Antenna TX/RX configuration

[srilasitha]

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

[sabila]

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

[kevin_h811]

Hi,

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

Regards//

[srilasitha]

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

[sabila]

as far as i know
it give reduction to coverage