What condition can indicate a communication failure between the second receiver (RX2) and the Antenna Control Unit (ACU) in an Inmarsat Fleet 77 terminal?
The terminal will indicate RX2 is locked onto a signal on the Inmarsat NCSC channel.
The terminal will indicate receipt of a valid frame on the Inmarsat NCSC channel.
The message "RX2 Comm error" or "ACU Comm error" will be displayed.
The DCE/DTE communication protocol is improperly configured.