Tsunami MP-8100 Installation and Management Guide 38
The Startup time is within four minutes if no radar is detected, but up to one minute is added for every selected channel that
results in radar interference.
For detailed information on DFS, refer to Frequency Domains and Channels.
3.3 Transmit Power Control
Transmit Power Control is a manual configuration selection to reduce the unit’s output power. The maximum output power
level for the operating frequency can be found in the event log of the unit’s embedded software.
ATPC (Automatic Transmit Power Control) is a feature to automatically adapt transmit power when the quality of the link is
more than sufficient to maintain a good communication with reduced transmit power. This feature is required for FCC DFS. It
works by monitoring the quality of the link and reducing the output power of the radio by up to 6 dB when good link quality
can still be achieved. When link quality reduces, the output power is automatically increased up to the original power level to
maintain a good link. For a full discussion of DFS, see Dynamic Frequency Selection (DFS).
By default, the device transmits at the maximum output power that the radio can sustain for data rate and frequency
selected. However, with Transmit Power Control (TPC), you can adjust the output power of the device to a lower level in order
to reduce interference to neighboring devices or to use a higher gain antenna without violating the maximum radiated
output power allowed for your country/band. Also, some countries that require DFS also require the transmit power to be set
to a 6 dB lower value than the maximum allowed EIRP when link quality permits, as part of the DFS requirements.
NOTE: When the system is set to transmit at the maximum power, professional installers must ensure that the
maximum EIRP limit is not exceeded. To achieve this, they may have to add attenuation between the device and the
antenna when a high gain antenna is used.
NOTE: You can see your unit’s current output power for the selected frequency in the event log. The event log shows
the selected power for all data rates, so you must look up the relevant data rate to determine the actual power level.
NOTE: This feature lets you only to decrease your the output power of the device; you cannot increase the output
power of your device beyond the maximum the radio allows for your frequency and data rate.
3.4 Setting Up a Link Between BSU and SU
The following parameters have to be configured with the same values on both BSU and SU or forming a link.
• Network Name
• Network Secret
• Encryption (when used)
• Frequency Channel (when available)
• Channel Bandwidth
• Data Rate
See the description of these parameters and how to configure them in Advanced Configuration.
3.5 Virtual Local Area Networks (VLANs)
Virtual Local Area Networks (VLANs) are logical groupings of network hosts. Defined by software settings, other VLAN
members or resources appear (to connected hosts) to be on the same physical segment, no matter where they are attached
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