ETAS
Functional Description
ES441.1 - User Guide
43
Count Direction Control in acc. with the State of the Qualifying
Signal
In this counter mode, the ES441.1 is configured as an up-/down-counter with
the count direction being controlled in acc. with the state at the assigned qual
-
ifying channel (trigger channel). The counter can be positive or negative.
In the counter modes “Up/Down1” and “Up/Down2”, the counter is incremented
or decremented by comparing the state of the signal at the measurement chan
-
nel and at the qualifying channel:
• “Up/Down1”: The counter is incremented when the states differ and dec
-
remented when the states of the measurement channel and qualifying
channel are identical
• “Up/Down2”: The counter is incremented when the states are identical
and decremented when the states of the measurement channel and
qualifying channel differ
In the counter modes “Up/Down3” and “Up/Down4”, the counter is incremented
or decremented depending on the evaluation of the state of the signal at the
qualifying channel:
• “Up/Down3”: The counter is incremented when the qualifying channel is
active and decremented when it is inactive
• “Up/Down4”: The counter is incremented when the qualifying channel is
inactive and decremented when it is active
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 edge of the qualifying channel selected in
the calibration software or
• Counter in Free Running Mode (no resetting of the counter).
Fig. 5
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15
Counting the Inactive-Active Edges in “Up/Down1” Counter Mode
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