Just getting used to my Coolsat 6000 - there is an arc of 5 small circles in the middle of the info bar displayed when viewing a channel - I'm sure these are informative, I guess the extreme left is a $ sign indicating an encrypted/pay channel, and if my guess is right the circle on the extreme right indicates audio in ac-3. I have not yet seen any use of the 3 circles in the middle. Can anyone enlighten me on what they do? Manual is not very helpful here.