12 Questions
What is the main difference between analog and digital signals?
Analog signals represent information using continuously varying voltage or current, while digital signals change in discrete increments.
What is the unit used to measure the number of cycles of a repetitive wave occurring in a given time period?
Hertz (Hz)
How is wavelength related to frequency?
Wavelength and frequency are inversely proportional.
What does modulation do to information signals?
Modulation makes information signals compatible with transmission mediums.
What does baseband transmission involve?
Converting intelligence signals directly into electronic signals compatible with the medium.
What is the purpose of multiplexing in signal transmission?
To allow multiple signals to be transmitted simultaneously over a single medium.
What type of signals change in discrete increments and typically use binary codes?
Digital signals
Which unit is used to measure the number of cycles of a repetitive wave occurring in a given time period?
Hertz
What is the purpose of modulation in signal transmission?
Making information signals compatible with transmission mediums
What does wavelength represent in relation to a wave's cycles?
The distance between corresponding points of two consecutive cycles
What is the main difference between analog and digital signals with regard to their variation?
Analog signals are continuously varying, while digital signals change in discrete increments
What allows multiple signals to be transmitted simultaneously over a single medium?
Multiplexing
Study Notes
Signal Types
- Analog signals: continuously varying voltage or current signals, representing information like voice or video, e.g., sine waves.
- Digital signals: change in discrete increments, typically use binary codes, e.g., Morse code for telegraphy and ASCII for computer data.
Frequency and Wavelength
- Frequency: the number of cycles of a repetitive wave occurring in a given time period, measured in Hz (Hertz).
- One cycle per second is equal to one hertz (Hz).
- Wavelength: the distance between corresponding points of two consecutive cycles of a wave.
- Wavelength is inversely proportional to frequency.
Transmission Concepts
- Modulation: makes information signals compatible with transmission mediums.
- Multiplexing: allows multiple signals to be transmitted simultaneously over a single medium.
- Broadband transmission: the process of modulation, where the baseband signal modifies the carrier signal before transmission.
- Baseband transmission: converts intelligence signals (analog or digital) directly into electronic signals compatible with the medium.
Test your knowledge on the differences between analog and digital signals, including examples of each and key concepts like frequency and wavelength. Learn about how analog signals represent continuously varying information, while digital signals change in discrete increments.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
