Motorola PTP 300 Series User Manual page 133

Link Symmetry
(Master only) Values of "Adaptive", "3 to 1", "1 to 1" and "1 to 3" can be selected. The
adaptive setting allows link symmetry to vary dynamically in response to offered traffic load.
The remaining values select three options for fixed division between transmit and receive time
in the TDD frame of the master ODU. The first number in the ratio represents the time allowed
for the transmit direction and the second number represents the time allowed for the receive
direction.
The appropriate matching Link Symmetry is set at the slave ODU automatically. For example,
if Link Symmetry is configured as "3 to 1" at the master ODU, then the slave ODU will be set
automatically as "1 to 3". In this example, the master-slave direction has triple the capacity of
the slave-master direction.
Link Symmetry is subject to the following restrictions:
"Adaptive" is not supported in regions where radar avoidance is in use.
"Adaptive" is not supported when link optimization is set to "TDM".
"Adaptive" is not supported in 5 MHz channel bandwidth.
"3 to 1" and "1 to 3" are not supported in 5 MHz channel bandwidth.
"3 to 1" and "1 to 3" are not supported when E1/T1 services are enabled.
Spectrum Management Control
Is used to configure the PTP 300 Series Bridge's Spectrum Management features, see
Section 7.9 "Spectrum Management" for more details. In regions that do not mandate DFS
(Radar Detection), the Spectrum Management Control options are "i-DFS" and "Fixed
Frequency". In regions that mandate DFS (Radar Detection), the Spectrum Management
Control options are "DFS" and "DFS with i-DFS".
Lower Center Frequency
Not displayed when Spectrum Management Control is set to "Fixed Frequency". The software
for the PTP 300 Series Bridge allows a user to optionally adjust the channel center
frequencies. Changing the Lower Center Frequency attribute causes all channel center
frequencies to be offset. It effectively slides the channelization up or down.
CAUTION
The lower center frequency attribute must be configured to the same value for both
the master and slave. Failure to do so will cause the wireless link to fail
reestablishment. The only way to recover from this situation is to modify the Lower
Center Frequency attribute so that they are identical on both the master and slave
unit.
Default Raster
If this is set to "On", the list of options presented in the fixed Tx frequency box is limited by the
default raster.
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