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Module Overview

Figures 17 and 18 show the system architecture of the mixer unit at the module level. The system is laid out in a modular fashion, such that it can be expanded and upgraded from an initial configuration. Audio input and output boards mounted to panel-mounted aluminum brackets, allow reasonably simple upgrades. Audio mix PC boards can be added to the system as well, however this upgrade process is slightly more involved, as a different wiring harness is needed to connect to the boards.

**Figure 17:** Mixer unit, module-level system diagram (analog).
$\begin{figure} \psfig{file=fig/mixer-modulelev-an.eps,width=6in,height=7in} \end{figure}$

**Figure 18:** Mixer unit, module-level system diagram (digital).
$\begin{figure} \psfig{file=fig/mixer-modulelev-dig.eps,width=6in} \end{figure}$

This particular scheme of modularity was chosen for two main reasons. First, it extends the ability to expand and upgrade the system. Secondly, there are substantial manufacturing cost reductions involved due to the duplication of several of the modules.

Steve Richardson 2000-07-06

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