GarrettCom P62 Manual De Usuario

Magnum P62-Series Hardened Switches                               Installation and User Guide (11/03)

 

 

 

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longer distances, about 20Km with the single-mode SC. 

The same procedures as for multi-mode fiber apply to single-mode fiber connectors.  

Follow the steps listed in Section 3.2.2 above. 

Receiver Sensitivity and Transmitter Power are the parameters necessary to compute 

the power budget. To calculate the power budget of different fiber media installations using 
Magnum products, the following equations should be used: 
OPB (Optical Power Budget) = P

T

(min) - P

R

(min) 

          

 where P

T 

 = Transmitter Output Power, and P

R

 =  Receiver Sensitivity 

 
     Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss) 
     Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km] 
where the “Cable Loss” for 62.5/125 and 50/125

µm

 (m.m.) is 2.8 dB/km,   

 

and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km, 

 

and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km 

 
The following data has been collected from component manufacturer’s (HP’s and Siemens’) web 
sites and catalogs to provide guidance to network designers and installers. 
 

µm 

P62- 

xMSC 

FX 

Multi-

mode 

2 

(0.4) 

1300

62.5/125

50/125 

-20 

-23.5 

-31 

-31 

9.0 

5.5 

2.5 

2.0 

14 

12 

5 

4 

P62- 

xSSC 

FX 

Single-

mode 

20 

(0.4) 

1300

9/125 

 

   

 

 

-15

-31

14

28

17.5

35 

“Long  

Reach” 

FX 

Single-

mode 

40   

(0.4) 

1300

9/125   

   

 

 

 

-5

-34

27

54

32.5

65

 
* Note:  The use of either multi-mode or single-mode fiber to operate at 100Mbps speed over long 

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