单选题What approximates the signal attenuation of a plasterboard wall？（）A Crowd of peopleB Office windowC Metal doorD Brick wall

题目
单选题
What approximates the signal attenuation of a plasterboard wall？（）
A

Crowd of people

B

Office window

C

Metal door

D

Brick wall

相似考题

1.小区专用的参考信号与『____』关联。(What the cell-specific reference signal associate with『____』? )

2.What are three factors that limit the maximum distance of an amplified optical signal without regeneration? ()(Choose three.)A. fiber dispersionB. signal attenuationC. transmitter powerD. amplifier bandwidthE. receiver dispersion tolerance

3.Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * of Splices) + (Connector Attenuation * of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）A. fiber lossB. OSNR levelC. post amplificationD. index of reflectionE. index of refractionF. power post amplification budget

4.LTE中『____』基于主同步信号和辅同步信号进行的。(What carries on basing on the main synchronized signal and the auxiliary synchronized signal in LTE system『____』.)

参考答案和解析
正确答案： B
解析： 暂无解析
更多“What approximates the signal attenuation of a plasterboard w”相关问题

  • 第1题：

    What is the phenomenon called where different wavelengths of light travel at different speeds?()

    A.OSNR

    B.dispersion

    C.light skew

    D.attenuation


    参考答案：B

  • 第2题：

    What is the phenomenon called where different wavelengths of light travel at different speeds？（）

    • A、 OSNR
    • B、 dispersion
    • C、 light skew
    • D、 attenuation

    正确答案:B

  • 第3题：

    What are two objectives of a pre-site survey walkthrough？ （）

    • A、Identify potential problem areas
    • B、Define intended coverage areas
    • C、Access compliance with local building codes
    • D、Determine the final location of APs and antennas
    • E、Identify sources of RF signal attenuation and RF interference

    正确答案:A,B

  • 第4题：

    What is the correct relative switching priority in a BLSR ring (higher to lower)?（）

    • A、signal fail, signal degrade, manual switch
    • B、signal degrade, signal fail, manual switch
    • C、protection lockout, manual switch, path AIS
    • D、forced switch, manual switch, signal degrade
    • E、protection lockout, manual switch, forced switch

    正确答案:A

  • 第5题：

    Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations，  what will the given formula provide？（）

    • A、 fiber loss
    • B、 OSNR level
    • C、 post amplification
    • D、 index of reflection
    • E、 index of refraction
    • F、 power post amplification budget

    正确答案:A

  • 第6题：

    What is one thing you should be aware of when conducting a wireless site survey？（）

    • A、 5 GHz equipment will not be able to penetrate through walls as well as 2.4 GHZ equipment.
    • B、 2.4 GHz equipment will not be able to penetrate through walls as well as 5 GHz equipment.
    • C、 Mounting antennas near metal objects will slightly amplify the signal.
    • D、 When determining coverage， you should begin measuring attenuation from the middle of the room.

    正确答案:A

  • 第7题：

    单选题
    What is the correct relative switching priority in a BLSR ring (higher to lower)?（）
    A

    signal fail, signal degrade, manual switch

    B

    signal degrade, signal fail, manual switch

    C

    protection lockout, manual switch, path AIS

    D

    forced switch, manual switch, signal degrade

    E

    protection lockout, manual switch, forced switch


    正确答案： E
    解析： 暂无解析

  • 第8题：

    单选题
    In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ），  what does SNR IN represent？（）
    A

     the signal to noise of the current optical amplifier

    B

     the signal to noise of the previous amplifier or source

    C

     the signal to noise introduced by the optical multiplexer

    D

     the accumulated noise to signal ratio of the optical channel


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * # of Splices) + (Connector Attenuation * # of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）
    A

    fiber loss

    B

    OSNR level

    C

    post amplification

    D

    index of reflection

    E

    index of refraction

    F

    power post amplification budget


    正确答案： E
    解析： 暂无解析

  • 第10题：

    单选题
    What is one thing you should be aware of when conducting a wireless site survey？（）
    A

     5 GHz equipment will not be able to penetrate through walls as well as 2.4 GHZ equipment.

    B

     2.4 GHz equipment will not be able to penetrate through walls as well as 5 GHz equipment.

    C

     Mounting antennas near metal objects will slightly amplify the signal.

    D

     When determining coverage， you should begin measuring attenuation from the middle of the room.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？ （）
    A

     signal fail， signal degrade， manual switch

    B

     signal degrade， signal fail， manual switch

    C

     protection lockout， manual switch， path AIS

    D

     forced switch， manual switch， signal degrade

    E

     protection lockout， manual switch， forced switch


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）
    A

    the signal to noise of the current optical amplifier

    B

    the signal to noise of the previous amplifier or source

    C

    the signal to noise introduced by the optical multiplexer

    D

    the accumulated noise to signal ratio of the optical channel


    正确答案： A
    解析： 暂无解析

  • 第13题：

    What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)

    • A、fiber dispersion
    • B、signal attenuation
    • C、transmitter power
    • D、amplifier bandwidth
    • E、receiver dispersion tolerance

    正确答案:A,B,E

  • 第14题：

    What are three factors that limit the maximum distance of an amplified optical signal without regeneration？ （）

    • A、 fiber dispersion
    • B、 signal attenuation
    • C、 transmitter power
    • D、 amplifier bandwidth
    • E、 receiver dispersion tolerance

    正确答案:A,B,E

  • 第15题：

    In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）

    • A、the signal to noise of the current optical amplifier
    • B、the signal to noise of the previous amplifier or source
    • C、the signal to noise introduced by the optical multiplexer
    • D、the accumulated noise to signal ratio of the optical channel

    正确答案:B

  • 第16题：

    What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？ （）

    • A、 signal fail， signal degrade， manual switch
    • B、 signal degrade， signal fail， manual switch
    • C、 protection lockout， manual switch， path AIS
    • D、 forced switch， manual switch， signal degrade
    • E、 protection lockout， manual switch， forced switch

    正确答案:A

  • 第17题：

    By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）

    • A、1/6
    • B、1/4
    • C、1/3
    • D、1/2

    正确答案:D

  • 第18题：

    What command with all options and/or parameter will send the signal USR1 to any executing process of  program apache2？（）


    正确答案:KILLALL-SUSR1APACHE2

  • 第19题：

    单选题
    What approximates the signal attenuation of a plasterboard wall？（）
    A

    Crowd of people

    B

    Office window

    C

    Metal door

    D

    Brick wall


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    What is the phenomenon called where different wavelengths of light travel at different speeds？（）
    A

     OSNR

    B

     dispersion

    C

     light skew

    D

     attenuation


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    What does a broad-spectrum interferer lower？（）
    A

    SNR

    B

    noise floor

    C

    level of interference

    D

    Received Signal Strength Indicator


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）
    A

    1/6

    B

    1/4

    C

    1/3

    D

    1/2


    正确答案： A
    解析： 暂无解析

  • 第23题：

    多选题
    What are two objectives of a pre-site survey walkthrough？ （）
    A

    Identify potential problem areas

    B

    Define intended coverage areas

    C

    Access compliance with local building codes

    D

    Determine the final location of APs and antennas

    E

    Identify sources of RF signal attenuation and RF interference


    正确答案： B,A
    解析： 暂无解析

  • 第24题：

    单选题
    Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations，  what will the given formula provide？（）
    A

     fiber loss

    B

     OSNR level

    C

     post amplification

    D

     index of reflection

    E

     index of refraction

    F

     power post amplification budget


    正确答案： F
    解析： 暂无解析

相关内容