1.placing the antenna higher or close to/in a window may result in better reception. you must rescan whenever you move the antenna. 2.if you use a flat HDTV, please go through your TV manual to make sure your TV comes with built-in tuner for free view. 3.make sure you are using a HD recerive; otherwise no HD channels can be picked up. please read receiver manual. 4.you need to retune your free view TVs and digital receiver from time to ensure you are reseiving all available services. retuning takes only a few minites and can be done with your remote control. 5.TV reception capacity depends on the distance among your home, transmitting tower and surrounding environments