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Cableproduction
Wire & Cable ASIA – March/April 2011 77
OptEM offers a range of
software products that pro-
vide accurate electromagnetic
and signal integrity analysis of
high-speed high-performance
electronic interconnects.
Fabrication information and
standard design datafiles
are used throughout all of
OptEM’s software products to
simplify the input process.
On output, the software
tools provide a variety of
detailed reports, interconnect
SPICE models, reflection and
crosstalk values, S-parameter
plots, and other critical signal
integrity information for design
engineers.
OptEM Cable Designer is
a CAE design tool used for
designing and simulating the
performance of all types of
copper cables.
In particular, the software
models unshielded and
shielded twisted-pair, quad, ribbon, subsea umbilical and speciality cables,
as well as flex circuits from DC to 10 GHz in telecommunication and data
transmission applications.
At high frequencies the behaviour of the signal that travels along the cable
changes due to electromagnetic effects, and typical problems encountered
include increased attenuation, dispersion, distortions and crosstalk.
OptEM Cable Designer uses a hierarchical-design modelling concept where
existing design elements are used as building blocks (instances) in constructing
higher level designs.
Objects in the cross section are tagged to identify key object properties including
the core material (conductor or dielectric), plating and object name.
Each design-element instance has its own unique position, rotation and lay
length properties which provide realistic twisting parameters for individual pairs,
bundles, shields and cables.
The software performs an EM field analysis to generate accurate ASCII reports
for LRCG parameters, and plots S-parameter data for RL, IL, NEXT, FEXT,
ELFEXT, and PS-NEXT and PS-FEXT.
Two new Design Advisor modules have recently been added to the software:
Pair Advisor – iteratively calculates conductor and insulate diameters which 1
fulfil a selected standard using assigned design properties for a shielded or
unshielded pair
Lay Length Advisor – calculates the lay lengths of a four-pair cable based on 2
assigned design properties and ratios between NEXT resonance frequency
and the maximum frequency for diagonal and side-by-side pairs
OptEM Engineering Inc – Canada
Email:
Website:
CANDOR Sweden AB
Tel: +46 11 21 75 00 Email:
Fax: +46 11 12 63 12 Website:
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OptEM Cable Designer
The main screen on OptEM Cable Designer ❍
❍