Introduction to Communication Systems Quiz

The theory of radio waves was originated by:

• Marconi

• Bell

• Maxwell

• Hertz

The person who sent the first radio signal across the Atlantic ocean was:

• Marconi

• Bell

• Maxwell

• Hertz

The transmission of radio waves was first done by:

• Marconi

• Bell

• Maxwell

• Hertz

A complete communication system must include:

• a transmitter and receiver

• a transmitter, a receiver, and a channel

• a transmitter, a receiver, and a spectrum analyzer

• a multiplexer, a demultiplexer, and a channel

Radians per second is equal to:

• 2π × f

• f ÷ 2π

• the phase angle

• none of the above

The bandwidth required for a modulated carrier depends on:

• the carrier frequency

• the signal-to-noise ratio

• the signal-plus-noise to noise ratio

• the baseband frequency range

When two or more signals share a common channel, it is called:

• sub-channeling

• signal switching

• SINAD

• multiplexing

TDM stands for:

• Time-Division Multiplexing

• Two-level Digital Modulation

• Time Domain Measurement

• none of the above

FDM stands for:

• Fast Digital Modulation

• Frequency Domain Measurement

• Frequency-Division Multiplexing

• none of the above

The wavelength of a radio signal is:

• equal to f ÷ c

• equal to c ÷ λ

• the distance a wave travels in one period

• how far the signal can travel without distortion