The CMS0035 DVB-Satellite Modulator is an integrated core featuring our DVB-S/-DSNG modulator (CMS0010) and DVB-S2/-S2X modulator (CMS0025) cores. The CMS0035 core provides all the functionality required to address the requirements of the ETSI forward-link satellite Standards EN 300 421 (DVB-S), EN 301 210 (DSNG), EN 302 307-1 (DVB-S2) and EN 302 307-2 (DVB S2X), with additional support for DVB-S2X VLSNR operation. The core can operate in a constant coding-and-modulation (CCM) mode for all Standards and in the enhanced variable-coding-and modulation (VCM) and adaptive-coding-and modulation (ACM) modes provided by DVB-S2 and DVB-S2X.
The core provides all the necessary processing steps to modulate a single transport stream (or baseband frame in the case of DVB-S2/-S2X) into a complex I/Q signal for input to a pair of DACs, or an interpolating DAC device such as the AD9857. Optionally, the output can be selected as an IF to supply a single DAC.
The active DVB-S/-DSNG FEC code-rate is controlled via a control register.
The active DVB-S2/-S2X FEC code-rate and frame size are defined by the mod_cod and type parameters associated with each TS packet (or input-frame) and are controlled through the external mode control ports, or optionally from a control register for CCM applications.
The design has been optimised to provide excellent performance in FPGA devices.
