User Manual
ADCP-75-115 • Issue A • August 2001
Page 4
©
2001,
ADC
Telecommunications,
Inc.
Admonishments
Important
safety
admonishments
are
used
throughout
this
manual
to
warn
of
possible
hazards
to
persons
or
equipment.
An
admonishment
identifies
a
possible
hazard
and
then
explains
what
may
happen
if
the
hazard
is
not
avoided.
The
admonishments
—
in
the
form
of
Dangers,
Warnings,
and
Cautions
—
must
be
followed
at
all
times.
These
warnings
are
flagged
by
use
of
the
triangular
alert
icon
(seen
below),
and
are
listed
in
descending
order
of
severity
of
injury
or
damage
and
likelihood
of
occurrence.
1 DESCRIPTION
The
Digivance
LRCS
Single
Band
SMR
Remote
Unit
(RU),
serves
as
the
cellular
user
servicing
unit
for
the
Digivance
LRCS
Single
Band
SMR
system.
The
system
consists
of
up
to
15
Host
Units
(HUs)
each
of
which
is
attached
to
a
single
RU.
In
the
forward
direction,
the
RU
receives
digital
optical
signals
from
the
HU,
converts
the
digital
optical
signals
into
an
RF
signal
format,
and
transmits
these
signals
to
cellular
phones.
In
the
reverse
path,
the
RU
receives
RF
signals
from
cellular
phones,
digitizes
the
RF
signals,
converts
the
signals
to
digital
optical
format,
and
transmits
the
signals
to
the
HU.
RUs
configured
with
the
Diversity
option
require
a
redundant
fiber
optic
reverse
path
to
the
HU.
All
RUs
are
configured
with
a
minimum
of
one
antenna
to
transmit
and
receive
RF
signal
transmissions
between
the
RU
and
the
cellular
phones.
On
RUs
configured
with
the
Diversity
option,
a
second
antenna
is
connected
to
the
RU
to
provide
a
redundant
receive
RF
signal
path
from
the
cellular
phones.
The
RU
also
transports
alarm
status
to
and
from
the
HU
using
the
optical
link.
2 UNPACKING AND INSPECTION
After
receiving
the
components
of
the
RU,
unwrap
each
item
and
inspect
for
damage
or
missing
parts.
The
basic
RU
components
package
includes
the
following
items:
•Spectrum
Transport
Module
(STM)
•Linear
Power
Amplifier
(LPA)
Module
Danger:
Danger
is
used
to
indicate
the
presence
of
a
hazard
that
will
cause
severe
personal
injury,
death,
or
substantial
property
damage
if
the
hazard
is
not
avoided.
Warning:
Warning
is
used
to
indicate
the
presence
of
a
hazard
that
can
cause
severe
personal
injury,
death,
or
substantial
property
damage
if
the
hazard
is
not
avoided.
Caution:
Caution
is
used
to
indicate
the
presence
of
a
hazard
that
will
or
can
cause
minor
personal
injury
or
property
damage
if
the
hazard
is
not
avoided.
Warning:
This
equipment
generates,
uses,
and
can
radiate
radio
frequency
energy
and
if
not
installed
and
used
in
accordance
with
the
instruction
manual,
may
cause
interference
to
radio
co