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Asymmetric DFS: The default configuration of symmetric operation constrains the link to
operate symmetrically, using the same transmit and receive channels. When in symmetric
mode the slave unit will always follow the master. If the master moves to a new channel the
slave will hop to the same channel. When the Point-to-Point link is configured as an
asymmetric link both the master and slave are free to select the best channel from their own
set of local interference metrics.
Channel Bandwidth (not configurable): shows the value of the variable channel bandwidth
selected.
8.3.7.6
Barring Channels
Channels can only be barred / unbarred by the system administrator from the master
Spectrum Management web page. The barring / unbarring operations are disabled on the
slave web page. If an attempt to bar / unbar a channel is made at the slave, a warning dialog
is generated.
Barring/Unbarring of channels is performed by clicking the appropriate channel on the local or
peer channel spectrum plots on the master web page. Each bar / unbar attempt will be
proceeded by a confirmation dialog. It should be noted that the channel bar will take effect
immediately and is not related to the measurement quantization period.
8.3.7.7
Master and Slave Channel Spectrum Graphics
Spectrum Management presents its computed statistical measurements in a graphical display
on both the master and slave Spectrum Management web page. See Figure 58 for an
example.
The X-axis shows a stylized view of the selectable wireless channels. It is important to note
that adjacent channels on the display have a 10 MHz overlap. The display separates the
display of channels to help the clarity of the resultant display. The axis is labeled using the
channel center frequencies in MHz..
The Y-axis shows the interference power levels from –100 to –40 dBm.
The active channel (channel 1 in Figure 58) is always marked using hatched green and white
lines. The width of the hatching is directly proportional the channel bandwidth spectral
occupancy of the channel.
The individual channel metrics are displayed using a colored bar and an 'I' bar.
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8 Web Page Reference
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