Triggering
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
App
Index
6-9
IM 701310-01E
Explanation
You can set the trigger coupling, HF rejection, trigger hysteresis, and window comparator
on signals applied to input channels CH1 to CH4 and EXT.
Trigger Coupling
You can select the trigger coupling.
AC
Sets the trigger source to the signal that is obtained by removing the DC component
from the trigger source signal.
DC
Uses the trigger source signal directly.
Note
• The trigger coupling is fixed to DC when the trigger source is EXT.
• When using the TV trigger, this setting is fixed to TV.
When using the TV trigger, this setting is fixed to TV.
When using the TV trigger, this setting is fixed to TV.
HF Rejection
Set the HF rejection to 15 kHz or 20 MHz if you are setting the trigger source to the
signal that is obtained by removing high frequency components (frequency components
greater than 15 kHz or 20 MHz) from the trigger source signal.
Note
• You cannot set HF rejection when the trigger source is EXT.
• When using the TV trigger, this setting is fixed to 300 kHz.
When using the TV trigger, this setting is fixed to 300 kHz.
When using the TV trigger, this setting is fixed to 300 kHz.
Hysteresis
Hysteresis specifies a voltage range above and below the trigger level to prevent the
DL9000 from triggering on minute voltage fluctuations.
Specifies a hysteresis of approximately 0.3 divisions around the trigger level.*
Specifies a hysteresis of approximately 1 division around the trigger level.*
* The values above are typical. They are not strictly warranted.
Window Comparator
Determines whether the trigger condition (which had been determined by the waveform’s
rising or falling edge or high or low condition), the Qualify condition, or the state condition
is inside or outside the window.
You can enable or disable the window comparator for each channel. A channel’s trigger
condition will change based on the window comparator setting.
For example, if you enable the window comparator on an edge-trigger source channel,
the DL9000 will be able to trigger based on whether or not the source channel waveform
enters the specified area.
Setting
Selectable Range
Resolution
Center
�4 divisions from the center of the screen
0.01 divisions
Width
�4 divisions above and below the center level
0.02 divisions
Note
Width can be set to a value that exceeds �4 div from the center of the screen. However, if the
top or bottom level goes off the screen, the operation will be unstable.
6.5 Setting the Trigger Coupling, HF Rejection, Trigger Hysteresis, and Window Comparator