Different Cable TV providers use different scrambling systems to control access to pay channels.

They also use different Cable TV converters to descramble those channels when a subscriber pays to watch them on monthly or per show bases.

Not every Cable TV converter is capable of descrambling any channels when it receives the authorization signal through the cable, it has to be compatible with the system.

A test chip will give your box a full authorization signal which will allow you to test what channels your box is capable of descrambling, and if it’s compatible with the system your provider use’s.