Communications Blockset

Variables in the Model

When you load the model, it creates several variables, using the PostLoadFcn model callback parameter. Besides the variables N and M, there are:

• fr = frequency of the reference signal
• fq = quiescent frequency in the Voltage-Controlled Oscillator (VCO) block
• sen = Voltage-Controlled Oscillator input sensitivity

The model initially assigns values to these variables as follows: N = 10, M = 3, fr = 30 MHz, fq = 30 MHz and sen = 40 MHz/V. The frequency of the synthesized signal will then be 100 MHz. After running the simulation with these values, you can later change them if you want to experiment with the model.

Phase-Locked Frequency Synthesis Demo

Running the Simulation