 WRGB ran this transmitter for approximately 6 weeks on an experimental basis, only to find that the vertically polarized 87.7 MHz signal interfered with the digital video, while broadcast of analog signals on 87.9 MHz met with FCC objections.WITI in Milwaukee took a more direct though still experimental approach to restore their TV audio, having it restored in August 2009 to an HD Radio subchannel of WMIL-FM via a content agreement with WMIL owner Clear Channel Communications.A purchase of HD Radio equipment or having a car stereo equipped with an HD Radio receiver is required to listen to this broadcast.