2007 Saturn Ion Owner's Manual - Page 214

Radio Reception Frequency interference and static can occur during normal radio reception if items such as cellphone chargers, vehicle convenience accessories, and external electronic devices are plugged into the accessory power outlet. If there is interference or static, unplug the item from the accessory power outlet. XM™ Satellite Radio Service XM™ Satellite Radio Service gives digital radio reception from coast-to-coast in the 48 contiguous United States, and in Canada. Just as with FM, tall buildings or hills can interfere with satellite radio signals, causing the sound to fade in and out. In addition, traveling or standing under heavy foliage, bridges, garages, or tunnels may cause the loss of XM™ signal for a period of time. The radio might display NO XM SIGNAL to indicate interference. AM The range for most AM stations is greater than for FM, especially at night. The longer range can cause station frequencies to interfere with each other. For better radio reception, most AM radio stations boost the power levels during the day, and then reduces these levels during the night. Static can also occur when things like storms and power lines interfere with radio reception. When this happens, try reducing the treble on the radio. Cellular Phone Usage Cellular phone usage could cause interference with your vehicle's radio. This interference could occur when making or receiving phone calls, charging the phone's battery, or simply having the phone on. This interference is an increased level of static while listening to the radio. If static is received while listening to the radio, unplug the cellular phone and turn it off. FM Stereo FM stereo gives the best sound, but FM signals reach only about 10 to 40 miles (16 to 65 km). Tall buildings or hills can interfere with FM signals, causing the sound to fade in and out. 214