Table 2-4 shows the range of loss and the typical loss as a result of splice.

Table 2-4. Connector and Splice Insertion Loss

Connector Type

Range of Loss Per

Typical Loss (dB)

Pair (dB)

 

 

 

 

 

SMA Patch Panel

1.0 to 3.0

2.0

 

 

 

ST or FC Patch Panel

0.1 to 0.75

0.5

 

 

 

Splice Type

Range of Loss (dB)

Typical Loss (dB)

 

 

 

Fusion

0.01 to 0.1

0.05

 

 

 

Mechanical

0.2 to 1.0

0.5

 

 

 

Optical Fiber Loss

Even though fiber optic cable can carry light signals over a long distance, optical power loss is a significant factor. Check your cable manufacturer's rating of the loss characteristic of your fiber cable to determine the actual loss.

Table 2-5 shows typical power losses in fiber optic cables.

Table 2-5. Typical Fiber Loss Characteristics

Fiber Type @ 850 nM

Loss (dB/km)

Typical Loss (dB/km)

 

 

 

50/125 micron

3 to 5

3.75

 

 

 

62.5/125 micron

3 to 5

3.75

 

 

 

85/125 micron

3 to 6

4.0

 

 

 

100/140 micron

3 to 6

5.0

 

 

 

2 - 10 ONline Ethernet 10BASE-FL Installation and Operation Guide

Page 32
Image 32
3Com 5104M-FL1 Connector and Splice Insertion Loss, Connector Type Range of Loss Per Typical Loss dB Pair dB