Signals in the AM and FM bands are transmitted through repeaters located around your city. The signals coming from them are received by the antenna of your car. After that, the signal goes to the radio receiver, and then to the speakers.
When your car receives a strong radio signal, your car's advanced audio system provides high quality playback. However, in some cases, the signal coming into your vehicle is not strong or clear. This may be due to distance from the radio station, proximity to other radio stations, or the presence of buildings, bridges, or other large objects in your area.
Generally, reception of AM signals is better than FM signals. This is because AM radio waves are transmitted at low broadcast frequencies. Long, low-frequency radio waves can propagate in the atmosphere both in a straight line and around the curvature of the earth's surface. Moreover, they can go around different objects and can provide better radio coverage. As a result, DM signals can be clearly received over longer distances than FM signals.
1 - Radio station broadcasting in the FM band
2 - Free area
3 - Mountains
4 - Buildings
5 - Hilly area
6 - Iron bridges
Radio waves in the FM band are transmitted at high broadcast frequencies and cannot go around the earth's surface. As a result, radio waves in the FM band generally begin to weaken at a short distance from the transmitting station. Radio waves in the FM band are more affected by buildings, mountains, or other objects. This may result in poor playback quality, and you may mistake this for a malfunction of your radio. The following conditions are normal and do not indicate a malfunction of the radio:
- Attenuation - As your car's distance from the transmitting antenna of the radio station increases, the radio signal strength decreases and the sound begins to fade, In this case, we recommend that you select another station with a stronger signal.
- Constant Buzzing Noise -- A weak FM radio signal or large obstructions between the radio transmitter and the car's receiving antenna will cause a constant buzzing noise to interfere. This effect can be reduced by lowering the tone control level in the treble region.
- Signal mixing - As the FM signal weakens, another stronger signal with a similar broadcast frequency may appear. This is because your radio has been specially designed to tune in to the clearest signal. In this case, switch to another station with a stronger signal.
- Interference Noise - When radio signals from different directions hit the car's antenna, a constant buzzing noise can be generated. This can be caused by the simultaneous reception of the direct and reflected signals of one radio station or two signals from stations broadcasting at close frequencies by the car's antenna. In this case, switch to another station until these conditions disappear.
Using a cell phone or radio station
If you use a cellular radio telephone in a car, noise may appear in the sound of the audio equipment. This does not indicate a hardware failure. In this case, try to keep the cell phone as far away from the audio equipment as possible.
Attention: In order to be able to use a communication system such as a cell phone or a radio station while in the car, you need to install an optional outdoor antenna. The use of radio transceiver equipment with an antenna located in the passenger compartment in a vehicle may cause electromagnetic interference to the electrical equipment of the vehicle and affect the safety of the vehicle.
Warning: Do not use a cell phone while driving; stop in a safe place to talk on the phone.