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Which measurement indicates how narrow or wide a transmission is?


A) Fresnel zone
B) Azimuth
C) beamwidth
D) elevation chart

E) A) and C)
F) A) and B)

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List the four singaling processing techniques employe by MIMO to achieve high throughput.

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spatial diversity, s...

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What is an Azimuth chart used to represent?


A) the elevation coverage
B) the horizontal coverage area
C) the vertical coverage area
D) the total IR power

E) A) and C)
F) None of the above

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MATCHING

Premises
information that is computed by the receiver and sent back to the transmitter for use in the antenna configuration
a stick of metal inserted in the earth to ground the antenna
a technique that sends a normal version of the signal along with a shifted version of the same signal
mutiple antennas that can be customized to send an optimal signal
an antenna that divides the coverage area into different parts and gives each part its own antenna
additional power is sent to the antenna from the power source
the VSWR as measured in dB
the ability of an access point to transmit on the antenna that most recently received the strongest incoming signal
the orientation of of radio waves as they leave an antenna
an antenna consisting of a single stretched wire with connection in the middle
Responses
sectorized antenna
ground rod
return loss
antenna array
cyclic shift diversity
implicit feedback
transmit diversity
polarization
dipole antenna
active gain

Correct Answer

information that is computed by the receiver and sent back to the transmitter for use in the antenna configuration
a stick of metal inserted in the earth to ground the antenna
a technique that sends a normal version of the signal along with a shifted version of the same signal
mutiple antennas that can be customized to send an optimal signal
an antenna that divides the coverage area into different parts and gives each part its own antenna
additional power is sent to the antenna from the power source
the VSWR as measured in dB
the ability of an access point to transmit on the antenna that most recently received the strongest incoming signal
the orientation of of radio waves as they leave an antenna
an antenna consisting of a single stretched wire with connection in the middle

Contrast an omnidirectional antenna with a semidirectional antenna.

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Unlike an omnidirectional antenna, which...

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Which technique uses a process in which the sending device codes or assigns weights to the signals before sending them which results in improved reliability?


A) spatial diversity
B) maixmal ratio combining
C) transmit beam forming
D) spatial multiplexing

E) A) and B)
F) B) and C)

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Define the Fresnel zone.

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The Fresnel zone is an elliptical area i...

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Which of the following are measurements used with antennas? (Choose all that apply.)


A) intentional radiator
B) decibels isotropic
C) decibels/mW
D) decibles per second

E) A) and B)
F) B) and C)

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What is the term given to the difference between the received signal level and the signal level required by the radio to assure there are no errors?


A) free space path loss
B) system operating margin
C) voltage standing wave ration
D) link budget

E) A) and B)
F) None of the above

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What term is used to describe an electrical entity that hinders the flow of current and is often a result of a mismatch between two devices?


A) fade margin
B) sensitivity
C) negative gain
D) impedance

E) None of the above
F) A) and B)

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The strength of a signal from an omnidirectional antenna flows out 90 degrees from the antenna's orientation.

A) True
B) False

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What does an Azimuth chart represent?

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The Azimuth chart represents t...

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What is the most common type of antenna for a WLAN?

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The most common type of antenn...

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____ antennas are used for long distance,point-to-point wireless links,such as connecting buildings that are up to 42 kilometers (25 miles) apart.


A) Fresnel
B) Omni-directional
C) Semi-directional
D) Highly-directional

E) C) and D)
F) All of the above

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Which of the following are steps for mitigating obstructions in the Fresnel zone? (Choose all that apply.)


A) lower the tower height
B) reduce obstructions such as trees
C) raise the antenna mounting point
D) use a MIMO antenna

E) All of the above
F) A) and C)

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What does an antenna's beamwidth indicate?

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An antenna's beamwid...

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An RF signal ____________ has one input and two or more outputs,which divides the power of the input signal to multiple outputs.

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Which technique can increase performance by sending independent streams of information at the same time over the same frequencies?


A) spatial diversity
B) MIMO diversity
C) transmit beam forming
D) spatial multiplexing

E) A) and B)
F) A) and C)

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In what units is passive gain measured?


A) effective isotropically radiated power
B) intentionally radiated power
C) decibels dipole
D) decibels isotropic

E) None of the above
F) A) and B)

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Which of the following is true about antennas?


A) they are active and generate the power they use to transmit
B) they are passive conductors
C) they have a single connection point which is to the ground plane
D) IR is the power emanating from an antenna

E) C) and D)
F) B) and D)

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Showing 21 - 40 of 41

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