User Manual
Table Of Contents
- 1. Document History
- 2. Disclaimer
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- 3. Safety Instructions and Warnings
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- 4. Introduction
- 5. Functional Description Of R4 Band Selective Repeater
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- 6. To Get started-Basic Software Control Of the Repeater
- 7. R4 Repeater Specifications
- 8. Installation
- The gain of repeater is set using software control through local USB serial port or optional wireless modem
- 9. System Maintenance
Next Generation
Signal Enhancement
c) Overlapping Coverage
Ideally, the repeater system will be engineered with minimal overlapping
coverage between the donor base station and the repeater. However, the
mobile users will occasionally receive signals from both the donor and the
repeater at similar levels. This situation is comparable to a mobile
receiving multiple signals at varying times due to multi-path propagation.
The R4 repeater contributes a maximum signal delay of 5.5 microseconds
in each direction.
d) Call Processing
The mobile communication system perceives calls handled by the repeater
as actually being handled by the donor site (BTS); the repeater is just an
extension of the base station’s coverage. Therefore, the donor handles call
initiation, power control messages, hand-over requests, etc., for mobiles in
the repeater area. When the base station assigns a channel to the mobile,
that channel is sent through the repeater and then reradiated under the
same frequency. Since the repeater is technically part of the base station,
no hand-over takes place when a mobile moves from the repeater’s
coverage area to that of the base station. When the mobile moves from
the repeater’s area to a neighboring site, the base station handles the
hand-off in the same way as for a mobile in the base station area.
8.3. Installation Tools
You will need the following basic tools for installation:
a. Standard wrenches/screwdrivers/cable stripper/cable cutter/pliers set
for installing the R4 repeater Unit and antennas. (Refer to the
manufacturer’s recommendations for installing the antennas).
b. RF coaxial cable connection tools for installing connectors.
c. Multi-meter.
d. Mobile handset loaded (e.g. Nokia) with Net engineering software to
be used for signal level measurement.
e. Magnetic compass for measuring the azimuth of the BTS and
repeater site.
f. Magnetic compass for measuring the azimuth of the BTS and
repeater site.
8.4. Installation Procedure
The R-4 repeater has been designed for outdoor applications. The repeater
unit shall be mounted vertically to a mast, which means the RF connectors
will be at the bottom side.
In case of wall mounting, minimum physical separation between the repeater
housing & the wall should be 50 mm.
Furthermore, the repeater shall be mounted in a way so that there is free
access to the individual units, while the door of the repeater is open.
Therefore, enough clearance has to be provided for access.
The repeater is mounted at the pre-selected site firmly placed with clamps
and other mechanical accessories. Following connections as detailed below
are carried out:
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