Electronics > Repair
Agilent 34461A corrupted flash
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dc101:
I believe your correct. I was actually just reading over some u-boot web pages again this morning and had the same thought. http://www.denx.de/wiki/view/DULG/UBootCmdGroupInfo

It might be a good idea to run protect off all after you finish, for exactly the reason you mentioned. Or alternatively you do not have to run the protect command in the beginning.

At the time I was using Putty as my terminal program and it has a rather annoying "feature" where anything that is highlighted by the mouse is automatically copied to the clipboard and just right clicking the mouse button will paste whatever is currently in the clipboard. This is what got me in trouble when I was trying to restore nk.bin. This is also why I recommended MobaXterm, at least there you have to explicitly select copy and paste.
Dr. Frank:
OK, thanks, all went fine, appended dump to my recent post.
Have fun, and please report back if this could fix your 34461A!
Frank
dc101:
Well that definitely did the trick, it's able to boot the windows ce kernel (pboot)! Now I need to see about reflashing nk.bin to correct places and see if it will boot up fully, or if there are in fact other issues with my meter. Thanks again!
dc101:
Well the journey continues. PBOOT is working, however it seems that the version of nk.bin that comes with the official firmware update is not in the correct format be loaded directly from ram, or stored in flash and loaded into ram. The attached screenshot shows what the meter looks like after trying to put from nk.bin.

I've read some forum posts regarding Keysight scopes having success booting from the Windows CE platform builder, so I'm attempting to try that now. I'm in the process of updating my Windows XP CE development machine, and will report back with any news.

Cheers
-Tim
ddcc:
I was curious, so I took a quick look. The NK.bin file is stored in the compressed XPRS format, so you could try decompressing it first. See https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1035605/#msg1035605 for a direct link to bincompress.exe, or you can probably find it somewhere in the Windows CE SDK.
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