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9330 Operating Manual
Interface Inc.
● 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA ● Phone 480.948.5555 ● Fax 480.948.1924
www.interfaceforce.com
● Email:
contact@interfaceforce.com
●
800.947.5598
Document Number 15-216 Rev B
Page 47 of 74
4.1.5.
Filter Order
A.
Settable for FIR Filter only
B.
Higher order leads to steeper damping characteristics, but slower step response.
C.
Lower cut-off frequency is possible with higher order, higher cut-off with lower order.
F
IGURE
42
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F
ILTER
O
RDER
4.1.6.
Frequency response
A.
Calculate filter and show results in frequency domain of sine waves at the input of
different frequencies if successful.
B.
Especially with IIR High pass. Band pass and Band stop, observe the graph carefully for
instability: A stable freq. response of an IIR filter is generally continuous and should
never exceed 0dB.
F
IGURE
43
-
F
REQUENCY RESPONSE
4.1.7.
Step response
A.
Show filter output signal in time domain of standard step from 0 to nominal value at the
input at time=0.
B.
Useful for determining settling time, e.g. for high-order FIR filter.
F
IGURE
44
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S
TEP RESPONSE