User's Manual Part 1

DSPbR Series – User’s Manual
Document Number 00000.B Page 12/75
Modular Construction
The DSPbR hardware is modular in construction and designed to provide exceptional installation and channel
expansion efficiency, allowing hot-swappable hardware upgrades to increase the number of repeater channels
up to a maximum of eight bi-directional channels or up to 16 separate transmitters in a single 19” 4RU sub rack
frame.
The RFFE and RFBE modules are bolted to their respective BPF modules or TL Module, slid into the mating
connectors of the centrally located motherboard via top and bottom mounted guide rails within the allocated slot
and screw fastened into the sub rack frame using the module fastening facility.
Modules
The DSPbR has the following modules;
AC or DC Power Inlet
AC or DC PSU.
CSC - Central System Controller
DSP - Digital Signal Processor
Ref Gen + Aux– Reference Generator + Auxiliary module, includes GPS and optional cell modem.
RFFE – RF Front End (band specific)
RFBE – RF Back End (band specific)
BPFM – Band Pass Filter (band specific, bolted to input of RFFE and output of RFBE)
TLM - Through Line Module (optional)
Cxxx-8 Combiner Filter Unit (band specific / optional)
The RFFE and RFBE are limited to a 20MHz bandwidth. One RFFE can feed a number of RFBE’s, each RFBE
capable of rebroadcasting channels with typical channel spacing’s of 6.25, 12.5 or 25 kHz.
Band specific BPFM’s fit directly onto the input of the RFFE modules and output of the RFBE modules and the
8 Channel combiner filter unit replaces the BPFM’s fitting directly onto the RFBE modules.
There are no internally fitted coaxial interconnect cables. All modules are provided with guided slide fit and
fasten connectivity.
An RFFE module is partitioned into Side “A” and Side “B”. Two separate RFFE’s boards can therefore be
accommodated within a single RFFE module. Fitting both sides of the module with RFFE’s boards is optional
and dependent on the required configuration and prospect of future upgradability.