User's Manual

ADCP-75-348 • Issue 1 • 04/2008
Page 2
© 2008, ADC Telecommunications, Inc.
2 INTRODUCTION
The front access URH Host Unit interfaces with the BTS and performs the analog to digital and
electrical to optical conversions for transport to the URH Remote Units. A typical URH system
consists of a Host Unit (HU) and a Remote Unit (RU).
The HU is designed for maximum RF flexibility to address Carriers changing and evolving
spectrum needs, making the most use of cost efficient resources for serving multiple remotes
such as simulcast architecture and sharing of common functions such as power, control and
management over multiple host units. These features are designed into a compact package that
reduces the amount of overall rack space required within a BTS Hotel. Each host chassis can
support up to eight RUs.
The HU is a three rack-unit high single-unit assembly that mounts in a standard equipment rack.
The RU consists of an outdoor enclosure that houses various electronic components. The RU is
a modular self-contained enclosure. Together the HU and the RU together comprise an URH
system. Various accessory items are also available for use with each system. All items
referenced as “accessory items” are not furnished and must be purchased separately.
3 HOST UNIT DESCRIPTION
A front view of the HU, shown in Figure 2 , consists of an electronic circuit board assembly and a
fan assembly that are mounted within a powder-paint coated sheet metal enclosure. The enclosure
provides a mounting point for the circuit board and fan assembly and controls RF emissions. Fan
assembly can be replaced in the field. Host Unit may be upgraded once it is installed to support
additional URH Remote Units. This can be performed without disrupting service.
Figure 2. Front View Host Unit
The HU is designed for use within a non-condensing indoor environment such as inside a wiring
closet or controlled environment cabinet. All controls, connectors, and indicators (except the
grounding point) are mounted on the HU front panel. Current versions of the HU allow vertical
cable guides to be installed over the mounting brackets on either side of the HU.
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
REV
RF OUT
REV
RF IN
STATUS
PWR
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