User Manual

SystemDescription
10
Point of Interconnect (POI)
ThePointofInterconnect(POI)contains41:8splittersandsomeattenuators.Thisisacouplingfieldusedtotie
togetherthesignalsbetweentheBIUsandtheFOIsinamultiplebandormultipleoperatorsystem.
Figure 5 Point of Interconnect (POI)
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Eachofthe4fieldshasaCOMMONportandports1‐8.Ifusedasacombinerthenthesignalstocombineare
connectedtoports1‐8andthesumofthesignals(minusinsertionloss)isoutputontheCOMMONport.
Whenuse
dasasplitter,thecombinedsignalisinputontheCOMMONportandequalsignalsofthesamestrength
(minusinsertionloss)areoutputonports1‐8.
Table 6 POI Specifications
Parameter Value
InsertionlossCO
MMONtoanyport1:8 35dB,Nominal
IM3perf
ormance >50dB
Returnlossper
formance >20dB
Maximumsi
gnalinputlevel 20dBm
Isolationbe
tweenportsinsamestrip >15dB
Isolationbe
tweenportsindifferentstrips >60dB