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Using Direct Clock on AD9081

Category: Software
Product Number: AD9081

Hello,

We would like to use AD9081 Direct Clock. (12GHz)

The datasheet says 0 to 6 dBm range when Direct RF input.

ez.analog.com/.../using-an-external-clock-with-ad9081-fmca-ebz

However, when we tried it, we found that it works only when we input higher power like the answer above.

(12GHz, 15 dBm or more , Source : Keysight E8257D)

When input below 9.5 GHz, it operates below 6 dBm.

Is it okay to use Direct CLK input at 12GHz with such a high input?

If not, is there anything I need to set up?

Thank you!