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NF problem on PNAX

Question asked by sookfoong on Oct 2, 2013
Latest reply on Oct 15, 2013 by sookfoong
Dear Sir,

I came across a weird case in measuring NF on PNAX.

I found that the NF from 6GHz to 12GHz is abnormal.
So, I connected a THRU without any CALIBRATION done, I observed that the NF suddenly shoots up to 9dB at 6GHz all the way to 12GHz then coming down.

Attached is the screen capture.

Do you have any idea on this?
 
Thanks.  

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