3 Board
M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3-26
Huawei Technologies Proprietary
Issue 01 (2006-11-18)
ID
Color Meaning
Indication
LNA
Red
LNA Warning indicator
OFF: No alarm
ON: LNA alarm
lists detailed information about ports on EDU front panel.
Table 3-15
EDU ports
ID
Connector
Type
Function
TX/RX-ANT A
N
RF signal transmitting/receiving antenna port A
TX/RX-ANT B
N
RF signal transmitting/receiving antenna port B
MS/TX-TEST A
SMA
Transmitting/receiving test port A
MS/TX-TEST A
SMA
Transmitting/receiving test port B
TXA
N
The first transmitting signal input (maximum power:
100W)
TXB
N
The second transmitting signal input (maximum
power: 100W)
RXA1
SMA
First divider output port of receiving channel A
RXA2 SMA
Second
divider
output port of receiving channel A
RXB1
SMA
First divider output port of receiving channel B
RXB2
SMA
Second divider output port of receiving channel B
EDU-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.
3.6.4 Rear Panel
Two major types of EDU rear panels are the following:
!
EDU (type A)
!
EDU (type B)