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Basic Configuration
Tsunami QB-8100 Series (100 Mbps/5 Mbps Models) Installation and Management Guide
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3.1 Country and Related Settings
The unit’s Advanced Configuration window provides a frequency domain field that automatically provides the allowed
bandwidth and frequencies for the selected country.
bandwidth and frequencies for the selected country.
Units sold in the United States are pre-configured to scan and display only the outdoor frequencies permitted by the FCC. No
other country can be configured. Units sold outside of the United States support the selection of a country by the professional
installer using frequency domain.
other country can be configured. Units sold outside of the United States support the selection of a country by the professional
installer using frequency domain.
NOTE:
Non-US installers should not add an antenna system until the Country is selected, the device is rebooted, and
the proper power level is configured. The Transmit Power Control (TPC) feature can be used to reduce the power
when required.
when required.
The Dynamic Frequency Selection (DFS) feature is enabled automatically when you choose a country and band that require it.
Refer to
Refer to
for information on which bands need DFS.
3.2 Dynamic Frequency Selection (DFS)
The Tsunami QB-8100 supports Dynamic Frequency Selection (DFS) for FCC, IC, and ETSI regulatory domains per FCC Part 15
Rules for U-NII devices, IC RSS-210, and ETSI EN 301-893 regulations, respectively. These rules and regulations require that the
devices operating in the 5 GHz band must use DFS to prevent interference with radar systems.
Rules for U-NII devices, IC RSS-210, and ETSI EN 301-893 regulations, respectively. These rules and regulations require that the
devices operating in the 5 GHz band must use DFS to prevent interference with radar systems.
DFS is required for three purposes:
1. Radar avoidance both at startup and while operational. To meet these requirements, the End Point A scans
available frequencies at startup. If a DFS-enabled channel is busy or occupied with radar, the system will blacklist the
channel for a period of 30 minutes in accordance with FCC, IC, and ETSI regulations. Once fully operational on a
frequency, the End Point A actively monitors the occupied frequency. If interference is detected, the End Point A
blacklists the channel, logs a message and rescans to find a new frequency that is not busy and is free of radar
interference.
channel for a period of 30 minutes in accordance with FCC, IC, and ETSI regulations. Once fully operational on a
frequency, the End Point A actively monitors the occupied frequency. If interference is detected, the End Point A
blacklists the channel, logs a message and rescans to find a new frequency that is not busy and is free of radar
interference.
Radar detection is performed by both End Point A and End Point B. When an End Point B is set to a country/band in
which DFS is used, it passively scans all available channels upon startup looking for a End Point A that best matches its
connection criteria (such as End Point A Node System Name, Network Name, and Shared Secret). The End Point B
connects to the End Point A automatically on whatever frequency the End Point A has selected. Because of this
procedure, it is best to set up the End Point A and have it fully operational before installing the End Point B, although
this is not required. If an End Point A rescans because of radar interference, the End Point B loses its wireless link. The
End Point B waits for 30 seconds and if it finds that it could not receive the End Point A in this amount of time, it
rescans the available frequencies for an available End Point A.
which DFS is used, it passively scans all available channels upon startup looking for a End Point A that best matches its
connection criteria (such as End Point A Node System Name, Network Name, and Shared Secret). The End Point B
connects to the End Point A automatically on whatever frequency the End Point A has selected. Because of this
procedure, it is best to set up the End Point A and have it fully operational before installing the End Point B, although
this is not required. If an End Point A rescans because of radar interference, the End Point B loses its wireless link. The
End Point B waits for 30 seconds and if it finds that it could not receive the End Point A in this amount of time, it
rescans the available frequencies for an available End Point A.
2. Guarantee the efficient use of available frequencies by all devices in a certain area. To meet this requirement,
the End Point A scans each available frequency upon startup and selects a frequency based upon the least amount of
noise and interference detected. This lets multiple devices operate in the same area with limited interference.
noise and interference detected. This lets multiple devices operate in the same area with limited interference.
3. Uniform Channel Spreading. To meet this requirement, the End Point A randomly selects operating channel from
the available channels with least interference. If the channel is occupied by radar, the device blacklists that channel
and scans other available channels for the one with least interference. This implements the Uniform Channel
Spreading requirement by automatically selecting the channel with least interference.
and scans other available channels for the one with least interference. This implements the Uniform Channel
Spreading requirement by automatically selecting the channel with least interference.
NOTE:
If the Preferred Channel is configured, the device begins by scanning that channel. This allows the installer to
manually select a channel with least interference from a channel plan.
End Point A
Dynamic Frequency Selection (DFS) is enabled automatically based on the selected frequency domain. The device selects a
channel to operate as follows:
channel to operate as follows: