Name: 
 

Fiber U Attenuators



True/False
Indicate whether the statement is true or false.
 

 1. 

If the receiver power is too high, the receiver will overload and have high bit-error-rate.
 

 2. 

If the receiver power is too low, the electrical noise in the receiver will cause it to have high bit-error-rate.
 

 3. 

Attenuators should reduce the receiver power to around the middle of the receiver's operating range.
 

 4. 

Attenuators are never sensitive to the type or size of fiber in the cable plant.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 5. 

The ________ of a fiber optic data link is a measure of the cable plant attenuation that that link can tolerate.
a.
Link loss budget
b.
Power Budget
c.
Operating range
d.
Bit error rate
 

 6. 

The difference between the link power budget and the cable plant loss budget is the link's  ______.
a.
Link margin
b.
Overload
c.
Operating range
d.
Attenuation
 

 7. 

The attenuator is always added near the _______ of the link.
a.
Transmitter
b.
Receiver
c.
Patch panel
d.
Middle
 

 8. 

If a transmitter has an output of 0 dBm, the cable plant has  a loss of 5 dB and the operating range of the receiver is -10 dBm to -30 dBm, which  attenuator should be chosen?
a.
No attenuator is needed
b.
5 dB
c.
15 dB
d.
25 dB
 

 9. 

If a transmitter has an output of 0 dBm, the cable plant has  a loss of 15 dB and the operating range of the receiver is -10 dBm to -30 dBm, which  attenuator should be chosen?
a.
No attenuator is needed
b.
15 dB
c.
20 dB
d.
25 dB
 

Multiple Response
Identify one or more choices that best complete the statement or answer the question.
 

 10. 

The amount of attenuation necessary in a fiber optic link can be determined by _________ or ___________.
 a.
Measuring receiver power with an optical power meter
 b.
Calculating it from the link specifications and the cable plant link loss budget
 c.
Analyzing an OTDR trace of the cable plant
 d.
Measuring transmitter power with an optical power meter
 



 
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