Enable or disable Channel Shifting
Select a Wireless Frequency on NanoStation
M2
Extension Channel
Channel Scan list selection on NanoStation M2,country:Chile
Output power and Obey regulatory power
Wireless Data rate
Drawback: It will reduce throughput proportional to the channel size reduction. So just as turbo mode (40MHz) increases possible
speeds by 2x, half spectrum channel (10MHz), will decrease possible speeds by 2x.
Channel Shifting: enables special channels with a frequency offset regarding standard
802.11b/g/n and 802.11a channels. This is a proprietary Ubiquiti developed feature. While
802.11 networks have standard channels, e.g. Channel 36 (5180MHz), Channel 40
(5200MHz), etc. with intervals of 5MHz; channel shifting will allow operation of new
non-802.11 channels offset from the standard channels. All the channels can be shifted
from the default central channel frequency in intervals of 5 MHz (in 802.11na) or 2/3 MHz
(in 802.11bgn).
The benefits of these options are private networking and inherent security. Using channel-shifting, networks can instantly become
invisible to the millions of Wi-Fi devices in the world.
Frequency, MHz: select the wireless channel while operating in Access Point mode. Multiple
frequency channels are available to avoid interference between nearby access points. The
channel list varies depending on the selected country code, IEEE 802.11 mode and Channel
Spectrum Width and Channel Shifting option. Now AirOS 5.3 incorporates the “Auto” option
that selects the best channel, based on current utilization and noise, when the devices is
initialized or restarted. Once the channel is selected, it will remain on that channel until the
radio is rebooted, or additional changes are made.
Extension Channel: (Only applicable to AP or AP WDS, and 40MHz channel width) indicates
the use of channel bonding that allows the AirMax network to use two channels at once. Using
two channels improves the performance of the Wi-Fi connection. It is automatically selected
by the system.
Channel Scan List, MHz: This will confine scanning only to the selected channels (applicable
to Station and Station WDS mode only). The benefits of this are faster scanning as well as
filtering out unwanted AP's in the results. Site Survey tool will look for the Access Points in
selected channels only.
Frequency List, MHz: when this option is enabled, it can be used for two proposes: firstly
with the “Auto” frequency selected, the listed frequencies will be scanned and analyzed
(values can be typed in manually, separated by commas, or picking channels through the “Edit” option). Secondly with the feature
enabled and AirSelect running, AirSelect will use only channels specified in the Frequency List.
Channel list management for the selected IEEE 802.11 mode and specified
Channel Spectrum Width can be enabled by selecting the Enabled option. There
are two ways to set the Channel Scan List - enumerating the required channels
(separated by comma) in the input field or using the selection options in
Channel Scan List window, which is activated using the Edit button. Site Survey
tool will look for the Access Points in selected channels only if the scan or site
survey operation is performed in Station mode.
Antenna Gain:specifies the gain of the antenna installed in the AP (applies only
to devices with external antenna connector, such as Rocket and Bullet). When
“Obey Regulatory Rules” is enabled, the antenna gain calculates the TX power
backoff needed to remain in compliance with local regulations. This feature is
complementary to the “Cable Loss” feature; and both affect the TX power of the
unit.
Cable Loss: When “Obey Regulatory Rules” is enabled, the Cable Loss affects
the TX power of the unit. In case you have high amounts of cables loss, the higher TX power may be increased while being in compliance
with the maximum TX power allowed by the local authority. This feature is complementary to the “Antenna Gain” feature.
Output Power: This will configure the maximum average transmit output power
(in dBm) of the wireless device. The output power at which wireless module
transmits data can be specified using the slider. When entering output power
value manually, the slider position will change according to the entered value.
The transmit power level maximum is limited according to the country regulations. If the AirOS v5.3 based device has an internal
antenna (i.e. NanoStation M/LocoStation M), Output Power is the output power delivered to the internal antenna.
Obey regulatory Rules option must remain enabled while it will force the transmit output power to be compliant with the regulations of
the selected country. In this case, it will not be possible to set equivalent isotropic radiated power (EIRP) above the amount allowed per
regulatory domain (different maximum output power levels and antenna gains are allowed for each IEEE 802.11a/b/g/n regulatory
domain thus country). For more regulatory information, please consult 802.11 compliance guide (http://www.ubnt.com
/wiki/RF_Compliance) .
Max Data Rate, Mbps: This defines the data rate (in Mbps) at which the device
should transmit wireless packets. You can fix a specific data rate between MCS 0
and MCS 7 (or MCS15 for 2x2 chains devices) also. It is recommended to use
automatic option, especially if you are having trouble getting connected or losing
data at a higher rate. In this case, the device will use the lower data rates automatically.. If you select 20MHz Channel Spectrum width
the maximum data rate is MCS7 (65Mbps) or MCS15 (130Mbps). If you select 40MHz Channel Spectrum width the maximum data rate is
AirOS 5.3 - Ubiquiti Wiki
http://www.ubnt.com/wiki/AirOS_5.3
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