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LEVEL CONTROLS
There are two
main LEVEL
CONTROL.
circuits for each channel.
One circuit is a conventional
audio
amplifier with a
45
mm.
conductive plastic
linear
fader.
This circuit is
normally
assigned
to the
MON
ITOR circuit.
The
second LEVEL CONTROL
circuit
is
a
VOLTAGE CONTROLLED
AMP
LIFIE
R
which uses
a linear
4 inch conductive
plastic fader.
This
combina~ion
is normal-
ly
assigned
to
the CHANNEL
OUTPUT.
The MASTER PROGRAMMING
for these
level
controls is
provided
by the FDR button located on
the STUDIO MONITOR
module.
Whe
n
this button is depressed, the program for these t
wo
controls
on ALL
channels is
REVERSED.
The
VCA is
switched to the
MON
ITOR channel and the
MONITOR
LEVEL CONTROL circuit is
switched
to the
CHANNEL OUTPUT.
An
FDR REV button
is
provided on each INPUT/OUTPUT module to
REVERSE
THE
PROGRAMMING
(for
that module only)
.
A
GREEN LED beside the VCA FADER lights
whenever
the
VCA
circuit has
been
changed to the
MONITOR
circuit.
Level controls for the eight SUB GROUPS described
in
the
MONITORING
SYSTEM section are located as follows:
2
e
ach
in
the
3 AUXILIARY
modules
2 in the
STUDIO
MONITOR module.
LOCAL FADER SWITCHES associated with each of these
SUB GROUP
FADERS
removes control of
that
SUB GROUP
from
the MASTER FADER
(located
on
the
MASTER
module)
.
Thi
s
allows as many
as
NINE MASTER
FADERS to
be
created.
Each
SUB
GROUP will
have
its
own
MASTER
FADER, and the channels NOT assigned to a
SUB
GROUP or to the
MASTER FADER will be controlled by their
ind
i
vidua
l
c han
n
e
l
faders.
This block
diagram shows
the interconnections
between
the
amplifiers
which
feed the control
voltages
to the
VCAs.
fixed
DC
level
master
fader
MASTER
MODULE
fixed
DC~
l
evel
I
I
local
group~·
. . --t
fader
INDIVIDUAL
GROUP
I
M
fixed
DC
levell~
I
I
0
I
2
3
0
channel
fader
CHANNEL
LEVEL
CONTROL
INPUT/OUTPUT M ODULE
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