Hioki MR8827, Instruction Manual

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193
Analog Signal Triggers
5. Glitch Trigger ( Only)
Triggering occurs when the input signal crosses the trigger level (threshold voltage) if its pulse width is
shorter than the specified width.
Glitch Width
Trigger Level
Input Waveform
Trigger Slope: [↑]
T
Type Parameters
[Glit.]
[L] (Level) Sets the level (voltage value) for the trigger.
(The setting can be made in 1/50 increments.)
[S] (Slope) Determines whether triggering occurs when the signal crosses the threshold
(trigger level) on the rising or falling edge. (↑, ↓)
[Event] The number of signal rising or falling edge events is counted and triggering occurs
when the Event number set here is exceeded. (1 to 4000)
[Width] Sets the pulse width (time) that is used to determine a glitch. Triggering occurs
when the width is lower than this value. (The available setting range depends
on the sampling frequency. Lower limit: sampling frequency × 2, upper limit:
sampling frequency × 4000)
When Using Noisy Signals for Triggering
Method 1: Enable the trigger filter
By setting the filter width to prevent triggering on noise, triggering occurs only when the trigger criteria
continue to be met for at least the specified width (interval).
Trigger Level
Noise does not cause triggering.
T
Trigger Point
Filter Width
Method 2: Setting an Event Count
If triggering occurs too frequently, an event count can be specified so that a trigger is accepted only
after the specified number of trigger events has occurred.
2.5 V
5 V
0 V
Trigger Level
T
1 2 3 4
Example: When the event count is set to [4] (Slope:
↑
)
Event Count
To Suppress the Effects of Noise
Noise near the trigger level can erroneously increment the event count. Use the trigger filter to avoid this
problem.
2.5 V
5 V
0 V
Trigger Level
T
1 2 3 4
Event Count
x
Filter Width
9
Trigger Settings