Instructions for Pulse Amplitude Modulation (PAM)

Step 1: Click on 'Generate Message' button to generate input message signal
Step 2: Then click on 'Generate Carrier' button to generate carrier signal. You can change the message and carrier signal frequencies from the input field. The carrier frequency has to be more than the message frequency
Step 3: Click on 'Generate PAM Signal' button to generate Pulse Amplitude Modulated (PAM) Signal
Step 4: Click the 'Show Frequency Spectrums' button to view the PAM spectrum

Message Frequency in Hz:

Square Carrier Frequency in Hz:

Instructions for Pulse Amplitude Demodulation

Step 1: The reconstruction filter is used to recover the original message signal from the sampled PAM signal (typically by multiplying with the carrier and then low-pass filtering)

Step 2: You can Demodulate the PAM Signal clicking on the 'Demodulate PAM Signal' button

A reconstruction filter is a low-pass filter (LPF) with cutoff at or just above the message frequency which passes only the baseband and blocks higher-frequency copies

Tip: Pulse Amplitude Modulation (PAM) settings auto-transfer to the Pulse Amplitude Demodulation tab. No need to re-enter values. Keep both tabs open, or demodulate immediately after modulation.