A considerable number of Earth Observation missions are based on small satellites class and embark payloads producing substantial data rates, thus requiring a reliable, efficient and economical payload data transmitter specialised for medium to high data rates (i.e., from hundred Mb/s to several Gb/s). Such missions would benefit from employing state-of-the-art coding and modulation standard, allowing to exploit the protection offered by modern coding techniques while at the same time maximizing the supported data rates by using spectral efficient modulation formats. The DVB-S2/S2X Transmitter IP Core is fully compliant with the CCSDS 131.3-B standard and compliant to the ETSI EN 302 307-1/302 307-2 standards. The DVB-S2 transmitter combines Low Density Parity Check (LDPC) codes with modulations ranging from QPSK to 8PSK and 16-APSK, 32-APSK. The DVB-S2X extension increases the flexibility providing new coding rates and new 64–APSK, 128-APSK, and 256-APSK modulation formats. This broad set of coding rates and modulation formats enable fine-grained system configuration, allowing the transmitter to be tailored to a wide range of mission-specific requirements.