Cisco AIR-PCM340 Installation And Configuration Manual page 137

Chapter 7 Performing Diagnostics
The LSM screen is shown in Figure 7-10.
Figure 7-10 LSM Screen
The LSM screen provides a graphical display of the following:
• Signal quality – The quality of the access point's radio signal at the time packets are being received.
It is displayed as a percentage along the vertical axis.
• Signal strength – The strength of the radio signal received from the associated access point. It is
displayed as a percentage along the horizontal axis.
The combined result of the signal strength and signal quality is represented by a moving mark (see
Figure 7-10). Where the mark falls on the graphical display determines the quality of the RF link
between your client adapter and its associated access point. Differences in the quality of the RF link are
indicated by the following colors: green (excellent), yellow (good), orange (fair), and red (poor).
This information can be used to determine the optimum number and placement of access points in your
RF network. By using LSM to assess the RF link at various locations, you can avoid areas where
performance is weak and eliminate the risk of losing the connection between your client adapter and the
access point.
Selecting the Show History check box causes the graphical display to show a recent history of the RF
performance between your client adapter and its associated access point. Black dots on the graphical
display show the performance of the last 20 measurements.
Selecting the scanner check box causes the graphical display to show the signal strength of detected
access points on a diagonal line. Each access point is identified by Network Name or SSID. If the
Network Name is not available, the access point MAC address is displayed. The graphical scanner
display provides a quick visual indication of the access point signals.
Note When the scanner check box is checked, only access points configured for broadcast SSID are
displayed. Typically, access points configured for security are not shown.
OL-1377-01
Cisco Aironet Wireless LAN Adapters Installation and Configuration Guide for Mac OS
Diagnostic Tools for Mac OS X
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