7-7
IM 253710-01E
Setting the Trigger
7
Explanation
Selecting the trigger type
Select the trigger type from the following choices. Here, select [Edge].
• Edge : Sets the trigger type to edge trigger. A trigger occurs when the trigger
source rises above or falls below a preset trigger level.
• Window : Sets the trigger type to window trigger. A certain window (width) is set
and a trigger occurs when the trigger source level enters this window (IN) or exits
from this window (OUT). For window trigger, see section, 7.4 “Setting the Window
Trigger.”
Selecting the trigger slope
Slope refers to the movement of the signal such as the movement from a low level to
a high level (rising) or the movement from a high level to a low level (falling). When
the slope is used as one of the trigger conditions, it is called a trigger slope. Select
the trigger slope from the following choices.
•
: The trigger occurs when the trigger source signal rises above the trigger level
from a lower level.
•
: The trigger occurs when the trigger source signal falls below the trigger level
from a higher level.
•
: The trigger occurs on both the rising and falling cases.
Setting the trigger level
Trigger level refers to the level that is used to judge the passing level of the trigger
slope or the condition of the trigger source. When the trigger type is set to [Edge],
you specify the passing level of the trigger slope with the trigger level.
Set the level in the range from 0.0 to
±
100.0%.
Half of the total vertical span of the waveform display screen is considered to be
100%. With the center of the vertical axis taken to be the zero amplitude line, the
upper and lower limits of the screen are 100% and –100%, respectively.
The upper and lower limits of the display screen correspond to the measurement
range (if scaled, the range after scaling) of the voltage/current that is set for each
channel.
Zero input line
(The center of the
vertical axis)
100% (300 Vpk)
–100% (–300 Vpk)
• Measurement range : 300 Vpk
• Trigger level : 25%
Trigger level 25% (75 V)
Trigger position (Trigger point)
Note
•
The trigger level setting is void when the trigger mode is [OFF], [HF Auto], or [HF Normal]. It
is also void when the trigger mode is [AT-Level] and the trigger does not occur within the
timeout period.
•
The trigger level setting is void when the trigger source is set to [Ext].
•
When the trigger mode is [HF Auto] or [HF Normal], the trigger level cannot be set.
7.3 Setting the Edge Trigger