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Co-Operator
INTRODUCTION
1-3
The
Orban
Co-Operator
The Orban Model
464A
Co-Operator™ Leveler/Compressor/HF Limiter
is
an
inte-
grated
automatic gain
control
(AGC)
device
of
the
highest professional
quality.
The
Co-Operator
is
a
friendly,
automatic
"assistant
operator"
that
smoothly and
unobtru-
sively rides gain, controls
high-frequency
levels,
and
limits
peaks.
The
Co-Operator
achieves
its
outstandingly transparent
audio
performance through
the
use of
finely-tuned control
loops
which
eliminate the
dynamic
distortions that are
the
downfall of
most
conventional compressors
and
limiters,
and through
the
use of
a
clean, class-
A
proprietary
VC A
to
ensure
negligible
static
distortion
and
noise.
•
A
smooth
leveler function
provides transparent gain
riding
—
without long-
term
distortion-producing overshoots.
•
A
faster
"compression"
function
can be
switched
in to
provide
additional
transient
overshoot
protection for material
with abrupt
level
changes or un-
usually
high peak-to-average
ratios.
The
compression
function
is
available
without
leveling for applications
that require safety
limiting only.
•
Release time
and
release
shape
are adjustable
to
optimize processing
for
music
or
voice.
•
A
defeatable "silence gate" prevents noise rush-up, holes,
pumping, and
breathing
by
inhibiting
sudden
gain
increases
once
the signal level
falls
below
a
preset threshold (during
pauses or low-level
program
material).
•
Six switchable
HF
limiter
pre-emphasis/de-emphasis curves (25
to 150|is)
allow
the
HF
limiting to react
optimally
for the
medium
or device being
protected
and guard
against
excessive
sibilance.
•
A
defeatable clipper follows the
HF
limiter for
absolute
peak
protection.
•
Either stereo-tracking or
independent two-channel operation
can be
selected.
•
The
least-used controls are
concealed behind
a security
panel
to
avoid con-
fusing non-technical
operators,
and
to
permit tamper-proof
calibration.
•
Two
LED
bargraphs per channel simultaneously
display gain reduction
and
peak
output
levels.
•
Output
level
meter can be
calibrated
to
match
the
overload point of the device
being drivea
•
Balanced,
floating inputs
and
outputs
are
EMI-suppressed;
the
Co-Operator
is
compatible with
the
levels
and impedances found
in
both
professional
and
semi-professional
applications.
•
25dB
gain reduction range
is
achieved with
a low-distortion, class-A
VCA.
•
Two
channels
packaged
in a
space-saving, rugged,
all-metal,
1
%-inch
chassis.
•
Hard-wired bypass
switch
is
included.
\
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