channel as its former UHF analog channel 55, which was among the high band UHF channels (52-69) that were removed from broadcasting use as a result of the transition with that portion of the band being sold to Qualcomm for use in its nationwide MediaFLO system (later sold to AT&T Mobility for 4G LTE mobile device spectrum). When Qualcomm introduced MediaFLO to Chicago in 2008, WPXE-TV agreed to accept potential interference to 28.87% of the population within its Grade B contour resulting from the service, mostly occurring in fringe areas of Lake County, Illinois which also received Ion service from Chicago sister station WCPX-TV. WPXE's digital signal and subchannels were not affected. On February 2, 2009, the station converted its main digital signal to air high definition content in the 720p format, ahead of Ion's eventual launch of its high definition program schedule. After various tests, however, Ion decided to wait on a full transition and switched back to 480i in April 2009 due to its concerns about a seamless digital transition (as days before February 2, the national transition date was moved by Congress from February 17 to June 12). Full permanent HD service for WPXE launched on April 28, 2010, with the station also receiving HD cable coverage via digital channel 1015 on Time Warner Cable and digital channel 615 on Charter Communications. References External links History of Milwaukee television Ion Television affiliates Bounce TV affiliates Court TV affiliates Grit (TV network) affiliates Defy TV affiliates TrueReal affiliates Scripps News affiliates Television channels and stations established in 1988 PXE-TV 1988 establishments in Wisconsin Kenosha, Wisconsin E. W. Scripps Company television stations