SED provides the baseband encoding and uplink capability for both SXM Satellite Radio uplinks. Each Uplink Delivery System (UDS) encodes and relays audio and data radio programming from SXM’s programming centers to two geo-synchronous satellites for rebroadcast to digital radio receivers anywhere in the continental United States and Canada.
After the audio input streams are encoded, broadcast program channels and uplinked TDM streams are created with custom application software developed by SED. The system includes multiple hardware and software redundancy to ensure 24/7 operations. The associated antenna and RF equipment for the uplink was also provided by SED.