A:Answer Using the off air antenna, all reception is in HD. The cable cos scramble the off air signals, so they can charge you extra for HD service , by un scrambling the signal back to the original broadcast one. Run another scan with your Mohu in or near a window to pick up all of your local channels from your area. Follow the antenna directions and move the antenna to get the most channels available within your broadcast range, usually about 30 miles, but the Mohu has a 50+ miles range if the station signal is over two bars strong.