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.
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.
I'd replace the battery. It is a little odd that the time is still correct when the GP-IB address is lost, but that would still be the first thing I would try to fix it.
The battery is part number 1420-0314C and it is located on the CPU Board. (This battery is a Panasonic 3V P/N BR2325.) If you have never changed one before I'd set a side about an hour.
You'll need a static safe work environment. Remove the rear feet, the side handles, the cover, the top brace, the SCSI or USB card (if present) and the digital IF board. Then you can remove the CPU board from the rear panel and the battery can be replaced.
This procedure doesn't impact the RF path and should have not effect on performance.
Best regards,