The ACO1/FM120 automatic switch over unit allows to automatically
switch between a MAIN TV transmitter and a RESERVE TV transmitter,
in case of MAIN unit failure. It is also possible, using the front
panel controls, to by-pass temporarily the automatic circuit and to
manually override the unit to select between MAIN and RESERVE equipments.
The ACO1/FM120 accepts a 12000 W maximum working power.