How to generate a dirac comb in Simulink

Hello,

I want to generate a dirac comb with a certain frequency in Simulink.

My first attempt was using a sampled based pulse generator with a ratio of Period/ Pulse width = 1000. With a sample time of 10^-6 s, this make a frequency of fc=10 kHz.

While in time scope the dirac comb shows a satisfied form (attachment), it differs in the frequency domain (using a spectrum analyzer) from the expected form.

Instead of with a dirac for every n*fc, it shows rather a sinc-function (attachment).

Can s.o help me with this issue? Would be more than happy.

Best regards

Johannes

[Birdman]

Can you share your Simulink model attached?

[Johannes Siegel]

yes, sure.