Distributed intelligence in off-premises addressable CATV systems makes remote diagnostics to the module level fast and easy. Our goal in designing our system was to allow the service technician to troubleshoot a system problem within 15 minutes using a minimum of test equipment.
In order to accomplish this goal, we designed automatic tests which are performed by distributed microprocessor-based controller modules. Each module is able to test its own components, communications with the headend computer, communications and control of the tuners for each subscriber. and the subscriber interface electronics.