WLRN-TV is a Public Broadcasting Service

Public Broadcasting Service

The Public Broadcasting Service is an American non-profit public broadcasting television network with 354 member TV stations in the United States which hold collective ownership. Its headquarters is in Arlington, Virginia....

 (PBS) member public television station broadcasting on channel 17 (DTV

Digital television

Digital television is the transmission of audio and video by digital signals, in contrast to the analog signals used by analog TV...

 20) in Miami, Florida

Miami, Florida

Miami is a city located on the Atlantic coast in southeastern Florida and the county seat of Miami-Dade County, the most populous county in Florida and the eighth-most populous county in the United States with a population of 2,500,625...

.

WLRN-TV signed on the air as WSEC-TV in 1962 as a second educational non-profit television station, licensed to the Dade County School Board, and affiliated with National Educational Television

National Educational Television

National Educational Television was an American non-commercial educational public television network in the United States from May 16, 1954 to October 4, 1970...

 (NET).

During the early years of public television in South Florida, the Dade County School Board and the Community Television Foundation of South Florida shared time on Channel 2. The School Board would broadcast five hours of instructional television during the day as WTHS-TV, while the CTF would broadcast two hours in the evening as WPBT

WPBT

WPBT is a PBS member public television station that serves the entire South Florida region, and even including portions of the Treasure Coast, the only television station to serve the entire metropolis...

. This arrangement continued even as the formation of PBS brought an increase in WPBT's operating hours. Eventually, the School Board and the CTF decided that this arrangement could not continue. The School Board returned the license for WTHS to the Federal Communications Commission

Federal Communications Commission

The Federal Communications Commission is an independent agency of the United States government, created, Congressional statute , and with the majority of its commissioners appointed by the current President. The FCC works towards six goals in the areas of broadband, competition, the spectrum, the...

 (FCC) in 1978, while WPBT continued broadcasting (now fulltime) on Channel 2. The calls for WSEC were changed to WLRN-TV as well, to match the public radio station.

WLRN-TV presents a variety of educational and local programming to the South Florida community. The station offices and studios are located in Miami.

The school board also owns WLRN-FM

WLRN-FM

WLRN-FM is a class C1 FM station on 91.3 and is the main public radio station for South Florida and the Keys based in Miami. The station is owned-and-operated by the Miami-Dade County Public Schools and is the area's NPR member station....

 91.3, a member of NPR.

Digital television

WLRN's digital channel is multiplexed:

Channel	Video Display resolution The display resolution of a digital television or display device is the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by all different factors in cathode ray tube , flat panel or projection...	Aspect Aspect ratio The aspect ratio of a shape is the ratio of its longer dimension to its shorter dimension. It may be applied to two characteristic dimensions of a three-dimensional shape, such as the ratio of the longest and shortest axis, or for symmetrical objects that are described by just two measurements,...	Programming
17.1	1080i 1080i 1080i is the shorthand name for a high-definition television mode. The i means interlaced video; 1080i differs from 1080p, in which the p stands for progressive scan. The term 1080i assumes a widescreen aspect ratio of 16:9, implying a frame size of 1920×1080 pixels...	16:9 16:9 16:9 is an aspect ratio with a width of 16 units and height of 9. Since 2009, it has become the most common aspect ratio for sold televisions and computer monitors and is also the international standard format of HDTV, Full HD, non-HD digital television and analog widescreen television ...	Main WLRN programing / PBS HD
17.2	480i 480i 480i is the shorthand name for a video mode, namely the US NTSC television system or digital television systems with the same characteristics. The i, which is sometimes uppercase, stands for interlaced, the 480 for a vertical frame resolution of 480 lines containing picture information; while NTSC...	4:3	WLRN Learn

WLRN Learn features educational, lifestyle and best-of programming, plus selected programs from MHz Worldview

MHz Worldview

MHz WorldView is an independent, non-commercial Public television network that broadcasts newscasts and other programs from around the world. It is owned and operated by Commonwealth Public Broadcasting Corporation who also run MHz Networks....

.

In addition, WLRN operates twenty closed-circuit educational channels for use by Miami-Dade's public schools.