User guide

AirMagnet Laptop Analyzer User Guide
Appendix B: Glossary 155
Signal
In wireless networking, any electrical pulse or frequency that carries meaningful data. See
RSSI.
Spectrum Density Graph
A graph that shows the “popularity” of a particular frequency/power reading over time in
the radio spectrum.
Spectrum Type (Current, Average, Maximum)
Refers to the type of spectrum data presented in the Real-Time FFT graph. AirMagnet
Spectrum XT can show three types of spectrum data:
• Current —The up-to-the-minute power readings being recorded.
• Average—The average historical power readings recorded since the beginning of the
session.
• Maximum—The highest power readings that have been recorded since the session
began.
Spectrogram Graph
Provides another way to present the same data as shown in the Real-Time FFT graph. It shows
changes in the spectrum over a period of time and identifies any shift in frequency use and the
duration of such shifts.
SSID (Service Set Identifier)
A unique name given to a WLAN and shared by all devices, e.g., APs, stations, etc. operating
in the WLAN.
Start Channel
A setting in the configuration of the Channel Power and Channel Duty Cycle graphs. It refers
to the first radio channel in the range of channels shown in the grape. See Stop Channel.
Start Frequency
A parameter used in the configuration of Real-Time FFT, Spectrum Density, and Spectrogram
graphs. It is the value of radio frequency at the lower end of the spectrum band in these
graphs. See Stop Frequency.
Station
In wireless networking, any device with a MAC address and a physical layer (PHY) interface
to the wireless medium that comply with the IEEE 802.11 standard, e.g., a laptop, PDA, etc.
Stop Channel
A parameter used in the configuration of the Channel Power and Channel Duty Cycle graphs.
It refers to the last radio channel in the range of channels shown in the grape. See Start Channel.
Stop Frequency