ANSI SCTE 244 pdf free download

ANSI SCTE 244 pdf free download.Specification for Braided 75Ω, Micro-Series Quad Shield Coaxial Cable for Connectivity and Dense CCAP/Edge QAM Applications.
6. Center Conductor 6.1. Center conductor dimension shall be 0.0118士1% inches (0.30 mm士1%). 6.2. Solid-Copper, Silver Plated Copper, Silver-Plated Copper Clad Steel or Copper-Clad Steel shall be specified. Copper based center conductors shall be of soft drawn temper. 6.3. Minimum break strength (MBS) of the Solid-Copper center conductor shall be determined by multiplying the minimum cross sectional area by 30,000 psi (207 MPa). MBS for 0.01 18” Solid-Copper conductor equals 3.28 lbf (14.6 N). 6.4. Minimum break strength (MBS) of the Silver-Plated, Copper-Clad Steel center conductor shall be determined by multiplying the minimum cross sectional area by 95,000 psi (655 MPa). MBS for 0.01 18″ Silver-Plated, Copper Clad Steel conductor equals 10.4 Ibf (46.2 N). 6.5. The center conductor electrical conductivity shall be 96 percent IACS minimum, for copper based conductors, and shall be 40 percent IACS minimum, for copper-clad steel conductors. 6.6. Maximum DC resistance shall be measured per ANSI/SCTE 44, and shall not exceed 79.6 ohms/ 1000 feet (261.2 ohms/km) for solid-copper center conductors. Maximum DC resistance shall not exceed 190 ohms/1000 feet ( 623.4 ohms/km) for, copper-clad steel conductors. All values are at 68°F (20°C) reference. 7. Dielectric 7.1. The dielectric shall be a cross-linked, gas-injected foamed Polyethylene (PE), or Polypropylene (PP), and shall meet the requirements of a 105°C operating temperature. 7.2. The dielectric shall contain a stabilization package to meet the requirements of section 10.1.3 Thermal Oxidative Stability (TOS).7.3. Unless otherwise specified, polyethylene materials for the dielectric shall meet all applicable requirements of ASTM D 1248 and requirements of this document. 7.4. A precoat over the inner conductor is optional. 7.5. Nominal Dielectric Diameter – 0.056 inch (1.42 mm). 8. Shield Construction 8.1. Quadshield 8.1.1. Inner Laminated Shielding Tape (LST) 8.1.1.1. The first outer conductor (LST) shall be an aluminum-polyester foil tape (AP) bonded to the dielectric and to itself at the tape overlap. The minimum Aluminum thickness shall be 9 microns 8.1.1.2. The LST shall be applied longitudinally or helically to the dielectric and shall be free of twists or discontinuities over the entire length.8.1.1.3. On the finished product, the LST shall overlap the dielectric circumference by a minimum of 18 percent, and 35% maximum, when applied longitudinally. 8.1.1.4. The average core diameter shall be determined by measuring the diameter over the LST in the finished product as described in ANSI/SCTE 31. Average core diameter – 0.064士0.002 inches(1 .62士0.05 mm) 8.1.1.5. Core ovality shall be determined by subtracting the measured minimum diameter from the measured maximum diameter over the LST in the finished product. Core ovality maximum – 0.003 inches (0.076 mm) 8.1.2. Inner Braid Wires 8.1.2.1. The braiding wire shall be tin copper wire consisting of 38 AWG (0.004+0.0003 inches, 0. 10+0.007 mm.) 8.1.2.2. Minimum tensile strength for individual strands of tinned copper braid wire shall comply with ASTM B33 latest revision. 8.1.2.3. Braid coverage over the first outer conductor shall be a minimum of 89 percent. The braid coverage shall be determined by ANSISCTE 51. 8.1.3. Outer Laminated Shielding Tape (LST) 8.1.3.1. A LST shall be applied over the braid wires specified in section 8.1.2. 8.1.3.2. The LST shall be constructed of one, aluminum foil laminated to a strength member.8.1.3.3. The outer LST shall be applied longitudinally or helically over the second outer conductor. When applied longitudinally, an overlap of 18% minimum to 35% maximum and shall be free of twists and discontinuities over the entire length. 8.1.4. Outer Braid Wires 8.1.4.1. The braiding wire shall be tin copper wire consisting of 38 AWG (0.004+0.0003 inches, 0.10+0.007 mm). 8.1.4.2. The individual strands of tinned copper braid wire shall conform to ASTM B33 latest revision. 8.1.4.3. Braid coverage over the LST shall be sufficient to comply with screen attenuation requirements specified in section 10.2.5. Typical outer braid coverage is 90 percent.ANSI SCTE 244 pdf download.