IBM 4247 Model 003, User Manual

Page: 357 / 392

Conductor AWG wire size 20
Stranding 7 x 28
Material Copper
Coating Tin (1 conductor only)
Resistance 11 ohms maximum per 305 m (1000 ft)
Insulation Material Polyethylene
Outside diameter 6.1 mm (0.24 in.) nominal
Shield Material Tinned copper
Type Braid, 34 AWG, 7 ends/24 carriers,
9.7 ± 10% picks/25.4 mm (1 in.)
Coverage 95% minimum
Resistance 3 ohms maximum per 305 m (1000 ft)
Jacket Material Vinyl
Color Black
Average
single-wall
thickness 0.76 mm (0.029 in.)
Outside diameter 8.25 mm (0.325 in.) nominal
Rating Dielectric
strength 4500 V dc for 3 seconds at 28°C (82°F)
Capacitance 53.1 pF/m (16.2 pF/ft) maximum
Impedance, characteristic 111 ± 5% ohms at 0.5 MHz
107 ± 5% ohms at 1 MHz
105 ± 5% ohms at 2 MHz and above
Attenuation @ 100 MHz 4.5 dB/30.5 m (100 ft) maximum at 25 °C (77°F)
4.7 dB/30.5 m (100 ft) maximum at 80°C (176°F)
Velocity of propagation 66% ± 5%
Operating environment -40°C to 80°C (-40°F to 176°F)
10% to 90% relative humidity
Twinax Cable Specifications for Teflon Cable
The following are bulk cable specifications for twinax cables with Teflon covering:
Core Insulation (Teflon)
Conductor Insulation
Conductors (2)
Shield
Teflon Jacket
Appendix B. Cable Specifications and Assembly of Cables
347