Specifications

Thick-ethernet-cable networks CP143 H1 / TCP/IP manual
3-12 Rev. 00/07
Guidelines for the routing and installation of network components:
As a rule, a minimum distance of 1m is prescribed with respect to electrical equipment, cabling
and other components that could produce electromagnetic and electrostatic fields. This includes
parallel runs of power or high-tension cables, circuit breakers etc.
The ISO-specifications allow for a maximum field strength of 2 V/m at frequencies between 10
kHz and 30 MHz and 5 V/m at frequencies between 30 MHz and 1 GHz.
Once a coaxial cable segment and all its components have been installed it is essential that the
worst-case reflections on the cable are determined. These should never exceed 7% of the injected
amplitude of the original signal. The reflection coefficient can be checked by means of a
reflectometer.
The overall loop resistance of a coaxial cable segment together with all its plugs and connectors
may not exceed a maximum of 5.
The minimum radius of any bend in the cable may not be less than 21 cm. Where multiple
bending is anticipated the radius must not be less than 40 cm.