2-14
IM 701310-01E
Trigger Position ►For the procedure, see section 6.2
After signal acquisition is started, the DL9000 triggers on the specified trigger condition
and displays the waveform of the acquired signal. When the trigger delay described
in the next item is set to 0 s, the trigger position coincides with the point at which the
trigger condition becomes true. By moving the trigger position on the screen, the display
ratio of the signal data (“pre-” data) before the trigger point which has been captured to
acquisition memory (the pre-trigger part), and data (“post-” data) after the trigger point (the
post-trigger part) can be changed.
Trigger Delay ►For the procedure, see section 6.3
The DL9000 normally displays the waveform before and after the trigger point. You can
set a trigger delay so that the DL9000 displays the waveform of the signal acquired the
specified time after the trigger or the specified number of edges after the trigger.
By time:
Set a delay time after the trigger occurs. The delay is from 0 to 10 s.
First Edge after time: After the set time has elapse from the trigger occurring, delay until
the specified edge is detected. The set time is from 0 to 10 s.
Edge Count:
After the trigger occurs, delay until the specified edge has been
detected a certain number of times.
Trigger Hold-off ►For the procedure, see section 6.4
The trigger hold-off function temporarily stops detection of the next trigger once a trigger
has been activated. This function is useful when observing a pulse train signal, such as
a PCM code or when using the history memory function described later (see page 2-20)
and you want to change the signal acquisition period.
Trigger Coupling ►For the procedure, see section 6.5
As with the input signal to be measured, you can change the input coupling for the trigger
source. Select the input coupling that is suitable for the trigger source signal.
The following two types of input coupling are available for the trigger source signal.
DC
Select this setting when using the source as is with no processing of the signal.
AC
Select this setting when using the signal with the DC components removed for the trigger
source.
HF Rejection ►For the procedure, see section 6.5
Turn HF rejection ON to eliminate high frequency components above 15 kHz or 20 MHz
from the trigger source. This prevents triggers from being activated at unexpected points
due to the effect of high frequency noise.
2.4 Triggers
