Trane Tracer Summit Hardware And Software Installation Manual page 83

Chapter 4 UCM Communication-Link Wiring
68
optic cables and professionally spliced and/or terminated cables should
ensure minimal decibel loss.
To calculate the system loss, subtract the cable loss, splice loss, termina-
tor loss, and patch panel loss from the power budget. The example below
shows typical values for the UCM communication link.
power budget – system safety margin = available budget
14 dB – 3 dB = 11 dB (available budget)
available budget:
cable loss:
allowance for splice loss:
allowance for end connectors:
allowance for patch panel:
excess margin:
11 dB
– 7.5 dB (1 km at 3.75 dB/km)
– 1 dB (2 at .5 dB)
– 1 dB (2 at .5 dB)
– 1 dB (2 at .5 dB)
= 0.5 dB
BMTW-SVN01F-EN