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:
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