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SECTION
3:
Operating
Instructions
1.
SUMMARY
[See
Appendix
A
for a
2-page
Guide For The Master Control
Operator].
Red
ACTIVE
lamps
(upper row) indicate an active function.
Yellow
STANDBY
lamps
(lower row) indicate
the current
standby
function.
STANDBY
lamps
light
only
when
a
User
Interface
Control
input
is
activated.
The
current
standby function
will
become
active
when
the current active function
is
released (which
is
when
all
User Control
Interface inputs
become
inactive,
or
when
the
AUTOMATION LOCKOUT
button
is
pressed
to
regain
manual
control).
The
standby
function
is
selected
off-line
by
pressing the
corresponding
button.
MANUAL
buttons
select the
source channel
(LEFT
or
RIGHT)
for
stereo
synthesis, or
BYPASS
the stereo synthesizer.
All
these
MANUAL
controls
cancel
the
AUTO
function.
AUTO
button
initiates
automatic, program-controlled
mono/stereo
detection.
If
source
is
recognized
as
mono,
stereo
is
synthesized
from
an automatically selected
channel.
(A rear-panel
RECOGNITION
switch
enables
or
disables the
recognition
of
center-channel
mono.
An
internal
RECOGNITION
THRESHOLD
trimmer
adjusts
the
sensitivity of
this
function.
See
Section
1.)
AUTOMATION LOCKOUT
enables panel controls
(including
those on the optional
275A/RC Remote
Control
Panel)
to
override
User Control
Interface
inputs.
When
this
button
is
pressed, the
current standby function
becomes
active.
SYNTHESIZER
COMB
BANDWIDTH
buttons
select
WIDE
(best for
music and
effects) or
NARROW
(best for dialog)
bandwidths.
SEPARATION
determines
the
amount
of artificial
channel separation
in
Synthesize
mode
only
(it
has
no effect on true stereo
material). This setting
can
affect
perceived
relative
loudness
between
true
and synthesized
stereo material.
AUTO
POLARITY
ON
initiates
automatic monitoring and
correction
of
phase
for
true
stereo material.
The
INVERTED
lamp
indicates that
an incorrect
input
polarity
has
been
corrected.
OFF
ends
this
function.
NOISE
REDUCTION OPERATE
applies
single-ended
dynamic
noise reduction to
the
synthesized stereo
signal only.
The
EXPANSION
lamp
indicates
broadband
downward
expansion.
DEFEAT
turns off the noise
reduction
circuit.
(To avoid accidental
shut-off,
no
power
switch
is
provided.)
3-1
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