Model CR-313 is a S-Band configurable digital command receiver. This receiver features advanced digital signal processing techniques implemented in radiation hardened Field-Programmable Gate Arrays (FPGA). Due to the digitally based design approach, the receiver can be configured at the time of manufacture for a variety of command uplink waveforms, including NASA Spaceflight Tracking and Data Network (STDN), BPSK, and Residual Carrier Direct Modulation, as well as USAF SGLS (Space-Ground Link System).