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Why do Video Switchers Need Power?

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06-23-2016, 02:15 AM

Outland

VideoKarma Member

Join Date: May 2012

Location: Maryland

Posts: 305

Why do Video Switchers Need Power?

I was looking at a few composite video switchers, and I noticed that some of them (such as this one) need separate power.

What is the power for? I would assume all it's doing is mechanically making contact with the different inputs and outputs. Others don't need power at all.

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