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Sending signals into and out of an RF Shielded enclosure presents some contradictory issues. The enclosure is designed to shield out any RF signals but we need to measure a device's response to various stimuli across the enclosure's barrier. JRE Test offers a variety of high performance filtered I/O adapters for popular data signal formats such as USB and Ethernet and even a Universal Filtered Interface for a wide variety of signals such as: Automotive Ethernet, CAN, BroadR, 100/1000BaseT1, FlexRay, 802.3, LVDS, CML, RS232/422/485, Audio, TRS/XLR, and 20mA current loop. Also available are general purpose simple capacitive filtered DB style connectors. Each I/O device, whether a USB filter, Ethernet filter or even a filtered feed-through capacitor, is specified with an isolation spec. This is the isolation expected when using that one filter, for example the JRE USB2-1 is spec’d at 80 dB up to 1 GHz. So by adding a JRE USB2-1 to a test enclosure, you can expect the entire test enclosure system to have isolation of 80 dB, even though the native test enclosure is specified at 100 dB. Note that the test enclosure system isolation is only as good as its weakest link. Some of these filters are patent-protected (“Radiofrequency Filter with Improved Attenuation of Common Mode Signals”: US Patent 10,374,572B2 & US Patent 10,644,670) For advice on selecting an Interface Filter please call our Tech Support line.
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