USER MANUAL FOR RA-7E00
ENU STATUS : 1-0-0
Copyright - refer to title page
Page 30
The recommended input power is 0~+10dBm, users should calculate BTS signal source input loss
accurately to make sure it is in coverage range.
3.5.2.2. MU connects with fibre optic distribution box
MU is connected with fibre optic distribution box via fiber cables; the connector is SC/APC type. The
connection diagram is shown in the below figure.
PWR RUN ALM
MODEM
BTS_ALM
LAN
OP_A
OP_A
OP_A
OP_A
OP_A
OP_A
Comba
OP_A
OP_A
Fibre Optic Distribution Box
1900MHz
800MHz
Figure 24: Fibre Optic Port Connection Diagram
Note: The length of optical fiber should be larger than the distance between MU and fibre optic distribution
box due to some cable specification requirements.
3.5.3 BTS ALARM CONNECTION
The equipment alarms can be signaled to the BTS via voltage-free relay contacts. The voltage-free relay
connections are connected to the DB-9 port
“BTS_ALAM” located on the MU. The following figure and
table shows the pin allocation and definition.
1
2
4
3
5
6
7
9
8
BTS_OPEN
BTS_CLOSE
BTS_ COM
Figure 25
: Pins Allocation for “BTS_ALM” Port
