How does EMI/RFI enter in and affect a system?
EMI/RFI interference usually enters a system at various weak points within an audio/video system. It can be inductively introduced into a poorly shielded enclosure and continues to the electronic circuitry. It can be directly coupled through improper ground implementation. It can enter at the various power entry points of an audio/video system. Additionally, if not properly filtered and decoupled, power supplies can often pass on EMI/RFI noise from the incoming AC source to the outputted DC. However, the most common source of EMI/RFI noise is through the system cabling via direct, inductive and/or capacitive coupling. The noise interference here tends to reduce the overall noise floor, decreases the signal-to-noise ratio, clouds and smears the micro-dynamics, and causes signal distortion from destructive interference. In many situations, when poor construction, inadequate shielding, and/or misapplication are factors, system cabling can act as prefect antennas and transmission medians f
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