Changes

===Lumped Sources===

A '''Lumped Source '''is the most commonly used way of exciting a structure in EM.Cube's [[FDTD Module]]. A lumped source acts as a voltage source in series with an internal resistance that is placed between two adjacent mesh grid nodes on a line object. The line object must be parallel to one of the three principal axes. <font color="red"><u>'''In order to create a lumped source, you must have at least one line object in the project workspace.'''</u></font>

* In the box labeled '''Offset''', enter the distance of the source from the start point of the line. A lumped source by default is placed at the center of the host line. In other words, the default offset value is equal to half the length of the host line object.

* In the '''Source Properties''' section, you can specify the source '''Amplitude''' in Volts, '''Phase''' in Degrees and internal '''Resistance''' in Ohms.

===Waveguide Sources===