**Actual Point Count:** Displays the number of data
points plotted.

**Clear Overplot Y:** Clears all signal traces from a
plot.

**Decibel Y:** Rescales the *y*-axis to display the
values in decibels.

**dT:** When you activate **External**
**Trigger**, the plot block acquires data at an unknown rate. **dT**
allows you to specify the delta time between data points.

**External Trigger:** Determines whether simulation data
is displayed in the plot based on the value of an external trigger. When
activated, a round input connector is attached to the plot block. When signal
values entering the external trigger are 1, simulation data is plotted; when
signal values entering the external trigger are 0, simulation data is not
plotted. This parameter is particularly useful when plotting vector data. See Plotting vector data. To save
vector data to a file and read it in another application, use the export block.

**Fixed Bounds:** Specifies the region of the plot you
want to view. Note that the plot will always plot from the Start to the End values in the System
Properties dialog. When you activate **XY Plot**, the **Y Upper
Bound** and **Y Lower Bound** values under the Axes tab are used.

**Frequency Domain:** Obtains the frequency power
spectrum using the Fast Fourier Transform (FFT) algorithm.

Do not obtain frequency power spectrum data until after you have run a simulation. If you halt the simulation prematurely, the fidelity of the FFT is diminished.

If your frequency domain plot produces unexpected peaks,
check the simulation step size to verify that your sampling rate is adequate for
obtaining accurate results. Then, based on the simulation step size and range,
check **Plotted Points** to verify that you are indeed plotting each time
step.

**Geometric Markers:** Overlays signal traces with
geometric markers.

**Grid Lines:** Extends grid lines from the vertical and
horizontal axis coordinates. The vertical and horizontal spacing of grid lines
is controlled by the spacing of the axis coordinates. Embed automatically
establishes reasonable axis coordinate spacing and hence controls the grid
frequency.

**Line Type:** Point displays signal values as
individual data points. Point plots show the separation of data as time
advances.

Line connects data points with solid line segments. On color displays, line segments are the color of the corresponding input connector. On monochrome displays and printers, line patterns distinguish signal traces. You may have to lower the point count to allow enough room between data points for the pattern to be displayed. If this is not satisfactory, you can overlay signal traces with geometric markers.

Discrete holds the Y value constant from point to point. A discrete plot is helpful when data points are irregularly spaced and you do not know where the curve is accurate.

**Log X and Log Y:** Allow data to be plotted in
logarithmic and semi-logarithmic coordinate systems. When you specify a
logarithmic or semi-logarithmic plot, you cannot plot negative values on the log
axis. Any negative value will be clipped to the low end of the scale. When
neither parameter is activated, the plot defaults to linear.

**Marker Count:** Determines the number of markers
overlaid on each signal trace. By default, Embed overlays each data point in a
signal trace with a marker; however, if this is not satisfactory, you can enter
a new number in **Marker Count**. Entering -1 in this box indicates all data
points have markers associated with them.

**Max Plotted Points:** Determines the smoothness and
accuracy of a plot. The more data points you plot, the smoother and more
accurate the plot. However, increasing the number of plotted data points also
increases the time it takes to print and display the plot.

The maximum number of data points that can be plotted is 250 million. Entering 0 plots every data point.

If you know the maximum number of data points you want plotted in all your plots, you can set it as the default.

**Multiple XY Traces:** Creates two independent XY
plots, which allows two signals to be superimposed. The **XY Plot** parameter
must be activated to use **Multiple XY Traces**.

**Over Plot:** Displays the results of multiple
simulation runs in a single plot. This allows for better insight into how small
changes can affect overall system performance. Enter the number of overplots in
**Plot Count**.

**Past Weight Value:** Specifies the values of the
previous simulation runs to be averaged into the current run. Specify the value
as a fraction of 1.

**Plot Averaging:** In multi-run simulations, the values
of the previous run are averaged into the current run using **Past**
**Value** **Weight** as a fraction of 1. This is useful for filtering out
noise.

It is recommended you activate **Fixed** **Bounds**.
In addition, you must activate **Auto**-**Restart** under System > System
Properties > Range.

**Plot Count:** Sets the number of overlapping
plots.

**Read
Coordinates****:** Overlays the plot with a set of crosshairs and
displays crosshair position at the bottom of the plot. When you click the mouse
button, Embed freezes the crosshairs. Click again to erase the crosshairs.

**Retain Coordinates:** Displays two crosshairs. One
crosshair is frozen at the last known *x*,*y* position. The other is
controlled by the position of the pointer.

**Save Data To File:** Opens the Select File dialog to
specify a file to which the plot data is to be saved.

**Snap To Data:** Causes the data point closest to the
pointer to have a magnetic-like pull on the crosshair. As you move the pointer,
the crosshair continues to jump to the closest data point.

**Truncate FFT Data to 2^n:** Truncates data down to the
nearest power of 2. If you do not activate this parameter, the data buffer is
padded with zeros to round up to the nearest power of 2. This parameter can be
turned on only when **Frequency** **Domain** is activated.

**XY Plot and X Axis:** Together**, XY Plot** and
**X Axis** let you use one input signal to represent X coordinate generation.
As time advances, the remaining input signals are plotted relative to the*
x-*axis signal.

**To
specify an XY plot**

1. Activate
**XY Plot**.

2. In the X Axis
drop-down menu, choose the **input signal** to be used for x*
*coordinate generation: 1 represents the input signal attached to the top
connector on the plot block, 2 represents the input signal attached to the
second to the top connector on the plot block, and so on.

3. Click
**OK**, or press **ENTER**.