System object: comm.DiscreteTimeVCO
Generate variable frequency sinusoid
Y = step(H,X)
Y = step(H,X) generates a sinusoidal signal, Y, with frequency shifted, from the value you specify in the QuiescentFrequency property, to a value proportional to the input signal, X. The input, X, must be a double or single precision, real, scalar value. The output, Y, has the same data type and size as the input, X.
Note: The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties and input specifications, such as dimensions, complexity, and data type of the input data. If you change a nontunable property or an input specification, the System object™ issues an error. To change nontunable properties or inputs, you must first call the release method to unlock the object.