If your 2nd tv is looking fuzzy most likely you hooked up your diplexors wrong. Make sure the 'in/out' ports on the diplexors always face each other...always, check that first, 90% of the time thats where installers get messed up.
Behind your receiver, output 2 goes to the antenna side of the diplexor, the sat side goes into sat in on the receiver. Outside or wherever the junction box is, sat side of dipplxor goes to the dish, antenna side goes to the second tv wire. Remember in/out ports always facing each other.
Also what channel is the second tv on. Try changing that by going to menu, installation, modulation setup, or 6, 1, 5. You can experiment on different channels to see if your picture clears up; if you have a local statiln broadcasting say on channel 59, 60, or 61 then do not use channel 60 as the 2nd output modulation...interference.