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IM DLM3054-01EN
HF Rejection (HF Rejection)
Use HF rejection when you want to remove the high-frequency components (above approximately 15 kHz or 20
MHz) from the trigger signal. You can select from one of the settings below. You cannot use HF rejection when
the trigger source is set to LOGIC, EXT, or LINE.
OFF, 15kHz, 20MHz
Noise Rejection (Noise Rejection)
Noise rejection establishes a trigger level margin (hysteresis) so that the instrument does not trigger if the signal
level change is within the margin.
Select the hysteresis from one of the following settings below. You cannot use noise rejection when the trigger
source is set to EXT or LINE.
Approximately 0.3 divisions* of hysteresis around the trigger level
Approximately 0.5 divisions* of hysteresis around the trigger level
Approximately 1 divisions* of hysteresis around the trigger level
* The above values are approximate values. They are not strictly warranted.
When the trigger source is LOGIC, you can apply hysteresis to the threshold level so that the high and low states
do not change as long as the signal level changes within that range.
If the 701989 logic probe is connected, select the hysteresis from one of the following settings below.
Hysteresis of approximately 100 mV around the threshold level*
Hysteresis of approximately 250 mV around the threshold level*
* The above values are approximate values. They are not strictly warranted.
The hysteresis is fixed at approximately 80 mV for the 701988 logic probe, so the setup menu will not appear.
Probe Attenuation (Probe)
When you set the trigger source to EXT, set the probe attenuation (1:1 or 10:1).
Input Range (Range)
When the trigger source is set to EXT, select the input range.
Select selectable ranges vary depending on the probe attenuation setting.
• 1:1: ±2 V or ±20 V
• 10:1: ±20 V or ±200 V
Trigger Position (POSITION knob)
When you move the trigger position, the ratio of the displayed data before the trigger point (the pre-trigger
section) to the data after the trigger point (the post-trigger point) changes.
When the trigger delay is 0 s, the trigger point and trigger positions coincide.
Display record length
Trigger position
Pre-trigger section Post-trigger section
0%
100%
T
Selectable range: 0 to 100% of the display record length
Resolution: 1%
4 Triggering