Importance info. the RF engineer should be essentially know it.

#From_Iraq.       م.زيد عمر
#GTMU is the GSM Transmission & Management Unit for BBU in Huawei BTS3900.
Importance info. the RF engineer should be essentially know it.

Indoor ..DRFU. Maximam consist of six part..make cascade to close the redundant port When connect RFU with BBU because each indoor have two part multiplie by 6 part equal to 12 then the bbu have just 6 so make the cascade swap..also the same operation we make it when we make jumper from indoor to the RRU TX OF FIRST DRFU to the second one also the same for RX but if we need it just to received all port shorted to Rx..at last conect EMUA for alarming ..GATM for the GSM Transmission ...

DRFU =
Double Radio Filter Unit

BBU=
Base Band Unit

GTMU=
GSM Transmission & Management Unit for BBU

UPEU=
Universal Power and Environment Interface Unit

BSBC=
Universal BBU Subrack Backplane Type C(2U)

UBFA=
Universal BBU Fan Unit Type A (2 U)

UEIU=
Universal Environment Interface Unit

UELP=
Universal E1/T1 Lighting Protection Unit

CPRI=
Common Protocol Radio Interface

DCDU-01=
Direct Current Distribution Unit

GATM=
GSM Antenna and TMA Control Module

PSU=
Power Supply Unit

MRFU or GRFU -
GSM Radio Filter Unit

MRFU (GSM Radio Filter Unit) is designed based on multicarrier technology RF Filter Unit, a MRFU module maximum complete 6 carriers.

MRFU module is mainly to complete the baseband and RF signal modulation signal demodulation, data processing, shunt, and other functions.

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