Safely Pass DC Voltage and Current in One Direction for Supplying Same to In-Line Amps and LNB's as Necessary. Proper Feed Directionality and System Grounding assures Protection for the Very Expensive Equipment that goes to make up your System. Make Certain that all Connections are Proper BEFORE Turning System Equipment on!
When Splitting the High Frequencies of Satellite TV Services to feed multiple Receivers, the Loss associated with the splitter may need to be compensated for with the use of an In-Line Satellite Drop Amplifier specific to this purpose and Frequency Range. Consider the need and review the "Satellite TV Amplifier" category for selection.
Also the issue of supplying Voltage back to the LNB(F) may be addressed more resolutely with the installation of a Power Supply and Power Inserter specific to the purpose. Consider the need and review the "DC Power Inserter" category for selection.
Commensurate with Coaxial Cable TV Antenna and Satellite TV Power Inserter Installation, you want to Ground your Cable TV or HDTV Antenna Coaxial Cable System Outside before bringing the TV Cable Inside. This way, Lightning Strikes and Power Surges have an opportunity to arrest before reaching your Satellite Receiver and TV Set(s). The Integral Grounding Block designed onto most Outdoor Use Compatible Satellite Signal Splitter we sell will effectively convey this unwanted Electrical Energy to a Ground Rod via a Copper Ground Wire that you Install (not included). Consult your Local Building Code and NEC for guidance to Properly Grounding your HD TV Antenna, Satellite TV, Cable TV, WI-FI, Wireless Internet, Business Band, CB or Amateur Radio Antenna Installation.