Appendix
LD900 Installation and Oper ations M anual
84
8.2.2 Times LMR 240 Coaxial cable
8.2.2.1
Electrical Specifications
Performance Property
Units
US
(metric)
Attenuation @1.5GHz:
30.77m (100f t.) 9.9dB
100m 32.4dB
Velocity of propagation %
84
Dielectric constant
N/A
1.42
Time delay
nS/f t (nS/m)
1.21
(3.97)
Impedance
50
Capacitance
pF/f t (pF/m)
24.2
(79.4)
Inductance
uH/f t (uH/m)
0.060
(0.20)
Shielding effectiveness dB
>90
DC resistance
Inner conductor
Outer conductor
/1000 f t (/km)
/1000 f t (/km)
3.2
3.89
(10.5)
(12.8)
Voltage withstand
VDC
1500
Jacket spark
Vrms
5000
Peak power
kW
5.6
8.2.2.2
Mechanical Specifications
Performance Property
Units
US
(metric)
Bend radius, installation in. (mm)
0.75
(19.1)
Bend radius, repeated
in. (mm)
2.5
(63.5)
Bending moment
f t-lb (N-m)
0.25
(0.34)
Weight
lb/f t (kg/m)
0.034
(0.05)
Tensile strength
lb (kg)
80
(36.3)
Flat plate crush
lb/in. (kg/mm)
20
(0.36)
8.2.2.3
Environmental Specifications
Performance Property
°F
°C
Installation temperature range
-40 to +185
-40 to +85
Storage temperature range
-94 to +185
-70 to +85
Operating temperature range
-40 to +185
-40 to +85
