It's not in the manual but I've seen it suggested here that 1-x thru 4-x is for cw and 5-x and up for ssb. I used to use 5-1 or 2 but now liking 6-1 to 6-3 so if your using 1 or 2 on ssb, try 5 or 6. 73 Mike R Sent from my spy ring