HP Manager Software manual Specifying the RF, Characteristics of a, Floor

130CHAPTER 4: PLANNING THE 3COM MOBILITY SYSTEM

Specifying the RF	3WXM uses RF attenuation information in the floor plan when
Characteristics of a	calculating how many MAPs you need and where to place them to
Floor	provide the wireless coverage required for the floor. The RF attenuation
	information comes from the attenuation values associated with objects
	on the floor plan that have been converted into RF obstacles. An RF
	obstacle is an object that has an attenuation value associated with it.
	You can add RF obstacles to a floor plan in the following ways:
	„ Select the objects that will be RF obstacles and assign attenuation
	values to them. This method is available for floor plans that are
	imported from CAD drawings. (See “Converting Objects into RF
	Obstacles” on page 130.)
	„ Use the graphics tools in the Insert RF Obstacle group box of the Edit
	Content page to draw the RF obstacles and assign attenuation values
	to them. This method is available for any floor plan. (See “Drawing RF
	Obstacles” on page 133.)
Recommendations	Consider the following when creating RF obstacles:
	„ Be aware if a CAD drawing contains overlapping objects. If you create
	RF obstacles on objects that are on top of each other, the attenuation
	is increased at that point. (3WXM sums the attenuation factors in dB.)
	„ Grouping objects is useful if you want one attenuation factor for an
	area on the floor.
Converting Objects	You have several options when creating RF obstacles:
into RF Obstacles	„ Convert all objects in a layer of a CAD drawing into RF obstacles.
	„ Convert all objects in an area of the drawing into RF obstacles.
	„ Convert multiple objects in the drawing into RF obstacles.
	„ Convert grouped objects in the drawing into RF obstacles.
	To create RF obstacles for all objects in a layer
	3WXM preserves the layers defined in a CAD drawing. You can convert
	all of the objects in the layer into a specific type of RF obstacle.

1In the Layer Name column in the Edit Content page (in the Building wizard), right-click the layer row in the table.

2Select Create RF Obstacles. The Create RF Obstacle dialog box appears.