SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
CWNA Radio Frequency Components Measurements And Mathematics
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
cwna
Instructions:
Answer 23 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Units of measure that provide absolute measurement values - not relative or comparative measurements. Watt is an example
unit of power
transmitter
link budget
decibel (dB)
2. 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
decibel (dB)
received signal strength indicator (RSSI)
antenna
isotropic radiator
3. A point that radiates signal equally in all directions. e.g. sun
point source
watt
antenna
dBm
4. The highest RF signal strength that is transmitted from a particular antenna
link budget
equivalent isotropically radiated power (EIRP)
intentional radiator (IR)
received signal strength indicator (RSSI)
5. The increase in gain of an antenna - conmpared to the signal of a dipole antenna. Another way of phrasing this is 'decibel gain relative to a dipole antenna'
decibel (dB)
fade margin
dBd
transmitter
6. This law states that the change in power is equal to 1 divided by the square of the change in distance
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
7. A level of desired signal above What is required
rule of 10s and 3s
fade margin
milliwatt
watt
8. 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
Newton's Inverse Square Law
unit of power
dBi
receiver
9. The calculation of the amount of RF signal that is received minus the amount of signal required by the receiver
fade margin
system operating margin (SOM)
dBi
unit of power
10. Provides approximate values when performing RF math calculations. 4 rules
milliwatt
rule of 10s and 3s
point source
unit of comparison
11. The initial component in a wireless medium. The computer hands the data off and this begins the RF communication
intentional radiator (IR)
transmitter
unit of comparison
point source
12. A point source that radiates signal equally in all directions. e.g. sun
6 dB rule
isotropic radiator
milliwatt
intentional radiator (IR)
13. A unit of power equal to 1/1000 of a watt
intentional radiator (IR)
milliwatt
received signal strength indicator (RSSI)
system operating margin (SOM)
14. Gain or increase of power from an antenna when compared to what an isotropic radiator would generate. Another way of phrasing this is 'decibel gain relative to an isotropic radiator'
received signal strength indicator (RSSI)
dBi
antenna
fade margin
15. 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
link budget
6 dB rule
unit of comparison
dBd
16. The calculation of the amount of RF signal that is received minus the amount of signal required by the receiver
dBm
unit of comparison
link budget
system operating margin (SOM)
17. Units of measure that provide comparative measurement values - not absolute measurements. Decibel is an example
watt
milliwatt
equivalent isotropically radiated power (EIRP)
unit of comparison
18. It is a measurement of the ratio between two powers. Equals 10 * log10(P1/P2)
unit of comparison
decibel (dB)
isotropic radiator
equivalent isotropically radiated power (EIRP)
19. The amount of signal a wireless station must receive in order to distinguish between data and noise
link budget
unit of power
receive sensitivity
Newton's Inverse Square Law
20. A device that intentionally generates and emits radio frequency energy by radiation or induction
point source
watt
dBi
intentional radiator (IR)
21. 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
dBm
received signal strength indicator (RSSI)
milliwatt
unit of power
22. Compares a signal to 1 milliwatt of power. means 'decibels relative to 1 milliwatt.' It is a measurement of power
intentional radiator (IR)
fade margin
dBi
dBm
23. A basic unit of power. Equal to 1 ampere (amp) of current flowing at 1 volt
unit of power
equivalent isotropically radiated power (EIRP)
antenna
watt