FNJ-DTR series are medium power 200W, 500W UHF/VHF digital TV transmitters in full compliance with the DVB-T/T2 standards. It aims to guarantee continuous broadcasting and benefits from state of the art techniques, technologies and components. The system can be ordered based on customer requirements in different configurations (1+0, 1+1, 2+1, etc.) A transmitter in 2+1 configuration consists of three standalone 200W or 500W transmitters, two main that broadcast individual TS signals and the third one that is reserved. In case of any failure which interrupts functionality of the main transmitters, a central control unit puts the reserve transmitter on the air and substitutes it with the defective one. In 2+1 configuration and normal conditions, RSC is responsible for sending the main transmitter settings (with higher program priority) to the reserve transmitter in certain intervals.