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Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) are two distinct forms of interference which have very detrimental effects on electronic components. RFI occurs when an outside source of radio frequency energy (RF) interacts with a device connected to the power line. EMI occurs when an electromagnetic field generated by one source of energy affects another, such as when light waves cause a radio signal to become distorted. 

The prevention of RFI and EMI is essential for proper performance of any electronic device. The most effective means of protection is to employ RF and EMI contacts, fingerstock, and gaskets. RFI and EMI contacts are typically made from copper and other conductive materials and provide an effective shield between electronic components and the environment. The shield of contacts blocks the passage of RF energy from outside the system, while allowing electromagnetic signals, such as television signals and telephone signals, to pass through.

Fingerstock is another effective shield against RFI and EMI. Fingerstock is constructed from a conductive material such as aluminum or brass and is used to form a protective electromagnetic barrier between the device and its exterior environment. It acts to absorb and/or reflect electromagnetic energy, while still allowing signals to pass through. Fingerstock can be used to separate wires and cables, as well as to reduce the transfer of EMI from one wire to another.

Gaskets are also an important component of RFI and EMI protection. They are commonly used around electrical control panels, enclosures, and external connectors. Gaskets are often made of conductive rubber or a similar material and are used to protect against the transfer of EMI between components. The gasket helps to form a physical barrier between the components, while also acting as an insulator against the transfer of RFI.

RFI and EMI protection components provide a crucial layer of protection against the damaging effects of interference. The use of RFI and EMI contacts, fingerstock, and gaskets is essential for any electronic application and can help to ensure that the performance of the device is not affected by outside sources of energy.

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