Cisco AIR-PCI340 Installation And Configuration Manual page 166

Running an RF Link Test
Table 7-5
Linktest Statistic
Current Noise Level
(2.4-GHz client adapters)
Current Beacons Received
(5-GHz client adapters)
Overall Link Quality
Signal to Noise Ratio
(2.4-GHz client adapters)
If you did not set the link test to run continuously, the test ends after the specified number of packets is
Step 6
sent, and the Stop button changes back to the Start button. To stop the link test at any time, click Stop,
OK, or Cancel.
Cisco Aironet 340, 350, and CB20A Wireless LAN Client Adapters Installation and Configuration Guide for Windows
7-22
Linktest Statistics (continued)
Description
The level of background radio frequency energy in the 2.4-GHz
band. The lower the value and the more green the bar graph is, the
less background noise present.
Range: –100 to –45 dBm
Note
The percentage of beacon packets received versus those expected
to be received. The higher the value and the more green the bar
graph is, the clearer the signal.
Example: The access point sends out 10 beacons per second, so
Range: 0 to 100%
Note
The client adapter's ability to communicate with the access point,
which is determined by the combined result of the adapter's
signal strength and signal quality.
Value:
Note
The difference between the signal strength and the current noise
level. The higher the value, the better the client adapter's ability
to communicate with the access point.
Range: 0 to 90 dB
Note
This setting appears only for 2.4-GHz client adapters and
only if you selected signal strength to be displayed in
dBm. See the Signal Strength Display Units parameter in
Table 7-2 for information.
you would expect the client adapter to receive 50
beacon packets in 5 seconds. If it receives only 40
packets, the percentage of beacons received would be
80%.
This setting appears only for 5-GHz client adapters.
Not Associated, Poor, Fair, Good, or Excellent
This setting appears for 2.4-GHz client adapters (but only
if you selected signal strength to be displayed as a
percentage) and for 5-GHz client adapters. See the Signal
Strength Display Units parameter in
information.
This setting appears only for 2.4-GHz client adapters and
only if you selected signal strength to be displayed in
dBm. See the "Signal Strength Display Units" parameter
in Table 7-2 for information.
Chapter 7 Performing Diagnostics
Table 7-2 for
OL-1394-07