Installation Tools Required

Estimate the power budget as follows:

PB = 11.5 dB – 11 km (0.5 dB/km) – 10 (0.5 dB)

PB = 11.5 dB – 5.5 dB – 5 dB

PB = 1 dB

The resulting power budget (PB) value of 1 dB indicates that this link would have sufficient power for transmission and would not exceed the maximum receiver input power.

Using Statistics to Estimate the Power Budget

Statistical models are more accurate in determining the power budget than “worst-case” methods.

Determining the link loss with statistical methods requires accurate knowledge of variations in the data link components. However, statistical power budget analysis is beyond the scope of this document.

For further information on this topic, refer to the UNI Forum specifications, ITU-T standards, and your equipment specifications.