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university:courses:alm1k:circuits1:alm-measure-outside-0-5-range [05 Sep 2021 22:14]
Doug Mercer add off the shelf dividers
university:courses:alm1k:circuits1:alm-measure-outside-0-5-range [01 Jul 2022 15:49]
Doug Mercer [Background:]
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 The software frequency compensation for each channel consists of a cascade of two adjustable [[wp>​High-pass_filter#​Algorithmic_implementation| first order high pass filters]]. The time constant and the gain of each stage can be adjusted. Normal first order high pass filters do not pass DC so a DC gain of 1 path is added to the overall second order high pass software compensation filter. This structure is often called a shelving filter because of the shape of its frequency response. The software frequency compensation for each channel consists of a cascade of two adjustable [[wp>​High-pass_filter#​Algorithmic_implementation| first order high pass filters]]. The time constant and the gain of each stage can be adjusted. Normal first order high pass filters do not pass DC so a DC gain of 1 path is added to the overall second order high pass software compensation filter. This structure is often called a shelving filter because of the shape of its frequency response.
 +
 +<note tip>
 +**Exponential compensation**\\
 +An Exponential compensation technique adds one or more exponentially decaying terms to a step in the signal. With 2 available stages, ALICE can correct for multiple spurious inductances and capacitances in the input divider circuit. Exponential compensation works best for overshoots and undershoots smaller than about 10% of the step height. In this case, a sum of exponential terms is an accurate generic model for such defects.
 +</​note>​
  
 In figure 2 we show the controls for the input frequency compensation. To turn on and off the compensation for Channels A and B check boxes are available under the Curves drop down menu. Turning on compensation applies to both the Scope and Spectrum tools (time and frequency measurements). The filter time constant and gain settings can be set using entry slots in the Settings Controls screen. In figure 2 we show the controls for the input frequency compensation. To turn on and off the compensation for Channels A and B check boxes are available under the Curves drop down menu. Turning on compensation applies to both the Scope and Spectrum tools (time and frequency measurements). The filter time constant and gain settings can be set using entry slots in the Settings Controls screen.
university/courses/alm1k/circuits1/alm-measure-outside-0-5-range.txt · Last modified: 01 Jul 2022 15:49 by Doug Mercer