P-CAD Signal Integrity Wave Analyzer
P-CAD Signal Integrity Wave Analyzer displays the results of the P-CAD Signal Integrity Reflection or P-CAD Signal Integrity Xtalk simulations in an oscilloscope-like format.
The picture above shows the results of a Reflection simulation. On the right of the wave display wave names are listed under the name of their respective net.
The Wave Analyzer calculates performance parameters like overshoot, rise time, etc. of the nets analyzed. It provides facilities to file, edit and print the results, as well as options to modify the display and zoom-in on areas of interest. The actual values of the parameters can be displayed in the measurement area.
The Wave Analyzer commands are accessed through menus and icons as pictured below. Each command is described in this section.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Wave Analyzer File Commands
Wave Analyzer File Commands
The Wave Analyzer File commands deal with opening, saving and printing wave files.
File Open
The File Open command enables you to load a wave file onto the display.
The File Open command can be initiated from the File command pull-down menu or by its icon. When you choose the File Open command, P-CAD Signal Integrity displays the Open File dialog from which you can choose the directory and filename of the file you want to open.
Select the wave file you want to use from the files listed. The selection will be shown in the file name box, with the file type .dia. Click the Open button and the waves from the file will be added to the current display.
File Save
Use the File Save command to keep waves details in a file.
The File Save command can be initiated from the File command pull-down menu or by its icon. When you choose the File Save command, P-CAD Signal Integrity saves the displayed waves and their parameters in the currently open file. If none is opened yet the Save File dialog is displayed, on which you can enter a file name. The extension .dia is automatically assigned. This file will be over-written every time you issue a File Save command. If you want to save a wave file with a new file name, use the File Save As command.
Wave Analyzer File Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
File Save As
The File Save As command saves waves details in a new file with a name and location of your choice.
The File Save As command is initiated from the File command pull-down menu.
When you choose File Save As, the Save File dialog is displayed. Here you can specify the directory and filename for the wave file you want to save.
Enter the file name in the File name box, and click the Save button. The File type .dia is
automatically assigned and the next time you look in the file list the wave file will appear in the file list window with the extension added to the name.
File Print
The File Print command prints the current content of the Wave Analyser display.
The File Print command can be initiated from the File command pull-down menu or by its icon. When you choose the File Print, the Print dialog is displayed. Here you can specify the printer and print details.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Wave Analyzer File Commands
File Page Setup
The File Page Setup command enables you to define the page layout details for the printer. It deals with page orientation, margin size and paper size.
The File Page Setup command is initiated from the File command pull-down menu, and displays the Page Setup dialog.
You can specify the paper size and source, and the orientation and margins of the printed page. You can check your layout specification on the page model in the top of the window.
Edit Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
Clicking the Printer button displays the following dialog.
File Exit
The File Exit command closes the Wave Analyzer and returns to the P-CAD Signal Integrity screen.
Edit Commands
The Wave Analyzer Edit commands deal with managing the Wave Analyzer display.
Edit Copy
The Edit Copy command is initiated from the Edit command pull-down menu. The Edit Copy command copies the displayed waves to the clipboard so that you can load them to another program such as Word. The picture below shows a wave display copied from the Wave Analyzer.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Edit Commands
Edit Rescale
The Edit Rescale command rescales the display so that all the full waves fit into the diagram. If you issue the Edit Rescale command when the display is zoomed-in, the display reverts to the original size and scale, ignoring any range options specified for the X and Y axes.
The Edit Rescale command is initiated from the Edit command pull-down menu.
Edit Redraw
The Edit Redraw command redraws the display. The Edit Redraw command is initiated from the Edit
command pull-down menu.
Edit Delete Selected Wave
The Edit Delete Selected Wave command deletes the selected wave. A wave can be selected or de- selected by clicking with the mouse on the wave name (on the right of the waves display). The Edit Delete Selected Wave command is initiated from the Edit command pull-down menu.
Edit Delete all Waves
The Edit Delete all Waves command deletes all the displayed waves. The Edit Delete all Waves
command can be initiated from the Edit command pull-down menu.
Edit Clear Measurement Area
The Edit Clear Measurement Area clears the measurements box which is located on the right of the waves display area. The Edit Clear Measurement Area command is initiated from the Edit command pull-down menu.
Edit Zoom In
The Edit Zoom In command enables you to zoom-in on sections of the display. Click and hold the mouse button on the top left corner of the area you want to zoom-in on, then move the cursor to the lower right corner of the area and release the mouse button.
The Edit Zoom In command can be initiated from the Edit command pull-down menu or by its icon. The picture below shows a zoomed-in wave area.
Analyze Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
Edit Zoom Out
Use the Edit Zoom Out command to undo the last Zoom In. The Edit Zoom Out command can be initiated from the Edit command pull-down menu or by its icon.
