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.

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