9 |
P a ge
BDA
CONNECTIONS
The
BDA
uses
an
external
power
supply
which
connects
through
a
single
pin
15V
DC
input
located
on
the
back
of
the
unit.
A
optional
9
‐
pin
D
‐
Sub
connector
provides
failure
alarm
output
contacts.
The
RF
connections
are
made
via
two
type
“N”
female
connectors.
The
RF
connector
labeled
“BASE”
must
be
connected
to
the
antenna
pointing
towards
the
base
station.
The
RF
connection
labeled
“MOBILE”
must
be
connected
to
the
antenna
facing
the
area
to
be
covered
by
the
BDA.
The
RF
connections
must
be
made
through
cables
with
characteristic
impedance
of
50
ohms.
The
isolation
between
the
base
station
antenna
and
the
mobile
antenna
should
be
at
least
15
dB
higher
than
the
BDA
gain.
Isolation
less
than
this
value
can
cause
gain
ripple
across
the
band.
Isolation
equal
to
or
less
than
the
BDA
gain
will
give
rise
to
oscillations
which
will
saturate
the
amplifiers
and
possibly
cause
damage
to
the
BDA.
Connector from
Donor Antenna
Connector to
DAS
DL Alarm
LEDs
UL Alarm
LEDs
Power
On LED
