btw - you don't need any expensive RF signal generators or meters to prove the loss through these boxes. Simply run a channel scan with your antenna or cable service connected through the box, then direct connect to one of your TVs and run another scan (unless you have a new antenna which does not require the 12vdc, or you have a wall plate that will apply the 12vdc power, you may not be able to test with the antenna directly connected to the TV). Now compare the number and signal quality of the channels found.
