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university:tools:m1k:alice:advanced-equivalent-time-sampling-guide [30 Apr 2020 16:38] – [Sub-sampled waveform capture] Doug Merceruniversity:tools:m1k:alice:advanced-equivalent-time-sampling-guide [27 Jan 2021 22:37] (current) – use wp> interwiki links Robin Getz
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 ====Input Frequency Compensation==== ====Input Frequency Compensation====
  
-The software frequency compensation for each channel consists of a cascade of two adjustable [[https://en.wikipedia.org/wiki/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.
  
 This functionality is generally used to compensate for a low pass response that might be introduced when using external resistor dividers and the internal input capacitance of the ALM1000 AIN and BIN pins. These software frequency compensation filters can also be used to compensate for the internal 100 KHz anti-alias filter in the ETS mode. Based on the time scale multiplication factor appropriate time constant and gain factors can be calculated from fixed values for any given multiplier. This functionality is generally used to compensate for a low pass response that might be introduced when using external resistor dividers and the internal input capacitance of the ALM1000 AIN and BIN pins. These software frequency compensation filters can also be used to compensate for the internal 100 KHz anti-alias filter in the ETS mode. Based on the time scale multiplication factor appropriate time constant and gain factors can be calculated from fixed values for any given multiplier.
university/tools/m1k/alice/advanced-equivalent-time-sampling-guide.txt · Last modified: 27 Jan 2021 22:37 by Robin Getz

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