The former temporary channel 31 transmitter has remained in a functional, though dormant state since the transition; Tribune Broadcasting donated the transmitter to the National Association of Broadcasters, which it used to conduct a six-month test of the "Futurecast" ATSC 3.0 standard advanced by LG Electronics and GatesAir beginning in May 2015, as WI9X3Y. The transmitter remained active for the duration of the 2016 World Series (which the Indians played in), broadcasting in 4K UHD to the Cleveland area using the ATSC 3.0 standard with Dolby AC-4 Audio (though the audio standard has not been completely finalized yet, with AC-4 and competitor MPEG-H as the remaining options for audio). This station also broadcasts brief, intermittent ATSC 1.0-compatible signals during parts of the day for reception comparisons under the callsign of WI9XJY.