WALKair 1000

WALKair 1000™ Technical Note Enhanced New BS-BU Calibration for Version 8.1

P/N: 213811 July 2004

New Enhanced BS-BU Calibration for Version 8.1

© Copyright 2003 Alvarion Ltd (“Alvarion”). All rights reserved. The material contained herein is proprietary, privileged, and confidential. No disclosure thereof shall be made to third parties without the express written permission of Alvarion. Alvarion reserves the right to alter the equipment specifications and descriptions in this publication without prior notice. No part of this publication shall be deemed to be part of any contract or warranty unless specifically incorporated by reference into such contract or warrant. Alvarion, BreezeCOM, WALKair, WALKnet, BreezeNET, BreezeMANAGE, BreezeACCESS, BreezeLINK, BreezePHONE, MGW, eMGW and/or other products and/or services referenced here in are either registered trademarks, trademarks or service marks of Alvarion. All other names are or may be the trademarks of their respective owners. The content herein is subject to change without further notice.

Enhanced New BS-BU Calibration for Version 8.0 ii

Contents Introduction.......................................................................................................... 1 Enhanced Calibration Scenarios ........................................................................... 2 Addition of a Version 8.1 BS-BU to a pre- Version 8.1 WALKair 1000 Sector......... 2 Software Upgrade of an existing WALKair 1000 Sector to Version 8.1.................... 2 Replacement of a pre - Version 8.1 BS-BU with a Version 8.1 BS-BU.................... 3 Applying Enhanced Calibration............................................................................. 3

New Enhanced BS-BU Calibration for Version 8.1 Introduction For WALKair 1000 10.5 GHz systems, a flat response is sometimes observed for the output power against frequency curve. The flatness is most pronounced for wide frequency spans (not adjacent frequencies). This phenomenon occurs only on the downlink, and the actual output power can be either slightly higher or lower than the configured output power. WALKair 1000 Version 8.1 includes enhanced calibration for the BS-BU in order to prevent such output power variations.

New Enhanced BS-BU Calibration for Version 8.1

Enhanced Calibration Scenarios The following typical sector scenarios illustrate the implications of the enhanced BS-BU calibration feature: Addition of a Version 8.1 BS-BU to a pre-Version 8.1 WALKair 1000 Sector Software upgrade of an existing WALKair 1000 Sector to Version 8.1 Replacement of a pre-Version 8.1 BS-BU with a Version 8.1 BS-BU

Addition of a Version 8.1 BS-BU to a pre-Version 8.1 WALKair 1000 Sector If a Version 8.0 BS-BU is added to an existing sector, enhanced BS-BU calibration can be applied without influencing other BS-BU in the sector.

Software Upgrade of an existing WALKair 1000 Sector to Version 8.1 If an existing WALKair 1000 sector is upgraded to Version 8.1, a change in transmission output after enhanced calibration may influence radioplanning parameters for high-density deployments. However, if unwanted changes occur after applying enhanced BS-BU calibration, the feature parameter may be reset to the original configuration. The calibration parameter is set by default to “disable” after upgrading the unit to version 8.1. In this case, the upgrade does not change the current settings.

Enhanced New BS-BU Calibration for Version 8.0 2

New Enhanced BS-BU Calibration for Version 8.1

Replacement of a pre-Version 8.1 BS-BU with a Version 8.1 BS-BU If a pre-Version 8.1 BS-BU is replaced with a Version 8.1 BS-BU (so that there are at least two versions operating in the sector), a change in transmission output after enhanced BS-BU calibration may influence radio-planning parameters for high-density deployments. However, if unwanted changes occur when applying enhanced BS-BU calibration, the feature may be reset to the original configuration.

Applying Enhanced Calibration To apply enhanced BS-BU calibration via the LCI: 1. Connect the BS-BU to a monitor via the LCI connector. 2. In the LCI Maintenance Menu, select option 5 (Modem Maintenance Menu), and set the “Set RFU New Calibration Status” parameter to Enable (the default value is Disable).

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