MR8740T_user_manual_eng_20191016H.pdf - 第120页
11 5 T riggering the Instrument With Logic Signals (Logic T rigger) 3 Click each of the signals under [T rigger pattern] to set a logic-trigger pattern. The logic-trigger pattern can be set. X Ignores a signal. 0 The l…
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Triggering the Instrument With Logic Signals (Logic Trigger)
5.7 Triggering the Instrument With Logic Signals
(Logic Trigger)
This section explains how to congure the logic trigger settings.
• Input signals acquired across the logic channels serve as a trigger source.
• You can set a trigger pattern and trigger logical-condition by choosing between logical AND and
OR operations. When the logic-trigger conditions are satised, a logic trigger is generated.
• With the trigger lter setting, no logic triggers are generated until the logic-trigger condition is
continuously satised during the specied lter width or more.
> [Trigger] > [Source]
2
3
1
1
Click the [Condition satised] box, and then choose a logic-trigger satisfaction condition
from the list.
Off
Disables the logic trigger.
OR The logic-trigger condition is satised when any one of logic input signals matches the
trigger pattern.
AND The logic-trigger condition is satised when all logic input signals match the trigger
pattern.
2
Click the [Filter] box, and then choose a sampling count of the lter from the list.
Only after the level-trigger condition is continuously satised during the specied period, an analog trigger is
generated.
Conguring the trigger lter setting prevents a logic trigger from being unintentionally generated due to noise.
(p. 107)
Off
Disables the trigger lter.
10 to 10000 Enables the trigger lter.
Allows you to enter a lter width in the number of samples.
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Triggering the Instrument With Logic Signals (Logic Trigger)
3
Click each of the signals under [Trigger pattern] to set a logic-trigger pattern.
The logic-trigger pattern can be set.
X
Ignores a signal.
0 The logic-trigger condition of each logic signal is satised when the signal is at a low
level.
1 The logic-trigger condition of each logic signal is satised when the signal is at a high
level.
Setting example
The logic-trigger conditions differ depending on the combination of the [Condition satised]
setting (logical OR or AND operation) and the [Trigger pattern] setting as follows:
Lx1 [1]
Lx2 [0]
Lx3 [X]
Lx4 [X]
Lx1 [1]
Lx2 [0]
Lx3 [X]
Lx4 [X]
OR
AND
Trigger pattern
Trigger pattern
Not satised Satised
Not satised Satised
Logic-trigger condition
Logic-trigger condition
5
Conguring the Trigger Settings
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Triggering the Instrument at Regular Intervals (Interval Trigger)
5.8 Triggering the Instrument at Regular Intervals
(Interval Trigger)
Start triggers can be activated at specied intervals. Setting the recording mode to [Repeat] allows
the instrument to record waveforms at regular intervals.
• When using the pre-trigger, the instrument starts monitoring interval-trigger times after the rst
pre-trigger time elapses since the start of measurement.
• No start triggers are activated by any interval triggers while the instrument is lling the pre-trigger
memory. An interval trigger triggers the instrument while the instrument is waiting for a trigger
after the instrument has lled the pre-trigger memory.
• Since the clock is internally corrected, displayed trigger times may not synchronize with the
intervals of the interval trigger.
> [Trigger] > [Common]
2
3
1
1
Click [Interval trigger].
The interval trigger setting dialog box will appear.
2
Click [Interval trigger] to set it to [On].
3
Click the [h], [min], and [s] boxes, and then enter a period of time for interval triggers.
An internal trigger is generated at the start of measurement, and triggers are repeatedly generated at the
specied intervals.