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Math Channel Filters , filter characteristics??

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Math Channel Filters , filter characteristics??

Postby n3mmr » Wed Mar 09, 2016 3:05 pm

What are the filter characteristics for the filters available in Maths Channel -> Create -> Advanced/Filters??
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Re: Math Channel Filters , filter characteristics??

Postby AndrewA » Thu Mar 10, 2016 4:12 pm

Hi,

Please see the PicoScope 6 User's Guide, page 76 - Advanced buttons (Filters group)
https://www.picotech.com/download/manuals/picoscope6-oscilloscope-software-users-guide.pdf
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Re: Math Channel Filters , filter characteristics??

Postby n3mmr » Thu Mar 10, 2016 7:53 pm

I wanted to know more precisely! I'd like to know the steepness, max attenuation, ripple, and phase characteristics.
I suppose they're FIR filters, finite number of taps seems to say precisely that.

How many taps? What tap delays???
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Re: Math Channel Filters , filter characteristics??

Postby AndrewA » Fri Mar 11, 2016 3:24 pm

Hi,

All the Filters are FIR and use a 'Hamming window' in the filter design.
They are limited to 32,000 taps (this defines the minimum lowpass frequency in the channel options).

This page explains FIR filter design-
http://www.labbookpages.co.uk/audio/firWindowing.html
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