Why is the Noise Figure application closing down the spectrum analyzer application on my X-Series analyzer when I try to switch into Noise Figure m...

You can fix this issue without sending the analyzer in for repair by doing the following steps:

1. Using Windows Explorer, navigate to D:\User_My_Documents\Instrument\My Documents\system
2. Delete the files in the system folder
3. Next navigate to D:\User_My_Documents\Instrument\My Documents\NFIG\state
4. Delete the files in the state folder
5. Now navigate to D:\User_My_Documents\Instrument\My Documents\System
6. Delete the files in the system folder
7. Cycle the power on the analyzer
8. Once the analyzer is sweeping again, perform a mode switch from Spectrum Analyzer to Noise Figure and back again and everything should mode switch fine
9. Cycle the power on the analyzer (yes, a 2nd time is needed)
10. Once the analyzer is sweeping again, perform a mode switch from Spectrum Analyzer to Noise Figure and back again and re-verify that the mode switch is fine
11. If there is still an issue, please go to: http://www.agilent.com/find/support