The base of Decoder D3618S is a exchanger on the adjacent frequency receiver in addition of discramble module and read module, using for receiving the scramble or discramble signals of CATV web. The latter one can directly get through, while the former one shuld be authorized and discramble, in this way, the users can receive. It will not be decoded without authority. User should take IC card and go to charge at the target cash desk, and get the authority, then you can receive scrambled TV programs. Otherwise, you only can receive the discrambled programs. Functions of decoder (D3618) Completing infra-ray remote control can directly control the input of channel, switch, and volume. To realize frequency trimming, channel return and quiet sound function. 99 channels are received and storage in 860MHz. Offer base band sound, output of video frequency and radio frequency (optional). IC card is for recording legal users authorized card number, key and charge