Communication Electronics Chapter 1 Quiz

Vacuum tubes were replaced by transistors in the late 1950s and early 1960s, and transistors are now being replaced by integrated circuits.

Multipurpose large-scale circuits that are replacing transistors.

Systems using digital signals are increasing in number and are important in modern electronics.

Basic principles of electronic communications are introduced in the book to expand knowledge.

Altering a signal wave to transmit information over a channel.

The range of frequencies used to transmit a signal.

Examining signals in frequency and time domains to understand characteristics.

Method for breaking down complex signals into simpler sine waves, used for analyzing non-sinusoidal waves.

A signal that varies continuously, like a human voice or a music wave.

A signal that consists of discrete values, like a series of 1s and 0s.

A high-frequency signal used to carry information.

The information that is added to the carrier signal.

The resulting signal after information is added to the carrier.

Low-frequency signals can't travel long distances through the atmosphere, so they are superimposed onto a high-frequency carrier signal.

The three predominant methods for multiple accessing are frequency-division multiple accessing (FDMA), time-division multiple accessing (TDMA), and code-division multiple accessing (CDMA).

A fiber optic communication system uses light pulses to transmit information through thin strands of glass or plastic called optical fibers.

Light propagates through an optical fiber by total internal reflection, bouncing off the fiber's inner walls and staying within the fiber.

Common light sources used in fiber optic communication systems include LEDs (light-emitting diodes) and lasers. LEDs are less expensive, while lasers can transmit information over longer distances with higher speeds.

Light detectors used in fiber optics convert light signals back into electrical signals. Examples include photodiodes and PIN diodes.

A Smith Chart is a graphical tool used for transmission line calculations. It represents complex impedance values on a polar coordinate system.

The Smith Chart is used for calculations like input impedance, quarter-wave transformer matching, and shorted stub matching, all essential for impedance matching in transmission lines.

Electronic communications is the process of transmitting, receiving, and processing information using electronic circuits. It involves the use of various technologies to send and receive signals.