The SDST is a spaceborne terminal for X-Band and Ka-Band telecommunications developed by General Dynamics and NASA's Jet Propulsion Laboratory.

Making extensive use of MMICs, multi-chip modules, and a new signal-processing ASIC, the SDST’s flexible design provides the capability to meet the telecommunication needs of nearly every deep-space mission. The SDST has two configurations. The X/X configuration consists of an X-band receiver, and an X-band 880F1 exciter. The X/X/Ka configuration consists of an X-band receiver, an X-band 880F1 exciter, and an X-band 840F1 exciter.