5 |
P a ge
GENERAL
OPERATIONAL
DESCRIPTION
The
BDA
Downlink
path
receives
RF
signals
from
the
base
station
and
amplifies
and
transmits
them
to
the
subscriber.
The
BDA
Uplink
path
receives
RF
signals
from
the
subscriber
and
amplifies
and
transmits
them
to
the
base
station.
The
Uplink
and
Downlink
occupy
two
distinct
frequency
bands.
See
table
on
page
6
for
list
of
bands
and
corresponding
band
codes.
Frequencies
applicable
to
your
unit
will
also
be
on
unit’s
specification
sheet.
The
diplexer
isolates
the
paths
and
route
each
signal
to
the
proper
amplifying
channel.
An
Automatic
Level
Control
(ALC)
allows
for
output
power
limiting.
A
variable
step
attenuator
gives
0
–
30
dB
of
attenuation
in
2
dB
steps.
The
use
of
these
controls
is
covered
in
the
“OPERATION”
section,
later
in
this
document.
The
Mini
‐
BDA
can
be
used
as
a
line
amplifier.
With
an
optional
external
bias
‐
tee,
the
Mini
‐
BDA
will
function
with
power
coming
from
the
In
‐
building
antenna.
Содержание BDA-PS8NEPS-20/20-70-M
Страница 11: ...11 P a ge MECHANICAL OUTLINE...
Страница 18: ...18 P a ge APPENDIX 2 Antenna Separation variable definitions...
