iLive Reference Guide – Hardware
Part 1 - 36
AP6526-1 iss.5
MADI Operating modes
Dual Link mode
The card supports two separate MADI BNC
links letting you connect to two separate devices simultaneously.
Make sure the
MIXER SETUP
/
Mixer Pref
screen Redundant Link
Option is set to ‘Off’.
Sources to the iLive channels can be patched from either
LINK 1
or
LINK 2
MADI stream in blocks of 8. First, use the
MIXER SETUP
/
Mixer Pref
screen to set up which MADI link is made available as a
selectable source to the blocks of 8 iLive channels. Next, select
MADI as the source to individual or a range of channels using their
PREAMP
screens or the
MIXER SETUP
/
Mixer Pref
/ Quick
Source Setup
screen.
Outputs to the MADI links are patched using the
OUTPUTS
screen.
Select the source from the drop down menu. The same outputs are
broadcast on both MADI
LINK 1
and
LINK 2
.
Redundant mode
Set the
MIXER SETUP
/
Mixer Pref
screen
Redundant Link Option to ‘On’. This configures
LINK 1
and
LINK 2
as a redundant pair. Audio and clock will continue without
interruption if one of the cables fails or is unplugged.
AUX modes
A 5
th
BNC socket supports 4 modes, greatly
increasing system flexibility. Set the mode using the
MIXER SETUP
/
Mixer Pref
screen.
OUT 1 mirror - Duplicates the output stream appearing at the MADI
LINK 1
output. Useful for splitting signals to multiple devices, for
example, mic splitter and recording.
IN 1 thru - Duplicates the input stream appearing at the MADI
LINK
1
input. Allows daisy chaining of signals to an unlimited number of
devices. The signal is fully reclocked and buffered for optimal
reliability, and will automatically switch to
LINK 2
if
1
fails in
redundant mode.
WordClock IN - Provides a word clock input to sync the system
from an external ( 48kHz ) source. Use the
MIXER SETUP
/
Mixer
Pref
screen to choose which MADI socket to sync off, then set
Remote Port B as the iLive sync source.
WordClock OUT - Provides a standard 48kHz word clock output to
allow other systems to sync from the iLive system, useful when
connecting to 3
rd
party devices which may not be able to sync from
the MADI stream.
Cables
Two 75 ohm coaxial cables with BNC connectors are
required for each link, one for each direction of audio. The MADI
standard supports up to 50 meters (165 feet). However, the
M-
MADI
card features an equalizing receiver circuit, originally
designed for HD video, allowing greatly increased sensitivity and
noise rejection. Because of this, connecting two A&H MADI cards
together allows cable runs in excess of 150m (3 times the standard)
depending on cable type. All inputs, including word clock, are AC-
coupled, to avoid potential ground loop problems.
Allen & Heath have tested and recommend Belden 1505A 75 ohm
coaxial cable for use with MADI. Other cable that meets the same
specification as this cable may be used too. For more information
on cables please refer to the Allen & Heath web site:
www.ilive-digital.com/cables.html
Specification
MADI inputs x2
High sensitivity,
equalising receivers. Auto detects 56 or 64
channels. 24-bit. AC coupled.
MADI outputs x3
Standards compliant,
low jitter transmitters. 64 channels, 24-bit.
Word clock input
High sensitivity
(>200mV pp) with 75 ohm termination. AC
coupled.
Word clock output
5V pp through 75
ohm termination. AC coupled.
Status indicators
AUX modes, Per MADI
input = Link/Activity (yellow), Stream Error
(red)
Sync sources
MADI input LINK 1, LINK 2,
AUX word clock.
Audio clock sync range
48kHz +/-
100ppm
Cables
75 ohm coaxial, BNC connectors.
Max:
