Just purchased a 3500SD but I'm kinda new at this and would greatly appreciate the correct settings to use on my receiver (ie. lnb name? diseqc settign etc...) I am using a D500 dish with a DP twin LNB. I ran a blind scan and was able to find nearly 30 transponders but for some reason Echo 6,8 channels do not work, only Echo 7 works. I did spend a few hours running searches to identify my problem and it came down to 3 possibilities: 1) my settings are incorrect. 2) I don't have a good channel list. or 3) I may possibly be using a Legacy twin LNB as opposed to a DP twin LNB (I mention this because the cover on the LNB is missing).