Space-optimized SDR mission data transmitter based on the powerful Xilinx Zynq® SoC platform (Kintex 7 FPGA + Dual ARM9 Cores). RF Transmitter supporting X-band (8.025 GHz—8.4 GHz). The S2DR HRTX is a software defined radio hardware and RF solution providing high rate mission data transfer in S and X bands. The S2DR HRTX transmitter provides 28 modulation and coding schemes enabling flexible link design and effective link robustness / link rate tradeoffs.