We have 2 aerials. One is a mast that you need to fit to side of van when you stop and the other one is a small round thing with a point on it on the roof. My Q is I had assumed the mast may be used in difficult to pick up a signal areas and the wee round one on top for normal use. We can only get a signal by using the mast. The aerial on top doesn't even pick up 1 single channel. Does this wee round one pull out, surely you don't need to take a large set of ladders to extend it or do you think the thing is just faulty and that's why the mast aerial is there. Each day I learn something new thanks to all you wonderful people.!