Akai DR4vr Operator's Manual page 24

1
6 Chapter
1
:
Front
&
Rear Panels
1)
ANALOG
INPUT
These
114
inch
stereo
phone
jacks are
used
to
input analog
signals
to
the
DR4vr. They
accept
balanced and unbalanced
signals:
Tip
=
hot, ring
=
cold, sleeve
=
ground.
2)
Input
GAIN
switch
These
switches allow you
to
set
the
DR4vr
input gain.
They
can be
set
to
-10 dB
or
+4
dB.
Input gain switches
are
provided
for channels
1/2
and channels
3/4.
3)
ANALOG
OUTPUT
These
1/4
inch
stereo
phone
jacks
are
used
to output analog
signals
from
the
DR4vr. They
can
be
used balanced
or unbalanced: Tip
=
hot, ring
=
cold, sleeve
=
ground.
4)
Output
GAIN
switch
These
switches allow you
to set the
DR4vr
output
gain.
They
can be
set to
-10
dB
or
+4
dB.
Output
gain switches
are provided
for
channels
1/2
and
channels
3/4.
The
actual output gain depends whether
you
use the outputs
balanced or unbalanced.
The
following
table
shows
the actual gain
for each
possible
setting:
Connection Type
Switch
Setting
-lOdBV
Balanced -4dBV
+4 dBu
Unbalanced -lOdBV
-2dBu
0
dBu
= 0.775 Vrms, OdBV =
1
Vrms
5)
DIGITAL l/O-A
IN
These
XLR
and
RCA/phono
connectors are used
to input
AES/EBU
and S/PDIF
format
digital
signals respectively.
The
active input
is
selected
using
the
D
IN sub-menu
function. See
"Selecting
the Digital Input Connection Type"
on page
25.
Without
the optional IB-
1
lOD
Digital Interface, the
left
channel
digital signal
is
fed
to
channels
1
and
3.
Similarly, the right channel
digital signal
is
fed
to
channels 2 and
4.
For
this reason,
it
is
not possible
to
record
more
than
two
channels simultaneously
via the
digital inputs.
If
you
do need
to
record
three or four channels simultaneously via
the
digital inputs,
use
the optional
interface.
6)
DIGITAL l/O-A
OUT
These
XLR
and RCA/phono
connectors
are
used
to output
AES/EBU
and
S/PDIF
format
digital signals.
The
format of
the
digital
output
signal
is
set
using the
D OUT
sub-menu
function.
See
"Selecting the Digital Input Connection
Type" on page
25.
Without
the optional
IB-llOD
Digital Interface, only channel
signals
1
and 2 can be
output
digitally. If
you need
to
output
three or four channels simultaneously
via the
digital outputs,
use
the optional
interface.
You
can backup
all
four channels
to
a
DAT
recorder
via
digital
outputs
1
and 2 even
without
the optional IB-
1 1
OD
Digital Interface.
7)
DIGITAL l/O-B option
slot
An
optional
IB-llOD
Digital Interface can
be
installed into
this slot.
This
interface allows
digital
signals for
channels
3
and 4
to
be
input and
output independently of
the
DIGITAL
i/O-A
connections.
8)
SCSI-B
ID
This
DIP
switch
is
foruse with
the optional IB-
1 1
IS SCSI
interface.
It is
used
to
set
the
DR4vr's SCSI ID
and
termination
for
SCSI-B
bus. This bus
is
for backing
up
to
an
MO
disk
and
connecting
to
personal computers.
This switch has no
effect
on SCSI-A
bus.
Version
4.0 12/95