Allen&Heath iDR-8 - Manual (Page 11)

iDR-8 User Guide 11
Physical inputs and outputs These are the
hardware audio connections including XLRs,
digital expanders, headphones and monitor.
Input and output channels These are
processing channels. The input channels can be
sourced from any physical input. The physical
outputs can be sourced from any output channel.
The input and output channels are interconnected
through the crosspoint matrix. They are routed to
and from the physical connections via the source
patchbays. The iDR-8 has enough processing
built in for 16 input and 16 output channels when
in 48kHz mode. The iDR-in and iDR-out
expanders simply convert between analogue
audio and the digital signals working with the iDR-
8 16x16 matrix.
Analogue inputs The iDR-8 and iDR-in each
have 8 analogue XLR inputs. These feed high
grade balanced mic preamp circuits. They accept
a wide range of microphone and line level signals.
Gain, pad and 48V phantom power switching are
controlled using the iDR System Manager
software so they can be part of the recallable
patch system. There are no trimmers or internal
adjustments needed.
Analogue outputs The iDR-8 and iDR-out each
have 8 analogue XLR line outputs. These are
balanced and can produce up to +18dBu
maximum signal level.
ADC and DAC converters These convert the
analogue signals into digital (ADC) and processed
digital signals into analogue (DAC). High grade
24bit converters are used.
Expander input and output 8 Channels of audio
are communicated between iDR units using these
RJ45 ports. The digital signals are fed to and from
the associated virtual patchbays. Routing the
signals through the patchbays in this way
provides the flexibility for common sources to be
networked between multiple iDR units using CAT5
cable.
Monitor inputs and outputs A front panel stereo
headphones output is provided. Balanced line
level L and R inputs and outputs are available on
the rear panel. The inputs feed the active monitor
bus and can also be routed into the source
patchbay. The outputs are fed from a patchbay
which gets its source from the active monitor bus
or any output channel. In this way these
connections can be used either as a monitor
system or as channels in their own right.
Signal generator Provides another selectable
source feeding the input channels through the
patchbay. Variable frequency sine wave, pink
noise, white noise or 1/3 octave band pass noise
can be selected. These can be used for system
line up and testing. The level is controlled using
the fader and mute function.
Source patchbays These connect the physical
inputs and outputs to the channels so providing a
flexible ‘virtual patchbay’ routing system. One
physical input can feed more than one input
channel. One output channel can feed more than
one physical output. Note that, as with any
physical patchbay, you cannot route two sources
into one channel, or two channels into one output.
Mix matrix This is the routing ‘heart’ of the
system fed by all 16 input channels, and feeding
all 16 output channels. It is known as a 16x16
crosspoint matrix. The signal can be switched or
have its level independently controlled at any
point. It is the matrix which provides the key to
independent multi-source zone routing and level
control.
The channel architecture illustrating the processing blocks is shown above.
For detailed instructions on using these please refer to the Help file which
comes with the iDR System Manager software.
DAC
OUTPUT
OUTPUT
ANALOG
PHYSICAL OUTPUTS
SILENCE
15+16
1+2
MONO
STEREO
FADER
OUTPUT CHANNELS
FADER
MUTE
+48V
NAME NAME
PEQ4
PINK NOISE
1/3 OCT BP
OSCILLATOR
WHITE NOISE
INPUT
-
+
+ -
L
R
MONITOR
ADC
ADC
FADER
MUTE
SIG GEN
FREQ
+
GAIN
8
EXPANDER
16
INPUT 9
PAD
ANALOG
INPUT
-
1
DELAY
SOURCE
LIMIT
ADC
M M
FILTER
16
M
ACTIVE MONITOR BUS
AMM
DUCKING
M
COMP GATE
GR
SIDECHAIN
ACTIVE
1
SEL
MUTE
M M M
FADER
M
PEQ8 DELAY
PAGER
BELL
LF SHELF
HF FILTER
LF FILTER
XOVER FILTER
HF SHELF
MIX
M M
MATRIX
M
PHYSICAL INPUTS INPUT CHANNELS
iDR NAME
PHONES TRIM
MUTE
DAC
SOURCE
DAC
R
L
OUTPUT
MONITOR
EXPANDER
LIMIT
GR
9
8
16
SOURCE
M M
1