2011 Nissan Xterra Owner's Manual - Page 161

Static and flutter: During signal interference from buildings, large hills or due to antenna position (usually in conjunction with increased distance from the station transmitter), static or flutter can be heard. This can be reduced by adjusting the treble control to reduce treble response. Multipath reception: Because of the reflective characteristics of FM signals, direct and reflected signals reach the receiver at the same time. The signals may cancel each other, resulting in momentary flutter or loss of sound. SATELLITE RADIO RECEPTION (if so equipped) When the satellite radio is used for the first time or the battery has been replaced, the satellite radio may not work properly. This is not a malfunction. Wait more than 10 minutes with satellite radio ON and the vehicle outside of any metal or large building for satellite radio to receive all of the necessary data. No satellite radio reception is available and "NO SAT" is displayed when the SAT band option is selected unless optional satellite receiver and antenna are installed and an XM satellite radio service subscription is active. Satellite radio can only be installed in vehicles that were factory pre-wired for satellite radio. Satellite radio is not available in Alaska, Hawaii and Guam. Satellite radio performance may be affected if cargo carried on the roof blocks the satellite radio signal. If possible, do not put cargo over the satellite antenna. A build up of ice on the satellite radio antenna can affect satellite radio performance. Remove the ice to restore satellite radio reception. LHA0099 AM RADIO RECEPTION AM signals, because of their low frequency, can bend around objects and skip along the ground. In addition, the signals can be bounced off the ionosphere and bent back to earth. Because of these characteristics, AM signals are also subject to interference as they travel from transmitter to receiver. Fading: Occurs while the vehicle is passing through freeway underpasses or in areas with many tall buildings. It can also occur for several seconds during ionospheric turbulence even in areas where no obstacles exist. Static: Caused by thunderstorms, electrical power lines, electric signs and even traffic lights. AUDIO OPERATION PRECAUTIONS 4-18 Heater, air conditioner, audio and phone systems