Question 1

A typical C-band satellite will include twenty-four transponders, all on separate channel frequencies.

Accepted Answer

This is true. A typical C-band satellite has 24 transponders, each operating on a separate channel frequency.

Question 2

Satellite transmission and reception occurs over what range of frequencies?&#10;A) Kilo Hz&#10;B) Mega Hz&#10;C) Giga Hz&#10;D) Terra Hz

Accepted Answer

Satellite transmission and reception typically occur in the Gigahertz (GHz) range, which is suitable for long-distance communication and can handle large amounts of data.

Question 3

A satellite dish is a microwave antenna.

Accepted Answer

A satellite dish is designed to receive microwave signals from communication satellites in space, and therefore functions as a microwave antenna.

Question 4

What standard applies to higher speed LANs, supporting data rates up to 54 Mbps, at 5 GHz.&#10;A) 802.11a&#10;B) 802.11b&#10;C) 802.11g&#10;D) Bluetooth

Accepted Answer

802.11a is the standard that uses the 5 GHz frequency band and can support data rates up to 54 Mbps, making it the best choice for higher speed LANs. Bluetooth, on the other hand, is a completely different wireless technology that operates at a lower data rate and frequency range. 802.11b and 802.11g operate at 2.4 GHz and have lower data rates, making them less ideal for higher speed LANs.

Question 5

Wireless transmissions are more secure than hard-wired transmissions.

Accepted Answer

This statement is false. Wireless transmissions can be intercepted and hacked more easily compared to hard-wired transmissions.

Question 6

A transponder is an example of a _________.&#10;A) Switch&#10;B) Gateway&#10;C) Repeater&#10;D) Server

Accepted Answer

A transponder receives a radio signal and retransmits it at a different frequency or power level, essentially acting as a repeater. It is not a switch, gateway, or server.

Question 7

What type of antenna is typically used for television reception and the UHF frequency bands?&#10;A) Broadband&#10;B) Yagi&#10;C) Dipole&#10;D) Parabolic Dish

Accepted Answer

A Yagi antenna is typically used for television reception in the UHF frequency bands because it offers high gain and directional reception, making it ideal for picking up distant signals. Broadband antennas are designed to receive a wider range of frequencies and may not provide enough gain for UHF signals. Dipole antennas are not as directional as Yagi antennas and may not be ideal for picking up weak signals. Parabolic dish antennas are more commonly used for satellite reception, and are not necessarily the best choice for terrestrial television reception.

Question 8

Antenna alignment is critical to the quality of reception.

Accepted Answer

Antenna alignment ensures that the antenna is pointed towards the source of the signal, leading to a stronger and clearer reception. Improper alignment can result in weak or distorted reception.

Question 9

The purpose of a phase array antenna system ________.&#10;A) To broadcast and omni-directional signal&#10;B) To act as a filter&#10;C) To transmit simultaneously on multiple frequencies&#10;D) To increase the radiation pattern and overall gain of transmission

Accepted Answer

The purpose of a phase array antenna system is to increase the radiation pattern and overall gain of transmission by using multiple antennas that work together to steer the signal beam in a specific direction. This allows for improved signal strength and coverage in a particular area or direction, making it useful in applications such as radar, satellite communication, and wireless networks. Therefore, option D is the best choice. Options A, B, and C do not accurately describe the purpose of a phase array antenna system.

Question 10

There are an unlimited number of communication channels.

Accepted Answer

The number of communication channels in a network increases with the number of participants, but it is not unlimited. It can be calculated using the formula n(n-1)/2, where n is the number of participants.

Question 11

AM antennas are physically smaller than that of FM antennas.

Accepted Answer

The answer of AM antennas are physically smaller than that...

Question 12

According to the National Electrical Code, lead-in conductors for transmitting stations must be mounted at least ________ clear of the surface of the building.&#10;A) 3 inches&#10;B) 12 inches&#10;C) 3 ft.&#10;D) 6 ft.

Accepted Answer

The answer of According to the National Electrical Code, lead-in...

Question 13

A basic antenna element is tuned to ________the wavelength of a carrier frequency.&#10;A) 1/8&#10;B) 1/4&#10;C) 1/2&#10;D) 3/4

Accepted Answer

The answer of A basic antenna element is tuned to...

Question 14

The job of a transmitter is to send a signal source over a communication channel.

Accepted Answer

The answer of The job of a transmitter is to...

Question 15

For a radio station to transmit an intended signal, their operating frequency must be tuned to a specific carrier frequency.

Accepted Answer

The answer of For a radio station to transmit an...

Question 16

The antenna element of a receiving dish antenna is a waveguide called a/an __________.&#10;A) LNB&#10;B) Repeater&#10;C) Transponder&#10;D) Gateway

Accepted Answer

The answer of The antenna element of a receiving dish...

