User's Manual

Menus and Parameters
Manual Revision 1.0
4-59
Table 4-9: Recommended Maximum Modulation Level
SNR Maximum Modulation Level
SNR> 22 dB 7
18 dB< SNR < 22 dB 6
14 dB < SNR < 18 dB 5
11 dB < SNR < 14 dB 4
9 dB < SNR < 11 dB 3
7 dB < SNR < 9 dB 2
6 dB<SNR < 7 dB 1
Average SNR Memory Factor
The SNR Memory Factor defines the weight of history (value of last
calculated average SNR) in the formula used for calculating the current
average SNR for received data frames. This average SNR is used by the
ATPC algorithm in the BU and is also included in the Adaptive
Modulation Algorithm information messages transmitted by the BU and
the RB. The higher the value of this parameter, the higher is the weight
of history in the formula.
Available values: -1 to 32. -1 is for no weight for history, meaning that
average SNR equals the last measured SNR.
Default value: 5
Number of HW Retries
The Number of HW Retries parameter defines the maximum number of
times that an unacknowledged packet is retransmitted. When the
Adaptive Modulation Algorithm is disabled, or when it is enabled but
the Software Retry Support is disabled, a frame will be dropped when
the number of unsuccessful retransmissions reaches this value. For
details on the effect of this parameter when both the Adaptive
Modulation Algorithm and the Software Retry Support options are
enabled, refer to
Adaptive Modulation Algorithm, on page 4-60.
The available values range is from 1 to 15.
The default value is 10.