Review Quiz: Introduction to Electronics Communications

In a communications system, noise is most likely to affect the signal

• at the transmitter

• in the channel

• in the information source

• at the destination

Indicate the FALSE statement. Fourier analysis shows that a sawtooth wave consist of

• fundamental and subharmonic sine waves

• a fundamental sine wave and an infinite number of harmonics

• fundamental and harmonic sine waves whose amplitude decreases with the harmonic number

• sinusoidal voltages, some of which are small enough to ignore in practice

Indicate the true statement. The process of sending and receiving started as early as

• the middle 1930s

• 1850

• the beginning of the twentieth century

• the 1840s

Communication is the process of

• Keeping in touch.

• Broadcasting.

• Exchanging information.

• Entertainment by electronics.

Two (2) key barriers to human communication are (check that applies)

• Language

• Distance

• Cost

• Standards

Electronic communications was discovered in which century?

• 16th

• 18th

• 19th

• 20th

Random interference to transmitted signals is called

• Adjacent channel overlap.

• Cross talk.

• Garbage-in-garbage out.

• Noise.

The communication medium causes the signal to be

• Amplified.

• Modulated.

• Attenuated.

• Interfered with.

One-way communication is called

• Half duplex

• Full duplex

• Bicomm

• Simplex

Simultaneous two-way communication is called

• Half duplex

• Full duplex

• Bicomm

• Simplex