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- A diafonia é a interferência que um par provoca no par adjacente, este fenômeno é conhecido em telefonia como linha cruzada. A diafonia é medida transmitindo-se um sinal por um cabo e medindo o sinal induzido nos demais pares, em um cabo de quatro pares haverá seis possíveis combinações. A norma especifica um valor mínimo de atenuação admitida para o cabo. cabeam7 - by Carla Lopes
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- Significado de diafonia
sf (gr diaphonía) 3 Eletr Interferência prejudicial no acoplamento de circuitos de comunicação, de que resulta som confuso. - dicionário online de português
by Carla Lopes - Crosstalk
O que é CROSSTALK?
Quando um sinal elétrico trafega num condutor, gera ao redor deste, um campo elétrico. Crosstalk ou diafonia é a medida da interferência elétrica gerada em um par pelo sinal que está trafegando num par adjacente dentro do mesmo cabo. A menor interferência acarreta um melhor desempenho do crosstalk ou diafonia (mais dBs de isolamento). A baixa interferência entre pares é crítica para a confiabilidade das aplicações das categorias 3, 4 e 5 para cabos UTP de 4 pares exigem uma avaliação do crosstalk, ou diafonia, com o método par a par (NEXT). As especificações da norma ANSI TIA/EIA 568A para cabos de 25 pares exigem uma avaliação do crosstalk através do método da somatória das potências (Power Sum). - ABUSAR.ORG
by Carla Lopes - Related KudoZ question
Compare [close] Compare [close] - Greek
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- Η διαφωνία(cross talk) είναι γενικά το φαινόμενο οπου εχουμε ανεπιθύμητη μεταβίβαση ενέργειας απο
ενα κύκλωμα σε ένα γειτονικό κύκλωμα, που εχει ως συνεπεια την παρενόχληση της μετάδοσης
σ' αυτο το κύκλωμα. Δηλαδή το Η/Μ πεδίο του ενός κυκλώματος επιδρα στο αντίστοιχο Η/Μ πεδίο
του αλλου. Μια μορφή διαφωνίας που εχουμε αντιληφθεί ολοι μας, ειναι το λεγομενο "μπερδεμα"
των γραμμων του τηλεφωνου - ενώ μιλαμε ακουμε και αλλους συνομιλητές (παλιοτερα που ειχαμε τα
αναλογικα ειδικα...) adsl.gr - by Ioannis Chatzilaris
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- Διαφωνία(Crosstalk)
Παραμόρφωση που επάγεται σε διπλαγωγό από γειτονικούς διπλαγωγούς.
Συνήθως όταν τα ζεύγη τοποθετούνται κοντά, όπως συμβαίνει στα τηλεφωνικά καλώδια. - Τηλεφωνία
by Ioannis Chatzilaris - Διαφωνία :
Η διαφωνία οφείλεται στην συνύπαρξη ενός αριθμού ζευγών στο ίδιο καλώδιο και
αναφέρεται στην παρενόχληση λόγω ηλεκτρομαγνητικής ακτινόβολίας, που
υφίσταται ένα ζευγάρι από παρεμβολές προερχόμενες από ένα ή περισσότερα
γειτονικά. - Τ.Ε.Ι. Πειραιά
by Ioannis Chatzilaris - Το μέγεθος του διακόπτη μπορεί να είναι μέχρι 1×16 και παρουσιάζει αποδεδειγμένη αξιοπιστία, χαμηλή απώλεια λόγω παρεμβολής (insertion loss), μικρή απώλεια εξαιτίας διασποράς πόλωσης και χαμηλή διαφωνία (crosstalk). - Εθνικό Μετσόβιο Πολυτ
by Ioannis Chatzilaris - Related KudoZ question
Compare [close] - Swedish
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- Överhörning, inom elektroniken, och framför allt inom teletekniken, betyder oönskat bidrag av signal från en annan kanal i överföringen av signaler. Exempelvis kan man ibland i en telefon svagt höra ett annat samtal än det egna. Nationalencyklopedin - by L. K.
