For receiving digital TV via the cable TV network, you need a digital DVB-C tuner in your TV or a separate DVB-C receiver box. In most antenna associations, both YouSee and Stofa have opened up the digital channels in the MPEG4 format. Therefore, it is possible to watch the regular channels in digital quality without a programme card or CA module, as long as you have a DVB-C MPEG4 recorder.
To receive paid channels through a DVB-C receiver, you will still need a TV or a box with a card reader of the type of coding standard which a channel provider uses; e.g. YouSee uses Viaccess and Stofa uses Irdeto programme cards. If the DVB-C receiver does not have such a card reader, a respective CA modul (common interface) must be used in the receiver’s Common Interface Module (CAM) input, and this thus acts as a translator for the payment card and coding standard.