User guide

AirMagnet Spectrum XT User Guide
Chapter 6: Analyzing Spectrum Data 85
3) Click Apply and then OK.
Interference Power vs Time
The Interference Power vs Time graph provides a visual representation of the length of time in
which interferers are active. Note that this graph displays non-WiFi interference only, and can
help users identify non-802.11 interferers that are active consistently over time.
Figure 6-22: Interference Power vs Time
By default, the graph is set to display interferers separated into individual channels, allowing
the user to troubleshoot problems on up to three channels at a time. This configuration can be
modified, however, to display lines for each interferer present instead, making it significantly
easier to identify multiple sources of interference as well as their impact on the network.
Hovering over the lines in the graph provides additional details regarding the information
displayed, including interference level and the type of interferer (if known).
Table 6-7: Channel Duty Cycle vs Time Graph Parameters
Parameter Description
Trend Options Use these fields to specify the channels that should be displayed in the graph.
Users can select up to three channels at any single time.
Show First/
Second/Third
Trace
These fields activate or deactivate the trace options specified in the first portion
of the configuration. Select ‘Yes’ to activate (e.g., display) each trace as needed.
Selecting ‘No’ will remove the trace from the graph.
Maximum
Percentage
Allows the user to specify the maximum percentage to be displayed in thegraph.
Highlight the existing value and then override it with a new value.
Minimum
Percentage
Allows the user to specify the minimum percentage to be displayed in the graph.
Highlight the existing value and then override it with a new value.
Time Interval
(Secs)
The maximum number of seconds that will be displayed on the chart at any
given time.