How do satellite television services show you local channels? Many local channels will try to expand their presence by having a satellite uplink into the very same satellites that give satellite tv services. Other times, the satellite tv provider will be the one performing the uplink, using relayed broadcast television signals. These will result in local channels being broadcast on satellite television services being a few seconds out of synchronization with regular broadcasts through the airwaves, as the radio signals have to travel a greater distance and will have to undergo processing.