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Chapter 4 - Operation and Administration
NOTE
For Non-Line-Of-Sight (NLOS) links using refractions, the cell distance should be higher
than the line-of-sight distance. Typically a 10% margin is a good estimate for the
increase in distance due to the NLOS operation.
The basic time element (symbol) used by the system is 68
microseconds. This symbol size is translated to a round trip delay of
approximately 20 km, or a cell radius of 10 km. Thus, it is
recommended to set the Maximum Cell Radius using a resolution of
10 km: the actual timing of the system is the same for any cell
radius higher than N*10 km and lower than or equal to (N+1)*10.
NOTE
An SU located at a distance higher than the Maximum Cell Radius will be rejected
during the network entry process.
The values range is from 10 to 100 km. Use 10 km increments (10,
20, 30, ....100).
The default is 20 km.
Phy Parameters
The AU Phy Parameters menu includes the following options:
Show
Select this option to view the current values/options of the Phy
(Physical Layer) parameters. The radio band of the ODU is also
displayed when an AU-IDU connected to an AU-ODU is installed in the
slot.
Update
Select this option to update any of the Phy parameters. The Phy
parameters are:
Bandwidth
The frequency bandwidth used by the radio. A change in the
Bandwidth parameter will take effect only after resetting the
AU/µBST.
The available options are:
1 – 1.75 MHz
2 – 3.5 MHz
The default is 3.5 MHz.
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BreezeMAX System Manual
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