10.12题库中的错误答案

fengqidan · 发表于 2020-11-3 06:26:01

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/w ... h-loss/ta-p/3128478

thamky · 发表于 2020-11-4 19:19:15

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

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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