Satellite multiswitch installation

[mike rogers]

I have a TSMS 2150-4a am i required to connect the power supply to the uhf/vhf/ 24v port if i am only using the lnb inputs

 

[Mr Tony]

What system are you installing?

Since I had to google it what I show is this
2150-4A is a multiswitch to hook say 4 SD receivers to a single satellite dish (like a 18" Directv)....2 inputs (for the LNB) and a OTA. NO power needed
2150-5-4 is a 2 LNB setup (like for an old Phase II setup) and it does REQUIRE the power insterter