User's Manual Part 1

SystemDescription
14
Rack-mount ICU (DIU301, DIU302)
TheRack‐moun
tICUisa1Uunitthatcontainsfourfieldscontainingsplitters/combiners.Eachfieldiscapableof
splittingoneinputintoeightoutputsorcombiningeightinputsintooneoutput.
Figure 10 Rack-mount ICU
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Eachofthe4fieldshasaCOMMONportandports1‐8.
 Whenusedasacombiner,thesignalstocombineareconnectedtoinputports1‐8,thesumofthesignals
(minusinsertionloss)willbeoutputontheCOMMONport.
 Whenusedasasplitter,thecombinedsignalisinputontheCOMMONportandoutputonports1‐8,with
theoutputportshavingbalancedsignals(minusinsertionloss).
Table 8 Rack-mount ICU Specifications
QMA cable kit
AQMAcablekit(B
irdpartnumberDCC320)isavailableforusewiththeICU.Thekitcontains32QMAtoQMAcables
(see
Table9 )thatcanbeusedtopatchbetweentheBIUtotheICU,BIUtotheFOIorICUtoFOI.
Table 9 QMA Cable Kit
Parameter Value
Insertionloss(nominal)‐DIU301 37dB
Insertionloss(nominal)‐DIU302 21dB
Bandwidth‐DIU301 88‐2700MHz
Bandwidth‐DIU302 88‐2700MHz
OperatingTe mperature ‐25to+55C(‐13to+131F)
Impedance 50Ohm
IM3performance >50dB
Returnlossperformance >20dB
Maximumcommonportpower 20dBm
Isolationbetweenportsinsamestrip >15dB
Isolationbetweenportsindif
ferent
strips >50dB
Length Quantity
250mm(9.8”) 13
350mm(13.8”) 13
500mm(19.7”) 6