User Manual

DELTANODE FIBER DAS MANUAL
©DeltaNode Solutions 2012
10
Revision 12-03
Specifications
Parameter
Input voltage
28
VDC
Power connector
Molex
10
Pin
Ethernet connector
RJ45
Weight (without modules)
2,5
kg
Temperature range
Operational
0-45
°C
Width
16U
19
Inch
Height
3
U
Depth
300
Mm
Maximum number of modules supported
PSU
4
Pcs
BIU
8
Pcs
FOI
16
Pcs
Temperature range
0-45
°C
2.1.2 BIU – The Base Station Interface
The BIU is the interface between the operator’s base station and
the Fiber-DAS system. This module has several RF connectors on
the front panel and it contains duplex filters (optional) or
separate uplink/downlink paths which can be chosen depending
on the needs for the connection to the base station. In most
cases the duplexed version with a combined DL/UL port is used.
Functional description
In the duplexed version there are UL test connectors present
(SMA) that can be used to monitor the signal out from the BIU.
The version without duplex filters has the test connectors
replaced by UL connectors and the normally combined DL/UL
connectors are replaced by DL only connectors.
There are two separate RF ports in the BIU and the BIU needs to
be ordered for the specific frequency bands it will serve. The two
paths in the BIU cannot have different frequencies; a GSM 900 BIU will have two GSM 900 paths and
cannot be combined with e.g. an 1800 path, this requires a second BIU card to be inserted.
The BIU have four QMA ports that is normally used to connect it to the POI. There are two uplink (input)
ports and two downlink (output, Tx) ports. These two are separate port, the isolation between DL 1 and
DL 2 is > 50 dB and so is the isolation between the UL 1 and UL 2 ports.
The ports towards the RBS are of SMA female type and the ports towards the POI are of QMA female
type. RF patch cables are used to patch the DL and UL paths to the right place in the POI.
There is also an alarm port of the BIU which in the future can be used to connect external alarms but for
the time being is not in use. This is a DB9 female connector.
Figure 2: Base station interface