Complex sentence: CHOK began testing of it's 103.9 FM transmitter on June 18,2008 and is set to launch on July 23,2008 as Country 103.9 FM and will still simulcast its signal on 1070 AM.
Split into simpler sentences: CHOK began testing of it's 103.9 FM transmitter on June 18,2008. On the morning of July 23,2008, CHOK signed on as Country 103.9 FM and will continue to simulcast its signal on 1070 AM.