Attach a launch reference cable to the test source of the proper wavelength (some splitters are wavelength dependent), calibrate the output of the launch cable with the meter to set the 0dB reference, attach to the source launch to the splitter, attach a receive launch. With the use of an additional preattenuator beam splitter, the attenuation range can be extended to over 70 dB. Whether an optical splitter is combining signals in the upstream direction or dividing signals in the downstream direction, it still introduces the same attenuation to an optical input signal. Testing a splitter or other passive fiber optic devices like switches is little different from testing a patchcord or cable plant using the two industry standard tests, OFSTP-14 for double-ended loss (connectors on both ends) or FOTP-171 for single-ended testing. This Applications Engineering Note (AEN 135) explains and recommends standard measurement methods for characterizing optical fiber system performance. This note also provides background information on system link configurations, test equipment and system component considerations that influence. 77-858 (Accessed February 10, 2025) If you have any questions about this publication or.
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