[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-656874-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-656874-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","application-note-understanding-eye-pattern-measurements","Application Note - Understanding Eye Pattern Measurements","","This application note explains the fundamentals of eye diagrams and how eye mask measurements are defined for high-speed optical links at 10 Gbps. It describes how high-speed sampling oscilloscopes generate eye diagrams by accumulating instantaneous samples, enabling analysis of noise, jitter, eye opening, and BER degradation. The document also outlines the measurement technology and the value of accumulating samples to improve statistical relevance for amplitude and time distortion assessment and transmitter compliance verification.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/application-note-understanding-eye-pattern-measurements/656874/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/application-note-understanding-eye-pattern-measurements/656874.png","ImageObject",300,407,{"name":42,"@type":43},"Grenda","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-27","2026-10-25",true,{"@type":52,"interactionType":53,"userInteractionCount":26},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What is an eye diagram used for in high-speed digital systems?","Question",{"text":62,"@type":63},"An eye diagram is used to understand signal impairments, verify transmitter output compliance, and diagnose amplitude and time distortion elements that degrade BER.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How does sampling oscilloscope technology contribute to eye diagram creation?",{"text":67,"@type":63},"It captures the signal with sufficient bandwidth and forms a statistical X-Y database from accumulated samples, which is then displayed as an eye diagram for analysis.",{"name":69,"@type":60,"acceptedAnswer":70},"Does an eye diagram reveal protocol or logic problems?",{"text":71,"@type":63},"No. It does not detect protocol or logic problems, but it makes physical-layer signal impairments in amplitude and time easier to view.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},656874,1793064336,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":102,"slug":103},6,50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":101,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":26,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":117,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":143,"read_time":102},7971474921005,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Application Note  \nUnderstanding Eye Pattern Measurements  \nIntroduction  \nThe growth of high-speed Internet has driven data-transmission technology to fully commercialize on 10 Gbps data rates for use in metro and access segments of the next generation network. A key enabling component in the physical layer is the transceiver module, which enables vital transmit and receive operations at the end of each fiber optic link. Transceiver modules, such as the XFP/SFP/SFP+ configurations, are governed by Multi-Source Agreements that ensure consistency between suppliers with requirements for eye mask measurements. These eye mask definitions specify transmitter output performance in terms of normalized amplitude and time in such a way to ensure far-end receivers can consistently tell the difference between one and zero levels in the presence of timing noise and jitter.  \nThe measurement instrument that verifies eye mask compliance is commonly referred to as a high-speed sampling oscilloscope. This instrument class measures samples of the input signal to form an eye diagram that can be used for analysis of the signal’s noise, jitter, and eye mask compliance. The ability to accumulate and display samples supports statistical analysis techniques for assessing the quality of the digital signal, but does not detect protocol or logic problems. The quality of digital signals is simple to see with an eye diagram: Bit-Error-Rate (BER) degrades with eye closure. Figure 1 shows two Anritsu instruments that feature the latest in eye pattern analysis for manufacturing and field applications.  \nFigure 1. Low-cost, high performance, eye pattern analyzers are essential tools for verifying that eye mask compliance tests of 10 Gbps transmitter outputs adhere to industry standards. Shown are new instruments from Anritsu, the MP2100A BERTWave™ and the MP1026B Bit Master™.  \nThis application note reviews basic eye diagram definitions and terminologies, and presents several typical examples of measurement applications. Its objective is to present practical information that will help engineers conduct 10 Gbps eye pattern measurements using the eye pattern analyzer.  \nEye Pattern Fundamentals  \nAn eye diagram is a useful tool for understanding signal impairments in the physical layer of high-speed digital data systems, verifying transmitter output compliance, and revealing the amplitude and time distortion elements that degrade the BER for diagnostic purposes. By taking high-bandwidth instantaneous samples of a high-speed digital signal, an eye diagram is the sum of samples from superimposing the 1’s, 0’s, and corresponding transition measurements. What results is an image that reveals the “eye” of the eye diagram, as shown in Figure 􀀲 .  \nFigure 2. An eye diagram results from superimposing the “0”s and“1”s of a high-speed digital data stream.  \nFor easy viewing, the time axis in Figure 􀀲 is normalized  \nfor 􀀲 bits, with the 1 bit “eye opening” in the center of the display and 1/􀀲 bit to the left and right of the center eye for capturing rise/fall-time transitions. Note that any data bits in the rise/fall transitions of the digital signal that infringe on the center of the eye opening may cause data errors and will be discussed later in the application note.  \nAlthough the eye pattern in Figure 􀀲 depicts some noise and jitter, other forthcoming examples will show data system waveforms with considerably more noise and a center eye that closes more significantly. Generally speaking, the more open the eye is (indicated by the arrows in the diagram), the lower the likelihood that the receiver in the transmission system will mistake a logical 1 bit for a logical 0 bit, or vice versa. These logic decisions require a certain margin of signal differential between the 0 and the 1 level. Noise, both amplitude and time jitter, reduces that margin and is logically depicted in Figure 􀀲 as some closure of the eye opening. The ratio of bits that have errors, compared to th","cbCaiesXmUQVEOjg","https://ap.wps.com/l/cbCaiesXmUQVEOjg","pdf",2904408,"English","# Introduction\n# Eye Pattern Fundamentals\n# Eye Pattern Measurement Technology\n# Typical Setup for Eye Pattern Measurements","[{\"question\":\"What is an eye diagram used for in high-speed digital systems?\",\"answer\":\"An eye diagram is used to understand signal impairments, verify transmitter output compliance, and diagnose amplitude and time distortion elements that degrade BER.\"},{\"question\":\"How does sampling oscilloscope technology contribute to eye diagram creation?\",\"answer\":\"It captures the signal with sufficient bandwidth and forms a statistical X-Y database from accumulated samples, which is then displayed as an eye diagram for analysis.\"},{\"question\":\"Does an eye diagram reveal protocol or logic problems?\",\"answer\":\"No. It does not detect protocol or logic problems, but it makes physical-layer signal impairments in amplitude and time easier to view.\"}]","Application Note - Understanding Eye Pattern Measurements | PDF",1792971287]