This works.. http://www.amazon.com/gp/product/B002JSDHCY/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
On the one STB I have in my basement I put like a 40 or 50FT extension cable on it and ran it to my kitchen TV, so I could share this STB between basement and kitchen TV and works no problem.