WMTJ (channel 40), branded on-air as Sistema TV, is a PBS member television station serving San Juan, Puerto Rico that is licensed to Fajardo.
[4] On October 16, 2017, the Ana G. Mendez University System announced that the station would be shut down indefinitely as part of a larger suspension of non-academic activities at the school.
On January 24, WMTJ resumed broadcasting with a reduced power of 17.7 kilowatts from El Yunque.
On January 1, 2019, WMTJ returned to the air on its digital channel 15 and transmitter power increased to 174 kilowatts.
[6] The majority of the station's daily programming is from PBS, but it broadcasts some locally produced content as well.