# Define Shield Properties - Legacy

This option allows you to define the shield properties by either a manual definition in the .pre file or by loading from file.

## Parameters:

Use legacy shields definitions
Unselect this option to define a layered shield using shield definitions from an SD card.
Define in *.pre file
Define the frequency dependent shield parameters based on measured transfer impedance and admittance data in the .pre file.
The file format used when importing measured cable data from file is described in Load Measured Cable Data From File.
Frequency
The frequency at which the transfer impedance and admittance are specified in the .pre file below.
Zt Magnitude - Magnitude of transfer impedance
The magnitude of the transfer impedance defined in the .pre file.
Zt Phase - Phase of transfer impedance
The phase of the transfer impedance defined in the .pre file.
Yt Magnitude - Magnitude of transfer admittance
The magnitude of the transfer admittance defined in the .pre file.
Yt Phase - Phase of transfer admittance
The phase of the transfer admittance defined in the .pre file.
Metallic material
PEC
Select this option to set the shield of the filaments to PEC.
Material label
The label of the metallic material (as defined in the DI card) to be used for the shield.
Coating
Material label for coating
The label of the dielectric (as defined in the DI card) to be used as the coating for the cable.
Thickness of layer for coating
Define the thickness of the dielectric coating.
Shield thickness
The thickness of the shield.

## Load Measured Cable Data From File

An example of an XML file containing fictitious measured data:
<?xml version="1.0" encoding="UTF-8"?>
<cableDB creator="name" date="2011-07-30" version="1.0">
<shielding name="shielding1">
</cableDB>