Question 1

Explain multipath distortion and how it can be minimized.

Accepted Answer

Answers may vary. Waves are reflected and arrive at the receiver at different times due to the fact that reflected waves have traveled farther before reaching the receiver. These waves can frequently arrive at the receiver antenna out of phase with the signal that reaches the antenna via a shorter, more direct path. Increasing signal strength and using directional antennas are two ways of minimizing multipath distortion.

Question 2

When signals are sent at frequencies that are closely grouped together, an errant signal may encroach on a close frequency, causing _______.

Accepted Answer

A)  frequency conflict 
B)  crosstalk 
C)  time conflict 
D)  channel mixing 
A)  frequency conflict 
B)  crosstalk 
C)  time conflict 
D)  channel mixing B

Question 3

A passband has both a minimum and maximum threshold.

Accepted Answer

A) True 
 B)False  True

Question 4

What does the Federal Communications Commission do regarding the licensing of radion frequencies?

Accepted Answer

Answers may vary. The FCC regulates and

Question 5

Without switching, 1,225 cables would be required to interconnect 50 telephones.

Accepted Answer

A) True 
 B)False

Question 6

What is switching? What type of switching is used with telephone transmissions, and what type is used for data transmissions?

Accepted Answer

Answers may vary, but students should un

Question 7

The resulting output from the modulation process is known as the middle frequency (MF) signal.

Accepted Answer

A) True 
 B)False

Question 8

A(n) ______ combines two inputs to create a single output.

Accepted Answer

A)  mixer 
B)  codex 
C)  filter 
D)  amplifier 
A)  mixer 
B)  codex 
C)  filter 
D)  amplifier

Question 9

________ divides the bandwidth of the frequency into several narrower frequencies. Each user then transmits using its own narrower frequency channel.

Accepted Answer

A)  TDMA 
B)  OFDM 
C)  FDMA 
D)  CDMA 
A)  TDMA 
B)  OFDM 
C)  FDMA 
D)  CDMA

Question 10

When mixing two signals, the highest sum and the smallest difference between the carrier frequency and the range of frequencies at the other input define two limits known as the sidebands of the frequency carrier.

Accepted Answer

A) True 
 B)False

Question 11

When using the same antenna for full-duplex communications, the same frequency can be used for transmitting and receiving simultaneously.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following divides the bandwidth of the frequency channel into several time slots?

Accepted Answer

A)  FDMA 
B)  OFDM 
C)  CDMA 
D)  TDMA 
A)  FDMA 
B)  OFDM 
C)  CDMA 
D)  TDMA

Question 13

A(n) ______ actively increases a signal's intensity or strength.

Accepted Answer

A)  transmitter 
B)  demodulator 
C)  amplifier 
D)  antenna 
A)  transmitter 
B)  demodulator 
C)  amplifier 
D)  antenna

Question 14

TDMA can carry three times the amount of data that CDMA can.

Accepted Answer

A) True 
 B)False

Question 15

Each of the following is a type of RF filter except _____.

Accepted Answer

A)  low-pass 
B)  high-pass 
C)  passband 
D)  bandpass 
A)  low-pass 
B)  high-pass 
C)  passband 
D)  bandpass

Question 16

______ is a method of transmission in which the information is broken up into smaller units.

Accepted Answer

A)  Error correction 
B)  Circuit switching 
C)  Electromagnetic interference 
D)  Packet switching 
A)  Error correction 
B)  Circuit switching 
C)  Electromagnetic interference 
D)  Packet switching

Question 17

A _______ transmission uses spread spectrum technology and unique spreading codes for each user.

Accepted Answer

A)  CDMA 
B)  FDMA 
C)  TDMA 
D)  OFDM 
A)  CDMA 
B)  FDMA 
C)  TDMA 
D)  OFDM

Question 18

The result of using a PN code is that ________.

