I got two new STB's and have tried both units on C-Band AMC-3. So far i am having better luck with the Openbox S-9 HD in pulling in the DBV-S2 8psk channels. I also got an Azbox Ultra and could not pull in the same channels. The threshold must be higher on the AZbox because the Openbox seemed to scan the channels and they are popping right up. The 4080 Freqs are the ones that i am receiving, still having issues with the ones at 3800. My antenna still probably needs some peaking.