It's an access card.. for the Direct TV system that encodes the package purchased. "H" cards are the older style cards bought almost exclusively by those stealing access at this point. For quite awhile now, all new DDS units have shipped with "HU" cards, which are much more difficult, if not impossible to hack. "H" cards at this point run from 200-300 dollars, depending on the condition.
Essentially, he wants to program his H card to the pattern of the "system test" card, which can access ALL channels and ALL pay-per view items.