Can you use a satellite splitter to distribute signals from an antenna?

You can use a hamster to drive in a nail instead of a hammer, but neither you nor the hamster are going to be terribly happy about it. The point here is that things that seem very similar are not always as similar as you would think.

Take as a case in point the humble DIRECTV splitter shown above. If you’ve recently cut the cord you probably have a few of these here and you’re thinking maybe you want to use them to distribute signal from your antenna to your TVs. It would be a good idea except, well, it isn’t.

DIRECTV splitter are actually some of the worst possible splitters to use for antennas. They’re very high-quality splitters to be sure, but they are designed for DIRECTV use and that’s what makes them poor splitters for antenna use. DIRECTV signals travel in the bands between 950 and 2150MHz, where antenna TV is more in the 174-700MHz range. First of all, splitters are designed to be most effective at certain frequencies, so there’s that working against you right now. The big problem, though, is that DIRECTV does something else with the frequencies between 475 and 625MHz: they’re used for networking.

DIRECTV’s coax networking carries video to client boxes as well as other internet information to any HD receiver or DVR. As a result, all these boxes need to talk to each other, and DIRECTV receivers are designed to actually allow information from those frequencies to flow from port to port on a splitter. It’s actually considered a good thing in this particular case, but when frequencies pass from port to port on a splitter used for antennas, the result can be crosstalk and reception problems. That’s why a DIRECTV splitter is more or less the worst splitter possible for antenna use. Literally any other splitter is going to be better.

There’s good news at the end of this story though, and that’s if you are considering using your unused DIRECTV system to help you distribute antenna TV, all the cables are still going to be good. You just need to swap out the splitters and you’ll be all set. Even better news of course, is that we have a wide variety of really high-quality antenna splitters available at for very reasonable prices. Those DIRECTV splitters can go in a box or be responsibly recycled or given away to hobbyist friends of yours so they can upgrade their DIRECTV systems. After all, not everyone’s a cord-cutter like you!