DEC PORTswitch 900FP, Руководство по установке и настройке

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10BaseFL Loss Budget
Fiber-Optic Loss Budget B–3
Table B-1: 10BaseFL Worst-Case Loss Budget (0ºC to 50ºC, End of
Life
7
)
Measurement
Unit of
Measure
Multimode, Graded Index Fiber Size (Microns)
50/125 62.5/125 85/125 100/140
Numerical
aperture NA 0.2 0.275 0.26 0.3
Minimum
average
transmit power
(P
T(avg)
)
dBm -22.8 -19.0 -16.8 -13.5
Minimum
average receive
sensitivity
(P
R(avg)
)
dBm -32.5 -32.5 -32.5 -32.5
10BaseFL loss
budget
(P
T(avg)
- P
R(avg)
)
dB 9.7 13.5 15.7 19.0
_____________________________ Note ________________________
To ensure accurate measurements, do not measure optical power
levels from cables connected to ports that are operating as
responders in a redundant-link configuration. Refer to Appendix
A, Redundant Link Configuration
_______________________________________________________________
7
No additional degradation is used. It is included in the vendor’s
specified power calculations.