1.Underground Trunk cable
2.75ohm cable
3.QR540 Solid trunk cable
4.Ground communication
1) CATV Underground Trunk Coaxial Cable QR540 Basic Construction
- Center Conductor: 3.15mm Solid Copper/Copper Clad Aluminum
- Dielectric: 13.03mm Foam PE
- Outer Conductor: 0.25-0.6mm Aluminum Tube
- Jacket: 15.49mm PVC / PE
- Jacket Thick.: 0.89mm
- Jelly/APD Per Customer' Special Requirement
2) CATV Underground Trunk Coaxial Cable QR540 Basic Characteristics
- Electrical performance
- Capacitance: 15.3±0.1 pF/ft,(50±3 nF/km)
- Impedance: 75±3 ohms
- Velocity of Propagation: 87% (Nominal)
- Maximum DC Loop Resistanc1.72 ohms/1000 ft (5.64 ohms/km)
- Attenuation:@68 F(20°C)
3) CATV Underground Trunk Coaxial Cable QR540 Parameter
Frequency(MHz) | dB/100ft.(max.) | dB/100m(max.) |
5 | 0.14 | 0.46 |
55 | 0.47 | 1.54 |
211 | 0.95 | 3.12 |
450 | 1.40 | 4.59 |
550 | 1.56 | 5.12 |
750 | 1.85 | 6.07 |
865 | 2.00 | 6.56 |
1000 | 2.17 | 7.12 |
4) CATV Underground Trunk Coaxial Cable QR540 Type
1. 3.15mm ± 0.03 CCA + Foamed PE + 13.03mm ± 0.25 Welded AL Strip+ 15.78mm ± 0.25 PE
3. 3.15mm ± 0.03 CCA + Foamed PE + 13.03mm ± 0.25 Welded AL Strip + Flooding Compound + 15.78mm ± 0.25 PE
3. 3.15mm ± 0.03 CCA + Foamed PE + 13.03mm ± 0.25 Welded AL Strip + Flooding Compound + 15.78mm ± 0.25 PE
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