Black Box 39004 User Manual page 19

T1 FIBER OPTIC LINE EXTENDER/SIMULATOR
(max, cable [2] att.)=(fiber optic power budge) - (right part att.) = 17 dB - 12 dB =
5 dB.
(max. cable [2] length) = (max.cable [2] att.)/(cable [2] att. factor) =
5 dB/3 dB/km = 5.6 km
Example 2: Maximum length of cable [2] when connected directly (without
splices, etc.): (max. cable [2] length) = (fiber optic power budget)/(cable [2] att.
factor) = 17 dB/3 dB/km = 5.6 km
Example 3: Minimum cable quality to bridge 5 km (single cable without splices or
patches): (cable att. factor) = (cable att.)/(cable length) = 17 dB (fiber optic power
budget)/5 km = 3.4 dB/km
T1 Fiber Optic Line
Extender/Simulator
1
2
4
T1 Fiber Optic Line
Extender/Simulator
3
5
7
1
6
3
2
5
4
6
7
Figure A-1. Attenuation diagram.
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