Digital television tuner and decryption system with 4 demodulators and a program stream multiplexer. CAS support is provided via 4 CI slots that accept CAM modules for accessing encrypted programs. Tuning support is also optionally available for QAM (DVB-C), Satellite (DVB-S/S2), and terrestrial (DVB-T) radio frequency RF signal sources. The system is based on a 2 bay chassis system, and RF signal types can easily be interchanged by removing the tuner modules. Each tuner module supports dual tuners and CI slots. Full configuration and management is available on the front panel LCD and keypad, and remote access and monitoring is available on a dedicated NMS network port for control through a web browser. Program streams from all four tuners as well as the IP and ASI inputs can be multiplexed and remapped in any order. Independent output pipes for both ASI and IP are fully configurable. Industry standard support for Conditional Access is provided by 4 Common Interface (CI) slots. These slots support CAM modules such as CableCard or any other system using the PCMCIA interface. In addition to descrambling programs from the RF tuners, the CAM system can also decrypt transport streams from the IP & ASI interfaces. This platform is ideal for program aggregation and multiplexing in cable TV headends and corporate MATV systems.