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Well, apparently I've been living right because on a Hail Mary sweep through my various virtual machines I found a snapshot from what must have been the first failed update attempt, and its backup directory includes an EPROM1 file that is not zero length.
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I copied that into the updater program backup directory (replacing the 0-length file that was there). Then I did the "failed instrument" procedure that reinstalls the OS and recovers the config. Following that I seem to have the coefficients back. I have a sneaking suspicion that just doing the OS reinstall alone, without having backup files available, might do the same thing. The reinstall completely wipes and rebuilds the flash from nothing, so I wonder if in the process it pulls the cal data in from wherever it's stored in the machine. There's a hint about that in the updater program help files which mention that a failed update won't affect calibration. I don't have time to test that hypothesis right now, though. John ---- On 1/4/24 12:36, John Ackermann N8UR via groups.io wrote:
After 18 months I'm getting back to my E4406A.? My problem was/is that a failed firmware upgrade attempt left me with no synthesizer cal coefficients -- a 0 byte EEPROM1 file in the backup created on the WinXP machine. |
