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 freeview.3. You need to retune your freeview TVs and digital receiver from time to ensure you are reserving all available services. retuning takes only a few minutes and can be done with your remote control.4.TV reception capacity depends on the distance among your home, transmitting tower and surrounding environments.