Applying Placement Rules

To change EMI Scanner Placement rules:

1. From the Rules pane, select one of the two subcategories under Placement:
   • I/O Filter Distance – displays the I/O Filter Distance to I/O Connector rule configuration.

     

     This rule states that all I/O filters must be placed within a specified distance of the I/O connector.

     From here, you can set the following:

     • Rule State – toggles I/O Filter Distance rules on or off.
     • Max Distance from Filter to I/O Connector – specifies the maximum distance a filter may be placed from the I/O connector.
     • Sort by Column – specifies the column by which results are sorted.
     • Log File State – determines whether EMI Scanner creates a log file with additional details (intended for use in debugging).
     • Weighting Factor – specifies the weighting factor (0<factor<=1) that is applied to violations of this rule when assigning a rank. A violation's rank is its own "degree of badness" multiplied by the weighting factor. See Exporting EMI Scanner Results and Analyzing EMI Scanner Results Using iQ-Harmony.
     • I/O Nets to Include – specifies the type(s) of I/O Nets to include. Select one, or Ctrl+click to select multiple types. See Technical Note.
   • Distance from Oscillator to Clock Driver – displays the Distance from Oscillator to Clock Driver rule configuration.

     

     This rule states that all oscillators must be placed within a specified distance from the clock driver or other device that they drive.

     From here, you can set the following:

     • Rule State – toggles Distance from Oscillator to Clock Driver rules on or off.
     • Max Distance from Oscillator to Clock Driver – specifies the distance within which all oscillators must be placed of the clock driver (or other device) that they drive.
     • Sort by Column – specifies the column by which results are sorted.
     • Log File State – determines whether EMI Scanner creates a log file with additional details (intended for use in debugging).
     • Weighting Factor – specifies the weighting factor (0<factor<=1) that is applied to violations of this rule when assigning a rank. A violation's rank is its own "degree of badness" multiplied by the weighting factor. See Exporting EMI Scanner Results and Analyzing EMI Scanner Results Using iQ-Harmony.
     • Require Only One Comp Pin to be Within Specified Distance – changes how EMI Scanner determines whether a component is inside or outside the grid. See Technical Note.
     • Require ALL Comp Pins to be Within Specified Distance – changes how EMI Scanner determines whether a component is inside or outside the grid. See Technical Note.
2. Rules are automatically saved for the current EMI scan. To save them for a future scan, click Save Rules.