Grand Caravan V6-4.0L (2008)
Radio/Stereo Noise Filter: Description and Operation
Description
DESCRIPTION
Radio noise suppression devices are factory-installed standard equipment on this vehicle. Radio Frequency Interference (RFI) and Electromagnetic
Interference (EMI) can be produced by any on-board or external source of electromagnetic energy. These electromagnetic energy sources can radiate
electromagnetic signals through the air, or conduct them through the vehicle electrical system.
When the audio system converts RFI or EMI to an audible acoustic wave form, it is referred to as radio noise. This undesirable radio noise is generally
manifested in the form of "buzzing," "hissing," "popping," "clicking," "crackling," and/or "whirring" sounds. In most cases, RFI and EMI radio noise can
be suppressed using a combination of vehicle and component grounding, filtering and shielding techniques. This vehicle is equipped with
factory-installed radio noise suppression devices that were designed to minimize exposure to typical sources of RFI and EMI; thereby, minimizing radio
noise complaints.
Factory-installed radio noise suppression is accomplished primarily through circuitry or devices that are integral to the factory-installed radios, audio
power amplifiers and other on-board electrical components such as generators, wiper motors, blower motors, and fuel pumps that have been found to be
potential sources of RFI or EMI.
