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GB/T 17737.1-2013: Coaxial communication cables -- Part 1: Generic specification -- General, definitions and requirements Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 17737.1: Historical versions
Similar standardsGB/T 17737.1-2013: Coaxial communication cables -- Part 1: Generic specification -- General, definitions and requirements---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT17737.1-2013 Coaxial communication cables.Part 1. Generic specification.General, definitions and requirements ICS 33.120.10 L26 National Standards of People's Republic of China Partially replace GB/T 17737.1-2000, GB/T 12269-1990 Coaxial communication cables - Part 1. General specification General rules, definitions and requirements Coaxialcommunicationcables-Part 1. Genericspecification- General, definitionsandrequirements (IEC 61196-1.2005, IDT) Released on.2013-12-17 2014-06-15 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued ForewordGB/T 17737 "Coax Communication Cable" is divided into the following parts. --- Part 1. General rules, definitions and requirements; --- Part 2. Polytetrafluoroethylene (PTFE) insulated semi-rigid RF coaxial cable sub-specification; --- Part 3. The specification for coaxial cable for local area networks; --- Part 4. Leakage cable sub-specification; --- Part 5. CATV trunk and distribution cables are divided into specifications. This part is the first part of GB/T 17737. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 17737.1-2000 "RF Cables Part 1. General Specifications, Definitions, Requirements and Tests Law and GB/T 12269-1990 "General Specification for Radio Frequency Cables". Compared with GB/T 17737.1-2000, the main technical changes in this section are as follows. ---Modified the name of the standard (see cover and front page,.2000 version cover and home page); --- Removed attenuation distortion, group delay distortion, impedance uniformity measurement, phase distortion, impedance uniformity and transmission distortion in Chapter 3. Definition (see Chapter 3, Chapter 3 of the.2000 edition); --- Increased characteristic impedance, average characteristic impedance, impedance non-uniformity, shielding efficiency, capacitive coupling, shielding attenuation, self-supporting cable, Definition of overhead cables and suspension lines (see Chapter 3); --- Increased the nominal conductivity level of copper clad steel wire (see 4.4.1); --- Revised the minimum tensile strength of the copper-clad steel wire with a nominal conductivity of 30% (see 4.4.1,.2000 version 5.5.1); --- Increased tensile strength and elongation at break (see 4.5.2); --- Increased the structure of the outer conductor or shield [see g. in 4.6.1]; --- Added cable model naming method (see Appendix NA). Compared with GB/T 12269-1990, the main technical changes in this section are as follows. --- Revised the contents of "Model, Term Explanation and Definition" (see Appendix NA, Chapter 3 of the.1990 edition); ---Modified the contents of the "cable structure" (see Chapter 4, Chapter 5 of the.1990 edition). This part uses the translation method equivalent to IEC 61196-1.2005 "Coaxial Communication Cables Part 1. General Specifications, Definitions and Claim". This section has made the following editorial changes. --- Added informative Appendix NA to provide guidance for model naming of domestic products; --- Removed the duplicate b) in 6.3. The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows. GB/T 2951.11-2008 General Test Methods for Insulating and Sheathing Materials for Cables and Cables - Part 11. General Test Method Mechanical properties test for thickness and dimensions measurement (IEC 60811-1-1.2001, IDT) GB/T 2951.41-2008 General Test Methods for Insulating and Sheathing Materials for Cables and Cables - Part 41. Polyethylene and Poly Specific test methods for propylene mixtures - Environmental stress cracking test - Melt index measurement method - Direct combustion method Carbon black and/or mineral filler content in olefins, thermogravimetric analysis (TGA), carbon black content, microscopic evaluation of polyethylene Medium carbon black dispersion (IEC 60811-4-1..2004, IDT) Please note that some elements of this standard may involve patents. The issuing organization of this standard does not assume responsibility for identifying these patents. This part was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part is under the jurisdiction of the National High-Tech Cable and Connector Standardization Technical Committee for Electronic Equipment (SAC/TC190). This section was drafted. The 23rd Research Institute of China Electronics Technology Group Corporation. The main drafters of this section. Zhang Jianping, Wu Xifei, Wu Zhengping. The previous versions of this section partially replace the standard are. ---GB/T 17737.1-1999, GB/T 17737.1-2000, GB/T 12269-1990. Coaxial communication cables - Part 1. General specification General rules, definitions and requirements1 ScopeThis part of GB/T 17737 specifies the general rules, definitions and requirements for the design and test methods of coaxial communication cables. This section applies to coaxial communication cables used in radio communication equipment and electronic devices using similar technologies.