Nevion AV-HD-XMUX - Manual (Page 12)

AV-HD-XMUX (-T/R) / AV-SD-XMUX (-T/R) Rev. L
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3 Configuration
The XMUX embedding core can be considered as an 18x16 stereo audio router and a 5x4
group router.
The group router is used to transport or shuffle groups without introducing any additional
delay.
The inputs or sources in the stereo router are from the de-embedded audio groups, the AES
inputs, the delay line outputs and the two built in generators.
The stereo router outputs or destinations are the groups of embedded audio in the output
video, the AES outputs and the delay line inputs.
A normal de-embedder configuration would route the de-embedded audio to the AES
outputs.
A normal embedder configuration would be to route the AES inputs to the appropriate
embedder group outputs.
The AV-HD-XMUX module can do both at the same time!
Many other configurations are possible and the module may be dynamically controlled as an
18x16 audio router via the system controller, GYDA.
Full control of the module is performed with the GYDA system controller. Controls only
possible with GYDA are:

The data transmission parameters and channel selection.

The output processing of each stereo signal (LR, RL, LL, RR, MS, Sum, ØLR, LØR).

The delay lines delays and routing.

Video and audio generator configuration.
3.1 DIP switch routing
Full hardware control of all of the parameters in the module would require either, a
complicated menu type of control interface with a display and control buttons; or an
enormous number of switches. In many cases, most of the parameters will not be changed
from the default settings. It was decided to control only the most used parameters with
switches. This still requires the use of 24 switches.
The switches are only read during the power-up process, if SW1.8 (Load DIP config) is in the
on position (see 3.2.2) and if there is no GYDA connected.
There are not enough switches on the module to allow full stereo routing configurations.
Groups of four channels are routed together as units, for example: AES input channels 1&2,
embedded audio group 1.
3.1.1 Destinations
SW1 SW2 SW3
Group1 Group2 * * Group3 Group4 * * AES1&2 AES3&4 * *
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Table 1: Routing control switches
The switches control the routing of signals to the outputs or destinations. There are four
embedded audio groups and two sets of AES outputs, AES outputs 1&2 and AES outputs
3&4.