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PG2-MADI-C-FX User Guide
5
Device Details
5.1
Fiber Optic Connection
The ProGrid uses a digital Time Division Multiplex technology (TDM) with a fiber channel based 8B10B-NRZI-
coding. Static time slots guarantee the synchronous transmission of all channels at any time with no demand for
dynamic bandwidth. All signals attached to the audio, video, word clock and auxiliary ports of the device are
transmitted simultaneously on one fiber. The second fiber of one LINK-Interface is used to receive data. The
second LINK-Interface has the same features as the first; therefore one of the LINK-Interfaces can always be used
for redundancy.
5.2
MADI Ports
MADI (Multichannel Audio Digital Interface) was first standardized by the AES10-1991 for the transmission of 56
digital audio channels in one frame. The revision AES10-2003 enhanced the number of channels to maximal 64
digital channels. The PG2-MADI-C-FX supports the formats according to both standards. If an external device
cannot handle a 64 channel MADI frame, the ports can be set to the ‘old’ AES10 standard with OPTOCORE
CONTROL.
The PG2-MADI-C-FX is equipped with two MADI input ports and two MADI output ports, each transmitting or
receiving up to 64 audio channels. This amounts to a total number of up to 128 input channels and 128 output
channels per device. The interfaces are SC multimode optical connections.
The number of input and output channels exchanged at each port and transmitted on the fiber optical connection
can be defined with OPTOCORE CONTROL. This keeps the matrix easy-to-handle and the quantity of channels
per device in the network flexible. Using one PG2-MADI-C-FX does not automatically mean that 128 channels are
allocated on the fiber connection. The user is free to decide how many channels are needed for the transport of
MADI in groups of eight. LEDs on the front panel of the PG2-MADI-C-FX indicate the number of channels received
at the MADI input ports. The MADI output ports always transmit the complete frame with 56 or 64 audio channels
according to the standard. The inactive channels have all bits set to zero.
5.3
SANE Ports
PG2-MADI-C-FX is equipped with two RJ45 200MBit SANE Ports for 64 channels synchronous audio + 100MBit
Ethernet.
5.4
RS485 Auxiliary Ports
The auxiliary ports provide four RS485 interfaces to establish a maximum of four half-duplex or two full-duplex
connections between the devices. A wide range of bi-directional and unidirectional standards can be connected,
such as RS485, CAN-Bus (bi-directional), or RS422, DMX, MIDI (unidirectional). The interfaces will sense
automatically whether they send or receive control data. OPTOCORE CONTROL software is used for setting the
destination of each interface.
5.5
Word Clock
The word clock input can be used to connect an external word clock source. An alternative clock source is the
internal word clock. The synchronous data transmission with no buffers demands an absolute stable clock
throughout the 2 Gbps network. Based on this clock the word clock available at the outputs is of superior quality
with extremely low jitter.
