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Combined cables intended for the transmission of television signals in video surveillance systems with simultaneous connection of power and/or transmit control signals.

For external cabling.

It consists of a radio frequency cable and power supply wires, united under a single sheath.

RF cable:

  • with solid copper inner conductor
  • with insulation of foamed polyethylene
  • with the external conductor in the form of a braid of copper wire

Cores power and a common cable sheath:

  • power supply cores of 0.50 sq. mm cross-section
  • in the common sheath of light-stabilized polyethylene (outdoor installation)

Features:

  • Brand radiocable - RK 75-3-32
  • Inner conductor - 1x0. 60 mm
  • Insulation diameter - 2.7 mm
  • The attenuation coefficient at f=6 MHz and 2.9 dB/100 m
  • Outer cable diameter - 9 mm
  • Cable weight - 58 g/m
  • Outer sheath material - light-stabilized polyethylene
  • Electrical resistance of conductors to direct current at 20 ° С and a length of 1 km - not more than 40.5 Ohm / km

The electrical characteristics of radiocable:

  • Impedance - 75 Ohm
  • Electric cable capacitance - 56 pF/m
  • Coefficient of shortening of the wave length of 1.22
  • The coupling resistance is 110 mOhm/m
  • The speed of propagation of the wavelength - 82%

Attenuation coefficient:

Frequency, MHz Coefficient attenuation, dB/100 m
6 2,7
10 3,5
50 7,9
100 11,4
200 16,3
470 25,5
862 35,3
1000 38,4
2150 58,7

Operating conditions - from minus 60° to plus 70°C.

Resistant to high humidity 98% at temperatures up to 35°C, under conditions of installation bending or minus 15°C.

Resistant to sunlight, frost.

Resistant to bends (not less than 10 bends at an angle of +/-90° if the radius of the bend, equal to ten maximal external diameter of the cable).

The service life of the cables is 25 years.

Cables - characteristics:

Cable sort
Combo