Discussion Why do we need multi lnb setup?

[Amudhan]

I have some doubts about multi lnb setup.. Correct me if I'm wrong..
when we do mirror test all corners of a dish reflected to the center of a lnb right?
if so, setting a single lnb could capture all satellite if they're in nearby position right? cuz all satellite beam fell on dish reflected to the lnb.. then why do we need additional lnb to get a satellite beam which fell on dish anyway? if a satellite beam fell on dish it'll relected to lnb know?
don't tell me pointing a lnb towards the satellite is matters.. cuz lnb is just receiving signals reflected from dish only.
I hope someone will explain about this multi lnb set up here.

 

[karthik7]

the dish reflects the signal of a satellite to which it is focused to the lnb but if there is another satellite nearby its signal will not be reflected to lnb it will be reflected to a point beside the lnb where another lnb should be placed to receive it