10.12题库中的错误答案

fengqidan

看了一下题库，题目22和152的答案貌似有误。
$ ^: L$ K' B: {8 v: C9 b22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
& q* m+ Y4 \3 c% @- S' P! o" ^# eD. antenna gain
E. RSSI
( I' [$ O3 I5 Z  Z" a

- `# |0 B5 z  p: c6 ~152题题库给为B，正确应为A
& f; F0 J4 [8 B+ N. _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

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

; f" Q2 `+ j" S. S4 v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:
9 U( j/ y! @7 S8 t: g+ E& ja) Transmit Power (dBm)
8 J9 _# }3 w( _# O6 @4 X6 eb) Cable Loss (dB)
1 R  J: i; v2 w  Y8 jc) Antenna Gain (dBi)

9 d7 \, g$ H8 h9 w4 O- STo determine EIRP follow this equation:
<Transmit Power> - Cable Loss + Antenna Gain = EIRP
* [4 N" r5 E2 t% J3 m
参见
- |1 T2 n& r9 ~7 d6 Dhttps://community.cisco.com/t5/w ... h-loss/ta-p/3128478
4 W& t; B# _* c6 _/ R* q$ P

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