DZNB-TV

DZNB-TV, Channel 4, is the flagship VHF station of the Philippine television network, NBS. The station is owned and operated by NBS Pilipinas Inc. with its studio and transmitter located at the NBS Broadcast Complex, Samar Avenue, Diliman, Quezon City. It is the first and oldest television station in the Philippines, operating 24 hours a day. It serves as the originating channel of the network's national television programming which is broadcast to all its regional stations.
== History ==
DZNB-TV traces its history to the first Philippine television station DZSV-TV, owned by Montecarlo Electronics Corporation and later renamed as Montecarlo Media Company.
Severino Montecarlo Jr., owner of MMC, was first to apply for a license to establish a TV station in 1941. But due to the war, his request was refiled on August 7, 1946 and was granted on November 19. Because of the strict import controls and the lack of raw materials needed to open a TV station during those days, Salvacion branched to radio broadcasting instead.
DZSV-TV began commercial television operations on March 12, 1949, the first fully licensed commercial television station in the Philippines. After the premiere telecast, the station followed a six-hour-a-day schedule, from four in the afternoon to ten in the evening.
The first program broadcast at 4:00 PHT during the then-called broadcast commencement exercises, with the playing of the national anthem of the Philippines "Lupang Hinirang", followed by an announcement of that day's programs and the commencement of MMC television programming.
In 1954, Cabanatuan Electronics Corporation owner Manolo Villarosa Sr. and Eduardo Villarosa acquired a radio-TV franchise from Congress and immediately established Villarosa Broadcasting Company (VBC) on July 18, 1954. On October 10, 1957, VBC was bought. The corporate name was changed to National Broadcasting System immediately after the purchase of VBC.
With the establishment of DZEB-TV 10 of MBS in 1955, the Montecarlos controlled both television channels in the archipelago, and plans were underway to build a new headquarters for the network in Samar Avenue in Quezon City, which was officially opened at the same year, and later became the official studios for Channels 4 and 10. The monopoly in television was broken the same year when DCBS-TV 3 and DNBC-TV 9 was established by their respective owners. By 1957, with the official launch of its first ever regional station in Cebu, the NBS brand was officially used for the first time on the station in newspaper ads promoting the first ever locally produced television dramas.
Channel 2 and 10 started test color broadcasts in 1959.
In 1962, NBS became the first TV station to broadcast selected shows in color and by 1963, the company was renamed NBS Media Corporation. This company became the formal merger of the two stations DMMC-TV 4 (MMC) and DVBC-TV 10 (VBC) and were both named NBS, only separated by 1 and 2 to avoid confusion.
On November 11, 1965, NBS opened its present-day Broadcast Center complex in Bohol Avenue, Quezon City; it was then the second most advanced broadcasting facility of its kind during its time in Asia after NHK in Japan and ABS-CBN also in the Philippines in 1967.
On March 12, 1969, on its 20th anniversary, its sister station DVBC-TV transferred to channel 12 (now occupied by SIDtv). This was in response to frequency adjustments, as the television station of the EMedia was launched and occupied the Channel 10 frequency.
==Digital television==
===Digital channels===
UHF Channel 23 (527.143 MHz)
Channel	Video	Aspect	PSIP Short Name	Programming 	Note
1.01 	480i 	16:9 	NBS 	NBS 	Commercial broadcast
1.02 	480i 	16:9 	VINTA 	Vinta 	Commercial broadcast
1.03 	480i 	16:9 	SINE NATIN 	SineNatin 	Commercial broadcast
1.04 	480i 	16:9 	KYDS 	NBS Kyds 	Commercial broadcast
1.05 	480i 	16:9 	SINAG 	Sinag News Channel	Commercial broadcast
1.06 	480i 	16:9 	NBS MOVIE CITY 	NBS Movie City 	Pay per view
1.31 	240p 	16:9 	NBS OneSeg 	NBS 	1seg
UHF Channel 17 (491.143 MHz)
Channel	Video	Aspect	PSIP Short Name	Programming	Note
4.01 	480i 	16:9 	TVKAALAMAN 	TVKaalaman 	Test broadcast
4.02 	480i 	16:9 	AsiaNet 	NBS AsiaNet	Test broadcast
4.03 	480i 	16:9 	MUSICA 	Musica 	Test broadcast
4.04 	480i 	16:9 	NBS KLASIKS 	NBS Klasiks	Test broadcast
4.05 	1080i	16:9 	NBS HD 	NBS 	Test broadcast
4.31 	240p 	16:9 	VINTA ONESEG 	Vinta 	1seg
== Gallery ==
NBStestcard1981.jpeg|Testcard from 1966
NMBStestcard1962.jpeg|Testcard before 1966
D37740BA-84DA-470D-82DE-3FD7087DCB47.jpeg|Screencap from pre-MTRCB years
E8E1ED67-5931-4723-9B8C-4502C6FCFA96.jpeg|Screencap during the 9/11 report.
29175990-C80D-4854-A606-A645C0A6BEF5.jpeg
67A6A618-5A2B-45EC-9109-8660D92AC1DB.jpeg
4DE19A26-D005-4258-A0EF-986F44D95E45.jpeg|85 years logo (2020)
Category:Philippines
Category:Channel 12
Category:Television channels and stations established in 1957
Category:Locally-owned stations