## digital_signal_alignment.png The image is a detailed chart that categorizes different types of digital signals based on their timing and representation characteristics. It is divided into six sections, each with its own title and examples. ### Top Row: 1. **Timing Purist**: This section describes digital signals that spend most of their time at DC (direct current) levels, transitioning between these levels in a relatively short time. - Example: UART (Universal Asynchronous Receiver/Transmitter). The chart shows the waveform for UART with transitions occurring at specific points. 2. **Timing Neutral**: Here, digital signals are always in a defined state or transitioning between defined states. - Example: A picosecond pulse is shown as an example of a signal that must be in one of two states (high or low) and does not spend time in any intermediate state. 3. **Timing Rebel**: This section includes digital signals with no particular timing requirements, meaning they can transition at any point. - Example: A sawtooth wave is shown as an example where the signal transitions continuously without specific timing constraints. ### Bottom Row: 1. **Representation Purist**: Digital signals in this category must have two discrete voltage levels (low and high) to directly express a discrete set of symbols. - Example: PAM4 (Pulse Amplitude Modulation 4) is shown with its waveform, which uses four distinct amplitude levels. 2. **Representation Neutral**: This section includes digital signals that can represent any arbitrary signal level but must directly express a discrete set of symbols. - Example: A DAC (Digital-to-Analog Converter) playing PCM audio is an example where the signal can take on various voltage levels to represent different audio samples, yet it still represents a discrete set of symbols. 3. **Representation Rebel**: Digital signals in this category are not restricted by any specific voltage level and can consist of arbitrary signal levels. - Example: 10kV DC (Direct Current) is shown as an example where the signal has a fixed high voltage, but it does not have to be limited to two discrete levels. Each section includes diagrams or text that illustrate examples of digital signals fitting into each category. The chart helps in understanding how different types of digital signals can vary based on their timing and representation characteristics. This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.