Proxim Wireless Corporation PROXMB92 사용자 설명서
Basic Configuration
Tsunami QB-8100 Series (100 Mbps/5 Mbps Models) Installation and Management Guide
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If ACS is disabled, during initialization, the device selects the Preferred Channel to be the operational channel. If ACS is
enabled, during initialization, the device scans all the channels in the configured frequency domain and selects the channel
with the best RSSI to be the operational channel.
enabled, during initialization, the device scans all the channels in the configured frequency domain and selects the channel
with the best RSSI to be the operational channel.
Once the operating channel is selected, the device scans the channel for radar presence for a duration of Channel Wait Time.
If no radar is detected, the device starts operating in that channel. If radar is detected, the channel is blacklisted for 30
minutes and a different channel is selected. To select the next operational channel, the device scans all non-blacklisted
channels and selects the channel with best RSSI.
If no radar is detected, the device starts operating in that channel. If radar is detected, the channel is blacklisted for 30
minutes and a different channel is selected. To select the next operational channel, the device scans all non-blacklisted
channels and selects the channel with best RSSI.
At any point of time, if Radar is detected on the current operating channel, the device blacklists that channel and scans all
non-blacklisted channels and selects the channel with best RSSI.
non-blacklisted channels and selects the channel with best RSSI.
NOTE:
Scanning is performed only on the frequencies allowed in the regulatory domain of the frequency/band
selected when it is required for radar detection and avoidance.
End Point B
When not connected to the End Point A, the End Point B scans continuously for all the channels in the configured Frequency
Domain for the presence of End Point A. If suitable End Point A is found in a channel, the End Point B tries to connect to it.
Domain for the presence of End Point A. If suitable End Point A is found in a channel, the End Point B tries to connect to it.
NOTE:
Since the device may need to scan for radar on multiple channels, you must allow a sufficient amount of time
for the units to start up. This is considerably longer than when the device is not using DFS. This is expected behavior.
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.
results in radar interference.
For detailed information on DFS, refer to
.
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.
level for the operating frequency can be found in the event log of the unit’s embedded software.
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.
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.
NOTES:
•
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.
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.
•
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.
selected power for all data rates, so you must look up the relevant data rate to determine the actual power level.
•
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.
your device beyond the maximum the radio allows for your frequency and data rate.
3.4 Pairing the End Points or setting up a QB Link
If a QB-8100 link product is purchased, the devices will come with a factory pre-configuration for forming a secure link out of
the box. If you want to form a link manually, the following parameters have to be configured with the same values on both
End Points for forming a link.
the box. If you want to form a link manually, the following parameters have to be configured with the same values on both
End Points for forming a link.