LabSmith LC880, Руководство пользователя

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Unlike an analog filter which “smears” the signal edge, this noise suppression function digitally blocks false triggers,
retaining the sharp edges on the real trigger signal.
As with Delayed Pulse After Trigger mode, you have additional controls over the channel.
On the Validate tab, choose:
Minimum duration The minimum length of an input pulse that will trigger the channel
Duration of pulse The duration of the output signal
Until Reset The output will remain high after a valid trigger, until the channel is reset
Inverted Output Check the box to set the output high until a valid trigger.
On the Triggering tab choose:
Normal The channel can retrigger an unlimited number of times
Skip N triggers The channel triggers only after the specified number of valid input pulses (between 0 and
2,147,483,647).
Retrigger N times Limits the number of retriggers allowed between resets (between 0 and 2,147,483,647).
To allow a channel to be triggered again after reaching the limit, press the “Reset” button
on the LC880 or choose Program>Reset Channels in Trigger.
Trigger on input high Allows the channel to be repeatedly triggered while an input is high.
Trigger on rising input Sets the channel to be edge triggered (i.e., an input signal that stays high will only trigger
the channel once) .
The front panel LED for the noise suppression channel will glow green until an input signal is detected. It will then
glow red until the duration period has elapsed. At this point, the LED will respond as follows:
Retriggering
enabled? Edge
trigger? LED
no yes or no remains red (no more triggers accepted)
yes no glows green (waiting for next trigger)
yes yes is off; glows green when trigger goes low
To try validated trigger mode:
1. On the General Settings screen, select 100/64 (low-resolution) mode for Channels A and B.
2. In Channel A’s properties, select “Validated Trigger Input” mode.
3. On the Validate tab, enter a “Minimum duration” and “Duration of output pulse” of 1 second each.
4. On the Triggering tab, select “Retrigger N times,” and set N=50. Click “Apply” to save the settings.
5. Now, depress the trigger button. If you hold the button down for more than one second (the minimum
duration), the output of Channel A will go high. If you release the button before one second elapses, the
output will remain low, and the channel will wait for another input pulse.