TV operators based on invest, advantage, as well as the interests of copyright and other factors to consider, in front of a digital TV signal scrambling, and the user must use a receiving terminal operators authorized to confirm the STB corresponding descrambling, ratings and charge certain fees, which is the form of a number of TV programs conditional Access.

Through the Conditional Access system, the program providers, net work providers and users to establish a paid service system, based on this system, they have been compensated for the investment, thereby promoting the development of the whole industry.

The Conditional Access system based on the CA technology, which is digital TV service to achieve personalized service and the key of paid service, the important factor for promote the market-oriented digital TV. 

AIWEI Conditional access system (V3.0.0) head end system including ECMG,EMMG, Date cache equipment and database, while the conditional access system provides the main interface procedures running state the facts real-time monitoring, and can be recorded important state information for fault diagnosis.