The main thing I wanted to do with it was to inject noise into the line but I also used it to see how much noise was on the line. I also used it to measure the cable length and the pairing quality of the cable.
In addition, I could remote in from my computer, as long as it was on a network, so I didn't have to go back and forth. If I needed it in the lab, I'd place it there and go to my laptop and control it. I could read all the tests and do any tests, all I needed to, which was really good.