User Manual

ADCP-75-150 Preliminary Issue A March 2003 Section 2: Description
Page 2-15
©
2003,
ADC
Telecommunications,
Inc.
5 SPECTRUM TRANSPORT MODULE
The
Spectrum
Transport
Module
(STM),
shown
in
Figure 2-7,
provides
the
following
basic
functions:
Provides
an
RF
interface
(antenna
ports)
to
the
remote
antenna(s).
Provides
an
optical
interface
to
the
HU.
•Converts
the
digitized
forward
path
optical
signal
to
a
digitized
RF
signal.
•Converts
the
digitized
RF
signal
to
a
composite
RF
signal.
Digitizes
the
reverse
path
composite
RF
signal.
•Converts
the
digitized
reverse
path
RF
signal
to
a
digitized
optical
signal.
Provides
an
RS-232
interface
for
connecting
a
local
DEMS
computer.
Transports
alarm,
control,
and
monitoring
information
via
the
optical
link.
Provides
AC
power
input.
Provides
external
alarm
input.
5.1 Primary Components
The
STM
consists
of
an
electronic
circuit
board
assembly,
power
supply,
duplexer,
and
fan
assembly
that
are
mounted
within
a
powder-paint
coated
sheet
metal
enclosure.
The
metal
enclosure
provides
a
mounting
point
for
the
electronic
components
and
controls
RF
emissions.
Except
for
the
fan
unit,
the
electronic
components
are
not
user
replaceable.
The
STM
is
designed
for
use
within
the
RU
outdoor
cabinet
or
indoor
mounting
shelf.
Except
for
the
LPA
interface
connector,
all
controls,
connectors,
indicators,
and
switches
are
mounted
on
the
STM
front
panel
for
easy
access.
A
carrying
handle
is
provided
on
the
front
of
the
STM
to
facilitate
installation
and
transport.
Table 2-3. Remote Unit Outdoor Mounting Shelf User Interface
REF
NO
DEVICE FUNCTIONAL DESCRIPTION
1STM
mounting
slot Provides
a
mounting
point
for
the
STM
module.
2LPA
mounting
slot Provides
a
mounting
point
for
the
LPA
module.
3 Grounding
lug Provides
a
connection
point
for
an
external
grounding
cable.
4AC
power
cable Provides
AC
power
to
the
STM.
5WDM
mounting
slot Provides
a
mounting
point
for
the
WDM
module.
6CWDM
mounting
slot Provides
a
mounting
point
for
the
CWDM
module.
7CWDM
power
cord Provides
DC
power
to
the
CWDM
module.
FCC ID: F8I-DLC0802A User Manual - Part 2

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