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Menus and Parameters
Operation and Administration
133
Before ceasing transmission on the frequency where radar signals had been
detected, the AU sends a special disassociation message to its associated SUs.
This message includes an indication whether the SUs should wait for this AU. If
the SUs should wait, the message includes also the waiting time. During this
time each SU searches for the AU in the defined frequencies subset. If the AU was
not found within the waiting time, or if a waiting request was not included in the
message, the SU starts searching for any AU, using the Best AU mechanism if
applicable.
Typically, operators prefer to preserve the original frequency planning and to
avoid moving to a new channel unless they 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 AU
The Frequency Definition submenu in AU 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 4.2.2.4.
The range depends on the number of Sub-Bands supported by the country code.
The default selection is Sub-Band 1.
4.2.6.2.4.2 Frequency
The Frequency parameter defines the transmit/receive frequency when DFS is
not enabled. If DFS is enabled, it sets the initial operational frequency upon
starting the DFS mechanism for the first time.
The range depends on the selected Sub-Band.
The default is the lowest frequency in the Sub-Band.
NOTE 1 (Japan 4.9 GHz, 10 MHz Bandwidth):
In BreezeACCESS units operating in the 4.9 GHz Japan band (not B&B point-to-
point) with a 10 MHz bandwidth, the following rules must be met for full
compliance with regulations:
1. When operating at 4945 MHz, the Transmit Power parameter in the AU
should not be set to a value above 11 dBm. The Maximum Transmit Power of
the SU should not be set to a value above 10 dBm.