Reference: 100
Unarmoured coaxial cable
26-01-09 AG
CX-BE
Cable Design
Bamboo 3 and Bamboo 6
Coaxial - Polyethylene sheath
Bamboo®
- example - not to scale -
Application
The coaxial cables are used in TV signal distribution networks and as antenna cable for terrestrial and satellite broadcast
systems. They are suitable for fixed installation but not for continuously moved applications.
Construction
Inner conductor
:
The inner conductor consists of a solid wire of commercially pure annealed copper
Dielectric
:
The discs and tube consists of polyethylene compound
Outer conductor
:
The outer conductor consists of a copper foil, applied longitudinally with an overlap
Outer sheath
:
The outer sheath consists of polyethylene compound (green)
Dimensions
Nominal diameter over ( mm )
Inner conductor
Dielectric
Outer conductor
Outer sheath
Bamboo 3
3.3
13.35
13.9
18.5
All sizes and values without tolerances are reference values
www.draka.com
Bamboo 6
1.7
6.95
7.25
10.5
Not to be reproduced or communicated without prior Draka agreement
page 1 of 3
Reference: 100
Unarmoured coaxial cable
26-01-09 AG
Electrical characteristics
Bamboo 3
Bamboo 6
Ohm
75 +/- 1,5
75 +/- 1,5
dB
= 50
= 46
Return loss
between 20 – 400 MHz
with possibly 3 peaks
dB
dB
= 28
= 26
= 26
= 24
Return losstussen
between 400 - 900 MHz
with possibly 3 peaks
dB
dB
= 22
= 19
= 20
= 17
Capacitance
pF/m
50
50
Velocity ratio
%
89
88
ohm/km
= 4,5
= 15
Isolation resistance
G.ohm.km
= 10
= 10
Max. attenuation at frequency:
230 MHz
900 MHz
dB/100 m
dB/100 m
3,0
6,4
5,6
11,3
0,002
0,002
dB
dB
dB
= 83
= 69
= 62
= 83
= 69
= 62
kVac
kVdc
= 2
= 10
= 2
= 10
Characteristic impedance
Impedance regularity
50 ns
D.C. resistance
- loop
Attenuation temp. coeff. per ºC
(for frequencies = 10 MHz)
Screening efficiency:
30 MHz
30 - 470 MHz
470 - 900 MHz
Dielctric strength
dielektric
( 120 s )
sheath
( 60 s )
Mechanical characteristics
Cable type
Cable weight (kg/km)
Pulling force (max in N)
Temperature range
Bending radius
Bamboo 3
335
2000
Transport, storage, operation
Installation
Repeated bending
Cable bend
Bamboo 6
110
600
- 40 to + 70
- 5 to + 50
Min. 20 x D
Min. 10 x D
°C
°C
D = outer cable diameter
All sizes and values without tolerances are reference values
www.draka.com
Not to be reproduced or communicated without prior Draka agreement
page 2 of 3
Reference: 100
Unarmoured coaxial cable
26-01-09 AG
Sheath marking
The outer sheath is printed with :
CAI [year] DRAKA COAX [type]
Opposite
CAI [year] DRAKA COAX [type] [length marking]
* [type] = DRIE or ZES
(three or six)
Testing and inspection
Electrical characteristics
( 1 out of 4 cable lengths )
Conductor resistance
Characteristic Impedance
Impedance regularity
Mechanical characteristics
Thickness of sheaths
Diameter of cable
Visual inspection of cable
Colour of sheath
Identification
The mechanical characteristics and the visual inspection shall be carried out with
a frequency of 1 out of 10 d rums, starting with the first drum. The first drum shall
always be checked when the quantity is less than 10 drums.
Test frequency
Certified test results are provided upon request.
If testing and inspection is required to be carried out by third parties,
such parties will be nominated and paid by the Purchaser.
Packing
Standard lengths
Length tolerance
Bamboo 3 : 700
m
Bamboo 6 : 1000
±5
%
To prevent ingress of moisture cable ends are sealed with shrinkable end caps
All sizes and values without tolerances are reference values
www.draka.com
Not to be reproduced or communicated without prior Draka agreement
page 3 of 3