This system is composed of “N” transmitters connected to the antenna and 1 transmitter used as back-up unit that is connected to the dummy load.In case one of the “N” transmitters fails it is immediately replaced with the back-up unit and the faulty unit is switched to the dummy load.
The basic operations in a N+1 back-up system is identical to the 1+1 system plus those functions that are typical of this system:

• the power alarm is detected

• it activates both Interlocks on the faulty transmitter and on the backup unit

• it controls the coaxial relay transferring the faulty TX on the dummy load and the back-up TX on the antenna

• it sets the same frequency of the faulty transmitter on the back-up unit

• it switches the audio matrix from the faulty transmitter to the back-up unit

• it switches the RDS matrix

• it switches the interlock matrix in order to release the interlock of the load on the TX connected to the load and the interlock of the combiner on the back-up unit

• it turns on the back-up unit

Other functions are:

• Local/Remote

• Normal/Automatic

• parameter management

• timing management

• interface among the telemetry systems

The image of this layout is purely demonstrative and may change without notice. The configuration is only referred to installed equipment; rack, cover panels and all others accessories are to be defined at order.