The following schematic uses Tone (lookup/sine), Limiter, Output, and Schematic Terminal blocks. The red pins, which are unnecessary to the application, are sinked using the terminal block.
The following example uses Simulation Stimuli, Simulation Probe, T Connection and Schematic Terminal to produce the frequency response of General (1st-Order), General (2nd-Order) , and Deemphasis filters set at their default values. (Note that you have to press the Stimuli button to see the graphs.)