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Three key interface elements affect what
data will be analyzed and how. These elements are overviewed
below.
The Plans and Surveys
tab on the right panel defines
what data the application will visualize. This tab is organized as
a hierarchical tree, where for each floor or site plan, you will
see one or more site surveys you have conducted. You need to
select the floor plan to be analyzed and mark one or more survey
paths to be included using the corresponding checkboxes. Depending
on where and when the surveys were conducted, you may want to check
all or only some of the survey checkboxes. For example, if you have
a large site and you made one break while conducting the site
survey, your walkabout path will consist of two parts, both of
which should be included in the analysis. In a different scenario
(e.g., if you surveyed the entire site prior to installing
additional wireless hardware and then surveyed it again after the
installation), you will probably want to include only one of the
surveys and then compare it with the other by changing the checkbox
selection. The Type column indicates the survey type:
Active,
Passive,
or Active+Passive.
We are reviewing active surveys in this chapter, so you should
select the surveys that are marked as Active
or Active+Passive
in this column. You can use
the Comments
column to add or modify
comments for surveys or modify the survey names for clarity at any
time.
The Visualization
drop-down box on the tool bar
defines what type of analytical tool will be applied to the
selected site plan. A visualization is a graphical representation
of WLAN characteristics displayed as an overlay on top of the floor
plan. The available visualization types will be described below. To
select a visualization, simply select the corresponding item from
the drop-down list, under the Active
section. To clear all
visualizations, select None. When no visualization is selected, the
floor plan is overlaid with the walkabout paths and guess range
areas (the zones within which TamoGraph can make a good assessment
of the WLAN parameters).
Unlike passive surveys, active
surveys do not include information on the APs in the survey area;
they are focused on the specific WLAN or AP to which you connected
during the active survey. For this reason, the Selected APs / All
APs buttons on the tool
bar are disabled when you select a visualization for an active
survey. The AP list might still be available if you also performed
a passive survey or if APs can be currently “heard” by the
application, but checking or unchecking the boxes next to the
listed APs has no effect in this case.
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