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What are the main subsystems of DVB front-end system?
Source acquisition system, signal processing system, conditional access system, user management system, modulation output system, network management system, etc. Some also include broadcast signal monitoring systems.
The source acquisition system mainly completes the collection and summary of broadcast signals. The aggregate signal is processed by the signal processing system, and the program signal is encrypted by the conditional access system. The encrypted signal is sent to the cable TV network by radio frequency modulation. The network management system monitors and manages the state of the front-end equipment and adjusts the equipment parameters. The signal monitoring system cooperates with the maintenance manager to find the signal problem in time and solve the front-end operation fault. User management system cooperates with front-end authorized users to manage and charge!
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