The SignalSource, Amplifier, HighPassFilter, and LowPassFilter blocks are classifiers of ss, ampfr, hpfvar and lpfvar instance specifications. Each have a slot with numeric value defined that stays constant throughout each simulation run and are required to solve the constraints. The value of slot alfa in each of the hpfvar and lpfvar instance specifications are required to determine the cut-off frequency for the signal filters. The value of slot g in ampfr instance specification is required to determine the gain factor of the Amplifier block. The value of slot amp in the ss instance specification determines the amplitude of the generated signal.
Three initial values required for the simulations are determined by instance specifications that are set in the two filter part properties and amplifier part property (parts hPF, lPF and a) in the SignalProcessor internal block diagram. Instance specifications hpfvar, lpfvar and ampfr are assigned as the default values to each of these part properties hPF, lPF and a, respectively. These specifications assign an initial value for the unit-less variable x in each part that is required for filtering the signal in the signal processor at the start of the simulation. But as the simulation runs, these values do change.
