User Manual
Table Of Contents
- System Part Number Explanation
- 1 Introduction
- 2 System Description
- 2.1 Master Unit
- 2.2 Remote Unit
- 3 System design
- 4 Installation guidelines
- 5 Commissioning
- 6 RF Commissioning
DELTANODE FIBER DAS MANUAL
©DeltaNode Solutions 2012
11
Revision 12-03
The BIU is technology neutral and in the downlink path contains only settable attenuators that can be
used to adjust the signal strength to proper levels before feeding them into the POI. In the uplink there is
an amplifier followed by a settable attenuator used to adjust the signal and the noise level into the base
station uplink.
All connections necessary are made from the front of the BIU itself. The maximum recommended input
power to the BIU is 30 dBm and there are high power alarms that activate at > 30 dBm and low power
alarms at < 10 dBm input power. A higher input power than the recommended can cause the unit to fail
permanently thus needing replacement. It is therefore recommended that for high power base station
an attenuator is used to ensure that the input power to the BIU can never exceed specifications.
There is also a 0 dBm input version of the BIU available on request.
Schematic of BIU RF paths
The schematic to the left shows the
blocks in the BIU for one of the
channels and how the signal
detector for the downlink level
alarms are connected.