User guide

2 Chapter 1: Introduction
AirMagnet Spectrum XT User Guide
Channel Power Graph
The Channel Power graph shows the current and maximum (aggregated) channel energy. The
graph can display either Envelope Power or Integrated Power. The former refers to the
highest power reading and the latter shows the total summation of power readings over a
specific bandwidth.
Channel Duty Cycle Graph
The Channel Duty Cycle graph shows the percentage of the time that the average power in the
channel is greater than 20 dBm above the noise floor.
Non-WiFi Devices
The Non-WiFi Devices table lists all non-WiFi devices whose spectrum information has been
detected by the application, along with some key data about each device. The devices are
organized by category which includes Bluetooth devices, microwave ovens, cordless phones,
baby monitors, FR Jamters, and wireless cameras.
Event Spectrogram
The Event Spectrogram provides a visual presentation of real-time information about events
(device detections) that the application has detected in the network. Each detection is an event
which is represented by a colored line. The color of the line indicates the signal strength of the
device being detected. If more detections are made of the same device as the application
sweeps the spectrum, more lines will be stacked on top of the line of the initial detection. As a
result, a thick color band will result. The height of the color band indicates the (length of time
in seconds the device has been detected. It stops increasing when the device becomes inactive
(meaning that the device has not been detected for a minute). The width of the line/band
indicates the channels or frequencies being affected by the device. If the device is a frequency-
hopping device, then the line/band may extend sideways as the device hops from one
channel to another.
Interference Power
The Interference Power graph displays the average power readings of interfering devices on
the selected channel or channels.
Channel Duty Cycle vs Time
The Channel Cycle vs. Time graph is a trending chart which shows the average power in the
channel is above the noise floor over a specific period of time.
Interference Power vs Time
The Interference Power vs. Time graph is a trending chart which shows the maximum average
power readings of interfering devices operating on the selected channel over a specific period
of time.
WiFi Graphs
AirMagnet Spectrum XT offers many WiFi graphs to complement its spectrum capability.
These WiFi graphs offer critical data about the performance of a WiFi network. The nine WiFi
graphs are: