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CWNA Radio Frequency Components Measurements And Mathematics
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CWNA Radio Frequency Components Measurements And Mathematics
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19 Questions

1. Units of measure that provide comparative measurement values - not absolute measurements. Decibel is an example

2. The final component in a wireless medium. It takes the carrier signal that is received from the antenna and translates the modulated signals into 1s and 0s. it then takes this data and passes it to the computer to be processed

3. A device that intentionally generates and emits radio frequency energy by radiation or induction

4. The highest RF signal strength that is transmitted from a particular antenna

5. Doubling the distance between a transmitter and receiver will decrease the received signal by 6 dB. Halving the distance between a transmitter and receiver will increase the received signal by 6 dB

6. A unit of power equal to 1/1000 of a watt

7. It is a measurement of the ratio between two powers. Equals 10 * log10(P1/P2)

8. Provides approximate values when performing RF math calculations. 4 rules

9. A basic unit of power. Equal to 1 ampere (amp) of current flowing at 1 volt

10. A point source that radiates signal equally in all directions. e.g. sun

11. Units of measure that provide absolute measurement values - not relative or comparative measurements. Watt is an example

12. A level of desired signal above What is required

13. The calculation of the amount of RF signal that is received minus the amount of signal required by the receiver

14. A point that radiates signal equally in all directions. e.g. sun

15. Used by a wireless device to determine if another device is transmitting - also known as a clear channel assessment. An optional 802.11 parameter with a value of 0 to 255. It is designed by the hardware manufacturer as a relative measurement of the R

16. The calculation of the amount of RF signal that is received minus the amount of signal required by the receiver

17. The amount of signal a wireless station must receive in order to distinguish between data and noise

18. The initial component in a wireless medium. The computer hands the data off and this begins the RF communication

19. Provides two functions in a communication system. When connected to the transmitter - it collects the AC signal that it receives from the trasmitter and directs - or radiates - the RF waves away from the antenna in a pattern specific to the antenna t

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