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8561E Reference Level cannot be adjusted

Question asked by vjsilva1 on Jun 7, 2010
Latest reply on Jun 19, 2010 by vjsilva1
I have an 8561E that passes all diags and can display a consistent trace when swept through its full bandwidth. The problem is when I perform the Reference Level Calibration as shown in the User's Guide, Chpt 1the peak is too high.

I set the center to 300Mhz, Span to 20Mhz but the peak that is there is not -10dB, but slightly higher than 0dB. The Ref Level Adj between -528 and +528 barely varies the peak. Also the AmpCorr entries all seems to be empty. Is this possible a Calibration issue?

Thanks for any input.