Viewing Time vs Frequency in Simulink

Hi everyone,

I'm building a simple simulink model to view the Time vs Frequency plot of a chirp signal. May i know which is the appropriate blockset to connect from the chirp signal output?

Answer 1

[Paulo Silva]

This is the code just for MATLAB

t = 0:0.001:10;      % 10 seconds @ 1kHz sample rate
fo = 10; f1 = 400;   % Start at 10Hz, go up to 400Hz
y = chirp(t,fo,10,f1,'logarithmic');
spectrogram(y,256,200,256,1000,'yaxis')

Now if you really want to generate the chirp and see it just with simulink, put the chirp block on your model connect it to one to workspace block, make it output one array and choose the variable c.

Now go to simulink File, Model Properties, Callbacks and choose the StopFcn, paste the next come in the box

spectrogram(c,256,200,256,1000,'yaxis')

Now every time you run your simulation you get the frequency vs time plot automatically.

Answer 2

[Daniel Tay]

Thanks for your help :)