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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 contain data on
the selected channel only, because the radio used in a wireless
adapter can receive data only on one channel at a time. Once you've
selected a different channel for monitoring, another channel will
be added to the table. Alternatively, if you use the
Scanner
to sweep
through the channels and the Show
data in main window while scanning box in the Scanner options
is checked, the table will contain data on all the scanned channels
for which at least one packet has been captured. This is sometimes
a convenient method of surveying a site.
Because the 802.11b/g
standard uses overlapping channel frequencies, you may 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 802.11b/g channels, 802.11a channels don't overlap. The
802.11n standard uses either the 802.11b/g band (2.4 GHz) or the
802.11a band (5 GHz).
Channel
– the channel
number.
Packets
– the total
number of packets transmitted (Data + Management +
Control).
Data
– the number
of Data packets transmitted.
Mngt
– the number
of Management packets transmitted.
Ctrl
– the number
of Control packets transmitted.
Signal
– 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
– 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 doesn't support
it, this column will not be visible.
Rate
– data
transfer rate in the min/average/max format. The average value is
calculated since the data in this table was last reset.
Encryption
– the number
of Data packets for which the encryption flag was set.
Retry
– the number
of packets where the Retry flag was set.
ICV
Errors – the number of packets
with ICV errors. See
Understanding CRC and ICV
Errors for a detailed
explanation.
CRC
Errors – 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 View
=>
Channels
Columns menu. The column order can
be changed by dragging the column header to a new
location.
Menu Commands
Right-clicking on the IP
Statistics list brings up a menu with the following
commands:
Save
Channels As
– allows you
to save the contents of the Channels tab as an HTML
report.
Clear
Channels – clears the
table.
More
Statistics – shows a window with
data transfer and
protocol distribution statistics.
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