I'm new to the whole cb world. When I inherited my k5 it came with a cb that either my grandfather or late uncle bought. Anyways, it has all these knobs on it. It has delta tune, RF gain, and squelch. I'm somewhat familiar w/ squelch from programming scanners, but what is this other stuff? Whats the best way to tune it? It has an SWR meter on the CB (i think thats what it is). So educate me. All I really need it for is communication on the trails.