2007-03-12 Better measurement

In the previous entry, I talked about correcting offsets when measuring with the FFO board. We've also made an improvement in the measurement itself. The ADC has lots of options for measuring, amongst them one that takes more time to do measurements. The ADC always takes multiple measurements and then takes the mean (this might be a bit simplified). When taking more time, this results in more measurements taken and a more reliable mean measurement. When plotted, the difference was really noticeable:

better res.png

The jagged line is the fast measurement mode, the smooth line is the mode where more time is taken. It's a tradeoff naturally.