User's Manual

Menus and Parameters
Manual Revision 1.0
4-81
Burst Mode
Burst mode provides an increased throughput by reducing the overhead
associated with transmissions in the wireless media. In a burst
transmission the inter-frame spacing is reduced and data frames are
transmitted without any contention period.
The Burst Mode is available only if Burst Mode is supported by the Sub
Band in use. For information on how to view the Sub Bands supported
by the unit and the supported parameters’ values and options, refer to
Show Country Dependent Parameters
on page 4-9.
In AU, the Burst Mode option will be “blocked” upon trying to enable
Burst Mode when the DFS Option is enabled or when using WEP for
data encryption. In SU, the Burst Mode option will be “blocked” upon
trying to enable when using WEP for data encryption.
Burst Mode Option
The Burst Mode Option enables or disables the Burst Mode operation.
The default is Enable.
NOTE
When Burst Mode Option is enabled, the SW Retry feature of the Adaptive Modulation
Algorithm is disabled. Otherwise it is enabled.
Burst Mode Time Interval
The Burst Mode Time Interval defines the burst size, which is the time
in which data frames are sent immediately without contending for the
wireless medium.
The range is 1 to the value of the Maximum Burst Duration defined for
the Sub Band.
The default is 5 milliseconds or the value of Maximum Burst Duration
defined for the Sub Band (the lower of the two values).
Adaptive Modulation Algorithm (Multi Rate)
The Adaptive Modulation Algorithm enables adapting the modulation
level of transmitted data to the prevailing conditions of the applicable
radio link. The algorithm provides Access Units with simultaneous,
adaptive support for multiple Subscriber Units at different modulation
levels, as transmission’s modulation level decisions are made separately
for each associated SU.