I have a cousin who has a Kenwood TK-250(G) that he uses for the Fire Department he's on BUT it has buttons on it and he's not sure what they are for, They don't do anything when he pushes them, They're are several buttons, TX, Light, And Squelch on the left side. Then on the top we have Scan, T/A for Talk Around, Then a knob for volume and a knob for channels.. However, There's also another one that has D/A on it. When we push it is shows A beside the channel name or nothing.... Does this mean Digital or Analog? I wouldn't think since it does nothing when we hit it. I can't find anything about it ANYWHERE online.. Does anyone have a similar model or know what the D/A button on the Kenwood TK-250(G) might be for? Any Help Would Be Appreciated.. Thanks!