Histogram Plots

This section will cover histogram plots and their properties.  Some plot properties are based on histogram window settings.  For more information on window specific settings (including adding plots to windows) see the histogram window overview.


Histogram Plot Overview

Histogram plots consist of two parts, the title bar (items 1-3 below) and the plot area (items 4-7 below).  The plot area is free floating and will not necessarily be next to the title bar information.  The plot can overlap other plots using different zoom and spread settings.  The waveform color will always match the plot name color, and for all spread modes other than common zero are shown in the same order from top to bottom.

1. Plot Name & Label	This is the name of the AE that supplies data to the plot and the label found in the plot properties.
2. Maximize/Restore Plot	Toggles the view for the plot.  If the plot is in normal view (shown above), clicking this icon will maximize the plot, showing only this plot in the plot area of the histogram window.  When in maximized view, the icon changes to a double square, and clicking on it will return the plot to normal view (all plots for this window are visible).
3. Plot Properties	Clicking this icon will make the properties page visible, select the display tab, and select the plot in the properties tree.  See the detailed description of histogram plot properties for more information on plot properties.
4. Histogram Bins	Each vertical line in the histogram represents a single bin. The plot range is evenly divided based on the available pixels to draw the plot. As the plot is resized the bins will be combined or separated into new bins. If there are ever more pixels than bins, the bins will be drawn wider such that the entire plot is used.
5. X Axis Min/Max Labels	The minimum and maximum values of the histogram data are labeled along the axis. The user can override the defaults by changing the plot properties. See the detailed description of histogram plot properties for more information on plot properties.
6. X Axis Label	The axis is labeled with units when applicable.
7. Y Axis Min/Max Labels	The minimum and maximum values of the histogram data are labeled along the axis. The user can override the defaults by changing the plot properties. See the detailed description of histogram plot properties for more information on plot properties.
8. Y Axis Label	The axis is labeled with units when applicable.

Histogram Plot Properties

The Histogram plot properties are shown in the properties window when a  Histogram window or a Histogram plot is selected in the properties tree. Selecting a Histogram window will allow you to make changes to all plots in the window.  Selecting an individual plot will only allow changes to that individual plot.

1. Plot Label	Enter a label into the edit box.  The label will be displayed after the plot name in the tree view on the properties page.
2. Auto Scale Axis	This is used to enable and disable plot auto scaling functionality. This can be changed at any time. The check box must be in 1 of the following states: Checked :  The plot will determine what axis ranges should be used for display. Unchecked:  The plot will display axis ranges from user input.
3. Min Frequency	Sets the minimum frequency in Hertz for the X axis on FFT plot types. This can only be modified when Auto Scaling is disabled.
4. Max Frequency	Sets the maximum frequency in Hertz for the X axis on FFT plot types. This can only be modified when Auto Scaling is disabled.
3. Min Voltage	Sets the minimum voltage in microvolts for the Y axis on FFT plot types. This can only be modified when Auto Scaling is disabled.
4. Max Voltage	Sets the maximum voltage in microvolts for the Y axis on FFT plot types. This can only be modified when Auto Scaling is disabled.