Allen&Heath M-MADI User Manual

Page 2

digital notes

iLive Surface to MixRack audio link with redundancy plus 30 record feeds

Here M-MADI is used to form the two-way link between the iLive modular surface and the iDR10 MixRack. Both need to be fitted with RAB2
remote audio module and M-MADI option cards in Port-A. 4 cables are used: IN/OUT on Link 1, and IN/OUT on Link 2. Redundant mode is
chosen from the iLive touch-screen, this will ensure continuous audio signal and clock sync in the case of one link being broken. The AUX
BNC can be useful to provide some record feeds from the MixRack or Surface (ch1-32 are reserved for I/O at the surface, ch63/64 are PAFL).
Set the AUX BNCs to duplicate the signals present at the IN sockets of the surface M-MADI, and to mirror the OUT signals at the MixRack M-
MADI. Sources for the channels and AUX BNC can be configured in the Port-A tab on the OUTPUTS page of the touch-screen.

M-MADI SPECIFICATIONS

Ultra high-sensitivity inputs: An equalizing receiver circuit, originally designed for HD video, allows error-free reception of signals where a
normal receiver would not even detect that a signal is present. As a consequence, connecting two A&H MADI cards together allows cable
runs in excess of 150m

[1]

(triple the standard!), and electrical noise immunity is increased all round. All inputs, including the word clock input,

are also AC-coupled, to avoid potential ground loop problems.
Flexible Syncing: Users may select either of the input MADI streams (Link 1 or Link 2), or the ‘Aux’ BNC word clock input, when selected, as
the system clock source. Note that iLive is a 48 KHz system, and any selected clock sources must be 48 KHz

[2]

[1] Performance depends on cable type used. See

http://www.ilive-digital.com/cables.html

for cable recommendations.

[2] iDR-10 and iDR-0 users whose systems have been fitted with M-RAB2 may select a wider lock range; see the appropriate documentation for details.

[3] Word clock source termination can be turned off via a jumper setting to support some older devices with CMOS word clock inputs.

MADI-2 in/out

MADI-1 in/out

MADI-Aux

TCP/IP

MADI Inputs x2

Ultra high-sensitivity equalizing receivers. 56 or 64 channels (auto detect), 24 bit.
(AC-coupled).

MADI Outputs x3

Standards compliant, low jitter transmitters. 64 channels, 24 bit. (Including ‘Aux’
BNC).

Word clock input

High-sensitivity down to 200 mV peak-peak with 75R termination. (AC-coupled).

Word clock output

5V peak-peak through 75R source termination

[3]

Status indicators

Per MADI Input: link/activity (yellow), Stream Error (red).

‘Aux’ BNC mode indicators (yellow).

Sync Sources

MADI Link 1, MADI Link 2, Word clock (via ‘Aux’ BNC).

Audio Clock Sync range

48 KHz ±100ppm

[2]

Cable length

[1]

150m (A&H ↔ A&H)

150m (3

party → A&H)

50-100m (3

party ↔ A&H) (consult 3

party documentation)

300m (A&H ↔ A&H, mains filters on both devices)