I agree that the cable company will do the best hookups, terminating, and testing. That bieng said, sometimes though when doing additions to existing houses it falls back to me to add cable outlets to the existing system. I use a really good terminating tool called the cable pro I got from ADI. Nowadays I no longer drag my little tv set around to test jacks because I am confident enough my crimper is making a good connection. But befor this purchase I used to use screw on connectors or worse yet the radio shack crimper tool and frequently those connectors were less than great. That is when my little tv set was really useful. If a particular jack had my tv set blurry I would re do the tv connectors at both ends to fix the problem. The customers were happy and I got paid. So if you want perfection bring in the cable company and their expensive testing equipment. If you want a tv test that passes Joe Customer's complaint test use my dvd - tv setup test before you leave the job and you won't need to come back.
