User's Manual

UM-0849 4
2. Product Description.
The DH4 Signal Booster Series are FPGA based Digital Channel Selective signal boosters that operates in
the downlink frequency of 450 - 512MHz and in the uplink frequency of 450 - 512MHz for United States
and 450 - 470MHz and in the uplink frequency of 450 - 470MHz for Canada.
This Signal boosters extends the radio coverage into areas inside the Base Station range where propagation
losses prevent reliable communication.
The system receives the DL signal though a Donor antenna to be amplified, filtered and re-radiated through
the Service antennas. The UL signal is received by the Service antennas to be amplified, filtered and re-
radiated through the Donor antenna back to the Base Station. This way, the system works as a Bidirectional
Amplifier.
This signal booster is capable of handling 12 carriers in uplink and 12 carrier in downlink. The center
frequency of each one of the 12 filters can be tuned via a software interface.
The intermediate filtering of this equipment is performed by using FPGA based Digital Signal Processing
that, among many, has the following features:
• High Selectivity vs Low Delay performance selection.
• AGC per channel and per time slot.
• Squelch per channel and per time slot.
• Integrated Spectrum Analyzer.
This Digital Signal Booster has a heavy duty IP67/NEMA4X cabinet for outdoor usage, it is designed to be
wall or pole mounted.
This Digital Signal Booster is intended to be used in P25Ph1, P25Ph2, TETRA, DMR, Mototrbo and
Conventional radio systems.