Importing or Drawing Floor Details 1092 In the Unit of Measurement list, select Feet or Metric. If you areimporting a drawing of a floor plan, choose the measurement system thedrawing uses.3 In the Height of the Ceiling box, type the number of feet or meters fromthe floor to the ceiling (1 to 1000 feet or meters).The ceiling height is based on the surface of the ceiling where the accesspoints will be mounted, not on the center of the plenum space betweenfloors.4 In the Ceiling Type box, select the type of ceiling used most commonly inthe building.3WXM adjusts the default attenuations based on your selection.5 To change the default attenuation for radios, type the number of dB inthe 802.11a (dB) box or 802.11b/g (dB) box.6 Do one of the following:■ Click Apply Changes to apply the changes.■ Click Ignore Changes to clear the changes without applying them.7 Do one of the following:■ Click Next to configure floor information for the building. (See“Importing or Drawing Floor Details”.)■ Click Finish to save the changes and close the wizard.Importing orDrawing FloorDetailsYou can add information for a floor by importing a drawing of the flooror by using 3WXM’s graphics tools to draw the floor.After you import or draw the floor, you need to specify the RFcharacteristics of the floor, by specifying the attenuation of obstacles suchas walls, doors, windows, and so on. The attenuation of an objectindicates how much the object affects an 802.11 radio signal. 3WXMuses the attenuation information when calculating how many MAPs youneed and where to place them in order to provide the desired wirelesscoverage.The following sections describe how to import or draw a floor. Forinformation about specifying the RF characteristics of the floor, see“Specifying the RF Characteristics of a Floor” on page 128.
