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RÄ/ox"
MR8
no
3.6
lnpuUoutput module
1.775.070
Fader
start
INPUT
Tape
1,2
OUTPUT Tape
1,2
Coupling of two
MR
8
VCA
option
3.7
Control room monitor module
The
fader start logic is identical for all input and master modules.
The linear fader
in
the individual input channels
or
the master module generates
a
VCA
controlvoltage between
0
and
+5 V.
This
voltage
is
also
used for
controlling
the fader
start logic. lt
is
amplified in lC
9
by
a
very high gain factor (x
1000);
for
this reason even an extremely smallvoftage from the linearfader
(short
opening
travel) suffices
to
create on
lC
9
thevoltage
required
forthe start
logic. Any
further
rise
in
the
voltage
willbe
limited by
diode
D5.
When the
linearfader
is
opened,
the
start
relay
becomes energized
and drops
out
again when the
fader
is
closed.
For
the pin assignment of
the FADER
START
socket (25 pole D-type) refer to
section "schematic diagrams, pcbs"
1
.775.035.15.
A balanced high-level
signalcan
be
connected directly
to
the stereo input TAPE
1
or
TAPE 2 (XLR sockets, balanced).
Thetwotape inputs haveonlya monitorfunction. Theycannot
be
fed
tothe master
signal. When you
pressthe
keys
[q]or
[r] of
thecontrolmonitor
unit,
thetapesignal
can be connected directly to the monitor bus and be monitored.
The signals
of
the balanced type inputs are available unbalanced
on
the TAPE
1
and TAPE
2
outputs. From here they can be taken
via
a
CINCH-CINCH
connecting cable to
any unbalanced input (STEREO).
The inputs and outputs TAPE
1,2
can
be used universally as transformers for
connecting balanced high-level sources to unbalanced
hi{i
equipment.
For
coupling
two MR 8 mixing consoles, the BUS EXPANSION [31]sockets are
to be interconnected. The position of
the
labelled plug on
the connecting cable
determines
which console functions as the master or slave. From the
slave
console
the
master, AUX
and
PFL buses are connected directly
to
the
corresponding buses of
the master,
i.e.
the master faders are bypassed.
The
monitor cut
function of the slave console cannot be used.
This mixing console is equipped for an
efiernal
VCA control,
e.g.
for connection
to
the video editor BVE 900.
For
this purpose the D-type socket VCA-CONTROL
[29] and
an interface board
(1
.775.485.00) are
to be
installed. lf
the VCA input
voltage is +5V, the corresponding
channelwillbe
muted.
1.775.470
A
signal source can be connected to the monitor bus via the keys [n] ...
[s].
lf
PFL
is
selected,
at least
one
PFL key
of
an
input
must be
pressed.
The
following
monitoring
facilities exisl: PFL, AUX send, AUX return, TAPE 1, TAPE
2,
MASTER.
The VOLUME potentiometer [t] controls the level of the monitor output.
The
monitor speaker and
the headphone volumes are adjusted with the
PHONES
potentiometer
[z].
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