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REF is used to test the attenuation value of light (relative power loss test). Press REF to display the value of attenuated optical power. Universal for FC/SC/ST/LC interface. Supports wavelengths of 850/980/1310/1490/1550/1625nm, and allows unit switching between dBm, mW, µW, and nW.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.