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LMR 240 Cable Assemblies |
LMR(R)-240
Flexible Low Loss Communications Coax
Ideal for:
Jumper Assemblies in Wireless Communications Systems
Short Antenna Feeder runs (e.g. WLL, GPS, LMR,Mobile Antennas)
Any application (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax,
SCADA, Mobile Antennas) requiring an easily routed,low loss RF cable
Low Loss is another hallmark feature of LMR-240.
Size for size LMR has the lowest loss of any flexible cable
and comparable loss to semirigid hard-line cables.
RF Shielding is 50 dB greater than typical single
shielded coax (40 dB). The multi-ply bonded foil outer
conductor is rated conservatively at > 90 dB (i.e. >180
dB between two adjacent cables).
Weatherability: LMR-240 cables designed for outdoor
exposure incorporate the best materials for UV resistance
and have life expectancy in excess of 20 years.
Connectors: A wide variety of connectors are available
for LMR-240 cable, including all common interface
types, reverse polarity, and a choice of solder or nonsolder
center pins. Most LMR connectors employ crimp
outer attachment using standard hex crimp sizes.
Cable Assemblies: All LMR-240 cable types are
available as pre-terminated cable assemblies.
Description Material In. (mm)
Inner Conductor: Solid Bare Copper
Inner Conductor Diameter: 0.056in (1.42mm)
Dielectric: Foam PE
Dielectric Diameter: 0.150in (3.81mm)
Outer Shield: Aluminum Tape
Outer Shield Diameter: 0.155in (3.94mm)
Overall Braid: Tinned Copper
Overall Braid Diameter: 0.178in (4.52mm)
Over All Cable Diamter: 0.240in (6.10mm)
Environmental Specifications
Installation Temperature Range: F-40/+185 [C-40/+85]
Storage Temperature Range: F-94/+185 [C-70/+85]
Operating Temperature Range: F-40/+185 [C-40/+85] |
Electrical Specifications
Velocity of Propagation: 84%
Dielectric Constant: 1.42
Time Delay: 1.21nS/ft (3.97nS/m)
Impedance: 50ohms
Capacitance: 24.2pF/ft (79.4pF/m)
Inductance: 0.060uH/ft (0.20uH/m)
Shielding Effectiveness: >90dB
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DC Resistance
Inner Conductor: 3.2ohms/1000ft (10.5ohms/km)
Outer Conductor: 3.89ohms/1000ft (12.8ohms/km)
Voltage Withstand: 1500Volts DC
Jacket Spark: 5000Volts RMS
Peak Power: 5.6 kW
Cuttoff Frequency: 31Ghz
| Frequency (MHz) | 30 | 50 | 150 | 220 | 450 | 900 | 1500 | 1800 | 2000 | 2500 | 5800 |
| Attenuation dB/100 ft | 1.3 | 1.7 | 3.0 | 3.7 | 5.3 | 7.6 | 9.9 | 10.9 | 11.5 | 12.9 | 20.4 |
| Attenuation dB/100 m | 4.4 | 5.7 | 9.9 | 12.0 | 17.3 | 24.8 | 32.4 | 35.6 | 37.7 | 42.4 | 66.8 |
| Avg. Power kW | 1.49 | 1.15 | 0.66 | 0.54 | 0.38 | 0.26 | 0.20 | 0.18 | 0.17 | 0.15 | 0.10 |