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GPIB address is not saved in spectrum analyzer(E4443A)

Question asked by talking on Aug 19, 2008
Latest reply on Sep 19, 2008 by jborges3
I'm using E4443A, and the GPIB address which the spectrum analyzer saves by default is 18.

If I input the number 19 to manually change GPIB address, and turn off the E4443A then turn it on again immediately, the number 19 is still saved. But it's changed back to 18 (default GPIB address) when I turned it on after one day.

Is there any idea to save 19 as the default GPIB address?
I also checked the date because I was suspecting the low battery. But the date is close to today.