In what century did electronic communication begin?
Name the four main elements of a communication system, and draw a diagram that shows their relationship.
List five types of media used for communication, and state which three are the most commonly used.
Name the device used to convert an information signal to a signal compatible with the medium over which it is being transmitted.
What piece of equipment acquires a signal from a communication medium and recovers the original information signal?
What is a transceiver?
What are two ways in which a communication medium can affect a signal?
What is another name for the communication medium?
What is the name given to undesirable interference that is added to a signal being transmitted?
Name three common sources of interference.
What is the name given to the original information or intelligence signals that are transmitted directly via a communication medium?
Name the two forms in which intelligence signals can exist.
What is the name given to one-way communication? Give three examples.
What is the name given to simultaneous two-way communication? Give three examples.
What is the term used to describe two-way communication in which each party takes turns transmitting? Give three examples.
What type of electronic signals are continuously varying voice and video signals?
What are on/off intelligence signals called?
How are voice and video signals transmitted digitally?
What terms are often used to refer to original voice, video, or data signals?
What technique must sometimes be used to make an information signal compatible with the medium over which it is being transmitted?
What is the process of recovering an original signal called?
What is a broadband signal?
Name the process used to transmit two or more baseband signals simultaneously over a common medium.
Name the technique used to extract multiple intelligence signals that have been transmitted simultaneously over a single communication channel.
What is the name given to signals that travel through free space for long distances?
What does a radio wave consist of?
Calculate the wavelength of signals with frequencies of 1.5 kHz, 18 MHz, and 22 GHz in miles, feet, and centimeters, respectively.
Why are audio signals not transmitted directly by electromagnetic waves?
What is the human hearing frequency range?
What is the approximate frequency range of the human voice?
Do radio transmissions occur in the VLF and LF ranges?
What is the frequency range of AM radio broadcast stations?
What is the name given to radio signals in the high-frequency range?
In what segment of the spectrum do TV channels 2 to 13, and FM broadcasting, appear?
List five major uses of the UHF band. 36. What are frequencies above 1 GHz called?
What are the frequencies just above the EHF range called?
What is a micrometer, and what is it used to measure?
Name the three segments of the optical frequency spectrum.
What is a common source of infrared signals?
What is the approximate spectrum range of infrared signals?
Define the term angstrom and explain how it is used.
What is the wavelength range of visible light?
Which two channels or media do light signals use for electronic communication?
Name two methods of transmitting visual data over a telephone network.
What is the name given to the signaling of individuals at remote locations by radio?
What term is used to describe the process of making measurements at a distance?
List four ways radio is used in the telephone system.
What principle is used in radar?
What is underwater radar called? Give two examples.
What is the name of a popular radio communication hobby?
What device enables computers to exchange digital data over the telephone network?
What do you call the systems of interconnections of PCs and other computers in offices or buildings?
What is a generic synonym for radio?
Name the three main types of technical positions available in the communication field.
What is the main job of an engineer?
What is the primary degree for an engineer?
What is the primary degree for a technician?
Name a type of technical degree in engineering other than engineer or technician.
Can the holder of an associate of technology degree transfer the credits to an engineering degree program?
What types of work does a technician ordinarily do?
List three other types of jobs in the field of electronic communication that do not involve engineering or technician’s work.
What are the four main segments of the communication industry? Explain briefly the function of each.
Why are standards important?
What types of characteristics do communication standards define?
Problems Question Of Electronic Communication
Calculate the frequency of signals with wavelengths of 40 m, 5 m, and 8 cm.
In what frequency range does the common ac power line frequency fall?
What is the primary use of the SHF and EHF ranges?
Critical Thinking Question Of Electronic Communication
Name three ways that a higher-frequency signal called the carrier can be varied to transmit the intelligence.
Name two common household remote- control units, and state the type of media and frequency ranges used for each.
How is radio astronomy used to locate and map stars and other heavenly bodies?
In what segment of the communication field are you interested in working, and why?
Assume that all the electromagnetic spectrum from ELF through microwaves was fully occupied. Explain some ways that communication capability could be added.
What is the speed of light in feet per microsecond? In inches per nanosecond? In meters per second?
Make a general statement comparing the speed of light with the speed of sound. Give an example of how the principles mentioned might be demonstrated.
List five real-life communication applications, not specifically mentioned in this article.
“Invent” five new communication methods, wired or wireless, that you think would be practical.
Assume that you have a wireless application you would like to design, build, and sell as a commercial product. You have selected a target frequency in the UHF range. How would you decide what frequency to use, and how would you get permission to use it?
Make an exhaustive list of all the electronic communication products that you own, have access to at home or in the office, and/or use on a regular basis.
You have probably seen or heard of a simple communication system made of two paper cups and a long piece of string. How could such a simple system work?