Electronics > Repair
Agilent 34461A corrupted flash
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dc101:
Yeah the Win CE bootloader boots from RAM by default, so I have to load the RAM image from flash every boot. I can't make the nk.bin images recognized as valid images when written to flash. And I can't get the firmware update to work from USB or ethernet. I've tried converting nk.bin into an nk.nb0 image and writing that to flash but that didn't work either. Maybe using u-boot to write to flash is bypassing the built-in ECC? Kind of at a loss right now.

While I'm pretty happy my meter still seems to pretty much work, it's also pretty frustrating to not get any support from HP/Agilent/Keysight. Sadly, it's a stark contrast to the experience I had with Rohde & Schwarz when the FFT filters on my FSP3 stopped working. I bought it used years after it was EOL, and still got an email from the R&S support staff with a copy of the firmware and instructions on reloading the firmware.
TheSteve:
What happens if you enter the Boot Loader Config menu, then load an image via the platform builder(network) option. That should get you booted, then perform a firmware update via the front panel USB?
dc101:
I haven't been able to figure out how to present the nk.bin image from platform builder to my meter. I have a virtual machine with Windows CE 6.0 and platform builder SP 1 installed, but I have very little experience with Windows CE/Windows Embedded. I've been able to look at the nk.bin in platform builder, but that's as far as I've gone. It's the reason why I setup the virtual machine, but I just haven't figured out how to load an nk.bin for another device to boot from.
TheSteve:
Forget the true platform builder program. You want to use celoader. You can grab it from here:
https://www.eevblog.com/forum/testgear/dsox2000-and-3000-series-licence-have-anyone-tried-to-hack-that-scope/msg1022267/#msg1022267

Then on a windows machine run it from a command prompt window with an uncompressed nk.bin file. It will open a port on the machine with the custom tftp port needed for platform builder. When you select boot from platform builder on the 34461A it should find the machine serving the file, download and boot it.
Dr. Frank:
Well folks,
you both do a great job ..

Just an idea concerning the 460/461 versus the 465/470:

If I remember correctly, the 460/461 came out earlier, brand still being agilent.
The main board already contained the full schematic for the later 465/470 functionality, but these additional components were not yet assembled.

The 465/470 were published under the new brand Keysight, they got a slightly updated PCB version, and the Memory option probably requires more DRAM or Flash space (I don't know where they store these data, in Flash, or in a battery backed up SRAM).

Therefore, the front panel PCB might also have more memory space and a slightly different memory map than the 460/461.. probably the PCB itself is  identical.

I could check / compare this if you tell me exactly where / what to look for, also via the monitor program.

Frank   
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