{"id":691266,"date":"2024-11-06T05:25:01","date_gmt":"2024-11-06T05:25:01","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/tia-455-204-a2013\/"},"modified":"2024-11-06T05:25:01","modified_gmt":"2024-11-06T05:25:01","slug":"tia-455-204-a2013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/tia\/tia-455-204-a2013\/","title":{"rendered":"TIA-455-204-A:2013"},"content":{"rendered":"<p>This part of IEC 60793 describes three methods for determining<br \/>\nand measuring the modal bandwidth of multimode optical fibres (see<br \/>\nIEC 60793-2-10, IEC 60793-30 series and IEC 60793-40 series). The<br \/>\nbaseband frequency response is directly measured in the frequency<br \/>\ndomain by determining the fibre response to a sinusoidaly modulated<br \/>\nlight source. The baseband response can also be measured by<br \/>\nobserving the broadening of a narrow pulse of light. The calculated<br \/>\nresponse is determined using differential mode delay (DMD) data.<br \/>\nThe three methods are:<\/p>\n<ul>\n<li>Method A \u2013 Time domain (pulse distortion) measurement<\/li>\n<li>Method B \u2013 Frequency-domain measurement<\/li>\n<li>Method C \u2013 Overfilled launch modal bandwidth calculated from<br \/>\ndifferential mode delay (OMBc)<\/li>\n<\/ul>\n<p>Methods A and B can be performed using one of two launches: an<br \/>\noverfilled launch (OFL) condition or a restricted mode launch (RML)<br \/>\ncondition. Method C is only defined for A1a.2 (and A1a.3 in<br \/>\npreparation) multimode fibre and uses a weighted summation of DMD<br \/>\nlaunch responses with the weights corresponding to an overfilled<br \/>\nlaunch condition. The relevant test method and launch condition<br \/>\nshould be chosen according to the type of fibre.<\/p>\n<p>NOTE 1 These test methods are commonly used in production and<br \/>\nresearch facilities and are not easily accomplished in the<br \/>\nfield.<\/p>\n<p>NOTE 2 OFL has been used for the modal bandwidth value for<br \/>\nLED-based applications for many years. However, no single launch<br \/>\ncondition is representative of the laser (e.g. VCSEL) sources that<br \/>\nare used for gigabit and higher rate transmission. This fact drove<br \/>\nthe development of IEC 60793-1-49 for determining the effective<br \/>\nmodal bandwidth of laser optimized 50 mm fibres. See IEC<br \/>\n60793-2-10:2004 or later and IEC 61280-4-1:2003 or later for more<br \/>\ninformation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>FOTP-204 Measurement of Bandwidth on Multimode Fiber<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/tia\/\"><b>TIA<\/b><\/a><\/td>\n<td>2013<\/td>\n<td>36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":691277,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-691266","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\/691266","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\/691277"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=691266"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=691266"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=691266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}