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2421.1-2008 Overview and guidelines for environmental testing of electrical and electronic products (IEC 60068-1.1988, IDT) GB/T 2951.12-2008 - General test methods for insulating and sheathing materials - Part 12. General test methods Thermal aging test method (IEC 60811-1-2. 1985, IDT) GB/T 17650.1-1998 Test methods for gases emitted from burning of cables or cables - Part 1 Determination of total amount (IEC 60754-1..1994, IDT) GB/T 17650.2-1998 Test methods for gases released from burning by cables or cables - Part 2. Measurements pH and conductivity to determine the acidity of gases (IEC 60754-2.1991, IDT) GB/T 18380 (all parts) Burning test of cables and cables under flame conditions [IEC 60332 (alparts)] IEC 60028. 1925 International Standard of Resistance for Copper (International Standard of Resistance for Copper) IEC 60068-2-20.1979 Amendment 2 Environmental Test Part 2. Test Test T. Soldering (Environmental testing-Part 2.Tests-TestT.Soldering) Tests for cables and cables of cables and cables - Part 11. General test methods for thickness and Dimensional measurement mechanical performance test (Insulatingandsheathingmaterialsofelectricandopticalcables-Com- montestmethods-Part 1-1. Methodsforgeneralapplication-Measurementofthicknessandoveral dimensions-Testsfordeterminingthemechanicalproperties) Cables and cables for electrical cables and cables - General test methods - Part 41. Polyethylene and polypropylene mixes Specific test methods - Environmental stress cracking test - Melt index measurement method Direct combustion method for the measurement of carbon black and/or minerals in polyethylene Determination of carbon black content by thermogravimetric analysis (TGA) by thermogravimetric analysis (TGA). Evaluation of carbon black dispersion in polyethylene (Insulatingand sheathingmaterialsofelectricandopticalcables-Commontestmethods-Part 4-1.Methodsspecific topolyethyleneandpolypropylenecompounds-Resistancetoenvironmentalstresscracking-Meas- urementofthemeltflowindex-Carbonblackand/ormineralfilercontentmeasurementinpolyethy- lenebydirectcombustion-Measurementofcarbonblackcontentbythermogravimetricanalysis (TGA)-Assessmentofcarbonblackdispersioninpolyethyleneusingamicroscope) IEC 61196-1 (alparts) coaxial communication cable (Coaxialcommunicationcables) IEC 62153 (alparts) Metallic Communication Cable Test Method (Metaliccommunicationcabletestmethods)3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Media type dielectrictypes 3.1.1 Air dielectric cable airspaceddielectriccables An air dielectric cable is an insulating gasket that is placed on the inner conductor at regular intervals or a belt that is spirally fixed to the inner conductor. And/or the outside of the rope, all other media are air cables. This type of cable is characterized by the inner conductor to the outer conductor between the insulating spacers. It may not pass through the solid plastic dielectric layer. 3.1.2 Semi-air media cable semi-airspaceddielectriccables A semi-air dielectric cable is a gasket or other plastic structure in which the medium is a foamed polymer or insulating tube that holds the conductor in its center. Plastic-air structure cable. This type of cable is characterized by at least one layer of solid plastic medium passing from the inner conductor to the outer conductor. 3.1.3 Solid media cable soliddielectriccables A solid dielectric cable is a cable in which the space between the inner conductor and the outer conductor is completely filled with a solid plastic medium. The medium can be uniform It can also be combined. The latter consists of two or more materials of different nature concentrically combined. 