FS71C-85
Series
User
M anual
|
3
Copyright
©
2015
Fiber-Span
The DHRU is used to provide cost-effi cient wireless
signal distribution in areas that have poor coverage.
Fiber-span has included additional unique hardware in
the DHRU that allows it to both power a local passive
DAS plus feed fi ber-optic transceivers (FTU).
The downlink port is tapped off the output of the
downlink amplifi er. The uplink frequencies are com-
bined prior to amplifi cation in the uplink amplifi er.
The separate downlink and uplink ports are present on
the bottom of the wall mount unit or the rear of the
subrack version along with the (Donor) Antenna port
and a DAS port.
Most applications for simple coverage enhancement
solutions would require a Bi-Directional Amplifi er
(BDA).
The DHRU is Fiber-Span’s technology equivalent to
the BDA, with the additional functionality of a DSP
processore that digitally fi lters the incoming signals
with precise narrowband fi lters centered around each
incoming individual channel. The DHRU also allows for
local coverage via a downlink power amplifi er plus a
direct connection to fi ber-optic transceivers for feeding
a fi ber DAS.
The DHRU amplifi es RF frequencies in both the
downlink and uplink paths with duplexers that provide
both downlink and uplink frequency bands on a single
distributed antenna system.
The following block diagram better illustrates how the
DHRU is confi gured.
Figure 2. DHRU - Internal Block Diagram
