(fyi: I posted also in volt-nuts)
Next chapter of that probably never ending story...
As already mentioned some time ago in this post, I like to backup the Datron 1281 CAL RAM data. Mine need to be refurbished (caps replacement, case cleaning...)
The 1281 is still quite good in cal (~3ppm difference to my 3458A which had last cal 2014/OCT), which I don't want to risk.
In any case this migh a helful knowledge for all of us.
I am lucky having another 1281 "for part" without a Display- and DC-Assembly but a working Digital Board.
I dumped the ROM to have a deep look into the GPIB commands and searched for potential undocumented existing
(like it was done for the 3458A already).
I found following, in the service and user manual not documented, potential commands (?):
RAM = may a RAM command, seems to be the best chance
PRIM = may a subfunction of RAM for primary RAM
SECN = may a subfunction of RAM for secondary RAM
IPZ = no glue yet
YEUK = command to set something, no glue yet about function
YEUK? = query of the YEUK command
CALISS? = seems to be a qery for calibration purpose
To (hopefully) save some of the allways limited private time, I would like to aks, if some of you have seen that commands (?) and has details on them. They may used at other Daltron tools also...
Next I will start with the debugging of the unknown remaining commands on processor board level.
Thanks for help already in advance.
BR
PeLuLe
PS: I just have uploaded the complete 1281 service manual to KO4BB as the company, holding the copywriigth has closed business and has given all doc and rights the "Internet Archive".