3.2 Braided braiding The variables used in the weaving formula are shown in Table 1. Table 1 Variables of the weaving formula Variable description d braided single wire diameter or braid thickness The average diameter of the Dm braid, ie the outer diameter of the medium is 2.25d L weave pitch N number of single wires per ingot For tape weaving, W is the tape width; For round wire weaving, W is N × d m total number of spindles 3.2.1 Braided angle braidedangle The braid angle β refers to the angle between the longitudinal axis of the cable and the tangent of the spiral wound around the braided wire (strand). ==arctan πDm 3.2.2 Weaving coefficient layfactor KL The weaving coefficient refers to the ratio of the length of the braid of the braided wire (strand) to the length of the braided cable. KL= 1 π2 Dmæè = 1cosβ 3.2.3 Fill factor factoringfactor The fill factor is defined as. q= mW2πDm 1 π2 Dmæè Can also be expressed as. q= mW2Lsinβ 3.2.4 Weaving density coveragefactor KC The relationship between the weave density and the fill factor is. KC=2q-q2 3.3 Media eccentricityofdielectric The eccentricity of the medium refers to the amount of change in the thickness of the insulation on the cable cross section (Dx), defined as the thickness of the two insulations on the cross-sectional diameter (Dx). The ratio of the maximum difference (Tmax-Tmin) to the outer diameter of the insulation (Dx), expressed as a percentage. E= Tmax-TminD ×100% 3.4 Ellipticality of media or cable ovalityofdielectricorcable The ellipticity of the medium or cable means that the ellipticity of the insulation or cable cross section is defined as the maximum difference between the two orthogonal diameters (Dmax- Dmin) is the ratio of its two diameter averages (Dmax Dmin)/2, expressed as a percentage. O= 2 (Dmax-Dmin) Dmax D Êê Úú Min ×100% 3.5 Impedance impedance 3.5.1 Characteristic impedance characteristicimpedance The characteristic impedance refers to the ratio of the traveling wave voltage and the traveling wave current traveling in the same direction of the transmission line. 3.5.2 Average characteristic impedance meancharacteristicimpedance Z∞ The average characteristic impedance is the asymptotic value reached by the characteristic impedance above a sufficiently high frequency (approximately equal to.200 MHz), which is a positive Real number. Note. At sufficiently low frequencies (approximately equal to 10 MHz), the characteristic impedance can be described by a complex number with a negative phase angle. 3.5.3 Impedance non-uniformity 3.5.3.1 Random impedance non-uniformity randomimpedanceirregularities Random impedance non-uniformity refers to impedance non-uniformity with non-reproducing characteristics or no correlation law found. Note. These inhomogeneities have significant statistical characteristics in conventionally manufactured cables. This non-uniformity affects the broadband characteristics of the transmission. 3.5.3.2 Periodic impedance non-uniformity periodicimpedanceirregularities The periodic impedance non-uniformity is the impedance non-uniformity caused by the distance physical deformation of the cable caused by manufacturing or cable structure deviation. Note. Even if the non-uniformity is small, the transmission performance will be affected at discrete frequency points or the input noise will be significantly increased in digital signal detection. 3.5.3.3 Local impedance non-uniformity localimpedanceirregularities Local impedance non-uniformity refers to the difference in impedance between the two ends of the cable (input) that are connected together, which may be due to defects at the joint or The cable is partially damaged and increases. 3.6 Speed ratio (relative propagation speed) velocityratio(relativepropagationvelocity) The speed ratio is the ratio of the speed of a signal in a cable to its speed in free space. 3.7 Rated power The rated power of the cable is that it can work continuously at any specified frequency and ambient temperature without exceeding the maximum allowable operating voltage. The input power does not exceed the maximum allowable temperature of the inner conductor. Under these conditions, the cable should be terminated with a load that is consistent with its characteristic impedance. 3.8 Shielding efficiency screeningeffectiveness 3.8.1 Transfer impedance transferimpedance ZT Transfer impedance refers to a longitudinal cable (U2) induced by a short cable with a short electrical length in the outer loop (environment) and the inner loop (electrical The ratio of current (I1) in the cable), or vice versa. It is related to the unit length. ZT= U2I1×L In the formula. L --- coupling length. 3.8.2 Capacitive coupling capacitivecoupling YC Capacitive coupling is the current (I1) caused by capacitive coupling in the inner loop of a uniform cable with a short electrical length and the voltage in the outer loop. The ratio of (U2), which is related to the unit length. YC= I1U2×L=j ωCT In the formula. CT --- through the capacitor; L --- coupling length. 