Originally posted by Andrey Sobol:
Hi guys,
How can I calculate coefficients for input filter from basic ones a0,a1,b0,b1 IIR or FIR filter?
Oscilloscope input filters
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- Posts: 67
- Joined: Wed May 28, 2014 12:15 pm
Re: Oscilloscope input filters
More detailed information about input filter can be found here: http://wiki.redpitaya.com/index.php?tit ... ifications
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- Posts: 67
- Joined: Wed May 28, 2014 12:15 pm
Re: Oscilloscope input filters
We believe the response you attached is correct. The applied filter coefficients introduce a pole and a zero at kHz range (we call that equalization filter). The smoothing filter is here disabled (pp=0).
You can better visualize that by replacing the plot function with semilogx. The equalization filter is used to cancel out extra poles and zeros introduced by probes or capacitive dividers.
You can better visualize that by replacing the plot function with semilogx. The equalization filter is used to cancel out extra poles and zeros introduced by probes or capacitive dividers.
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