Question 17

Digital signals have only two possible output variations.

Accepted Answer

The answer of Digital signals have only two possible output...

Question 18

A half-duplex system can only transmit a signal .

Accepted Answer

The answer of A half-duplex system can only transmit a...

Question 19

What is roaming?&#10;A) Communicating without actually making a dialed call&#10;B) Jumping from cell tower to cell tower&#10;C) The act of traveling and communicating between adjacent cells&#10;D) Transmitting and receiving from multiple towers at one time

Accepted Answer

The answer of What is roaming?&#10;A) Communicating without actually making...

Question 20

What standard provides a short-range communication link between peripheral devices and a computer, typically 10 cm to 10 m apart.&#10;A) 802.11a&#10;B) 802.11b&#10;C) 802.11g&#10;D) Bluetooth

Accepted Answer

The answer of What standard provides a short-range communication link...

Question 21

Match between columns&#10;                        Premises: ________ Allows customers to be reassigned frequencies Due to problems of interference and availability&#10;________ Allows customers to be reassigned frequencies Due to problems of interference and availability&#10;________ Allows customers to be reassigned frequencies Due to problems of interference and availability&#10;________ Allows customers to be reassigned frequencies Due to problems of interference and availability&#10;________ Allows customers to be reassigned frequencies Due to problems of interference and availability&#10;________ Allows customers to be reassigned frequencies Due to problems of interference and availability

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 22

Match between columns&#10;                        Premises: ________ Used mainly in Europe&#10;________ Used mainly in Europe&#10;________ Used mainly in Europe&#10;________ Used mainly in Europe&#10;________ Used mainly in Europe&#10;________ Used mainly in Europe

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 23

Match between columns&#10;                        Premises: ________ Allows only a single user access to a Transmission frequency&#10;________ Allows only a single user access to a Transmission frequency&#10;________ Allows only a single user access to a Transmission frequency&#10;________ Allows only a single user access to a Transmission frequency&#10;________ Allows only a single user access to a Transmission frequency&#10;________ Allows only a single user access to a Transmission frequency

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 24

A small-range cellular repeater system intended for indoor use, to allow for an extended use of cell phones is called _________.&#10;A) Pico cell&#10;B) Cell tower&#10;C) Transmitting station&#10;D) Wideband

Accepted Answer

The answer of A small-range cellular repeater system intended for...

Question 25

The propagation delays for LEO satellites will be in________.&#10;A) microseconds&#10;B) milliseconds&#10;C) seconds&#10;D) minutes

Accepted Answer

The answer of The propagation delays for LEO satellites will...

Question 26

Match between columns&#10;                        Premises: ________ Can accommodate up to twenty times More users than FDMA&#10;________ Can accommodate up to twenty times More users than FDMA&#10;________ Can accommodate up to twenty times More users than FDMA&#10;________ Can accommodate up to twenty times More users than FDMA&#10;________ Can accommodate up to twenty times More users than FDMA&#10;________ Can accommodate up to twenty times More users than FDMA

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 27

Match between columns&#10;                        Premises: ________ Transmitted signals hop randomly From one frequency to another&#10;________ Transmitted signals hop randomly From one frequency to another&#10;________ Transmitted signals hop randomly From one frequency to another&#10;________ Transmitted signals hop randomly From one frequency to another&#10;________ Transmitted signals hop randomly From one frequency to another&#10;________ Transmitted signals hop randomly From one frequency to another

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 28

Match between columns&#10;                        Premises: ________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream&#10;________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream&#10;________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream&#10;________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream&#10;________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream&#10;________ Digital signals are organized into packets And assigned to allocated time slots Within a complete data stream

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 29

Match between columns&#10;                        Premises: ________ Uses less power, operates more Efficiently with an expanded number Of time slots&#10;________ Uses less power, operates more Efficiently with an expanded number Of time slots&#10;________ Uses less power, operates more Efficiently with an expanded number Of time slots&#10;________ Uses less power, operates more Efficiently with an expanded number Of time slots&#10;________ Uses less power, operates more Efficiently with an expanded number Of time slots&#10;________ Uses less power, operates more Efficiently with an expanded number Of time slots

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Question 30

Match between columns&#10;                        Premises: ________ Codes a digital bit stream by using A pseudorandom noise pattern&#10;________ Codes a digital bit stream by using A pseudorandom noise pattern&#10;________ Codes a digital bit stream by using A pseudorandom noise pattern&#10;________ Codes a digital bit stream by using A pseudorandom noise pattern&#10;________ Codes a digital bit stream by using A pseudorandom noise pattern&#10;________ Codes a digital bit stream by using A pseudorandom noise pattern

Accepted Answer

The Answer of TDMA and GSM and CDMA and FDMA is...

Deck 13: Wireless Communications and National Electrical Code Article 810