- A constant block may be used for a constant frequency.
- For a frequency that varies over time, a sine wave block can create a signal with changing frequency.
- https://www.mathworks.com/help/simulink/slref/sfunction.html?searchHighlight=s%20function&s_tid=srchtitle_support_results_1_s%2520function
- https://www.mathworks.com/help/simulink/slref/matlabfunction.html?searchHighlight=matlab%20function&s_tid=srchtitle_support_results_4_matlab%2520function