3.8.3 Shielding attenuation screeningattenuation As Shielding attenuation is a suitable criterion for the shielding efficiency of cables with longer electrical lengths, which is the maximum peak value of power Pfeed and radiation fed into the cable. The logarithm of the power Prad,max ratio. As=10lg PfeedPrad,max For cables with longer electrical lengths, the shielding attenuation is proportional to the length and frequency of the cable shield. Frequency independent. 3.9 Self-supporting cable messengeredcable Self-supporting cables are cables (usually outdoor cables) with separate support elements. 3.10 Overhead cable aerialcable An overhead cable is a cable (usually an outdoor cable) that is mounted on a pole or other cable support member. 3.11 Suspension line messenger Suspension lines are cable support elements of metallic or other suitable materials.4 Materials and cable construction4.1 General Unless otherwise specified, all physical measurements shall be made under the standard atmospheric conditions of the test specified in Clause 5 of GB/T 2421.1-2008. get on. 4.2 Visual inspection A visual inspection should be performed to ensure that there are no visible defects on the cable. Apply normal vision or correct vision when performing an examination, but not magnifier. 4.3 Dimensional measurement The measurement of thickness and diameter shall be carried out in accordance with the provisions of Chapter 8 of IEC 60811-1-1. 4.4 Cable Structure - Inner Conductor 4.4.1 Conductor material For solid copper conductors, the conductor shall consist of annealed or hard-drawn copper wire with uniform quality and no defects. The characteristics of copper should be consistent with IEC 60028. 1925. As an alternative material, the conductor can also be a copper clad steel wire. The copper coating shall be continuous and adhered to the steel conductor; the section shall be circular, For the copper-clad steel wire with 21%, 30% and 40% nominal conductivity grades, the maximum resistance should not exceed IEC 60028.1925 The specified copper conductors are 4.8, 3.5 and 2.8 times the specified value. Elongation at break when tested in accordance with the test method specified in IEC 61196-1-308 Should be no less than 1%. For 21%, 30% and 40% nominal conductivity grades of copper clad steel, the minimum tensile strength shall be 827N/ Mm2, 792N/mm2 and 760N/mm2. The conductor can also be a copper clad aluminum wire. The copper cladding shall be continuous and adhered to the aluminum conductor and its maximum resistance shall not exceed IEC 60028. The copper conductor specified in 1925 is 1.8 times the specified value. Unless otherwise specified in the appropriate sub-specification or detailed specification, when in accordance with IEC 61196-1- Test method specified in 308 When the tensile test is carried out, the elongation at break shall be not less than 1%. Other conductor materials and metal cladding (where applicable) shall be specified in the appropriate sectional or detail specification. 4.4.2 Inner conductor metal coating The metal cladding of the conductor (where applicable) shall be specified in the appropriate sub-specification or detailed specification. 4.4.3 Thickness of conductor cladding The thickness of the conductor cladding (if applicable) shall be specified in the corresponding sub-specification or detailed specification. 4.4.4 Structure of inner conductor The structure and materials of the inner conductor shall be specified in the corresponding sub-specifications or detailed specifications. When the inner conductor is a single wire or tubular structure, there should be no joint after the final drawing. The single-wire joint of the inner conductor of the stranded copper wire shall be cold-welded, brazed or silver-welded with non-acid flux. The diameter of the single wire after welding shall not increase, and there is no Raised. The distance between each single wire joint and any other single wire joint shall not be less than 0.3m. Samples of copper single wire or copper tubing removed from the finished cable should have no visible discoloration. If the conductor is tinned, it should be free of flux and Cleaning things. 4.4.5 Solderability The weldability of the solderable conductor (when applicable) shall be checked in accordance with the solder bath method specified in 4.6 of IEC 60068-2-20. Inactive help should be used Flux. 4.5 Media 4.5.1 Type The type of media required for each cable shall be specified in the appropriate cable sub-specification or detailed specification. Media outer diameter, ellipticity and eccentricity should Given in the corresponding sub-specification or detailed specification. 