High-definition (HD) cable descramblers are special boxes used to decipher the signal from a cable box and turn it into visual information, notes EnlightenMe.com. These units are found inside HD digital cable boxes, and can only be used when paid for through a cable company.
The cost of cable has caused many people to find less expensive ways of accessing television programming. One such way is through the use of an HD descrambler. Although the descrambler will create a usable signal, using a unit without notifying the cable company is considered theft and can result in fines. Descramblers should only be used in conjunction with a service plan purchased by the user.