IEC/TR 61156-1-2 Ed. 1.0现行
Multicore and symmetrical pair/quad cables for digital communications Part 1-2: Electrical transmission characteristics and test methods of symmetrical pair/quad cables
出版：International Electrotechnical Committee
专家解读视频
IEC/TR 61156-1-2:2009(E) is a revision of the symmetrical pair/quad electrical transmission characteristics present in IEC 61156-1:2002 (Edition 2) and not carried into IEC 61156-1:2007 (Edition 3). This technical report includes the following topics from IEC 61156-1:2002 - the characteristic impedance test methods and function fitting procedures of 3.3.6; - Annex A covering basic transmission line equations and test methods; - Annex B covering the open/short-circuit method; - Annex C covering unbalance attenuation.
PD IEC TR 61156-1-2:2009 - Identical
