[y=mx+c]

The biggest issue with self installs is that they assume the customer is able to grasp the basic understanding of connecting a new piece of equipment to there hardware. Tossing aside the fact that most STB’s issued have the wrong area default frequency etc. and the levels may be all to pot if at all connected at the cab. Someone has forget that the Americans were spoon fed cable but in the UK were still naive. At least money is being saved somewhere.