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DACS: Audio Mix Module

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Audio Mix Module

Four audio mix modules are used in the prototype mixer unit. Figure 83 shows the silkscreen/assembly layer for this PC board. Table 6 shows the bill of materials for the audio mix board. Figures 84 and 85 show the top and bottom routing layers for this board. Note the presence of surface-mount components on the top routing layer.

**Figure 83:** Audio mix module PCB, silkscreen/assembly drawing.
$\begin{figure} \psfig{file=pcb/mix-silk.eps,width=5.5in,height=6.5in} \end{figure}$

Table 6: Audio Mix Module, bill of materials.

REFDES	QTY	DESCRIPTION
R1 - R8	8	10K 1% metal film
C1 - C10	10	0.1uF monolithic
C11,C12	2	10uF electrolytic
U1 - U4	4	SSM2163 (SOIC-28)
U5	1	GAL16V8
U6	1	74LS373
U7	1	74LS04
J1 - J4, J7 - J9	8	16-pin DIP header
J5	1	Molex Mini-Fit Jr. 8-circuit right angle
J6	1	20-pin DIP header

**Figure 84:** Audio mix module PCB, component-side routing.
$\begin{figure} \psfig{file=pcb/mix-top.eps,width=5.5in,height=6.5in} \end{figure}$

**Figure 85:** Audio mix module PCB, solder-side routing.
$\begin{figure} \psfig{file=pcb/mix-btm.eps,width=5.5in,height=6.5in} \end{figure}$

Next: Bus Combiner and Switcher Up: Mixer Unit Previous: Audio Input Module Contents

Steve Richardson 2000-07-06

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