User's Manual

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620003-0 Rev. A
PRELIMINARY Optical Power Budget
8.5 Optical Power Budget
Unison uses SC/APC connectors. The connector losses associated with mating to
these connectors is accounted for in the design and should not be included as ele-
ments of the optical power budget. The reason is that when the optical power budget
is defined, measurements are taken with these connectors in place.
The Unison optical power budget for both multimode and single-mode fiber cable is
3.0 dB (optical).
The maximum loss through the fiber can not exceed 3 dB (optical). The maximum
lengths of the fiber cable should not exceed 1.5 km
(4,921 ft) for multimode and 6 km
(19,685 ft) for single-mode. Both the optical budget and the maximum cable length
must be taken into consideration when designing the system.