4.5.2 Tensile strength and elongation at break The tensile strength and elongation at break of solid dielectric materials shall be in accordance with IEC 60811 when required in the respective sub-specifications or detailed specifications. Test specified in 1-1. When required in the corresponding sub-specification or detailed specification, thermal aging shall be tested in accordance with the provisions of GB/T 2951.12. 4.5.3 Eccentricity The eccentricity of the media should be determined by measuring the cross section of the cable media. Measurements shall be made in accordance with the test methods specified in IEC 61196-1-302. The maximum value of the eccentricity shall not exceed the value specified in the corresponding sub-specification or detailed specification. 4.5.4 Ellipticity The ellipticity of the medium should be determined by measuring the cross section of the cable medium. It shall be determined in accordance with the test methods specified in IEC 61196-1-301. The maximum value of the ellipticity shall not exceed the value specified in the corresponding sub-specification or detailed specification. 4.6 outer conductor or shield 4.6.1 General The structure and material of the outer conductor or shield shall be specified in the corresponding sectional or detail specification. The outer conductor or shield can be one of the following types or any combination thereof. a) Bare or plated wire or braided layer. The joints of the braided wire or belt shall be welded, screwed or braided, and the braided layer shall not be allowed. Body continues. The braid should be uniform, and the braid angle and fill factor should be specified in the corresponding sub-specifications or detailed specifications. b) The bare or covered wire or strip is wound around the core into a continuous, closed shield with or without metal tie. c) A suitable tube of electrically conductive material (ie extruded, welded, smooth or wrinkled). d) A layer of longitudinally wrapped metal or metallized film, the overlap ratio of which is specified in the corresponding sub-specification or detailed specification. e) A combination of the above, plus a lossy conductive layer or a magnetic intermediate layer. f) A combination of two layers of metallized tape or film with an aluminum wire, copper wire or tinned copper wire in contact with the metal layer. Two-layer metal The tape or film is wrapped longitudinally or wrapped around the medium of the coaxial cable. g) A layer of metal or metallized film wrapped longitudinally around the media and covered with a layer of braid. An additional layer of overlapping width can be used To the formed metal or metallized film (and covered to weave). 4.6.2 Intermediate jacket/intermediate layer When an intermediate layer is required between the outer conductor and the shield, the intermediate jacket shall be made of plastic and conform to the corresponding sub-specification or detailed specification. Prescribed requirements. The structure of the intermediate jacket shall be specified in the corresponding sub-specification or detailed specification. The intermediate sheath should be free of pinholes, cracks, air bubbles and other defects, and its surface should be uniform. 4.6.3 Semi-conductive layer Where applicable, the semiconducting layer shall be specified in the appropriate sub-specification or detailed specification. 4.7 Jacket or sheath 4.7.1 General The outer sheath of the cable shall be made of plastic, unless otherwise specified in the appropriate sectional or detail specification. Where applicable, the carbon black content shall be specified in the appropriate sub-specification or detailed specification and tested in accordance with IEC 60811-4-1. When specified, the UV stability of the sheath shall be tested in accordance with IEC 61196-1-301. When specified in the corresponding sectional specification or detailed specification, the tensile strength and elongation at break of the sheath material shall be in accordance with IEC 60811-1-1. Prescribe the test. When specified in the corresponding sub-specification or detailed specification, heat aging shall be carried out in accordance with GB/T 2951.12. 4.7.2 Jacket thickness and outer diameter The thickness and outer diameter of the sheath shall be as specified in the corresponding sectional or detailed specifications. The thickness and outer diameter of the sheath shall be measured in accordance with the provisions of Chapter 8 of IEC 60811-1-1. 4.7.3 Moisture barrier If applicable, the moisture barrier shall be as specified in the appropriate sub-specification or detailed specification. 4.7.4 Ellipticity Ellipticity should be determined by measuring the cross section of the cable sample. The ellipticity shall be determined in accordance with the measurement method specified in IEC 61196-1-301. The ellipticity shall not exceed the values specified in the corresponding sub-specifications or detailed specifications. 