IEC 61196-3:1998 pdf download

IEC 61196-3:1998 pdf download

IEC 61196-3:1998 pdf download.Radio frequency cables – Part 3: Sectional specification for coaxial cables for local area networks
1 General
1.1 Scope and object
This sectional specification specifies requirements for radio frequency coaxial cables for local
area networks.
The object of this sectional specification is to prescribe recommended ratings and characteristics and to select from the generic specification the appropriate quality assessment procedures, test and measuring methods, and to give general performance requirements for coaxial cables for local area networks plus complementary test methods. Test severities and requirements prescribed in detail specifications referring to this sectional specification should be of equal or higher performance levels. When the requirements of IEC 61 1 96-1 and of this sectional specification conflict with each
other, this sectional specification shall prevail.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61 1 96. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61 1 96 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60028:1 925, International standard of resistance for copper
IEC 60050(461 ):1 994, International Electrotechnical Vocabulary (IEV) – Chapter 461 : Electric
cables
IEC 601 69, Radio-frequency connectors
IEC 60304:1 982, Standard colours for insulation for low-frequency cables and wires
IEC 60332-1 :1 993, Tests on electric cables under fire conditions – Part 1 : Test on a single
vertical insulated wire or cable
IEC 61 1 96-1 :1 995, Radio-frequency cables – Part 1 : Generic specification: General,
definitions, requirements and test methods
1.3 Definitions
For the purpose of this specification, the terms and definitions given in IEC 61 1 96-1 ,
IEC 60050(461 ) and the following apply.
1.3.1 local area network
a network provided within the premises
1.3.2 loop DCR
summation of the d.c. resistances of the inner conductor and outer conductor (or screen) of a
specified length of cable
1.3.3 loamed dielectric cable
cable in which all the space between the inner conductor and the outer conductor (or screen) is
filled by a cellular dielectric. The cellular structure is uniformly distributed between the
conductors and may be covered by a skin (solid dielectric) layer.
[IEC 61 1 96-1 :1 995, definition 3.2.1 8]
1.3.4 optimized braid
one in which the braid angle, filling factor and wire diameter are chosen so as to result in a
minimum measured surface transfer impedance magnitude on a specified frequency range
2 Materials and cable construction
2.1 General
Materials used shall comply with the requirements specified in IEC 61 1 96-1 , except where such
requirements are modified by this specification.
2.2 Cable construction
The cable construction shall be in accordance with the requirements given in the relevant detail
specification.
2.3 Inner conductor
2.3.1 Conductor material
The inner conductor shall consist of plain or tinned annealed copper uniform in quality and free
from defects.
The properties of the copper shall be in accordance with IEC 60028 and if the inner conductor
is tinned, it shall be tested in accordance with IEC 61 1 96-1 , 5.5.2.1 .
2.3.2 Conductor construction
The construction of the inner conductor shall be as specified in the relevant detail specification.
Where the inner conductor consists of a single wire there shall be no joints in the wire made
after the last drawing operation.
Joints in individual strands of a stranded conductor shall be cold pressure welded, brazed or
silver soldered using a non-acid flux such that the strand diameter shall not be increased.
No joint in an individual strand shall be within 0,3 m of a joint in any other individual strand.
2.4 Dielectric
The type of dielectric required for each cable shall be specified in the relevant detail
specification.
The diameter over dielectric, the ovality and the eccentricity shall be given in the relevant detail
specification.
2.5 Outer conductor or screen
The construction and material of the outer conductor and/or screen shall be as specified in the
relevant detail specification.
The copper braid wires shall be uniform in quality and free from defects.
The properties of the copper shall be in accordance with IEC 60028, and if the copper wire is
tinned, it shall be tested in accordance with IEC 61 1 96-1 , 5.5.2.1 .

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