Originally featured on BroadcastEngineering.com
Nucomm offers low latency audio multiplexer for IFB

Nucomm, part of The Vitec Group’s RF Extreme business unit, has announced its ProQ Low Latency Audio Multiplexer (LLAM), which has been optimized to work with the company’s ProQ receiver to facilitate multiplexing of audio into the ATSC signal.

With the ability to multiplex as many as eight IFB channels while only occupying 200kb/s of the ATSC signal, the ProQ LLAM supports up to eight GPI signals in a single rack box to provide functions such as tally light control. The incoming audio is encoded by MPEG Layer 1/Layer2 audio encoders, multiplexed with the GPI, Ethernet and RS232 signals, and then inserted into the transport stream. A breakout box includes audio and GPI signals, connecting to the ProQ LLAM via a rear-panel 50-pin connector. The ProQ LLAM also features a full-color OLED panel for system monitoring and control.

When the ProQ LLAM is utilized in conjunction with the ProQ Digital IFB receiver, extended features are optionally enabled. These optional features include full AES 128 or 256 encryption of the audio and data channels, as well as a general purpose contact closure, which can facilitate remote tally indication and the ability to push down future software enhancements over the ATSC channel. To facilitate remote controls, Ethernet and RS232 encapsulation can be added as an option.

When used together, the ProQ LLAM and the ProQ Digital IFB receiver form a complete digital IFB system.

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