nsn antenna sharing with rx div

Antenna Sharing Scenario

Same Antenna is used for 2g and 3g in Same Band.

Abdul Hameed Althaf +966503278654 BTS & SiteSolutions Support MEA

3G

2G

1

1

2

2

No MHA used

The configuration for a single sector is as shown. The Blue and Red Cables are readymade Rx Diversity Cables between RF Modules

Case1


3G ANT1 Settings

3G ANT2 Settings

FlexiWCDMA BTS Commissioning


2G ANT1 Settings

2G ANT2 Settings

FlexiMR BTS Commissioning


3G

2G

1

1

2

2

No MHA used

Case2

MHA

MHA in Use


OLD way

3G ANT1 Settings

3G ANT2 Settings

FlexiWCDMA BTS Commissioning


2G ANT1 Settings

2G ANT2 Settings

FlexiMR BTS Commissioning


Reason for Additional Antenna gain in Commissioning file while using Rx DivSharing.

In the RF Module the Rx Signal that is available at the Rx01 port of the RFM is already amplified (+29db) in case of most RF Module Variants. Hence we have a diff of 29db between the Ant1RxM and Ant2RxDiv(in this case-supplied from Rx01 of other RFModule) & we compensate this by Informing the SW that there is a gain already in the ANT2 Port ! Reference: TS-2GBTS-DOC-0065.Rx Div Sharing b/w F.EDGEBTS & F.MR BTS EDGE. 5 Apr 2011 TS-3GBTS-SW-0144-I2 Rx Div Sharing with FleIEDGE and FLexiWCDMA 10 Jun 2011 TSN-3GBTS-SW-0181 3G-3G Rx Div sharing with F.MR WCDMA BTS.02 Jul 2013


nsn antenna sharing with rx div

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