After using the Keithley 236 SMU a lot in the last months without any problems, it suddenly showed the message "IOU Cal Checksum Error" and "IOU EEROM Failed" after power on. Additionally, while booting, it strangely showed a GPIB address different to the one set in the menu. It also was not possibl...
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HP/Agilent 6632B Repair
This is the second 6632B, that I bought from eBay in condition "For parts or not working". I repaired it about 2 years ago, but after receiving some questions about the 6632B via email, I thought this article could be helpful to others.
The inside of the unit was very dusty, but after cleaning the...
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Marconi IFR 2023 / 2024 Error 508 Repair
Recently, I have bought a defective Marconi IFR 2023A signal generator from eBay. The listing said "parts or repair unit" and that the power supply is missing.
Missing power supply
The Marconi needs 5V,+/-12V and 24V, therefore I replaced the missing power supply with a Meanwell RQ-125D. The cur...
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HP 66332A Pulse Measurement
After converting my HP 6632B to 66332A like I described in a previous post, I now wanted to test the new features.
Therefore I converted the example program from the "Pulse Measurement Queries" section of the programming guide to a simple python script for my GPIB Adapter and the Instrument...
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