User's Manual
AdvancedRFTechnologies,Inc. 59
Optic loss compensation should be performed when the color of “Commissioning” button is orange.The
“Commissioning” button will turn orange when the difference between the compensated attenuation and the
actualcompensatedattenuationlevelisgreaterthan1.5dB.Opticcompensationcanbeperformedbyclickingthe
orange“Commissioning”button.
The
opticlosscompensationforuplinkanddownlinkareperformedseparately.
‐ The opticloss compensationfor downlink will be performed based on the LD level of the ODU
andthePDleveloftheMasterRU.
‐ The optic loss compensation for uplink will be performed based on the LD
level of the Master
HPRandthePDleveloftheODU.
OpticlosscompensationadjuststheattenuationbasedonTable7‐1andthecalculatedopticloss(LDlevel‐PD
Level).
‐ Thecalculatedopticlossisdisplayedwhenamouseisplacedonthecircleofeachlink.
(Referto
section7.2.1.1)
‐ Based onthe tablebelow, when the calculated optic loss is 1dB, the attenuationwill be setto
11dB.
‐ TheattenuatorfordownlinkopticlosscompensationislocatedattheMasterRU.
‐ Theattenuatorsforuplinkopticlosscompensationarelocatedatthe
ODU.
Table7‐1 Opticlosscompensationtable
OpticLoss(dBo) CompensatedAttenuation(dB)
0 13
0.5 12
1 11
2 9
3 7
4 5
5 3
Example:Let’ssaythatthisADX‐H‐ODUhadpreviouslybeencommissionedinasystemwheretheopticloss
was3dBo.Intheprevioussystem,thecorrectamountofattenuationis7dB.TheADX‐H‐ODUwasmovedto
another site and the new system has an optic
loss of only 1dBo.At 1dBo of loss, the correct amount of
attenuation should be 11 dB.When this systempowers on, opticcommissioningwillneed to be performed
becausethedifferencebetweentheoldattenuationlevelandthenewattenuationlevelis4dBwhichexceeds
the1.5dBthreshold.Once
opticcommissioningisperformed,itwillsettheattenautionlevelto11dB.