Alvarion BreezeNET B System Manual page 97

each RB searches for the BU in the defined frequencies subset. If the BU was not
found within the waiting time, or if a waiting request was not included in the
message, the RB starts searching for any BU, using the Best BU mechanism if
applicable.
Typically, operators prefer to preserve the original frequency planning and to
avoid moving to a new channel unless we are sure that there is a continuous
radar activity in the original channel. It should be noted that detection of radar
activity does not necessarily indicate a continuous radar activity in the channel.
A channel reuse algorithm enables returning to the original channel under
certain conditions that indicates low radar activity on the channel.
4.2.6.2.4 Frequency Definition Submenu in BU
The Frequency Definition submenu in BU includes the following parameters:
4.2.6.2.4.1 Sub Band Select
This parameter is available only if the country code supports two or more Sub
Bands. For information on how to view the Sub Bands supported by the unit and
the supported parameters' values and options, refer to section
The range depends on the number of Sub Bands supported by the country code.
The default selection is Sub Band 1.
NOTE
For compliance with ETSI regulations, the bandwidth used in the default Sub Band for units in the
5.4 GHz band is 20 MHz. The use of a Sub Band with a 40 MHz bandwidth (Turbo Mode) in the 5.4
GHz band is allowed only if approved by the applicable local regulatory administration.
4.2.6.2.4.2 Frequency
The Frequency parameter defines the transmit/receive frequency when the DFS
Option is not enabled. If the DFS Option is enabled, it sets the initial operational
frequency upon starting the DFS mechanism the first time.
The range depends on the selected Sub Band.
The default is the lowest frequency in the Sub Band.
NOTE
In units operating in the 5.3 GHz band, the following rules must be met for full compliance with FCC
regulations:
1. In units that use a 20 MHz bandwidth:
a. Frequency channel 5260 MHz should not be used.
b. When operating at 5270 MHz, the Transmit Power parameter in the BU, and the Maximum
Tx Power parameter in the RB connected to this BU, should not be set to a value above "17-
Antenna Gain" (The maximum allowed EIRP for 5270 MHz is 17 dBm).
2. In units that use a 40 MHz bandwidth (Turbo Mode): Frequency channels 5270 and 5280 MHz
should not be used.
Operation and Administration
Menus and Parameters
.
4.2.2.4
79