LZ Card

This card can be used to assign a complex impedance to a segment.

On the Source/Load tab, in the Loads / networks group, click the  Load icon. From the drop-down list, click the  Complex load (LZ) icon.

Figure 1. The LZ - Load segment with complex impedance dialog.


Define/replace a load at a port
Define/replace a complex impedance load at the port with name Port defined using a PT card.
Define/replace a load at a segment (old format)
Define a load with the following parameters.
Remove all LZ type loads previously defined
This LZ card does not define a load, but rather all previously defined LZ loads are deleted. All the other input parameters of this card are ignored.
Load name
The name of the load.
Reverse feed orientation
By default, the vector of the voltage is orientated in the direction from the start of the segment to its end (the direction in which it was created). When this option is checked, the vector of the voltage is orientated in the opposite direction. This is the direction of the current flow through the segment. The internal EMF (electromotive force) of the impressed voltage source is in the opposite direction.
Label of segments to load
All segments with this label are assigned the complex circuit values specified below.
Complex impedance
The real and imaginary part of the complex impedance in Ω .
SPICE circuit
Specify the name of a one-port SPICE circuit to define a load between two pins. Define the SPICE circuit using the SC card.
Touchstone file
Specify a one-port Touchstone file (.s1p, .z1p, .y1p) to define a load.
Note: If the load is added to a port that has a voltage source, the load is placed in series with the voltage source.

The complex impedance value is a constant with respect to frequency. Frequency dependent impedances can be realised using the LS or the LP cards.

The LZ card may be combined with the LD, LP, LS and the SK cards, but only one LZ card may be used per label. If a second LZ card is used, it replaces the values entered by the first one. This card has no significance for surface elements, even when these are assigned the same label.