Use the Crossviews option to view the thermal analysis results for individual layers of the package. The Crossviews option has two commands:

• X-cross enables you to view layers along the package x-axis.
• Y-cross enables you to view layers along the package y-axis.

• Select the X-cross command from the Crossviews option header menu. A pointer arrow appears at the intersection of the x/y axis (see Figure 19).
Figure 19 X-cross Command  
• Select a x-axis cross-section you want to view and press Enter. A X-cross View window appears (see Figure 20).
Figure 20. X-cross view window  
• Select the Zoom button to see an enlarged diagram.
• Select the Cancel button or press Esc to exit the window. The X-cross command is still active and the pointer arrow will return to the x/y axis intersection.
• Select a new x-axis layer for viewing, or exit to return to the Thermal Display menu.

• Select the Y-cross command from the Crossviews option header menu. A pointer arrow appears at the x/y axis juncture.
• Select a y-axis cross-section you want to view and press Enter. A Y-cross View window appears (see Figure 21).
Figure 21. Y-cross view window  
• Select the Zoom button to see an enlarged diagram.
• Select the Cancel button or press Esc to exit the window. The Y-cross command is still active and the pointer arrow has returned to the x/y axis juncture.
• Select a new x-axis layer for viewing, or exit to return to the Thermal Display menu.

Use the Range option to improve resolution of the temperature mapping produced by the thermal analysis. The Range option has three commands:

• Manual enables you to vary the starting temperature and the temperature increments on the temperature scale.
• Sigma (Default) invokes the default temperature values CADMP-II used to produce the thermal analysis, and redraws the original temperature mapping.
• Min/Max invokes the minimum & maximum temperature values of the package.

• Select the Manual command from the Range option header menu. The window in Figure 22 appears. The blue highlight bar is over the starting value of the temperature scale.
Figure 22. The Manual command  
• Type a new value.
• Move the highlight bar to the Increment field. Type a new increment value.
• Select the OK button to accept the new values. Select the Cancel button to cancel them.
• If you accept the new values, you return to the Thermal menu. CADMP-II remaps the color-coded thermal analysis results (see Figure 23). If the remapping is not satisfactory--that is, does not show the temperature differences in sufficient detail-- repeat Steps 1-4 above until the results are satisfactory.

7.1.8.2 The Sigma (Default) Command

• Select the Sigma(Default) command from the Range.
• Select the OK button to accept the new values. Select the Cancel button to cancel them.
• If you accept the new values, you return to the Thermal menu. CADMP-II remaps the color-coded thermal analysis results. If the remapping is not satisfactory - that is, does not show the temperature differences in sufficient detail - repeat the steps 1-2 above until the results are satisfactory.

Select the min/max command from the Range option header menu. You return to the Thermal Display screen with minimum and maximum temperature values on the package.