Enrolment options
Fundamentals of Electronic Communication
Course modified date: 22 June 2024
in this course, learn about the the fundamentals of electronic communication.
Introduction
Sine waves are used in math and physics to represent waves. See below for some key definitions that will be used throughout the session:Frequency (f)
· This is the number of cycles per second measured in hertz (Hz)
· 1 Hz = 1 cycle per second
Amplitude (A)
· The height of a cycle
Phase (Φ)
· The relative value of a variable at a point in a cycle
Wavelength (λ)
· The physical distance over which a cycle repeats
Relationships
The wave speed (c) of electromagnetic (EM) radiation is 300,000 km/s (the ‘speed of light’).So, as the wave speed (c) is constant:
· Lower frequencies always have longer wavelengths
· Higher frequencies always have shorter wavelengths
Wave speed (c), frequency (f) and wavelength (λ) are related and can be represented by a formula triangle.
\( f= \frac{c}{ \lambda } \)
Where: c = wave speed, f = frequency and λ = wavelength
\( c \equiv f \times \lambda \)
Where: c = wave speed, f = frequency and λ = wavelength
\( \lambda \equiv \frac{c}{f} \)
Where: c = wave speed, f = frequency and λ = wavelength
Guests cannot access this course. Please log in.