ETAS
Functional Description
ES441.1 - User Guide
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In this mode, the ES441.1 can count edges with the following additional mea
-
surement modes:
• Up-counter with measurement control (triggering) in acc. with
– the state of the qualifying signal,
– the edges of the qualifying signal and
• up-/down-counter with control of the counting direction in acc. with the
state of the qualifying signal.
The following counter operating modes can be selected in the calibration soft
-
ware for measurement modes with a qualifying signal:
• Resetting the counter after every sampling point or
• Resetting the counter with the edge of the qualifying channel selected in
the calibration software or
• Counter in Free Running Mode. The counter counts from the start of
measuring without being reset during measuring. If the count scope
(overflow) is reached and the measurement is not yet completed, the
counter starts to count from the beginning again. The counter overflows
after 2
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signal transitions to be counted.
The following figures show examples of the “Standard with qualifying signal”
counter mode.
Counting with Resetting in acc. with the Qualifying Signal
In this counter mode, the ES441.1 is configured as an up-counter with the
counter being reset by the signal at the qualifying channel (trigger channel).
In this mode, the ES441.1 can count edges with the following measurement
modes in accordance with the configuration in the calibration software:
• Counting the edges when the input signal changes from inactive to
active state
• Counting the edges when the input signal changes from active to inac
-
tive state
• Counting the edges when the input signal changes from inactive to
active state and from active to inactive state and
• Counting the cycles
In the calibration software, the type of counter resetting can be selected for this
counter mode:
• Resetting the counter after every sampling point or
• Resetting the counter with the inactive-active edge of the signal at the
qualifying channel or resetting the counter with the active-inactive edge
of the signal at the qualifying channel.
NOTE
During the measure phase determined by the qualifying signal, continually
updated counting results are available.
