Instructions for Amplitude Modulation (AM)

Step 1: Click on 'Generate Message' button to generate input message signal
Step 2: Then click on 'Generate Carrier' button to generate carrier signal. The carrier frequency has to be more than the message frequency and You can change frequencies using sliders
Step 3: Click on 'Generate Amplitude Modulated Signal' button to generate Amplitude Modulated Signal
Step 4: Click the 'Show Frequency Spectrums' button to view the AM spectra.
Here, the modulation index is defined as the ratio of the message signal amplitude to the carrier signal amplitude. You can adjust both values.

Message Signal Amplitude (Am)

Message Frequency (Hz)

Carrier Signal Amplitude (Ac)

Carrier Frequency (Hz)

500

Step 1:

Step 2:

Step 3:

Step 4:

Instructions for Amplitude Demodulation

Step 1: Tunable LPF's Cutoff frequency works in accordance with the Message frequency
Step 2: You can Demodulate the AM Signal clicking on the 'Perform AM Demodulation' button
Step 3: Click on the 'Show Frequency Spectrums' button above to see spectrums of the message, AM modulated and demodulated signal. The frequency spectra is shown for a modulation index of 1.

Cut-off Frequency