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RF interference (RFI) and Electromagnetic interference (EMI) are both common sources of interference in electronic equipment. The use of contacts, fingerstocks and gaskets can drastically reduce these types of interference. It is important to understand how they all work together in order to make sure your equipment functions properly.

What is RFI and EMI?

RFI stands for radio frequency interference, and EMI stands for electromagnetic interference. Both are types of interference that can disrupt the operation of electronic equipment. The source of RFI is usually an outside source, such as a distant radio station, while EMI is generally caused by the equipment itself. RFI can be caused by stray electrical fields, radio or TV signals, and power lines. EMI is caused by the equipment’s own magnetic fields.

Why Are Contacts, Fingerstocks and Gaskets Used?

Contacts, fingerstocks and gaskets are used in order to prevent the device from being interfered with by either RFI or EMI. They serve as a barrier, blocking out any signals that may cause disruption. The contact is typically a metal conductor, such as copper or brass, while the fingerstock is usually an insulator, such as silicone or polyurethane. The gasket is also usually an insulator, but it is designed to create a firm seal between the contact and the device, making sure that the interference is completely blocked.

How Do Contacts, Fingerstocks and Gaskets Work?

When the device is plugged in, the contact establishes a current connection between the two. This connection serves to limit any outside interference by providing the device with a higher level of protection. The contact acts as a filter and reduces the voltage and current levels that could potentially cause disruption. The fingerstock and gasket then form an additional barrier between the contact and device, further blocking out any interference.

The gasket provides extra protection against the interference because it creates a tight seal between the contact and device. This prevents the interference from entering or leaving the device. It also eliminates any chance of static build up, which can cause disruption. The gasket is also able to withstand higher temperatures than the contact and fingerstock, which makes it suitable for use in areas where there is a lot of heat.

Conclusion

Contacts, fingerstocks and gaskets are all important components that work together to reduce RFI and EMI. They provide a barrier between the equipment and any outside sources of interference, ensuring that your equipment functions properly. It is important to understand how they work in order to make sure that your equipment is properly protected from interference.

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