Trigger auto re-arm on positive or negative edges
|The analogue trigger input is continuously sampled at the selected
sample rate. If the user programmed re-arm level is crossed by the trigger signal
from lower to higher values (rising edge) then the trigger engine is armed.
When the separately set trigger level is now crossed the card will start
recording or replaying data depending on functionality, (A/D digitiser or D/A waveform generator).
Further triggers are ignored until the record / replay period has completed,
then the trigger engine will accept a new re-arm ready for the next trigger.
This trigger mode can be combined with AND or OR logic from other sources,
e.g. a software trigger (such as key press), from the LVTTL trigger input
connector, or any analogue signal input channel (A/D digitiser cards only).
|Auto re-arm also works for higher to lower value (falling edge) situations,
where required. Choice of slope is simply made by the programmer in the
|Hint: The re-arm option is very useful in situations where noisy signal could
result in false triggers, i.e when the trigger recording / replay is desired
only after a major amplitude in a certain direction.
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Last modified by DataQuest Solutions Ltd 09.03.17