This tab displays per-channel statistics for all the channels that
have been or are being monitored. The number of channels shown in
this table depends on the way you use CommView for WiFi. Normally,
when you monitor only one channel used by your WLAN, the table will
solely contain data on the selected channel, because the radio used
in a wireless adapter can receive data on only one channel at a
time. Once you have selected a different channel for monitoring,
another channel will be added to the table. If you select
tab, the table will contain data on all the scanned channels for
which at least one packet has been captured.
Because the 802.11 standard uses overlapping channel frequencies in
the 2.4 GHz band, you might notice that even if your WLAN is
configured to use only one channel, e.g. 6, you will still see
non-zero values for the adjacent channels. Unlike 2.4 GHz channels,
5 GHz channels do not overlap.
On the bottom pane, you can see
tables. These tables display detailed statistics for the selected
channel based on the packet types and subtypes and on the data
On the left pane, you can see three charts:
chart displays the signal level for the top ten nodes found on the
selected channel. The
charts show the number of packets and Mbytes per second captured on
the selected channel. When working with information provided on
these charts, please note the following:
charts display data for the selected channel only.
charts are updated only when the application actually captures data
on the select channel. This means that if, for example, you are
capturing data on channel 2 and select channel 2 from the channel
list, the charts will be constantly updated. If you select channel
3, the charts will be "frozen." If you work In
and select any channel, the charts will be updated every time the
application sweeps through the selected channel.
The meaning of the channels table columns is explained
– channel number.
– channel frequency in MHz.
– the total number of captured packets.
– signal level in the min/average/max format. The average value is
calculated since the data in this table was last reset. Please
refer to the
Understanding Signal Strength
chapter for more information.
– noise level in the min/average/max format. The average value is
calculated since the data in this table was last reset. Noise
information may not be available from all adapters. If your adapter
does not support it, this column will not be visible.
– data transfer rate in the min/average/max format. The average
value is calculated since the data in this table was last
– the number of packets where the Retry flag was set.
– the number of packets for which the Fragmented flag was
– the number of Data packets for which the Encrypted flag was
– the number of packets with CRC errors. See
Understanding CRC and ICV Errors
for a detailed explanation.
You can show or hide individual columns by right-clicking on list
header or using the
menu. The column order can be changed by dragging the column header
to a new location. Right-clicking on the channel list brings up a
menu with the following commands:
– finds the packets sent on the selected channel and displays them
in a new window.
– allows you to save the contents of the Channels tab as an HTML
– clears the table.
More Statistics –
shows a window with
data transfer and
protocol distribution statistics.
Right-clicking on the
tables brings up a menu with the following command:
– finds the packets with the selected packet type or data rate and
displays them in a new window.