I just recently got an XTS1500 VHF and it was already programmed with channels and had features in it as zone selection as well as scan and just everything that you would need for a conventional radio. However when i turn the radio on it goes through the self check just fine but then there is a medium level tone that is continuous as if it is on a blank channel. I can read and write to the radio just fine, but it will not allow me to transmit on anything that i have programmed because of this tone. The transmit light flickers for a breif second then goes out. This radio has also presented this problem before i even hooked it up to the computer. If anyone can please help I would much appreciate it.