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Phy Parameters
The AU Phy Parameters menu includes the following options:
Show
Select this option to view the current value/option of the Phy (Physical
Layer) parameters.
Update
Select this option to update any of the Phy parameters. The Phy
parameters are:
Bandwidth (MHz)
The frequency bandwidth used by the radio. A change in the Bandwidth
parameter will take effect only after resetting the SU.
The available options are:
1 – 1.75 MHz
2 – 3.5 MHz
The default is 3.5 MHz.
Uplink (Tx) Frequency (MHz)
The frequency used in the uplink (from SU to AU). The frequency in the
downlink (AU to SU) is the Uplink frequency plus 100 MHz.
A change in the Uplink Frequency parameter will take effect only after
resetting the SU.
The resolution is in steps of 0.125 MHz. The available values depend on
the Bandwidth, as follows:
For a Bandwidth of 3.5MHz: 3401.25 to 3498.25.
For a Bandwidth of 1.75MHz: 3400.375 to 3499.125.
The default is 3451.75 MHz.
ATPC and Multirate Parameters
The ATPC and Multirate mechanism are controlled by the AU (except to
the option to temporarily control them locally at the SU for testing
purposes). The Show Multirate and ATPC Status and Parameters option
enables viewing the current status of the applicable parameters. The Set
Rates option can be used to set uplink and downlink rates per SU only
when Multirate is disabled.
Manual Revision 1.0
SU Menu
4-57
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