IEC 62783-2:2019 pdf download

IEC 62783-2:2019 pdf download.Twinax cables for digital communications – Part 2: Family specification – Cable for Ethernet-over-twinax physical interfaces
1 Scope
This part of IEC 62783 covers indoor cables and specifies the definitions and requirements of twin-axial cables used in digital communication systems. This document, which is a family specification, gives additional requirements for twinax cables for use in IEEE Std 802.3 Ethernet physical interfaces. This document gives requirements and transmission characteristics for single twinax elements as well as for multiple twinax elements within the same sheath, i.e. “twinax cable”.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC TR 61156-1-2 2 :2009, Multicore and symmetrical pair/quad cables for digital communications – Part 1-2: Electrical transmission characteristics and test methods of symmetrical pair/quad cables IEC TR 61 1 56-1 -2:2009/AMD1 :201 4 IEC 62783-1:— 3 , Twinax cables for digital communications – Part 1: Generic specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62783-1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp
4 Requirements for cables construction
4.1 General remarks These twinax cables’ characteristic impedance is 1 00 Ω. These twinax cable configurations range from 2 to 20 twinax elements, depending on the specific Ethernet implementation. Conductor size may range from 0,2 mm to 0,6 mm (32 AWG to 22 AWG). 4.2 Cable construction 4.2.1 General The cable element and the cable shall be constructed accordingly to conform to IEC 62783-1 and to this document. 4.2.2 Conductor The conductor shall conform to IEC 62783-1 and to the detail specifications. 4.2.3 Insulation The insulation shall conform to IEC 62783-1 and to the detail specifications. 4.2.4 Colour code The colour code shall conform to the detail specifications. 4.2.5 Drain wire The drain wire shall conform to IEC 62783-1 and to the detail specifications. 4.2.6 Screening of cable assembly element The cable element screen shall conform to IEC 62783-1 and to the detail specifications. 4.2.7 Cable make-up The twinax cable consisting of 2 to 20 twinax elements as per Table 1 , shall conform to IEC 62783-1 and to the detail specifications.
5.2 Electrical tests 5.2.1 Conductor resistance The conductor resistance shall conform to IEC 62783-1 and to the detail specifications. 5.2.2 Resistance unbalance The resistance unbalance shall conform to IEC 62783-1 and to the detail specifications. 5.2.3 Dielectric strength Dielectric strength shall conform to IEC 62783-1 and to the detail specifications. 5.2.4 Insulation resistance Insulation resistance shall conform to IEC 62783-1 and to the detail specifications. 5.2.5 Mutual capacitance Mutual capacitance shall conform to IEC 62783-1 and to the detail specifications. 5.2.6 Surface transfer impedance Surface transfer impedance of the screen shall conform to IEC 62783-1 and to the detail specifications. 5.3 Transmission requirements and tests 5.3.1 General Transmission requirements shall conform to IEC 62783-1 and to the detail specifications, over the frequency range specified in the detail specifications. Transmission requirements’ conformance is determined in accordance with IEC 62783-1 using test procedures according to IEC TR 61 1 56-1 -2:2009/AMD1 :201 4. 5.3.2 Characteristic impedance The nominal characteristic impedance, 1 00 Ω, shall conform to IEC 62783-1 and to the detail specifications. 5.3.3 Return loss The return loss shall conform to IEC 62783-1 and to the detail specifications. 5.3.4 Attenuation The attenuation shall conform to IEC 62783-1 and to the detail specifications. 5.3.5 Propagation delay, inter-element delay skew, and intra-element delay skew Propagation delay, inter-element delay skew, and intra-element delay skew shall conform to IEC 62783-1 and to the detail specifications. 5.3.6 Near-end crosstalk (NEXT) The near-end crosstalk (NEXT) loss shall conform to IEC 62783-1 and to the detail specifications.