GUIDE TO INSTALLATION AND OPERATION
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| MDX-3901
1
MDX-3901 12G/Quad Link 3G/3G/HD 16 Audio Channel AES/MADI
Embedder/De-embedder
1.1 Introduction
The MDX-3901 is an advanced, high-quality audio processor, which can embed up to 16 audio channels from a
combination of eight discrete AES and/or one MADI signal into a 12G/Quad Link 3G/3G/HD SDI signal or de-embed up
to 16 audio channels into eight AES and one MADI signal from a 12G/Quad Link 3G/3G/HD SDI signal.
When configured as an embedder, each AES input can accept different sample rates, or even asynchronous audio, and
will be resampled at 48 kHz by a sample rate converter, which can be manually or automatically disabled in the
presence of non-PCM audio. The MADI input supports a 64-channel payload at the industry standard 48 kHz sampling
rate synchronized to the SDI signal. The MDX-3901 embedder can simultaneously process up to 16 channels of audio
selected from 80 channels inputs - 16 from AES and 64 from MADI. Functions include channel shuffling, mixing and
probing. Each channel can be delayed independently to correct any lip sync issues. All 16 audio channels can be mixed
and shuffled to provide 16 channels for embedding in the SDI video output. A single-link video input will be distributed to
outputs 1 & 2. When genlocked to the external reference input or through the frame reference using the internal URS
signal, the MDX-3901 can handle video hot switches at the input without losing sync at the output. In the absence of a
video input, the card can still output synchronous video and embed the discrete AES/MADI audio. The MDX-3901 can
also embed linear timecode (LTC) as ancillary timecode (ATC) in 12G/Quad Link 3G/3G/HD.
When configured as a de-embedder, the MDX-3901 can simultaneously process up to 16 channels of audio from the
embedded SDI input. Functions include channel shuffling, mixing and probing. Each channel can be delayed
independently to correct any lip sync issues. All audio channels can be mixed and shuffled to provide 16 channels on the
discrete AES outputs and on the first 16 channels of the MADI output. A single link video input will be distributed to
outputs 1 & 2. When genlocked to the external reference input or through the frame reference using the internal URS
signal, the MDX-3901 can handle video hot switches at the input without losing sync at the output. The MDX-3901 can
de-embed ancillary timecode (ATC) in 12G/Quad Link 3G/3G/HD and provides a linear timecode output (LTC).
A fiber input and/or output cartridge is offered as an option on some rear modules. Once an appropriate fiber cartridge is
installed, the input or outputs are selectable through the iControl interface. The input of the card allows you to select
between fiber and copper inputs. The outputs are via copper and fiber simultaneously (when equipped with a fiber
cartridge).
