We use the LS+ on TCP only. We have the spread spectrum module installed but our cell coverage is pretty good. Hence we do not use the UHF. I believe Matt Johnson told us that the LS+ does not transmit so not having the antenna on would not fry the Spread spectrum module if the antenna was not on the unit. The reason I ask is if I do not have to have the antenna on the UHF that one less thing to hang up in the brush by just putting the cell on the unit. Any thoughts? Mike