This system is composed of 2 exciters A and B, in which one is ON and the other is OFF. In case the unit that is on fails, it will be replaced by the second unit.
This system is used to drive combined MOSFET transmitters with a high intrinsic redundance. The major benefit of this system is to guarantee high reliability at a minimum cost, being the coaxial relay an economic device thanks the low power handled.

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.