Alvarion SW VERSION 5.1 6.2.8.3.4Minimum Interval Between Atpc Messages, Atpc Parameters in SU

Menus and Parameters

Available values: 4 to 20 (dB).

Default value: 5 (dB) for units operating in the 0.9, 5.4 and 5.8 GHz bands. 8 (dB) for units operating in the 4.9, 5.2 and 5.3 GHz bands.

4.2.6.2.8.3.4Minimum Interval Between ATPC Messages

The Minimum Interval Between ATPC Messages parameter sets the minimal time between consecutive power-up/power-down messages to a specific SU. Setting a low value for this parameter may lead to higher overhead and to an excessive rate of power level changes at the SUs. High values for this parameter increase the time it will take the SUs to reach optimal transmit power level.

Available values: 1 to 3600 seconds.

Default value: 30 seconds.

4.2.6.2.8.3.5ATPC Power Level Step

The ATPC Power Level Step parameter defines the step size to be used by the SUs for incrementing/decrementing the Current Transmit Power after receiving a power-up/power-down message. If the distance between the value of the Current Transmit Power and the desired range is smaller than the step size, the power- up/power-down message will include the specific step value required for this condition.

Valid range: 1-20 (dB)

Default value: 5 (dB)

4.2.6.2.8.4ATPC Parameters in SU

4.2.6.2.8.4.1ATPC Option

The ATPC Option enables or disables the Automatic Transmit Power Control (ATPC) algorithm. The parameter takes effect immediately. However, when changed from Enable to Disable, the transmit power level will remain at the last Current Transmit Power determined by the ATPC algorithm before it was disabled. It will change to the value configured for the Initial Transmit Power parameter only after the next reset or following loss of synchronization.

The default is Enable.

NOTE

The accuracy of the Transmit Power level is typically +/- 1 dB. However, at levels that are 15 dB or more below the maximum supported by the hardware, the accuracy is +/- 3 dB (for information on hardware limitations refer to the Country Codes document). At these levels the use of ATPC may cause significant fluctuations in the power level of the transmitted signal. When operating at such low levels, it is recommended to disable the ATPC Option and to set the Transmit Power parameter to the average Tx Power level before the ATPC was disabled.

Operation and Administration

145