These test methods describe procedures for measuring the attenuation
\nby substitution of short
\nlength multimode graded index and single-mode optical fiber cable
\nassemblies. The cable assemblies
\nhave a connector on only one end of the cable (pigtail) or have
\nconnectors on both ends of the
\ncable (patch cord). The connectors on the patch cord may be identical
\nor different from each other.<\/p>\n
These tests are primarily used for multimode cables of 100 meters or
\nless in length and for
\nsingle-mode cables of any length. These tests primarily evaluate
\nconnector loss since the fiber
\nloss is usually a small portion of the total loss. For those
\nassemblies that are long enough for
\nthe fiber loss to be a significant portion of the loss, the fiber loss
\nwill have to be taken into
\naccount when specifying limits for the measured loss.<\/p>\n
It is important to emphasize that measurement of the loss of a given
\ncable assembly during a
\nfactory test will not necessarily be the same as a loss measurement of
\nthe same cable assembly in
\nactual field use. The actual loss of the cable assembly depends on the
\nproperties of all of the
\nmating components, the orientation of the components, and the launch
\ncondition of the light as it
\nenters the connection. In a factory test only the components that are
\npart of the cable assembly to
\nbe tested are accessible. The connector(s) that will be mated to the
\ncable assembly in actual field
\nuse are not. Even though factory loss measurements are not necessarily
\nthe same as loss
\nmeasurements in actual field use, the concatenation test is presented
\nhere as a suitable
\nalternative which provides an estimate of average system loss
\nperformance.<\/p>\n
NOTE – The results of this test method are not directly comparable
\nwith those of FOTP-34, which is
\nan interconnection device insertion loss test. This FOTP tests cable
\nassemblies and FOTP-34 tests a
\ncomplete connection (splice, device, connector set, etc.) installed
\nbetween two like fibers.<\/p>\n","protected":false},"excerpt":{"rendered":"
FOTP-171 Attenuation by Substitution Measurement for Short-Length Multimode Graded-Index and Single Mode Optical Fiber Cable Assemblies<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n TIA<\/b><\/a><\/td>\n 2001<\/td>\n 54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":692277,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-692266","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-tia","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/692266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/692277"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=692266"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=692266"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=692266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}