User guide

54 Chapter 5: Auto Pattern Detection and Custom Device Classification
AirMagnet Spectrum XT User Guide
What the user can tune:
The Auto Detect feature processes both the “current” and the “max” FFT data. As such there
are two parameters the user may tune in order to affect the algorithm: “Noise Floor for max
Reading” and “Noise Floor for Current Reading”. See Figure 5-3.
In RF environments where the FFT readings are consistently higher (or lower) than these
values, the efficacy of the algorithm may be improved by tuning these values to match the
lowest expected FFT readings for current and max respectively.
Figure 5-3: Auto Detect configuration
Custom Device Classification Manager
The first step in using custom classification is determining whether there may be an
unclassified device detected in your environment. Each RF interferer has its own signature
pattern on the Real Time FFT chart. This helps the user to recognize a distinct pattern for the
device.
In Figure 5-4, a pattern shows up that looks like a narrowband transmitter. At this point, if the
device is not known to the user, a directional antenna would work best to locate the device
within the environment for labeling in the custom classification.