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ADRF6520 in/out system connection

I'm confusing about this part's output network description in user guide.

There are 2 channels (OPP1/OPM1) (OPP2/OPM2) with 20ohm differential impedance.

How could I connect to next stage by 100ohm diff pairs from output pin? 

Btw, is it necessary connect input to previous stage by 100ohm diff pairs directly w/o T1/T2 balun?

Thanks.