ADL5387 and ADL5385 spurious issue

Hello ,

       We find there are some spurious(like as little oscillation) from ADL5387 and ADL5385 chip when we make system evaluation.

There are also similar spurious signal on this two evaluation board.

Attached is the drawing that measure from LO port and terminate other port.

These spurious will affect our system performance very much.

Could help us to eliminate these spurious generation or has new version chip without this problem , please ?

Thank you.

--Paul