Connect 2 dreamboxes 500S

[tiresz]

Hi,

Is this setup possible?

1 satellite dish with 4 LNB's ( single)  to 1 coax-cable > goes in the Dreambox500S (A) antenna input.
Then 1 coax from antenna output dreambox500s (A) to antenna input dreambox500s (B)

Questions?
1) does this work with 1 coax-cable from the satellite dish?
2) can i watch to 2 different channels? or do i need a LNB twin?

thanks for you're help