User's Manual Part 1

DSPbR Series – User’s Manual
Document Number 00000.B Page 14/75
This allows for various options of combiners to be selected and optimised for the frequency combinations in
use.
A Through Line Module (TLM) can be used to extend the output of a RFBE to the rear of the sub rack frame
without incurring the additional loss of a BPFM. This module is only used when an external combiner provides
sufficient band pass filtering.
It must be noted that the internal combiner filter option is not subject to frequency changes within the 20MHz
band of the unit, however the external combiner, depending on type, may be restricted to fixed frequencies.
External Duplexer
Where uplink or downlink paths require combining into a single feeder network or antenna, an external duplexer
will be required. RF Industries have a number of 19” rack mountable duplexer types and options available for
most frequency, power and bandwidth requirements.
There is currently no internal duplexer option available for the DSPbR.
.
DOWNLINK
UPLINK
MICRO
CONTROLLER
BPF
BPF
BPF
BPF
HYB
COMB
HYB
COMB
DONOR
BASE
STATION
FACING
ANTENNA
EXTENDED
COVERAGE
AREA
CELL
MODEM
Channel Module
GPS
Active GPS
Antenna
OPTIONAL
OPTIONAL
Channel Module
Channel Module
Channel Module
Channel Module
Channel Module
Channel Module
Channel Module
Figure 1 - Typical DSPbR Functional Block Diagram