RLK78-50JFLA
7/8" RADIAFLEX® RLK Cable, A-series

Rev : P1 | Rev date : 08 Mar 2017

RADIAFLEX® functions as a distributed antenna to provide communications in tunnels, mines and large building complexes and is the solution for any application in confined areas.
Slots in the copper outer conductor allow a controlled portion of the internal RF energy to be radiated into the surrounding environment. Conversely, a signal transmitted near the cable will couple into the slots and be carried along the cable length.
RADIAFLEX® is used for both one-way and two-way communication systems and because of its broadband capability, a single radiating cable can handle multiple communication systems simultaneously.
This RADIAFLEX® radiating cable utilize a low-loss cellular polyethylene foam dielectric and a smooth copper outer conductor which offers a superior electrical performance together with good bending properties.

FEATURES / BENEFITS

RLK cable, A-series

Technical features

General Specifications
Size		7/8

Electrical Specifications
Max. Operating Frequency	MHz	980
Cable Type		RLK
Impedance	Ohm	50 +/- 2
Velocity, percent	%	89
Capacitance	pF/m (pF/ft)	75 (22.9)
Inductance, uH/m (uH/ft)	µH/m (µH/ft)	0.188 (0.057)
DC-resistance inner conductor, ohm/km (ohm/1000ft)	Ω/km (Ω/1000ft)	1.74 (0.53)
DC-resistance outer conductor, ohm/km (ohm/1000ft)	Ω/km (Ω/1000ft)	2.52 (0.77)
Stop bands	MHz	300-375, 650-685
Frequency Selection	MHz	600, 900

Mechanical Specifications
Jacket		JFL
Jacket Description		Halogen free, non corrosive, flame and fire retardant, low smoke, polyolefin + flame barrier tape above outer conductor for lowest cable loss
Slot Design		Groups of vertical slots at short intervals
Inner Conductor Material		Copper Tube
Outer Conductor Material		Overlapping Copper Strip
Diameter Inner Conductor	mm (in)	9.3 (0.37)
Diameter Outer Conductor	mm (in)	23.8 (0.94)
Diameter over Jacket Nominal	mm (in)	28.5 (1.12)
Minimum Bending Radius, Single Bend	mm (in)	350 (13.8)
Cable Weight	kg/m (lb/ft)	0.55 (0.37)
Tensile Force	N (lb)	2300 (507)
Indication of Slot Alignment		Bulge atop slots
Recommended / Maximum Clamp Spacing	m (ft)	0.9 (3)
Minimum Distance to Wall	mm (in)	80 (3.15)

Testing and Environmental
Jacket Testing Methods		Test methods for fire behaviour of cable : IEC 60754-1/-2 smoke emission: halogen free, non corrosive IEC 61034 low smoke IEC 60332-1 flame retardant IEC 60332-3-24 fire retardant UL1666, ASTM E 662, NES711 and NES713 NFPA130 (ed. 2014) Ch.12 (NFPA70 ) via UL-1685/FT4/IEEE1202

Temperature Specifications
Storage Temperature	°C(°F)	-70 to 85 (-94 to 185 )
Installation Temperature	°C(°F)	-25 to 60 (-13 to 140 )
Operation Temperature	°C(°F)	-40 to 85 (-40 to 185 )

External Document Links

Notes

Coupling loss as well as longitudinal attenuation of RADIAFLEX® cables are measured by the free space method according to IEC 61196-4.
Coupling loss values are measured with a radial (below 330 MHz) or parallel (above 330 MHz) orientated dipole antenna.
The coupling loss values given in brackets are average values of all three spatial orientations (radial, parallel and orthogonal) of dipole antenna.
Coupling loss values are given with a tolerance of +10 dB and longitudinal loss values with a tolerance of +5%. Note: Measured values below nominal are better. They are not limited by any tolerance-range.
In case of a conflict of operational and stop band, please contact RFS Technologies for further assistance.
As with any radiating cable, the performance in building or tunnel environments may deviate from figures based on free space method.

RLK78-50JFLA7/8" RADIAFLEX® RLK Cable, A-series