Pulse Amplitude Modulation (PAM) is a technique used in signal processing where the amplitude of a series of pulses is varied to represent information. In this method, each pulse corresponds to a specific value of the signal being transmitted, allowing for the encoding of data in a straightforward manner. PAM is commonly used in digital communication systems, such as telecommunications and data transmission. PAM can be classified into different types, including binary PAM and multi-level PAM. In binary PAM, there are two amplitude levels, while multi-level PAM can have several levels, increasing the amount of data transmitted per pulse. This modulation technique is essential for efficient data transfer in various applications, including audio and video transmission.