Terminating Loads
The integrity of the system relies on the cable and associated equipment reflecting a correct load on the line.
The extremities of the system require a balanced load to reflect the correct impedance back to the last active device. Should a break occur in the cable then a termination load should be placed on the end of the coax to balance the system. The system will not fail completely should the cable not be terminated.
The termination loads are also a DC block and the presence of power at the end of the coax will not effect the cable.