BS EN 50289-1-9:2017 - Communication cables. Specifications for test methods. Electrical test methods. Unbalance attenuation (transverse conversion loss TCL transverse conversion transfer loss TCTL)

BS EN 50289-1-9:2017

Communication cables. Specifications for test methods. Electrical test methods. Unbalance attenuation (transverse conversion loss TCL transverse conversion transfer loss TCTL)

Status : Current   Published : March 2017

Format
PDF

Format
HARDCOPY



This European Standard details the test methods to determine the attenuation of converted differential-mode signals into common-mode signals, and vice versa, due to balance characteristics of cables used in analogue and digital communication systems by using the transmission measurement method. The unbalance attenuation is measured in, respectively converted to, standard operational conditions. If not otherwise specified, e.g. by product specifications, the standard operational conditions are a differential-mode which is matched with its nominal characteristic impedance (e.g. 100 Ω) and a common-mode which is loaded with 50 Ω. The difference between the (image) unbalance attenuation (matched conditions in the differential and common-mode) to the operational (Betriebs) unbalance attenuation (matched conditions in differential-mode and 50 Ω reference load in the common-mode) is small provided the common-mode impedance Zcom is in the range of 25 Ω to 75 Ω.

For cables having a nominal impedance of 100 Ω, the value of the common-mode impedance Zcom is about 75 Ω for up to 25 pair- count unscreened pair cables, 50 Ω for common screened pair cables and more than 25 pair- count unscreened pair cables, and 25 Ω for individually screened pair cables. The impedance of the common-mode circuit Zcom can be measured more precisely either with a time domain reflectometer (TDR) or a network analyser. The two conductors of the pair are connected together at both ends and the impedance is measured between these conductors and the return path.

This European Standard is bound to be read in conjunction with EN 50289‑1‑1, which contains essential provisions for its application.




Standard NumberBS EN 50289-1-9:2017
TitleCommunication cables. Specifications for test methods. Electrical test methods. Unbalance attenuation (transverse conversion loss TCL transverse conversion transfer loss TCTL)
StatusCurrent
Publication Date31 March 2017
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
ReplacesBS EN 50289-1-9:2002
International RelationshipsEN 50289-1-9:2017
Draft Superseded By16/30342125 DC
DescriptorsCommunication cables, Electrical measurement, Attenuation, Electric cables, Electrical testing, Digital signals, Electric conductors, Analogue signals, Communication transmission lines, Power losses
ICS33.120.20
Title in FrenchCâbles de communication. Spécifications des méthodes d'essai. Méthodes d'essais électriques. Affaiblissement de disymétrie (perte de conversion longitudinale, perte de transfert de conversion longitudinale)
Title in GermanKommunikationskabel. Spezifikationen für Prüfverfahren. Elektrische Prüfverfahren. Unsymmetriedämpfung (Unsymmetriedämpfung am nahen und am fernen Ende)
CommitteeEPL/46
ISBN978 0 580 94378 2
PublisherBSI
FormatA4
DeliveryYes
Pages26
File Size658 KB
Price£182.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Develop a PAS

Develop a fast-track standardization document in 9-12 months


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


Worldwide Standards
We can source any standard from anywhere in the world