4S-2T 4 DVB-S/S2 BISS to 2 COFDM Modulator is a cost-effective DVB-T Trans modulator developed according to DVB-T standard. It supports 4 Tuner input selecting from 4 Tuner ports. After demodulating, re-multiplexing, then it gives 1 or 2 DVB-T RF out. BISS function is also embedded to descramble multiplexed programs. With the features of low cost and high performance, it provides various solutions for operators to re-distribute contents.