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Thread: Antenna TX/RX configuration

  1. #1
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    Default Antenna TX/RX configuration

    While checking configuration of antennas and DRFUs in huawei system I got this problem

    According to my understanding normal SB outdoor antenna 2 ports is as follows

    + TX /RX
    - RX

    but in the 2 DRFU configuration for one cell we connect two antenna feeder for each DRFU and connect 2 DRFUs with interconnection TX & RX cables.

    this configuration coverage will still be present even if the TX/RX port connected DRFU is faulty

    With the experience i have observed when antenna + and - ports are incorrectly connected to the DRFUs coverage is lower

    Now I list down the problems I got

    1. Does 2 DRFU configuration uses both antenna feeders for TX
    2. if does RX port connected DRFU TRXs has lower coverage compared to other
    3. How does RX diversity achieved with this configuration

    Experts please respond

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  3. #2
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    Default Re: Antenna TX/RX configuration

    the configuration based on your network config

    Set this parameter according to the actual RF connections. For details, see Setting Antenna Attributes.

    The DRRU, GRRU, and MRRU support the following TX/RX modes: Single Feeder (1TX + 1RX), Single Feeder (1TX + 2RX), Double Feeder (2TX + 2RX), Double Feeder (2TX + 4RX), Double Feeder (1TX + 1RX), and Double Feeder (1TX + 2RX).
    The DRFU supports the following TX/RX modes: Single Feeder (1TX + 1RX), Single Feeder (1TX + 2RX), Double Feeder (2TX + 2RX), Double Feeder (2TX + 4RX), Double Feeder (1TX + 1RX), and Double Feeder (1TX + 2RX).
    The GRFU and MRFU support the following TX/RX modes: Single Feeder (1TX + 1RX), Single Feeder (1TX + 2RX), Double Feeder (2TX + 2RX), Double Feeder (2TX + 4RX), Double Feeder (1TX + 1RX), and Double Feeder (1TX + 2RX).

    may u can see this pict
    Attached Images Attached Images

  4. #3
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    Default Re: Antenna TX/RX configuration

    Hi,

    Is this BTS3900?What is the config, Standard S444?

    Regards//

  5. #4
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    Default Re: Antenna TX/RX configuration

    thanks for the detailed response

    How about the outdoor normal antenna ? Does it has coverage reduction in the RX port connected DRFU when for 2TX/4RX is used

  6. #5
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    Default Re: Antenna TX/RX configuration

    as far as i know
    it give reduction to coverage

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