Whiskey3JMC is right. You shouldn't hear any static on trunked or digital systems if they are programmed correctly. Analog is a different animal. As far as a temp lock out, you can hit the "L/O" button on your radio, and it will temporarily lock out a channel until you power cycle the radio. If you press it twice, it will lock it out, then you have to go to the channel itself and unlock it. For damaging the memory, it's just like anything else. It will eventually wear out, but it will take some time to do that. It's fine to make changes. That's how you learn. Take the time to review your programming to avoid multiple uploads if possible.
