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HP / Agilent 34401A hidden menu
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dimmog:

--- Quote from: coromonadalix on September 12, 2020, 09:36:29 pm ---are you talking about theses ? 


D: SYS MENU
9: STORE STATE > 10: RCL STATE > 11: POWER ON

--- End quote ---

Yes
coromonadalix:
and the

G: TEMP MENU
1: TEMP FUNC > 2: UNITS > 3: RTD TYPE 4: RTD Ro > 5: T/C TYPE > 6: THERM TYPE > 7: JUNCT TEMP

how do you know if its in the eeprom bin ??
dimmog:

--- Quote from: coromonadalix on September 12, 2020, 09:43:34 pm ---and the

G: TEMP MENU
1: TEMP FUNC > 2: UNITS > 3: RTD TYPE 4: RTD Ro > 5: T/C TYPE > 6: THERM TYPE > 7: JUNCT TEMP

how do you know if its in the eeprom bin ??

--- End quote ---

As I said, in my eeprom I have only 'store state' option.  I've never seen 34401A with active Temp menu.
coromonadalix:
ok     :-+  thks   will try    when ill find my ic's sockets, dont know where i put them loll
meandeev:
I´m also interested in decoding the eeprom in the 34401A!

I my experiments with the  eeprom I was able only to decode the calibration message string (the string that can be set with GPIB "CAL:STR xxxxx").
(https://www.eevblog.com/forum/repair/hpagilent-34401a-eeprom-checksums/msg950165/#msg950165)

This message-string is stored in the eeprom-bin-file at position 0x22, the checksum is in 0x4a und 0x4b, but I don´t know the algorithm :-(

Time to disassemble the ROM?  :-)

@coromonadalix: there´s no need for an adapter, if you have an eeprom-reader : https://www.eevblog.com/forum/metrology/read-and-restore-calibration-constants-from-a-hp-34401a/msg1743833/#msg1743833
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