Radio signals in the AM and FM bands are emitted from the transmitter towers located around your city, are received by the radio antennas in your car and transmitted to the radio and then to the loudspeakers.
When receiving a strong radio signal, your high-tech audio system delivers high quality sound. However, in some cases, the received signal does not have sufficient strength and purity. This is due to factors such as the distance from the radio station, the proximity of other radio stations, or the presence of buildings, bridges, or other large structures that interfere with the propagation of radio waves.
The reception range in the AM band is longer than in the FM band, because AM transmission is carried out at low frequencies. Long low-frequency radio waves do not propagate in the atmosphere in a straight line, but follow the curvature of the earth's surface. In addition, they go around obstacles, due to which the signal reception area increases.
Transmission in the FM band is carried out at high frequencies, so radio waves do not go around the earth's surface. For this reason, FM reception usually begins to weaken at a short distance from the transmitter. In addition, buildings, mountains, and other obstacles greatly affect the quality of FM signal reception. This results in poor reception, which you may perceive as a malfunction of the audio system. The following are possible cases of poor reception that are not the result of a malfunction of the audio system.
Signal Fading - As the vehicle moves away from the radio, the signal fades and the volume decreases. In this case, we recommend switching to another, more powerful station
Rapid signal level fluctuations («flutter») /Electrostatic Interference - If the FM signal is weak or there are obstacles between the transmitter and the radio, the signal will be distorted in the form of electrostatic noise or rapid volume fluctuations. These distortions can be removed by cutting off the upper frequencies with the tone control.
Swapping stations - As the FM signal weakens, another, stronger station operating on a similar frequency may begin to be received simultaneously, as Your audio system is designed to receive the purest possible signal. In this case, switch to a station with a stronger signal.
Interference Distortion - Receiving signals from different directions can cause reception distortion or «flutter». This is due to the reception of the direct and reflected signals of the same station or the signals of two stations operating at close frequencies. In this case, switch to another station until the interference disappears.
Using a cell phone or radio station
Using a cell phone may cause noise in the audio system. This does not mean that the audio system is faulty. In this case, use your cell phone as far away from the audio system as possible.
Attention: When using a cell phone or radio station in the car, a separate outdoor antenna must be installed. Operating a cell phone or walkie-talkie only through the indoor antenna may interfere with certain types of electrical equipment and adversely affect vehicle systems.
Warning: Do not use a cell phone while driving. To do this, stop in a safe place.