File
Doc. No.
Date
Version
Page
DBHB-20
5700 9004 055
Aug 05
1.0
7/12
Next Generation
Signal Enhancement
5.0
System Design and Setup
The DBHB-20 is designed to provide optimal coverage for areas of 500 Sq
Meters (5,000 sq. ft) to 1,000 Sq Meters (10,000 sq. ft). However, performance
also depends on the amount of in-building shadowing, and the available forward
signal level at the donor antenna. Typical coverage is usually planned for
relatively small areas such as large conference room or several adjacent rooms
in smaller office areas. Indoor coverage varies greatly due to the nature of
various building construction techniques and materials.
The system design is quite simple & straightforward. The signal from the base
station (of the selected Operator) is picked up, preferably on the rooftop.
The built in receive signal level indicator in DBHB-20 booster helps in aligning the
donor antenna towards the selected base station & it always shows the received
signal level from the base station. It is imperative to monitor the received signal
level from the base station, also called downlink signal. Downlink signal may
change if some high building, trees or any other obstruction comes in the way of
line of site (LOS) between the BTS & the Donor antenna. This may reduce the
downlink received signal level & will result in poor service.
6.0
Installing the DBHB-20
6.1 Pre-installation
considerations
1.
Once the expected coverage area is determined, identify the installation
location for the donor antenna and DBHB-20 booster. Ensure that the
donor antenna has a direct line-of-site to the service provider’s base
station.
2.
DBHB-20 installation site location criterion
i. A cool, dry location, away from other heat generating appliances or
equipment.
ii.
Accessibility to electric power point.
iii.
Flat, structural mounting surface.
iv. Accommodation for the indoor antenna providing line-of-site coverage to
as much of the coverage area as possible.
6.2 Installation
Tools
You will only need the standard wrenches/hammer/screwdrivers/pliers set
for installing the DBHB-20 booster and donor antenna.
