fengqidan 发表于 2020-11-3 06:26:01

10.12题库中的错误答案

本帖最后由 fengqidan 于 2020-11-3 06:29 编辑

看了一下题库，题目22和152的答案貌似有误。
22题，题库给出的答案是BC， 正确应为BE.Which two pieces of information are necessary to compute SNR? (Choose two.)
A. transmit power
B. noise floor
C. EIRP
D. antenna gain
E. RSSI


152题题库给为B，正确应为A
152. What is calculated using the numerical values of the transmitter power level, cable loss, and antenna gain?
A. EIRP
B. dBi
C. RSSI
D. SNR



如有不同意见，欢迎讨论

xworkman 发表于 2020-11-3 09:06:07

感謝分享

xworkman 发表于 2020-11-3 09:22:09

感謝分享

Gkenny 发表于 2020-11-3 10:10:05


感謝分享

robblam 发表于 2020-11-3 16:56:12

152 应该是dBI

robblam 发表于 2020-11-3 16:57:02

别人说了的，发射功率用什么表示

fengqidan 发表于 2020-11-4 05:15:30

152题解释

原题翻译为：什么是由发射功率，馈线损耗和天线增益三项的数字值计算得来的
EIRP (Effective Isotropic Radiated Power) is the actual amount of signal leaving the antenna and is a value measured in db and is based on 3 values:
a) Transmit Power (dBm)
b) Cable Loss (dB)
c) Antenna Gain (dBi)

To determine EIRP follow this equation:
<Transmit Power> - Cable Loss + Antenna Gain = EIRP

参见
https://community.cisco.com/t5/wireless-mobility-documents/snr-rssi-eirp-and-free-space-path-loss/ta-p/3128478

thamky 发表于 2020-11-4 19:19:15

{:6_264:}{:6_264:}{:6_264:}

about2580 发表于 2020-11-4 23:09:49

路漫漫其修远兮，吾将上下而求索

郭家祥 发表于 2020-11-5 20:52:08

恭喜{:6_273:}

anjoyang 发表于 2020-11-9 14:42:23

Thanks for sharing

aaa24231016 发表于 2020-11-10 10:01:06

Thanks for sharing

tonyqin 发表于 2020-11-10 11:07:03

考完还能分享，楼主不错！

ilforno 发表于 2020-11-10 16:04:51

考完试能分享经验，好样的。

happy7533967 发表于 2020-11-13 17:41:08

Congrats! Thanks for sharing
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