User Guide

Advanced Options 4
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Advanced Options
This section describes the advanced configuration options for
the PSpice Optimizer.
To displa
y
the Advanced Options dialo
g
box
1
From the Options menu, select Defaults.
2
Click the Advanced Options button.
Controllin
g
Cutback (Cutback
Option)
The Cutback option defines the minimum fraction by which an
internal step is reduced while the PSpice Optimizer searches for
a reduction in the goal’s target value.
To set cutback
1
In the Cutback text box, enter a decimal fraction that defines
the minimal percent reduction in internal step size.
If the data is noisy, consider increasing the Cutback value
from its default of 0.25.
Controllin
g
Parameter Value
Chan
g
es Between
Iterations (Threshold Option)
The Threshold option defines the minimum step size the PSpice
Optimizer uses to adjust the optimization parameters during the
optimization process.
The optimizer assumes that the values measured for the
specifications change continuously as the parameters are varied.
In practice, this assumption is not justified. For some analyses,
especially transient analyses, the Probe goal function values
The PSpice Optimizer saves
option settin
g
s to the .opt file so
that they remain with the
optimization’s parameter and
specification settin
g
s.
To
g
enerate a summary of the
option settin
g
s for a
g
iven
desi
g
n, select Report from the
File menu.