Hi Brian, as Chris says, but it's always worth saving a copy of the diagram (it takes very little space), so you can compare diagrams after changes in antenna, location and weather etc.. Always allow a few days to start building a more accurate and true record of what you're receiving, and what improves or decreases range. Usually, the biggest single improvement is getting an antenna outside and in the clear (the more height the better, until downlead losses due to co-ax length cancel out the gain - this is when a pre-amp close to the antenna can be of real benefit - if there's little signal in the first place, a pre-amp has nothing to amplify!).