Clear-Com MS-222 User Manual

DESCRIPTION
/
Clear-Corn
MS-222
2-Channel
Main
Station
1.1
MS-222
OVERALL
DESCRIPTION
The
MS-222
is a
rack-mount,
two-channel
main
station
with
a speaker,
optional
goose
neck
microphone
(MS-222GM),
regulated
power
supply
and
a
versatile
monitoring
system.
It
features
excellent
speech
intelligibility
in all
noise-levels.
The
MS-222
contains
two
mic
preamps
with
limiters
for
each
microphone
input.
Each
microphone
preamp
is
optimized
for
the
type
of
microphone
used
with
it.
The
MS-222's
four-watt
power
amp
can
drive
a standard
Clear-Com
headset
to
levels
greater
than
110
dB
SPL.
The
MS-222
provides
DC
voltage
and
the
ability
to
talk
& listen
on
two
separate
channels.
It supports
and
monitors
two
intercom
lines
containing
as
many
as
30
remote
head-set
or
6 remote
speaker
stations.
Monitorina
System
The
front
panel
of
the
MS-222
has
one
headset
connector
and
a
panel
mounted
speaker
for
use
by
the
operator.
The
operator
monitors
the
intercom
channels
turning
up
the
appropriate
"Listen
Level"
volume
controls
(one
for
Channel
A,
one
for
Channel
B).
Either
channel
may
be
monitored
separately,
or
both
simultaneously
(without
tying
the
two
channels
together).
These
volume
controls
are
always
active
regardless
of
'Talk"
channel
selection
on
the
station.
The
speaker
may
be
turned
on
and
off
with
a separate
front
panel
switch.
The
jack
marked
"Earphone"
is connected
in
parallel
with
the
earphone
circuit
of
the
S
headset
connector.
It can
be
used
for
monitoring
or
recording.
Dual-Action
"Tak
Butons
Each
channel
has
its
own
"Talk"
button
which
can
either
"Latch"
on,
or
operate
momentarily.
Pressing
the
button
quickly
will
"toggle"
the
"talk"
function,
alternately
turning
it
on
or
off.
The
"Talk"
button
will
illuminate
dimly
when
activated.
Staae
Announce
(Paging)
The
"STAGE
ANNOUNCE"
button
on
the
front
panel
sends
the
signal
from
the
chosen
microphone
preamp
to
the
balanced,
line-level
Stage
Announce
output
on
the
back
panel.
The
Stage
Announce
button
also
mutes
the
operator's
voice
output
to the
intercom
channels.
This
mute
function
can
be
defeated
with
an
internal
user
selectable
jumper.
The
"STAGE
ANNOUNCE"
button
also
activates
a SPDT
from
"C"
relay
when
pressed.
The
1 amp
contacts
can
be
used
for
any
user
desired
control
function
(i.e.
muting
a local
monitor
speaker).
Sidetone
The
"Sidetone
Adjust"
controls
for
each
channel
on
the
front
panel
allows
adjustment
of
the
operators
own
voice
as
heard
in
the
headset.
11/90
Rev.
1.0
Page
6

Clear-Com MS-222 Specifications

General

Brand	Clear-Com
Model	MS-222
Category	Intercom System
Language	English