1999 Mercury Sable Owner Guide 1st Printing - Page 40

Controls and features modulation." Signal modulation is a process radio stations use to increase their strength/volume relative to other stations. • Terrain. Hills, mountains and tall buildings between your vehicle's antenna and the radio station signal can cause FM reception problems. Static can be caused on AM stations by power lines, electric fences, traffic lights and thunderstorms. Moving away from an interfering structure (out of its "shadow") returns your reception to normal. • Station overload. Weak signals are sometimes captured by stronger signals when you pass a broadcast tower. A stronger signal may temporarily overtake a weaker signal and play while the weak station frequency is displayed. The audio system automatically switches to single channel reception if it will improve the reception of a station normally received in stereo. Audio system warranties and service Refer to the "Warranty Guide" for audio system warranty information. If service is necessary, see your dealer or a qualified technician. POSITIONS OF THE IGNITION 1. ACCESSORY, allows 3 2 the electrical accessories such as the radio to operate while the engine is not 1 running. 2. LOCK, locks the steering wheel, automatic transmission gearshift lever and allows key removal. 3. OFF, shuts off the engine and all accessories without locking the steering wheel. 40 4 5