subsequently sold its half of what is today
WHEC-TV (channel 10) to the
Gannett Company, then based in Rochester. The acquisition by Veterans Broadcasting also gave WROC-TV new sister stations on radio, as WVET-AM-FM (1280 AM and 97.9 FM) changed their call signs to
WROC (AM) and WROC-FM. (The
WHAM-TV call sign is now used on Rochester's ABC affiliate, channel 13, previously known as WOKR. Other than the shared call sign, that station is unrelated to the earlier WHAM-TV.) Under Veterans' ownership, WROC-TV moved to channel 8 at 6 a.m. on September 9, 1962, as part of another channel allocation change, this one being a switch involving Rochester and
Syracuse. The FCC moved WROC-TV's former channel 5 east to Syracuse, and it was taken by
Meredith Corporation-owned WHEN-TV (now
WTVH), which was previously on channel 8. The move also allowed a new station on channel 9 to enter the Syracuse market; it signed on as WNYS-TV (later WIXT-TV and now
WSYR-TV) the same day. Veterans Broadcasting was merged into
Rust Craft Broadcasting in February 1965. Rust Craft sold its television unit to
Ziff Davis in 1979. This resulted in the breakup of the WROC stations, as WROC (AM) and
WPXY (the former WROC-FM) were later sold by Rust-Craft to members of the firm's broadcast management team. Within a few years, however, Ziff Davis broke up its television group; WROC-TV and sister stations
WEYI-TV in
Saginaw, Michigan,
WRDW-TV in
Augusta, Georgia, and
WTOV-TV in
Steubenville, Ohio, were spun-off to Television Station Partners LP, a group composed of Ziff Davis's broadcast executives, in 1983. Television Station Partners sold channel 8, along with the Saginaw and Steubenville outlets, to
Smith Broadcasting in 1996. Smith Broadcasting announced in 1999 that it would be selling WROC-TV to
Nexstar Broadcasting Group, making WROC-TV one of Nexstar's oldest stations. It was while under the stewardship of Television Station Partners that WROC-TV made another switch: In April 1989, NBC announced it would end its 40-year partnership with channel 8 and move its Rochester affiliation to then-CBS station WHEC-TV. This move was the result of WROC-TV's poor performance and constant preemptions of NBC network programming (NBC was very intolerant of preemptions at this time, and was the number one network at the time, adding to NBC's frustration with channel 8). WROC-TV agreed to terms to affiliate with CBS in May, and channel 8 soon began airing CBS' Saturday morning children's programs (with the notable exception of ''
Pee-wee's Playhouse) and daytime game shows Family Feud and Now You See It'', all of which had been preempted by WHEC-TV. Channel 8 began airing the full CBS schedule on August 13, 1989. For many years, WROC-TV was one of three Rochester area stations offered on cable in the
Ottawa–
Gatineau and
Eastern Ontario regions. The Rochester area stations were replaced with
Detroit stations when the microwave relay system that provided these signals was discontinued. Until January 2009, WROC-TV was also available in many
Central Ontario communities such as
Belleville,
Cobourg, and
Lindsay. On July 9, 2012, WROC-TV replaced
Louisville's
WLKY on
Time Warner Cable systems in that station's region, when WLKY's owners,
Hearst Television, pulled its stations off Time Warner Cable's systems in a retransmission dispute. However, Nexstar complained that Time Warner Cable has used their signals outside their markets without permission, while Time Warner Cable was within its rights to use their signals as replacements until a deal with Hearst is reached. WROC-TV, for its part, made the best of its predicament, naming the administrator of a
Facebook group of tongue-in-cheek Louisvillean WROC-TV fans its fan of the week and making a handful of other shout-outs to its emerging Louisville fanbase. The substitution of WROC-TV in place of WLKY lasted until July 19, 2012, when a deal was reached between Hearst and Time Warner. ==News operation==