Figure 46: Signal processor example (MOCKUP)

This is not a screenshot of the spec document figure, it's actually been redone in a drawing program (as you can tell from the sophisticated high-pass and low-pass filter icons).

The spec example then separates the signal processing aspects (encapsulation) from the source and sink via a test bed, with a reusable input and output for a signal processing unit.

The mixer turns out to be a simple average of the inputs from the high-pass and low-pass filters, so in fact (because the filters are not chained) some high and low will always get through.

In the spec the IBDs representing the TestBed context block and SignalProcessor and its components are shown first, but in this trail we'll look at the BDDs for the component blocks first.

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BDD: Figure 49: Total system (source to sink) blocks, ports, & component properties

Notes

Snippets (quotes/extracts)

[SysPhS-1.1] A.3.2 System being modeled The signal processor and its testbed have a wave generator, an amplifier, high-pass and low-pass frequency filters, a mixer, and a signal sink, see Figure 46.