| Products > Test Equipment |
| DIY scan card for Keysight 34970A |
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| voltsandjolts:
I've never tried, but the Chinese clone 34901A uses their own firmware, so I'd bet the original is locked and unreadable. Anyway, I don't want to fraudulently use their copyrighted firmware. Honest open firmware is better, even if it has some foibles. |
| free_electron:
--- Quote from: voltsandjolts on June 01, 2022, 08:04:19 pm ---I've never tried, but the Chinese clone 34901A uses their own firmware, so I'd bet the original is locked and unreadable. Anyway, I don't want to fraudulently use their copyrighted firmware. Honest open firmware is better, even if it has some foibles. --- End quote --- you don't have to use it. simply decompile it. it's 4kilobyte... |
| strawberry:
when in scan mode card sends channel status open/close ? I guess Chinese dont have thing like copyright Agilent/Keysight... maybe still hold copyright back to 70's. Service manuals containing schematics are edited out on their website. |
| Kleinstein:
The copyright for the old HP code still holds, however this only covers the direct copy of the code, not the functionality. As from international treaties the copyrights also applies in China - they just don't enforce it as strict. AFAIK it's for a minimum of 75 years. So not much computer code were the copyright has expired yet. As the function is relatively simple, there is no big issue in reprogramming it. This gives the freedom in using a difference µC type or just different pins and for te DIY version maybe alternative functions. |
| voltsandjolts:
--- Quote from: free_electron on June 01, 2022, 11:23:47 pm --- --- Quote from: voltsandjolts on June 01, 2022, 08:04:19 pm ---I've never tried, but the Chinese clone 34901A uses their own firmware, so I'd bet the original is locked and unreadable. Anyway, I don't want to fraudulently use their copyrighted firmware. Honest open firmware is better, even if it has some foibles. --- End quote --- you don't have to use it. simply decompile it. it's 4kilobyte... --- End quote --- Sure, but then you are 'tainted' having seen the proprietary code, and you can no longer be part of any 'cleanroom' open source firmware effort. Whereas, observing the functionality of the device is legal. |
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