User's Manual Part 1

DSPbR Series – User’s Manual
Document Number 00000.B Page 10/75
2. PRODUCT INTRODUCTION.
2.1 Application
The RF Industries DSPbR (Digital Signal Processor based Repeater) Series is designed as a multi-channel,
multi-band expandable rebroadcast repeater/booster used for extending network coverage in either outdoor or
indoor applications.
Ideal for cost effective expansion of a network coverage boundary or to provide multi-site coverage footprint
from a single site infrastructure – without the need for large-scale site developments with dedicated backhauls.
2.2 Product Overview
The DSPbR is a modulation transparent, channel bandwidth adaptive, spectrally clean, high power channel
selective rebroadcast repeater/booster. The DSPbR strengths lie in its modular upgradability and user-friendly
adaptable connectivity options for configuration and alarm reporting. The DSPbR can be used to rebroadcast
both analogue and most digital modulation schemes.
Sub Rack Frame
The DSPbR is built into a standard 19” 4RU sub rack frame with top, bottom and side covers.
DSP technology
The RF Industries DSPbR uses Digital Signal Processing technology, replacing traditional fixed hardware used
in IF filtering such as crystal filters with software defined digital filtering providing flexibility and real time
optimisation. When a migration of technology is required, whilst using a DSPbR rebroadcast repeater/booster
this is simply achieved through a configuration change via the web based browser interface where a number of
the specifications can be re-configured such as channel filter profile, uplink and downlink frequencies, output
power or gain. The DSP capability allows for up to 8 bi-directional channels in a single sub rack frame. Up to six
individual configuration dependent bands can be accommodated, each band having a fixed bandwidth of
20MHz.
The frequency agility of the DSPbR within the predetermined band of the respective RF module allows for either
“on-air” rebroadcast of the incoming frequency or translation of the incoming frequency to a different
rebroadcast frequency across a number of bands and channels.
The DSPbR can be used for frequency shifting or bridging a number of channels to a second DSPbR unit
remotely sited from a host BTS to extend the BTS frequencies without facing input to output isolation problems
when broadcasting on the same frequency. The major advantage in not having to rebroadcast “on frequency” is