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Spectrum Controls 1756sc-OF8H Series A User Manual

Page 57

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Chapter 5: 1756sc-IF8H Channel Configuration, Data, and Status

43

TA = User specified digital filter time constant (Seconds)

Xn = Current value, unfiltered peak voltage (PV)

Using a step input change to illustrate the filter response, as shown below,
you can see that when the digital filter time constant elapses, 63.2% of the
total response is reached, each additional time constant achieves 63.2% of
the remaining response.

0.5

63%

Amplitude

(Not to scale)

Time

Unfiltered
TA = 0.01 Sec
TA = 0.50 Sec
TA = 0.99 Sec

0.0

0.01

0.99

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