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@ -55,7 +55,7 @@ Another healthy upgrade I did was to update the firmware to the latest version,
## U180 drift evaluation ## U180 drift evaluation
Now the big question with any 3458A project is whether the U180 ASIC at the heart of the meter is still in good condition. This requires an extensive check, powering the meter and monitoring the calibration constants from the ACAL DCV. For this, a toolkit was written. And although this is a rather short data capture, several captures were made. All with similar results in terms of the drift observed. Now the big question with any 3458A project is whether the U180 ASIC at the heart of the meter is still in good condition. This requires an extensive check, powering the meter and monitoring the calibration constants from the ACAL DCV. For this, a toolkit was written. And although this is a rather short data capture, several captures were made. All with similar results in terms of the drift observed.
![u180-drift](3458-WorkLog/U180-drift.png) ![u180-drift](3458-WorkLog/u180-drift.png)
## Improving ## Improving
If one looks at semiconductor ageing there are a few things we can do to improve the stability in the long term. If one looks at semiconductor ageing there are a few things we can do to improve the stability in the long term.