2.1.6
INTERFACE
TO
OTHER
COMMUNICATION
SYSTEMS
The
AC-10
Adapt-a-Com
is
a universal adapter
which
enables
Clear-Com
to
be
interfaced with
any
other intercom or communications
link.
When
existing
non-Clear-Com
installations
are being
upgraded
to
Clear-Com
equipment, portions of the older system
can
be
retained. Since
Adapt-a-Com
works
in 2-,
3-
and
4-wire systems,
it
virtually
guarantees compatibility
with
any
house
intercom equipment.
Because
it
will simulate a carbon mic,
Adapt-a-Com
can
be
plugged
into the headset jack
on
a
TV
camera, control
unit,
or other 2-wire systems.
Adapt-a-Com
operates with telephone
company
and
competitive
model
3-wire
intercoms,
facilitates
on-line intercom via standard telephone systems,
and
aids in
direct
communication
between
the studio
and
remote locations via
2 or 4 wire dedicated
TEL.CO.
pairs.
2.1.7
AUDIO
ISOLATION
OF
PARTS
OF
THE
INTERCOM
SYSTEM
In
certain
applications,
it
may
be
desireable to
isolate
conversations
in
one
section
of
the system.
In
these instances, the
BA-l
in-line
isolator
may
be
used
to block audio while allowing
power
to
flow
to the
isolated
leg
of
the system. This inexpensive, passive device
creates
a quasi-dual channel
system
from
a single channel, except
that
the
main
station
cannot contact or
be
called
by
the
isolated
leg of the system.
The
BA-l
enables
you
to
have
private local conversations along a
common
interconnect cable without
need
for multiple cabling or several
main
stations.
Any
number
of
BA-lls
may
be
used,
so
long as the
power
capacity
of
the
main
station
is
not exceeded.
2.2
MAXIMUM
NUMBER
OF
STATIONS
AND
CABLE
CONSIDERATIONS
2.2.1
MAIN
STATION
CURRENT
AND
IMPEDANCE
LIMITS
All
Clear-Com
main
stations,
induding
the
PS-3000
power
supply,
have
the
same
maximum
output current capacity, 2
amps.
For
dual channel
main
stations,
the
total
current
draw
on
both channels cannot exceed 2
amps.
Due
to
impedance
considerations, regardless of the cable lengths or
mix
of
remote
stations,
40
stations
are the
maximum
that
can
be
driven
from
one
main
station.
(In
certain
circumstances,
it
may
be
possible to
use
more
than
40
stations;
contact the factory
for
details.)
2.2.2
CALCULATING
THE
MAXIMUM
NUMBER
OF
REMOTE
STATIONS
In
installations
with less than
500
feet
total
interconnecting cable,
only the
remote
station
current requirements
need
be
considered.
One
main
station
will support
up
to
40
RS-100A
or
MR-102
remote
stations,
or
up
to
15
KB-100
or KB-lll remote
stations.
1/78
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General
Weight and Dimensions
