Signals and pulse modulation Flashcards
(12 cards)
What is the primary difference between analogue and digital signals?
Analogue signals transmit information as a continuous set of values, while digital signals transmit information as a sequence of discrete values.
What type of waveform do analogue signals typically represent?
Analogue signals are shown as sinusoidal waves.
What type of waveform do digital signals typically represent?
Digital signals are shown as square waves.
What is a characteristic of analogue signals compared to digital signals?
Analogue signals are higher density and present more detailed and accurate information.
What disadvantage do analogue signals have?
Analogue signals are more likely to suffer from the effects of noise.
What is a key advantage of digital signals?
Digital signals take up less bandwidth and are easier to understand, transmit, and decode.
Fill in the blank: Pulse width modulation (PWM) varies the ______ of the pulsed carrier signal according to the amplitude of the message signal.
[width]
Fill in the blank: Pulse amplitude modulation (PAM) varies the ______ of the pulsed carrier signal according to the amplitude of the message signal.
[amplitude]
What is modulation in the context of control systems?
Modulation is the process where data is converted into electrical signals suitable for transmission.
True or False: Digital signals can only take on one of two values.
True
What are some applications best suited for analogue signals?
Examples include audio signals, radio waves, and other continuous data transmissions.
What are some applications best suited for digital signals?
Examples include digital communication systems, computers, and digital audio.
