Is big problem for You to change the distans between switch and LNB?
Optimal is 30-50 cm but 8 m. is too long. You may try change voltage for LNB (in menu on DMB) -add 0,5 V, if it change nothing You need to make "good" distans for normal work.
Sorry, I don't know other answers.
Rgds
PS: I've diseq1.0 near the SAT antenne with special box, any bad weather is no problem
