WNJX-TV (channel 4) is a Spanish-language independent television station licensed to Mayagüez, Puerto Rico. It is a full-time satellite of San Juan-licensed WAPA-TV (channel 4), owned by Hemisphere Media Group. WNJX-TV's transmitter is located at Monte del Estado in Maricao, while its parent station maintains studios on Avenida Luis Vigoreaux in Guaynabo. WNJX-TV's fourth digital subchannel operates as a full-time satellite of San Juan-licensed Telemundo owned-and-operated station WKAQ-TV (channel 2) under a time brokerage agreement with the Telemundo Station Group subsidiary of NBCUniversal (itself a subsidiary of Comcast). Branded on-air as Telemundo West, this subchannel is mapped to virtual channel 2.12 rather than 4.4. WNJX-DT4's parent station maintains studios on Roosevelt Avenue in San Juan. Digital television Digital channels The station's digital signal is multiplexed: Analog-to-digital conversion WNJX-TV shut down its analog signal over UHF channel 22, on June 12, 2009, the official date in which full-power television stations in the United States transitioned from analog to digital broadcasts under federal mandate. The station's digital signal remained on its pre-transition UHF channel 23. Through the use of PSIP, digital television receivers display the station's virtual channel at VHF channel 4. References External links WAPA-TV – Official website Telemundo Puerto Rico – Official website for Telemundo Puerto Rico Independent television stations in the United States Telemundo network affiliates Mayagüez, Puerto Rico Television channels and stations established in 1986 1986 establishments in the United States NJX-TV