And Application - Orban 275A Operating Manual

Automatic stereo synthesizer
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SECTION
1:
System
Description
And
Application
1
.
PERFORMANCE
Stereo
inputs
and outputs
HIGHLIGHTS
Designed
to
be placed permanently
in
series
with
the
program
line.
Fully
compatible
with
mono
receivers
They
reproduce
the synthesizer's
original
mono
input.
Audio-controlled switching
between
true
and synthesized
stereo
Synthesizer
is
activated
when
audio
is
absent on one channel and, optionally,
when
both channels
are nearly equal.
In
addition, local
and
remote manual
override control
is
available.
Smooth
"cross-fade" switching
between modes
Program-adaptive
crossfade
rate avoids clicks
and
pops.
Automatically detects and
corrects polarity-reversals
Automatically corrects "out-of-phase"
stereo
inputs.
Phase-shift-derived
comb
filter
stereo synthesis
Orban's patented phase-shift-derived
comb
filter
stereo synthesis technique.
Two
remote-selectable stereo
synthesis
modes
allow
matching
the
spatial
perspective
to
the
program
material.
"Narrow"
mode
centers dialogue.
"Wide"
is
more
dramatic
on
music and
effects.
Single-ended
dynamic
noise reduction
A
combination
of
program-controlled lowpass
filtering
and
downward
expansion
is
available for noise
reduction on synthesized material.
lOdB
reduction
of
hiss
and
hum
is
typically
achieved.
Optically-isolated
automation
control of
all
functions
Optional 19"
rack-mount
Remote
Control Panel
Duplicates
main
unit
control panel.
Fully-balanced, transformerless inputs
and outputs
+26dBm
clipping level
permits
use with
+4
or
+8dBm
lines.
Space-saving
chassis
Mounts
in
1
3/4" of rack space.
1-1

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