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HMC521A RF & LO input Interface Schematic

Hi all,

Is the LO port capable of DC input @ HMC521A ?

Both the RF and LO ports are written in the data sheet as "This pin is AC coupled and matched to 50Ω."
We are confused by the notation of the input terminating resistor (50Ω?).

Is the LO interface schematic in the datasheet really correct?
I guess the correct circuit is similar to the RF interface schematic.

Best regards,

edit schem
[edited by: sss@jpn at 9:26 AM (GMT -4) on 2 Aug 2021]
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