Chapter 5: Pro Tools | MTRX Back Panel Connections
23
Digital I/O Connections
MTRX Dual MADI I/O Expansion Card
The MTRX Dual MADI I/O expansion card can be installed with one or two “Small form-factor pluggable” (SFP) transceiver modules.
The SFP modules are standard types which support coaxial as well as optical and interfaces with LED or Laser diodes, and various
wavelengths and fiber types. Each SFP module has a receiver and a transmitter part, and can be used for MADI audio I/O. The right part
of the SFP connector is the receiver and the left part is the transmitter. Note that only optical MADI connections support MTRX Hotlink
functionality.
AES11 Sync Input, Female XLR Connector
Pin 1
TX. +
Pin 2
TX. –
Pin 3
RX. +
Ethernet, RJ45 Connector, Gigabit
Pin 1
BI_DA+
Pin 2
BI_DA–
Pin 3
BI_DB+
Pin 4
BI_DC+
Pin 5
BI_DC–
Pin 6
BI_DB–
Pin 7
BI_DD+
Pin 8
BI_DD–
Optical wavelengths of 850nm and 1300nm are commonly used for multi-mode MADI cards. 1300nm uses 100BASE-FX cable and
allows for cable runs as far as 6,600 feet. 850nm is a lower cost alternative that uses 100BASE-SX cable, due to the use of short wave-
length optics (which are significantly less expensive than the long wavelength options used in 100BASE-FX), with maximum cable
runs up to approximately 1,000 feet.
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