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A measurement issue in Signal generator and Spectrum Analyzer

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Anomis

Anomis

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Hi all,
I need a help for this stuff:
20190802_003245.jpg
I set 10 dBm for output signal @ 2.5 GHz by Signal generator (Agilent E4438C), however my spectrum analyzer shows up the level of above 15 dBm. I already tried to adjust Reference level and RBW/VBW but it happens to be like not any right sense. Could anybody know it ? please leave an explaination.
Thank you,
 

ALC is OFF , try with ON .. Signal Generator may have a calibration error or both..
 

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