{"id":692354,"date":"2024-11-06T05:29:10","date_gmt":"2024-11-06T05:29:10","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/tia-eia-526-192000\/"},"modified":"2024-11-06T05:29:10","modified_gmt":"2024-11-06T05:29:10","slug":"tia-eia-526-192000","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/tia\/tia-eia-526-192000\/","title":{"rendered":"TIA\/EIA-526-19:2000"},"content":{"rendered":"<p><strong>Introduction<\/strong><\/p>\n<p><strong>Intent<\/strong><\/p>\n<p>At the optical interfaces within wavelength-division multiplexed<br \/>\n(WDM) networks, it is desirable to measure parameters that provide<br \/>\ninformation about the integrity of the physical plant. Such<br \/>\nparameters are necessary to <i>monitor<\/i> network performance as<br \/>\nan integral part of network management. They are also necessary to<br \/>\nassure proper system operation for <i>installation and<br \/>\nmaintenance<\/i> of the network.<\/p>\n<p>Ideally, such parameters would directly correspond to the bit<br \/>\nerror ratio (BER) of each channel of a multichannel carrier at the<br \/>\nparticular optical interface. Related parameters such as Q-factor<br \/>\nor those calculated from optical eye patterns would provide similar<br \/>\ninformation, that is, they would correlate to the channel BER.<br \/>\nHowever, it is difficult to obtain access to these parameters at a<br \/>\nmultichannel interface point. It is necessary to demultiplex the<br \/>\npotentially large number of channels and make BER, Q-factor, or<br \/>\neye-diagram measurements on a per-channel basis.<\/p>\n<p>In contrast, useful information about the optical properties of<br \/>\nthe multichannel carrier is readily obtained by measuring the<br \/>\noptical spectrum. Wavelength-resolved signal and noise levels<br \/>\nprovide information on signal level, signal wavelength, and<br \/>\namplified spontaneous emission (ASE) for each channel. Spectral<br \/>\ninformation, however, does not show signal degradation due to<br \/>\nwaveshape impairments resulting from polarization-mode dispersion<br \/>\n(PMD), and chromatic dispersion. Also, intersymbol interface and<br \/>\ntime jitter are not revealed from an OSNR measurement. In spite of<br \/>\nthese limitations, OSNR is listed as an interface parameter in<br \/>\nITU-T draft Recommendation G.692; &#034;Optical interfaces for<br \/>\nmultichannel systems with optical amplifiers.&#034; It is also proposed<br \/>\nthat OSNR be listed in ITU-T draft recommendation G.959.1, &#034;Optical<br \/>\nnetworking physical layer parameters.&#034;<\/p>\n<p>This OFSTP provides a parameter definition and a test method for<br \/>\nobtaining optical signal-to-noise ratio (OSNR) using apparatus that<br \/>\nmeasures the optical spectrum at a multichannel interface. Three<br \/>\nimplementations for an optical spectrum analyzer (OSA) are<br \/>\ndiscussed: a diffraction-grating-based OSA, a Michelson<br \/>\ninterferometerbased OSA, and a Fabry-Perot-based OSA. Performance<br \/>\ncharacteristics of the OSA that affect OSNR measurement accuracy<br \/>\nare provided.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>OFSTP-19 Optical Signal-to-Noise Ratio Measurement Procedures for Dense Wavelength-Division Multiplexed Systems<\/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>2000<\/td>\n<td>26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":692366,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2646],"product_tag":[],"class_list":{"0":"post-692354","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\/692354","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\/692366"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=692354"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=692354"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=692354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}