User Manual
ADCP-75-110 • Issue B • March 2001
Page 9
©
2001,
ADC
Telecommunications,
Inc.
Fig 5B-A
REAR VIEWFRONT VIEW
(4) ANTENNA CONNECTOR
(1) STATUS LED
(2) 48 VDC POWER
CONNECTOR
(3) FIBER LINK
OPTICAL ADAPTERS
TX-LEFT - RX-RIGHT
Figure 5. Digital Remote Unit User Interface
Table 2. Digital Remote Unit User Interface
REF
No.
USER INTERFACE
DESIGNATION
DEVICE FUNCTIONAL DESCRIPTION
1 STATUS Multi-colored
LED
(Red/Green/Yellow)
Indicates
if
the
status
of
the
DRU
is
normal
or
faulty
or
if
the
forward
path
optical
input
is
normal
or
lost.
(see
Note)
248
VDC RJ-45
jack
(female) Used
for
connecting
a
DC
power
cable
3 FIBER
TX
RX
Duplex
LC-type
fiber
optic
adapter
Used
for
connecting
the
forward
path
and
reverse
path
optical
links
4 – SMA-type
coaxial
connector
(female)
Used
for
connecting
the
antenna
coaxial
cable
lead
Note:
A
detailed
description
of
LED
operation
is
provided
in
Section
5.
1.4 Digital Expansion Unit Description
The
DEU,
shown
in
Figure
6,
serves
as
a
service
expansion
unit
and
line
extender
for
the
Digivance
ICS.
The
DEU
provides
the
following
basic
functions:
• Optical
interface
to
the
DHU
and
up
to
six
DRUs
or
DEUs
• Conversion
of
the
forward
path
digitized
optical
signal
to
an
electrical
bit
stream
• Splitting
of
the
electrical
bit
stream
into
six
separate
bit
streams
• Conversion
of
the
six
forward
path
electrical
bit
streams
into
six
digital
optical
signals
• Conversion
of
up
to
six
reverse
path
digital
optical
signals
into
six
serial
bit
streams
• Combining
of
the
six
reverse
path
serial
bit
streams
into
a
single
digital
composite
signal
• Conversion
of
the
single
digital
composite
signal
to
a
digital
optical
signal
• DC
power
for
powering
the
DRUs
• Alarm
transport
via
the
optical
links