4.7.5 Flammability Unless otherwise specified, the flammability shall be determined in accordance with the applicable provisions of the GB/T 18380 series of standards. 4.7.6 Corrosive products during combustion When specified, the amount of halogen gas released during the combustion process shall be determined in accordance with the provisions of GB/T 17650.1-1998. When specified, the acidity of the gas determined by measuring the pH and conductivity shall be in accordance with the provisions of GB/T 17650.2-1998. 4.8 Armored When applicable, cable armoring shall be specified in the appropriate sub-specification or detailed specification. The specific structure and dimensions of the armor shall be specified for various conditions depending on the hazard that can be expected. Table 2 gives the typical application Example structure. Table 2 Anti-hazard armor layer Typical structure example for which the hazard applies Worn or rough wire or aluminum alloy wire weaving Tensile stress non-metallic reinforcement, round wire or flat steel wire wrapped Compressive stress two-layer steel strip wrapping Rodent attack with a layer of steel tape wrapped Termite attack/ship's impact on a thin layer of brass tape wrapped Replace all hazard chrome-plated corrugated steel except tensile stress 4.9 suspension line The type of suspension should be specified in the appropriate sub-specification or detailed specification.5 Standard ratings and characteristicsThe ratings and characteristics applicable to each cable shall be specified in the appropriate sub-specification or detailed specification. 6 logos, signs and labels 6.1 Identification The identification of the cable shall be as specified in 6.1.1 or as specified in the corresponding sub-specification or detailed specification. 6.1.1 Cable sign When required, the cable marking shall comply with the manufacturer's cable markings as specified in 6.2 and/or sub-specifications or detailed specifications. The wear resistance of the cable marking shall be in accordance with the relevant sectional specifications or detailed specifications. 6.2 IEC mark When the IEC cable type designation is specified in the corresponding sub-specification or detailed specification, the type number shall include the following elements. a) a number in Ω giving the nominal characteristic impedance of the cable, eg "75"; b) a number in mm corresponding to the nominal diameter measured on the medium; c) The serial number of the IEC specification, for example "IEC 61196-5-X". Example. 7512.4 IEC 61196-1-2. 6.3 Label Unless otherwise specified in the appropriate sectional specification or detailed specification, the outer surface of the label or the side panel of the wire disc is obtained on each finished cable. It should have a durable print code and provide the necessary information below. a) the cable type named by the manufacturer or supplier; b) the length of the cable (unit. m); c) The name of the manufacturer or supplier.7 Test and test methodsTests and their requirements shall be specified in the appropriate sub-specifications or detailed specifications. Where applicable, and if not otherwise specified in this section or in the corresponding sub-specification or detailed specification, the test method shall be from IEC 61196- The 1-××× series (IEC 61196-1-××× is selected for different parts of the development) or selected from the IEC 62153 series.8 qualityWhen specified in a sub-specification or detailed specification, the quality procedure shall comply with the requirements of IEC 61196-1-1.9 Delivery and storageCables shall be delivered in discs, in loops or in boxes and shall be suitably protected. Both ends of the finished cable should be properly sealed to prevent moisture from entering. The seal shall be carried out immediately after the inspection and acceptance test. Appendix NA (informative appendix) Cable model naming method NA.1 model composition The model number of the cable consists of classification code, insulation code, sheath code, derivative characteristic code, average characteristic impedance, insulation outer diameter and structure serial number. composition. The outer diameter of the insulation is rounded to the nearest whole number according to its nominal value or equivalent value. The model structure is as follows. NA.2 Meaning of each component of the cable model The composition and significance of the cable model are shown in Table NA.1. Book book ', "/ '0 ', "/ '' 9/ ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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