When using MT ni5660 phase noise.vi readings at 10KHz and 100KHz offset are both -88dBc/Hz.

[Hands]

Hi

I am trying to measure phase noise at 10KHz and 100KHz offset using MT ni5660 phase noise vi as shipped with modulation toolkit. Both results at offsets are -88dBc/Hz, I am expecting -62dBc/Hz at 10KHz offset and -85dBc/Hz at 100Khz offset as measured on hp8560A spectrum analyser. I am using pxi 5600 downconverter and pxi 5620 digitizer with labVIEW 2012. I have only been using PXI for a little while so am not to familiar with it. Any ideas as too what i am doing wrong or have not set up correctly.

[DanHarryman]

Hi Hands

Thanks for your post. Do you get this only when you have 10KHz or 100KHz? I'm curious to know what this device displays at other frequency ranges if possible? 

Many thanks 

Dan.H 

National Instruments 

UKAE