User Manual

Chapter 4: Module Data, Status, and Configuration
U ser 's M a n u a l 0 300 21 5- 03 R ev. A
6-9
Table 6-5 (Filter Frequency and Step Respo nse)
Filter Frequency
Step Response
1
28 .5 Hz
10 8 ms
50 Hz 62 ms
60 Hz
52 ms
300 H z
12 ms
360 H z
10 ms
1
T he c hannel update tim e i s equal to the c hannel step respos e.
Channel Cut-Off Frequency
The filter cut-off frequency, -3 dB, is the point on the frequency response curve where
frequency components of the input signal are passed with 3 dB of attenuation. The
following table shows cut-off frequencies for the supported filters.
Table 6-6 ( Filter Frequency versus Channel Cut-off F requency)
Fil ter Frequency
Cut-off Freque ncy
Rejec tion
28 .5 Hz
2.3 H z 67 db @ 50 /60 H z
50 H z 4.0 H z 96 db @ 50 H z
60 H z 4.7 H z 96 db @ 60 H z
300 H z
24 Hz
25 db @ 5 0 Hz
360 H z 28 Hz 25 db @ 60 H z
All input frequency components at or below the cut-off frequency are passed by the
digital filter with less than 3 dB of attenuation. All frequency components above the cut-
off frequency are increasingly attenuated as shown in Figure 6-2 (Frequency Response).