DSPbR Series
– User’s Manual
Document Number 00000.B Page 18/75
3. FUNCTIONAL DESCRIPTION.
3.1 General
The DSPbR Series repeater is based on the use of a DSP engine to provide unprecedented flexibility in
providing software defined channel specific filter profiles, channel characteristic parameter configuration and
alarm reporting.
Built on a modular platform for ease of upgradability and configuration options, the DSPbR Series provides the
user a very flexible and ultimately cost effective product, the idea of which is to provide an easy upgrade path
when a user is motivated to follow ever changing technology migration paths. Change; which effectively
incorporates improved features, has been shifted from physical hardware to firmware upgrades. The hardware
has been minimised to a technologically achieved minimalist platform with more attention paid to processing
speeds and power within the DSP FPGA platform.
Engineering connectivity flexibility into the hardware platform has opened numerous possible hardware
configurations stretching across nominated RF front ends (uplink or downlink receivers) to RF back ends (uplink
or downlink RF Tx PA’s) and where required across different bands within the DSPbR series.
Expanding capability even further, a single sub rack frame can be daisy chained using CAN bus interconnection
to allow for additional sub rack frames to be added, expanding the number of channels and cross band
capability. Where an additional sub rack frame is added to an existing unit, the first sub rack frame will be
nominated as the “Master Unit” and concurrent sub rack frame or frames - the “Slave Units”. This essentially
applies to the CSC within the respective units.
This flexibility unlocks numerous configuration options, allowing for simple “on frequency” re-broadcast to
frequency translating rebroadcast within or across into a different nominated band.
DSPbR configuration has been facilitated through the use of an on-board web browser via the front or rear
mounted Ethernet port.
Alarm reporting is fundamentally achieved through SMS messaging via the onboard cellular modem option.
Further to this, current development through a firmware upgrade will provision for SNMP north bound traps to
be sent via either the Ethernet connection connected directly to an IP network or via the cell modem in a call
initiated IP session.
In addition, critical and minor alarms activate two relays respectively with isolated N/O or N/C contact potentials,
which are wired via the DB15 socket at the rear of the unit (Ref Gen + Aux module).
