Advantech PC-LabCard PCI-1784 Manual de usuario Pagina 60

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D.5 Mode E waveform
Rate Generator with Level Gating
Mode E is identical to Mode D, except the counter will only count those
source edges that occur while the Gate input is active. This feature
allows the counting process to be enabled and disabled under hardware
control. A square wave rate generator may be obtained by specifying the
TC Toggled output mode.
SOURCE
COUNT
VALUE
TC OUTPUT
TC TOGGLED
OUTPUT
GATE
2 L-1 L-2 K+1 K-1 2 1 0 L
Mode E Waveforms
1 0 L K
55
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