Spectrum-controls 1746sc-NI8u Manuale Utente Pagina 40

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28 SLC 500
Universal Analog Input Module
Figure 3.4 Signal attenuation with 60 Hz input filter
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
-200
0 60 120 180 240 300 360 Hz
-3 dB
15.7 Hz
Amplitude (in dB)
Signal Frequency
Figure 3.5 Signal attenuation with 250 Hz input filter
0
-20
-40
-60
-80
-100
-120
-140
-160
-180
-200
0 250 500 750 1000 1250 1500 Hz
-3 dB
65.5 Hz
Amplitude (in dB)
Signal Frequency
Channel Step Response
The channel filter frequency determines the channel’s step response.
The step response is time required for the analog input signal to reach
95% of its expected, final value given a full-scale step change in the
input signal. This means that if an input signal changes faster than
the channel step response, a portion of that signal will be attenuated
by the channel filter. Table 6 shows the step response for each filter
frequency.
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