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- Överhörning mäts i decibel (db) som skillnaden mellan signalstyrkan i det sändande paret och det störda paret. - Wikipedia
by L. K. - Överhörning mellan två ledare över jordplan beror på impedansen i ledarnas ändar. - Emicon
by L. K. - Related KudoZ question
Compare [close] - Vietnamese
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- nhiễu xuyên âm: loại nhiễu xuất hiện khi 2 hoặc nhiều đường tín hiệu bị nhiễu sang nhau gây ra hiện tượng tín hiệu của đường truyền này lại trở thành nhiễu của đường truyền kia và ngược lại. Own research - by Tiến Anh Lê
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- nhiễu xuyên âm: loại nhiễu xuất hiện khi 2 hoặc nhiều đường tín hiệu bị nhiễu sang nhau gây ra hiện tượng tín hiệu của đường truyền này lại trở thành nhiễu của đường truyền kia và ngược lại. - smilestranslation.com
by Tiến Anh Lê - Related KudoZ question
Compare [close] - Latvian
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- Nevēlama elektriskās enerģijas pārvade no viena sakaru kanāla otrā, kas rada pārraidāmā signāla kropļojumus. Parasti šī parādība novērojama starp blakus esošiem sakaru kanāliem. LZA TK - by Kaspars Gasuns
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Compare [close] - Norwegian
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- Krysstale kan forekomme i elektroniske kretser, i telekommunikasjon, inklusive trådløs kommunikasjon, i såvel analoge som digitale systemer, samt i akustiske systemer (v f eks musikkopptak). Krysstale skriver seg fra elektromagnetisk kopling (kapasitiv eller induktiv), lekkasjeledning, eller akkustisk signallekkasje. I digitale systemer kan den skyldes interferens pga overlapp i bruken av signaleringssystem, og forøvrig enhver overlappende signaltransmisjon i frekvensbånd (analogt) eller i symbolinterferens (digital kode), slik at kanalseparasjonen blir for dårlig. Begrepet brukes idag i industrien selv om ikke talesignaler er involvert i transmisjonen - det kan være digitale signaler som f eks representerer målestørrelser. Own research - by montanus
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- Et signal som sendes ut på et kobberpar har en gitt rekkevidde, bestemt av signalets nivå (styrke), frekvensbånd og kobbertrådenes elektriske egenskaper: Høyere frekvenser må kompenseres med høyere nivå for å opprettholde rekkevidden. Samtidig vil et signal, til en viss grad, forstyrre andre abonnenters signaler på andre kabelpar i samme kabel (eller gruppe i kabelen). Det er dette som kalles krysstale, dvs. at et signal delvis smitter over til et annet kobberpar, og graden av krysstale varierer sterkt med kvaliteten på kobberkablene - Wikipedia
by montanus - RS-232 har også relativt dårlig kontroll over tiden mellom skifting av spenningsnivå, noe som kan forårsake krysstale. - Wikipedia
by montanus - Dette skal gjøre kommunikasjonen mellom minnekontrolleren og selve minnet mer robust, ved at man kan redusere blant annet krysstale og elektromagnetisk interferens. - digi.no
by montanus - Related KudoZ question
Compare [close] - Danish
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- Uønsket overkobling af en del af et elektrisk signal i én ledning til et signal i en anden ledning. Den Store Danske Encyklopædi - by Joern Wennerstroem
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- nden for telekommunikation og datatransmission er krydstale uønskede elektriske signaler, som opstår ved elektromagnetisk eller elektrisk påvirkning mellem strømførende ledere. Krydstale forekommer især ved overførsel af elektriske signaler gennem kabler med flere signalledere. - Version2.dk
by Joern Wennerstroem - Lær at estimere, beregne og simulere signal-integritetsproblemerne før de opstår. Forstå hvordan man sætter tal på reflektioner, krydstale, ground-bounce og forsyningsripple. - Axcon
by Joern Wennerstroem - Related KudoZ question
Compare [close] - English
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- Crosstalk is a type of Interference from an adjacent channel or wire, which is caused by electromagnetic interference, along a circuit or a cable pair. A telecommunication signal disrupts a signal in an adjacent circuit and can cause the signals to become confused and cross over each other. Javvin Technologies, Inc.
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- Crosstalk originating from multiple high-speed data services in the same telephone bundle is a limiting factor for the maximum bit rate, the loop length and the number of data services that a bundle can support. - The Pennsylvania State University
by - All current crosstalk mitigation techniques require precise knowledge of the crosstalk coupling functions between the twisted pair wires carrying DSL service within a cable binder. - Rice Scholarship
by - Optical bidirectional transmission systems, such as subscriber systems, where two signals are carried over a single fibre are subject to optical crosstalk. This crosstalk causes an unwanted increase of the bit error rate at the receivers in both channels. - Institute of Physics and IOP Publishing
by - Compare this term in: Serbian, Croatian, Albanian, Bulgarian, Czech, Chinese, German, Dutch, Spanish, Persian (Farsi), Finnish, French, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Polish, Romanian, Russian, Slovak, Slovenian, Turkish, Ukrainian
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