10.12题库中的错误答案

fengqidan

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# D0 U: H1 x; N1 f, ^( ^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
2 c. m- j6 y4 _5 gB. noise floor
C. EIRP
# l* i- t5 S6 U6 A! dD. antenna gain
E. RSSI
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152题题库给为B，正确应为A
5 }! U! _8 ^9 j5 P7 ~! Q152. What is calculated using the numerical values of the transmitter power level, cable loss, and antenna gain?
A. EIRP
B. dBi
C. RSSI
" t0 \) l  v8 V2 s# B" K' SD. SNR



% a( j* ?, m# Q7 Z如有不同意见，欢迎讨论

xworkman

感謝分享

xworkman

感謝分享

Gkenny

感謝分享

robblam

152 应该是dBI

robblam

别人说了的，发射功率用什么表示

fengqidan

152题解释
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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
) y( f2 X! G7 d2 y# ~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:
, ?" o( L. x( M/ b& C9 ], ka) Transmit Power (dBm)
b) Cable Loss (dB)
5 K) l" y1 U, l2 ?% z' S& C7 K8 lc) Antenna Gain (dBi)
; F3 s; J8 V6 S* z8 r9 j2 e; I
9 X  u9 f) h7 D. c, STo determine EIRP follow this equation:
1 o5 x, x; N2 y& S, o<Transmit Power> - Cable Loss + Antenna Gain = EIRP

参见
https://community.cisco.com/t5/w ... h-loss/ta-p/3128478

thamky

about2580

路漫漫其修远兮，吾将上下而求索

郭家祥

恭喜

anjoyang

Thanks for sharing

aaa24231016

Thanks for sharing

tonyqin

考完还能分享，楼主不错！

ilforno

考完试能分享经验，好样的。

happy7533967

Congrats! Thanks for sharing