...and if so what can I do about it?
I have a cobbled-together setup that almost works. I coach swimming, and I have a small video gadget that links to a Tivo and a TV via one of those video transmitters that you can get from ebay. I think it is a 1.2 gHz
50mw version.The kids swim and then watch, and having the Tivo means there's a continuous flow of action. The problem is that the picture quality is bad. I'm only 20 metres away and there is a direct line-of-sight from transmitter to reciever - ocassionally with a body or two in the way; but even without, there is considerable jumping and colour distortion and generally a bad picture. If I stand still at just about any distance I can find a place that gets a good picture, but moving - even turning - makes it change.
The ceiling and the upper half of the inside walls of the pool are panelled with strips of aluminium sheathing - about 6 inches wide and 20 or more feet long. These are separated by about a 1-inch gap along the long edges, and mounted to a framework (which is mounted to concrete) with some sort of clip arrangement. This is a box about 220 feet long and 25 feet high.
What's the best guess for improving the picture? More power? Different frequency? Antenna mounting (I could wear a beanie with it sticking up from the top - that'd be cool)?