Prepare The Floor Drawings - 3Com Wireless LAN Controller WX2200 User Manual

122 C 6: U
HAPTER SING
Prepare the Floor
Drawings
RF P
LANNING
If your floor drawings are contained in JPEG or GIF files, this step does not
apply. Go directly to "Define Site Information" on page 123.
If you plan to import AutoCAD DXF™ or AutoCAD DWG files into
3WXM, you should perform some "clean up" work before importing the
files. Doing this work before you import the files into 3WXM creates a
more compact file, requiring less storage space. Typically, the more CAD
diagram cleanup that is done within the CAD software, the more
smoothly the drawing will import into 3WXM.
To clean up the AutoCAD file:
Perform an audit
Turn on, unlock, and unfreeze all layers
Remove unnecessary notations
Purge unused blocks, line types, and layers
Typically, based on the drawing technique chosen when the drawing file
was created in AutoCAD or TurboCAD, a single object may be drawn
with more than one line; for example, walls. When such an object is
imported, it results in more than one object in 3WXM. To avoid the actual
object being defined as more than one obstacle, delete parallel lines
within a certain distance.
Another method you can use to achieve the same result is to group all
the lines into one object. For example, you might group four lines that
form an office or conference room to create one attenuation factor for
that entire area. Or, group multiple lines that were drawn in the floor
plan to create a bigger line.
Grouping lines is not always recommended. For example, grouping lines
into one object does not work well with polylines. Grouped polylines are
recognized by the planning tool in 3WXM as a single, monolithic
obstacle. This causes incorrect results when viewing RF coverage.
Objects must not be RF Obstacles or Groups before Clean Layout is
performed.