MR8740T_user_manual_eng_20191016H.pdf - 第111页
106 T riggering the Instrument Using Analog Signals (Analog T rigger) 5.6 T riggering the Instrument Using Analog Signals (Analog T rigger) This section explains how to congure the analog trigger settings and types of t…
105
Setting the Trigger Satisfaction Conditions (AND/OR Operation) Among Trigger Sources
5.5 Setting the Trigger Satisfaction Conditions
(AND/OR Operation) Among Trigger Sources
Set the trigger logical-conditions among the analog, logic, external, and interval triggers by
choosing between logical AND or OR operation.
The forcible trigger triggers the instrument regardless of the trigger logical-conditions setting. If all
trigger sources are set to off (i.e., with no trigger setting), recording starts immediately (free run).
> [Trigger] > [Common]
Click [AND] or [OR], whichever is displayed, to switch to the other.
OR
When any one of the specied trigger conditions changes from not being satised to
being satised (at a changing point), the instrument is triggered. Thus, even though
a trigger condition has been already satised at the start of waiting for a trigger, the
instrument is not triggered until a changing point is detected.
AND Only when all of the specied trigger conditions are satised, the instrument is
triggered. Thus, if all the specied trigger conditions have been already satised at the
start of waiting for a trigger, the instrument is immediately triggered.
Setting example: To trigger the instrument when a waveform crosses the zero-volt level in
the positive direction ([ ]*)
The instrument is triggered based on whether the trigger satisfaction condition is set to AND or OR
operation in the following ways:
Channel Trigger Level at time Slope Filter
CH1, CH2 Level 0.00 V
* Off
[AND] [OR]
One waveform is above 0 V,
and the other is also above 0 V.
Either waveform crosses 0 V
upwards.
Start Start
*: With the [AND] setting, the slope setting item appears as [HIGH].
5
Conguring the Trigger Settings
106
Triggering the Instrument Using Analog Signals (Analog Trigger)
5.6 Triggering the Instrument Using Analog Signals
(Analog Trigger)
This section explains how to congure the analog trigger settings and types of the analog triggers.
> [Trigger] > [Source]
1
1
Click a trigger source you want to specify.
The setting dialog box appears.
3
4
2
2
Click the [Channel] box, and then from the list, choose a channel you want to set a trigger
condition for.
3
Click the [Type] box, and then choose a trigger type from the list.
Off
, Level, In, Out, Voltage drop, Period-in, Period-out, Glitch
4
Congure each trigger-type-specic setting.
107
Triggering the Instrument Using Analog Signals (Analog Trigger)
1. [Level] trigger
When an input signal crosses the specied level in the positive or negative direction, an analog
trigger is generated.
Level
Input waveform
Slope: [
] [ ]
Setting Description
Level –f.s. to +f.s.
Default: 0
Allows you to enter a level of the level trigger.
Slope With OR
The level-trigger condition is satised when a waveform crosses
the threshold value (level) in the positive direction.
The level-trigger condition is satised when a waveform crosses
the threshold value (level) in the negative direction.
With AND HIGH
The level-trigger condition is satised when a waveform is higher
than the threshold value (level).
LOW The level-trigger condition is satised when a waveform is lower
than the threshold value (level).
Event With OR 1
to 4,000 Allows you to enter the number of events.
The instrument counts the number of times the level-trigger
condition is satised. An analog trigger is generated when the
count reaches the specied number of events.
With AND Not available
Filter Off
, 10 to 10,000 Allows you to enter a lter width in the number of samples. Only
after the level-trigger condition is continuously satised during
the specied period, an analog trigger is generated. Specifying
this option prevents the instrument from being unintentionally
triggered due to noise.
With the [Filter] setting
Specifying the lter duration prevents the analog trigger from being unintentionally generated due
to noise, allowing it to be generated only after the level-trigger condition continues to be satised
during the specied duration (period) or longer.
Filter
Level at time
Noise does not generate any analog trigger.
5
Conguring the Trigger Settings