Publication 1769-UM005A-EN-P
Module Data, Status, and Channel Configuration
4-17
Channel Cutoff Frequency
The channel cutoff frequency (-3 dB) is the point on the input channel
frequency response curve where frequency components of the input
signal are passed with 3 dB of attenuation. The following table shows
cutoff frequencies for the supported filters.
All frequency components at or below the cutoff frequency are passed by
the digital filter with less than 3 dB of attenuation. All frequency
components above the cutoff frequency are increasingly attenuated, as
shown in the graphs below for several of the input filter frequencies.
Table 4.8 Filter Frequency vs. Channel Cutoff Frequency
Filter Frequency
Channel Cutoff Frequency
10 Hz
2.62 Hz
50 Hz
13.1 Hz
60 Hz
15.7 Hz
250 Hz
65.5 Hz
500 Hz
131 Hz
1 kHz
262 Hz
NOTE
Channel cutoff frequency should not be confused with
channel update time. The cutoff frequency simply
determines how the digital filter attenuates frequency
components of the input signal. See Determining Module
Update Time on page 4-26.
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