M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3 Board
Issue 01 (2006-11-18)
Huawei Technologies Proprietary
3-9
ID
Color
Meaning
Indication
LNA
Red
LNA warning indicator
OFF: No alarm
ON: LNA alarm
lists detailed information about ports on CDU front panel.
Table 3-5
CDU ports
ID
Connector
Type
Function
TX/RX-ANT
N (Female)
RF signal transmitting/receiving antenna port
MS/TX-TEST SMA
(Female) Transmitting/receiving test port
TX1
N (Female)
The first transmitting signal input port (maximum
power: 60 W)
TX2
N (Female)
The second transmitting signal input port (maximum
power: 60 W)
RXD-ANT
N (Female)
RF signal diversity receiving antenna port
RXD-OUT
SMA (Female)
Diversity receiving output
RX1–4
SMA
The first RX divider output port 1–4
RXM-TEST
SMA (Female)
Main receiving test port
RX5–8
SMA (Female)
The second RX divider output port 5–8
RXD-TEST SMA
(Female)
Diversity
receiving signal test port
HL-OUT
SMA (Female)
Main receiving high level output. When connected to
HL-IN, it can realize 1-to-8 output
HL-IN
SMA (Female)
High level input, RX5–8 input
TX-COM
N (Female)
Combiner output
TX-DUP
N (Female)
Duplexer TX input
CDU-BUS
DB15
Control bus port
DC-IN
DC power input +26V DC input, allowed voltage fluctuation range:
!
20%
The internal and external conductors of "TX/RX_ANT", "RXD_ANT" supply feed to the
TMA. The feeding voltage is +12 V DC. Be careful not to short-circuit the internal and
external conductors.