Edit Origin
Use the Edit Origin command to undo all the Zoom Ins and restore the original waves display. The Edit Origin command maintains the range definitions for the X and Y-axis (set in the Options menu). The Edit Origin command is initiated from the Edit command pull-down menu.
Analyze Commands
The Wave Analyzer Analyze commands are used to switch between time domain and frequency domain display and to analyze performance parameters of the signal behavior.
Analyze Cartes
The Analyze Cartes command switches the waves display to a Cartesian coordinate system view. The picture below shows a wave display in Cartesian coordinate system view, which represents the time domain behavior of the signals.
The Analyze Cartes command can be initiated from the Analyze command pull-down menu or by its icon.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Analyze Commands
Analyze FFT
The Analyze FFT command switches a wave display to the frequency domain view which is calculated using Fast Fourier Transformation (FFT).
The picture below shows this display method which can be used to analyze the frequency spectrum of the signals. By this, frequencies that may be radiated from the trace with high energy can be detected.
The Analyze FFT command can be initiated from the Analyze command pull-down menu or by its icon. You must select a wave before you initiate the Analyze FFT command.
Analyze Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
Click the Analyze Cartes icon to revert to the Cartesian coordinate system.
Analyze Rise Time
The Analyze Rise Time command displays the rise time of the selected wave in the measurement area. The picture below shows this display.
The Analyze Rise Time command can be initiated from the Analyze command pull-down menu or by its icon.
This displays the Rise Time for wave U3.5.
Analyze Fall Time
The Analyze Fall Time command displays the fall time of the selected wave in the measurement area. The picture below shows this display.
The Analyze Fall Time command can be initiated from the Analyze command pull-down menu or by its icon.
This displays the Fall Time for wave U3.5.
Analyze Minimum
The Analyze Minimum command determines the minimum of the selected wave within the currently visible area (zoomed or unzoomed) and displays it in the measurement area. If there are several minima with the same Y value, the one with the lowest X value is displayed. The Analyze Minimum command can be initiated from the Analyze command pull-down menu or by its icon.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Analyze Commands
Analyze Maximum
The Analyze Maximum command determines the maximum of the selected wave within the currently visible area (zoomed or unzoomed) and displays it in the measurement area.
The Analyze Maximum command can be initiated from the Analyze command pull-down menu or by its icon.
If there are several maxima with the same Y value, the one with the lowest X value is displayed.
This displays the maximum for wave U3.5.
Analyze Baseline
The Analyze Baseline command determines the values of the base line for the selected wave and displays these in the measurement area.
These values are the basis for the calculation of the rise and fall times of the slopes of a signal. In order to calculate the values for the base line a grid is superimposed on the coordinate system and the frequency with which the coordinates occur within the discrete grid cells (events) is evaluated with the aid of a histogram. The lower maximum values of the histogram are the values for the base line. Due to this type of analysis the section in which the slope to be analyzed is displayed is significant. This means the results depend on the zooming.
The Analyze Baseline command can be initiated from the Analyze command pull-down menu or by its icon.
This displays the base line for wave U3.5.
Analyze Topline
The Analyze Topline command determines the values of the top line for the selected wave and displays these in the measurement area.
These values are the basis for the calculation of the rise and fall times of the slopes of a signal. In order to calculate the values for the top line a grid is superimposed on the coordinate system and the frequency with which the coordinates occur within the discrete grid cells (events) is
Options Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
evaluated with the aid of a histogram. The higher maximum values of the histogram are the values for the top line. Due to this type of analysis the section in which the slope to be analyzed is displayed is significant. This means the results depend on the zooming.
The Analyze Topline command can be initiated from the Analyze command pull-down menu or by its icon.
This displays the top line for wave U3.5.
Options Commands
The Wave Analyzer Options commands deal with modifying the waves display attributes.
Options Measurement Area
The Options Measurement Area command toggles the display of the measurement area. The
Options Measurement Area command is initiated from the Options command pull-down menu.
Options Wave Names
The Options Wave Names command toggles the display of the wave names. The Options Wave Names command is initiated from the Options command pull-down menu.
Options Display
The Options Display command enables you to set the fonts and colors for the Title, Axis, Wave Names as well as the Background, Foreground and Highlight on the simulation result display area. The Options Display command is initiated from the Options command pull-down menu.
Chapter 7: P-CAD Signal Integrity Wave Analyzer Options Commands
Clicking any of the buttons in the Fonts column of the Options Display dialog displays the Font dialog. This enables you to specify the font characteristics. These take effect when you click the OK
button.
Clicking any of the buttons in the Colors column of the Options Display dialog displays the Color dialog. This enables you to specify the background, foreground and highlight colors. They take effect when you click the OK button.
Options Commands Chapter 7: P-CAD Signal Integrity Wave Analyzer
Options Coordinate System
The Options Coordinate System command enables you to select the type and line style of the grid and the title of the diagram displayed in the simulation result display area.
The Options Coordinate System command is initiated from the Options command pull-down menu.