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Introduction
MUX-8552A User Manual (Iss. 01)
MUX-8552A Overview
The RossGear MUX-8552A AES/EBU Embedder/Multiplexer is a broadcast quality modular product
used to write 20-bit AES audio streams (SMPTE 272M-A) to a 525 or 625 standard 270MB/s SDI
video signal. The MUX-8552A will embed two 48kHz AES-3id streams (1 group) and output two
copies of the embedded SDI signal. The RossGear MUX-8552A is for use in 75-ohm coaxial SMPTE
276M and AES-3id systems.
An SDI signal and 1 or 2 AES-3id signals are input through BNC connectors on the rear of the frame.
The MUX-8552A accepts both 525 and 625 format (SMPTE 259M-C) signals at 270Mb/s. Visual
indicators on the card edge provide indication of the presence of SDI and AES inputs. The MUX-
8552A provides automatic equalization for 300m of Belden 8281 cable. Two SDI outputs are
provided.
The MUX-8552A can embed one AES group into any one of the four AES groups available. The
group to be embedded is selected via a card edge jumper. Front panel LED’s provide information on
which groups are already present in the incoming SDI stream. The ability to overwrite an incoming
group is available through jumper selection. The MUX-8552A has been designed with the ability to
report a variety of AES signal errors including: no lock, biphase coding, parity, CRC check, sample
slip, and validity errors. These errors are indicated on a card edge (Error) LED. In addition, there is
SMPTE 269M fault reporting output to the backplane of the Ross digital rack frame.
The MUX-8552A is also available as the MUX-8552A-C version. The C version comes pre-
assembled from the factory with the AAM-8552A A/D daughter card, and the CON-8552 companion
rear connector module, which provides four balanced analog audio inputs instead of the AES digital
audio inputs.
The MUX-8552A fits into the Ross DFR-8110A or DFR-8104A digital frames. It provides system
builders the ability to easily distribute embedded digital audio in an SDI facility. The MUX-8552A is
part of a growing line of RossGear AES solutions, including distribution, conversion and monitoring.
The MUX-8552A also fits Leitch
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6800 series frames.
Designed and manufactured to meet the highest quality broadcast industry standards, the RossGear
MUX-8552A is an ideal, cost effective solution for digital audio embedding.
MUX-8552A-C Overview
The RossGear MUX-8552A-C version, which comprises the MUX-8552A, the AAM-8552A
(daughter card), and the companion CON-8552 (connector adapter), is a broadcast quality modular
product used to allow four analog audio inputs to be embedded into a 525 or 625 SDI stream. The
AAM-8552A is a sub-module daughter card that plugs onto the top of the MUX-8552A RossGear
AES multiplexer card. The CON-8552 is a plug-on connector to the BNC module that connects to the
rear of the Ross DFR-8110A or DFR-8104A digital frame.
The AAM-8552A uses state of the art analog to digital converters that provide 24-bit resolution. A
coarse level adjustment (headroom) jumper (18dB or 24dB) and fine adjustment potentiometers (+/-
3dB, one for each channel) on the AAM-8552A, are provided to precisely match the converter to your
facility’s house reference audio level.
The AAM-8552A / CON-8552 is part of a growing line of RossGear AES solutions, including
distribution, conversion and monitoring. Designed and manufactured to meet the highest quality
broadcast industry standards, the RossGear MUX-8552A / AAM-8552A / CON-8552 is an ideal, cost
effective solution for digital and analog audio multiplexing requirements in your facility.
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Leitch is a trademark of Leitch Technology Corporation
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