User`s guide

Monte Carlo Analysis 13
-21
To run the simulation and load Probe with data
1
From the Analysis menu, select Simulate.
When complete, Probe automatically starts. Because PSpice
A/D ran a Monte Carlo analysis, PSpice A/D saved multiple
runs or sections of data. These are listed in the Available
Sections dialog box.
2
In Probe, in the Available Sections dialog box, click All, and
then OK.
To displa
y
a histo
g
ram for the 1 dB bandwidth
1
In Probe, from the Plot menu, select X Axis Settings.
2
In the Processing Options frame, select (
✓) the
Performance Analysis check box.
The display changes to the histogram display where the Y
axis is the percent of samples.
1
From the Trace menu, select Add.
2
In the Goal Functions list, select:
Bandwidth(1, db_level).
3
In the Simulation Output Variables list, select V(OUT).
4
In the Trace Command text box, position the cursor after the
V in Bandwidth(V(OUT) , ) and type
DB.
The text box should now read like this:
Bandwidth(VDB(OUT) , )
5
In the Trace Command text box, position the cursor after the
comma and type
1 for the 1 dB level.
The text box should now read like this:
Bandwidth(VDB(OUT) , 1)
6
Click OK to view the histogram.
To chan
g
e the number of histo
g
ram divisions
1
From the Tools menu, select Options.
2
In the Number of Histogram Divisions text box, replace
10
with
20.
or press !
For information about
performance analysis, see
Example: RLC Filter on
page 12-3.
You can also display this histo
g
ram
by usin
g
the performance analysis
wizard to display Bandwidth
(VDB(OUT) , 1).