Accepted Answer

A)  it adds a unique address to the signal 
B)  it spreads the signal over a wider range of frequencies 
C)  it mixes the signal with the IF 
D)  it decodes the signal 
A)  it adds a unique address to the signal 
B)  it spreads the signal over a wider range of frequencies 
C)  it mixes the signal with the IF 
D)  it decodes the signal

Question 19

List and discuss the advantages of standards.

Accepted Answer

Answers may vary but should include some

Question 20

List and describe the three types of data flow.

Accepted Answer

Simplex is one-way transmissio

Explain multipath distortion and how it can be minimized.

When signals are sent at frequencies that are closely grouped together, an errant signal may encroach on a close frequency, causing _______.

A passband has both a minimum and maximum threshold.

What does the Federal Communications Commission do regarding the licensing of radion frequencies?

Without switching, 1,225 cables would be required to interconnect 50 telephones.

What is switching? What type of switching is used with telephone transmissions, and what type is used for data transmissions?

The resulting output from the modulation process is known as the middle frequency (MF) signal.

A(n) ______ combines two inputs to create a single output.

________ divides the bandwidth of the frequency into several narrower frequencies. Each user then transmits using its own narrower frequency channel.

When mixing two signals, the highest sum and the smallest difference between the carrier frequency and the range of frequencies at the other input define two limits known as the sidebands of the frequency carrier.

When using the same antenna for full-duplex communications, the same frequency can be used for transmitting and receiving simultaneously.

Which of the following divides the bandwidth of the frequency channel into several time slots?

A(n) ______ actively increases a signal's intensity or strength.

TDMA can carry three times the amount of data that CDMA can.

Each of the following is a type of RF filter except _____.

______ is a method of transmission in which the information is broken up into smaller units.

A _______ transmission uses spread spectrum technology and unique spreading codes for each user.

The result of using a PN code is that ________.

List and discuss the advantages of standards.

List and describe the three types of data flow.

Introduction to Wireless Communications

Wireless Data Transmission

How Antennas Work

Low Rate Wireless Personal Area Networks

High-Rate Wireless Personal Area Networks

Wi-Fi Wireless Local Area Networks

Wi-Fi Wlan Security

WMAN - Wireless Metropolitan Area Networks

WWAN - Wireless Wide Area Networks

RFID - Radio Frequency Identification

Wireless Communication in Business

Filters

Exam 3: Understanding Radio Frequency Communications

Explain multipath distortion and how it can be minimized.

When signals are sent at frequencies that are closely grouped together, an errant signal may encroach on a close frequency, causing _______.

A passband has both a minimum and maximum threshold.

What does the Federal Communications Commission do regarding the licensing of radion frequencies?

Without switching, 1,225 cables would be required to interconnect 50 telephones.

What is switching? What type of switching is used with telephone transmissions, and what type is used for data transmissions?

The resulting output from the modulation process is known as the middle frequency (MF) signal.

A(n) ______ combines two inputs to create a single output.

________ divides the bandwidth of the frequency into several narrower frequencies. Each user then transmits using its own narrower frequency channel.

When mixing two signals, the highest sum and the smallest difference between the carrier frequency and the range of frequencies at the other input define two limits known as the sidebands of the frequency carrier.

When using the same antenna for full-duplex communications, the same frequency can be used for transmitting and receiving simultaneously.

Which of the following divides the bandwidth of the frequency channel into several time slots?

A(n) ______ actively increases a signal's intensity or strength.

TDMA can carry three times the amount of data that CDMA can.

Each of the following is a type of RF filter except _____.

______ is a method of transmission in which the information is broken up into smaller units.

A _______ transmission uses spread spectrum technology and unique spreading codes for each user.

The result of using a PN code is that ________.

List and discuss the advantages of standards.

List and describe the three types of data flow.

Introduction to Wireless Communications

Wireless Data Transmission

How Antennas Work

Low Rate Wireless Personal Area Networks

High-Rate Wireless Personal Area Networks

Wi-Fi Wireless Local Area Networks

Wi-Fi Wlan Security

WMAN - Wireless Metropolitan Area Networks

WWAN - Wireless Wide Area Networks

RFID - Radio Frequency Identification

Wireless Communication in Business

Filters