Subchannels PBS NC's current over-the-air digital configuration, which is
multiplexed among three subchannels, was introduced on September 25, 2008. On that date, UNC-TV revised its subchannel lineup on its stations, reducing the number of channels to three: UNC-TV (the main channel of each station, which now carries high definition programming), and the
standard definition-only services UNC-KD and UNC-EX ("The Explorer Channel"). UNC-TV HD and UNC-EX are also available to
DirecTV customers with MPEG4-compatible receivers. Prior to February 1, 2016,
Time Warner Cable customers also received UNC-MX (described as "an eclectic mix of programming for adults") in standard definition; the North Carolina Channel has since replaced UNC-MX on Time Warner Cable systems. Prior to November 1, 2009, the third subchannel was named UNC-NC. This configuration is used for WUND, WUNF, WUNG, WUNJ, WUNK, and WUNU: This configuration is used for WUNC and WUNL: An alternate configuration is used for WUNE, WUNM, WUNP, and WUNW. The original purpose for this was to obtain
must-carry status for UNC-KD since those are secondary stations in their respective
markets. On June 15, 2010, UNC-KD switched subchannels with UNC-EX on the four stations previously mentioned, which transferred UNC-KD's must-carry status to UNC-EX. Subscribers of
Charter Spectrum, the major
cable provider in the state, have direct-fiber optic versions of each of PBS North Carolina's networks rather than an antenna feed of their local station, as Spectrum forerunner company Time Warner Cable built out a direct connection to PBS NC's studios at the RTP, a connection inherited by Spectrum parent
Charter Communications when it merged with Time Warner Cable in 2016. Cable providers with a direct fiber optic link to UNC-TV (including Spectrum) formerly had exclusivity in carrying UNC-MX (formerly UNC-ED) on their
digital tiers. UNC-MX featured a mix of how-to and public affairs programs, along with encore presentations of programs originally broadcast on main UNC-TV service. On February 1, 2016, UNC-MX was renamed UNC-NC "The North Carolina Channel" and was added over-the-air on DT4, allowing full access to the service by over-the-air and non-Spectrum viewers. On July 2, 2016, UNC-KD was rebranded as ROOTLE. Prior to September 25, 2008, UNC-TV formerly operated four digital channels: in addition to the main signal on the primary channel, the second digital subchannel of each station carried
UNC-HD (which carried PBS and regional programming in high-definition), the third subchannel carried
UNC-KD (which carried children's programs), the fourth subchannel carried
UNC-ED (an educational television service) and the fifth subchannel carried
UNC-NC (centering on North Carolina
public affairs and original local productions). Due to bandwidth limitations at the time, the over-the-air feed of UNC-HD was only available between 8-11 p.m., during which UNC-ED and UNC-NC ceased transmission in the interim. Cable systems with a direct fiber link to UNC-TV facilities aired all five channels on a 24-hour schedule. On April 16, 2018,
WRAY-TV and
WLXI were merged onto WUNC's spectrum, after parent company
Tri-State Christian Television (TCT) sold the stations' individual bandwidth in the 2016 FCC
incentive auction. WUNC is the only station in the 12-station network that has a channel sharing agreement.
Analog-to-digital conversion UNC-TV's stations ended regular programming on their analog signals on June 12, 2009, the official date on which full-power television stations in the United States
transitioned from analog to digital broadcasts under federal mandate. The station's digital channel allocations pre- and post-transition are as follows: All channels retained their original numbering for display to viewers via
PSIP. UNC-TV opted not to join other broadcasters in the Wilmington market in an early switch to digital-only broadcasts on September 8, 2008, nine months ahead of the national transition deadline. Following that date, WUNJ-TV became only full-power station in Wilmington that continued to broadcast an analog signal until the national digital transition on June 12, 2009. As part of the
SAFER Act, WUND and WUNF kept its analog signal on the air until July 12 (for WUND) and June 26 (for WUNF) to inform viewers of the digital television transition through a loop of
public service announcements from the
National Association of Broadcasters.
ATSC 3.0 On March 22, 2021, WUNC-TV began broadcasting in
ATSC 3.0, with a
1080p stream (virtual channel 4.11) on
Capitol Broadcasting Company's host station WARZ-CD (now
WNGT-CD). On June 29, 2021, WUNK-TV was converted to ATSC 3.0 with all sub-channels included. While a simulcast of WUNK-TV is shared on WUNM-TV, areas outside WUNM-TV are covered by other nearby network stations, thus the conversion did not result in any loss of over-the-air PBS service. ==Translators==