Advantech AIMB-217, Руководство по началу работы

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Page 35
Lastly, the Network section shows network-level parameters. The MAC-
address is resolved from ethers. The IPv4 address is shown in CIDR notation
(RFC 4632
address / prefix_len format). Since often those two values also
determine the broadcast address (last 32 - prefix_len bits set to 1), that address
is shown only if it does not derive from the interface address and prefix length.
Likewise, the interface MTU is shown only if it differs from the default
Ethernet MTU of 1500 bytes.
Level histogram (F2 or 'l')
This is a full-screen histogram plot showing the evolution of levels with time.
The screen is partitioned into a grid, with dBm levels shown in green at the
right hand side (depending on configuration). At the very minimum, the
evolution of the signal-level is shown. If the wireless driver also supports
noise-level information, additionally a noise graph and associated SNR graph
appear.
Scan window (F3 or 's')
A periodically updated network scan, showing access points and other wireless
clients. It is sorted depending on
sort_order and sort_ascending , see
wavemonrc. Each entry starts with the ESSID, followed by the colour-coded
MAC address and the signal/channel information. A green/red MAC address
indicates an (un-)encrypted access point, the colour changes to yellow for non-
access points (in this case the mode is shown at the end of the line). The
uncoloured information following the MAC address lists relative and absolute
signal strengths, channel, frequency, and the mode if the node is not an access
point. A status line at the bottom informs about the current sort order and a
few statistics, such as most (least) crowded channels (least crowded channels
are listed when sorting by descending channel).
The sort_order can also directly be changed via these keyboard shortcuts:
a scending, d escending; by e ssid, s ignal, c hannel ( C also with signal), or by
o pen access ( O also with signal).
Please note that gathering meaningful scan data can take several seconds.
Preferences (F7 or 'p')
This screen allows you to change all program options such as interface and
level scale parameters, and to save the new settings to the configuration file.
Select a parameter with <up> and <down>, then change the value with <left>
and <right>. Please refer to wavemonrc for an in-depth description of
applicable settings.
Help (F8 or 'h')
This page might show an online-help.