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Directional coupler ' problem

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CQCQ

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Hi! I have a Directional coupler with four CPL ports,I dont know what is difference between the four CPL ports,?From the "performance data" I see the coupling is 30dB,So If I connect four CPL ports can reach 120dB? or still 30dB?and I dont know what the "isolation cpl-cpl"means in the performance.
THS!


CQCQ
 

I guess the four coupled ports are the same: each of them has a coupling of 30 dB, relative the input port. Then there is an internal isolation between each of the coupled ports, having the value in the column "Isolation (dB) Cpl-Cpl". You cannot get 120 dB with this device.
 

biff44 said:
What are the total number of rf connectors on this coupler?
Click to expand...

one INPUT,one OUTPUT. THS!
 

According to the diagram above there are six connectors...
 

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