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CBOT-DT logo.png
CityOttawa, Ontario
BrandingCBC Ottawa (general)
CBC Ottawa News (newscasts)
AffiliationsCBC Television
OwnerCanadian Broadcasting Corporation
First air date
June 2, 1953 (70 years ago) (1953-06-02)
Former call signs
CBOT (1953–2011)
Former channel number(s)
4 (VHF, 1953–2011)
Call sign meaning
CBC Ottawa Television
Technical information
Licensing authority
ERP311.485 kW
HAAT426.4 m (1,399 ft)
Transmitter coordinates45°30′11″N 75°51′1″W / 45.50306°N 75.85028°W / 45.50306; -75.85028 (CBOT)
WebsiteCBC Ottawa

CBOT-DT (channel 4) is a CBC Television station in Ottawa, Ontario, Canada. It is part of a twinstick with Ici Radio-Canada Télé station CBOFT-DT (channel 9). Both stations share studios at the CBC Ottawa Production Centre on Queen Street (across from the Confederation Line light rail station) in Downtown Ottawa, alongside the main corporate offices of the CBC; CBOT-DT's transmitter is located on the Ryan Tower at Camp Fortune in Chelsea, Quebec, north of Gatineau.


Channel 4 logo used by CBOT for several years in the early 1980s.

CBOT went on the air for the first time on June 2, 1953, becoming the third television station in Canada. Before the launch of Télévision de Radio-Canada station CBOFT, CBOT aired both English and French-language programs.

During the late 1970s into the early 1980s, CBOT was known as "CBC 4 Ottawa", and its newscasts were known as CBC 4 News. In 1980, CBOT's 6 p.m. newscast was anchored by Ab Douglas, and by Joe Spence at 11:27, following The National. During the mid-1980s, the station was known as "CBOT 4", now "CBC Ottawa".

News operation[edit]

CBOT-DT presently broadcasts 10 hours, 40 minutes of locally produced newscasts each week (with two hours each weekday, a half-hour on Saturdays and ten minutes on Sundays). CBOT airs local news programming in the form of a 90-minute newscast from 5 to 6:30 p.m. and a half-hour newscast at 11 p.m. on weekdays. On weekends, the station airs a half-hour 6 p.m. newscast on Saturdays and a ten-minute summary airs on Sundays at 11 p.m.

Notable current on–air staff[edit]

Notable former on–air staff[edit]

Technical information[edit]


Channel Video Aspect Short name Programming[1]
4.1 720p 16:9 CBOT-DT Main CBOT-DT programming / CBC Television

Analogue-to-digital conversion[edit]

On August 31, 2011, when Canadian television stations in CRTC-designated mandatory markets transitioned from analogue to digital broadcasts,[2] the station's digital signal remained on UHF channel 25. However, through the use of PSIP, digital television receivers display CBOT-DT's virtual channel as 4.1.


CBOT operated six analog television rebroadcasters in Eastern Ontario and included communities such as Pembroke. Due to federal funding reductions to the CBC, in April 2012, the CBC responded with substantial budget cuts, which included shutting down CBC's and Radio-Canada's remaining analog transmitters on July 31, 2012.[3] None of CBC's or Radio-Canada's television rebroadcasters were converted to digital.

Former rebroadcasters of CBOT[edit]

Station City of licence Channel ERP HAAT Transmitter coordinates CRTC/Notes
CBOT-1 Foymount 14 (UHF) 42.3 kW 229.2 m 45°25′48″N 77°18′14″W / 45.43000°N 77.30389°W / 45.43000; -77.30389 (CBOT-1) 91-638
CBOT-2 Barry's Bay 19 (UHF) 8.6 kW 170.4 m 45°29′23″N 77°42′56″W / 45.48972°N 77.71556°W / 45.48972; -77.71556 (CBOT-2)
CBOT-3 Whitney 9 (VHF) 0.01 kW NA 45°29′18″N 78°12′22″W / 45.48833°N 78.20611°W / 45.48833; -78.20611 (CBOT-3)
CBOT-4 Maynooth 51 (UHF) 1.535 kW 121.5 m 45°13′37″N 77°52′29″W / 45.22694°N 77.87472°W / 45.22694; -77.87472 (CBOT-4)
CBOT-5 McArthur's Mills 33 (UHF) 4.286 kW 125.3 m 45°5′18″N 77°38′49″W / 45.08833°N 77.64694°W / 45.08833; -77.64694 (CBOT-5)
CBOT-6 Deep River/
3 (VHF) 43.3 kW 152.2 m 46°2′40″N 77°28′4″W / 46.04444°N 77.46778°W / 46.04444; -77.46778 (CBOT-6) 90-1077


External links[edit]