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Port isolation in a mixer question

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STOIKOV

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Port isolation

to measure the isolation port LO-to-IF and RF-to-LO in a mixer, there must not be the vco connected to the LO port ? what about if RF-LO-IF ports are differential and the instruments are single-ended ?
 

Port isolation

hi
answer of your first question is No VCO must be connected to LO port.
you must convert diffrential to single ended by "balun" .
 

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    STOIKOV

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