(NOOB) How do I apply voltage to ku band lnbs?

But what if I get a diseqc switch that goes to two or three lnbs. Would it still work?
Yes. Diseqc switches will pass the DC power to the LNB(s).
Make sure you shut off the receiver before connecting or dis-connecting cables on the diseqc switch or LNBs connected to it. The switches are very sensitive and don't like voltage spikes.
It's good to have a spare just in case... :)
 

Sonicview SV-HD8000

Intelsat 18 180.0E Ku