User's Manual

DELTANODE USER MANUAL
©DeltaNode Solutions 2015
10
Revision 15-01
The frame also contains fans used to ventilate the units housed in the frame. These are high quality
fans that have a high MTBF.
3.3.2 BIU – The Base Station Interface
The BIU is the interface used 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.
LED behavior
The unit has two LEDs located on the front panel. One is the power on LED (green) and the other is
the alarm LED (red). Both LEDs can indicate a number of states by different flashing behaviors.
Using it as a splitter means you connect the combined signal to the COMMON port and you can then
receive 8 ports with equal signal strengths on ports 1-8 (minus insertion loss).
3.3.3 FOI – The Fiber Optic Interface unit
The FOI is the unit responsible for converting the RF signals in the
downlink to fiber-optical laser that can be transmitted over the fiber
link to the remote unit. It is also responsible for receiving the laser
light transmitted by the Remote Unit and convert it back to RF signals
that will then usually go into the POI and then later in to the BIU and
further to the Base Station.
The fiber-optic interface can either be a single fiber interface (with
WDM) or a dual head with separate Rx and Tx connectors. This is
ordered as needed when the Master Unit is specified.
Each FOI can serve up to 4 Remote Units over a single fiber.
Safety and Care for fibers
The laser is a Class 3b laser that produces invisible infra-red coherent light.
EXTREMELY IMPORTANT is to avoid looking into fiber connectors and receptacles.
Not safe to view with optical instruments. Always use the protection caps on not
used fibers and receptacles.
Figure 2: Fiber optic interface
Figure 1: Base station interface