4-5
IM DLM3054-01EN
Trigger Level (Level)
Trigger level
refers to the signal level used as a reference for detecting a signal’s rising and falling edges or high
and low states. With simple triggers such as the edge trigger, the instrument triggers when the trigger source
level passes through the specified trigger level.
The analog signals (CH1 to CH4) and the logic signal (LOGIC) have different selectable trigger level ranges.
Analog Signals
Selectable range: 8 divisions within the screen
Resolution: 0.01 divisions (for example: 0.02 mV when the time scale is set to 2 mV/division)
Logic Signals (On models with the logic signal input port)
The selectable range varies depending on the logic probe that you use.
• Model 701988: ±40 V (0.05 V resolution)
• Model 701989: ±6 V (0.05 V resolution)
• The trigger level is set using the jog shuttle. If a single trigger source is used (Edge, Pulse Width, Rise/Fall
Time, Runt, Timeout, Window, Interval, FlexRay, CAN, CAN FD, LIN, CXPI, SENT, UART, TV), you can
also use the front-panel LEVEL knob to set the trigger level.
• When the front-panel LEVEL knob is valid, you can press it to automatically set the trigger level.
• If the jog shuttle is controlling the trigger level, you can press the RESET key to reset the trigger level to
the current offset voltage.
• The trigger level is shared between trigger A and trigger B. If the trigger type of one of the triggers has two
levels (upper level and lower level) and that of the other has one level, the center value of the two levels
and the single level are shared.
• The selectable range of threshold levels used to detect logic signal bit states is the same as the selectable
range of the
trigger level. How you can set the bit levels varies depending on the logic probe that
you are using.
Model 701988: The level setting applies to all bits.
Model 701989: The level is set for each bit separately.
• You can also set the level of each bit of the logic signal using Level on the bit setup menu of the LOGIC
key (the level is shared). If you change the level on the trigger menu, the Level value on the bit setup menu
of the LOGIC key will also change.
Trigger Slope (Slope/ Polarity)
Slope
refers to the movement of the signal from a low level to a high level (rising edge) or from a high level to a
low level (falling edge). When a slope is used as one of the trigger conditions, it is called a
trigger slope
.
The following trigger slope settings are available for triggering the instrument.
When the trigger source changes from a level below the trigger level to a
level above the trigger level (rising)
(Slope)
When the trigger source changes from a level above the trigger level to a
level below the trigger level (falling)
(Slope)
When a rising or falling edge is detected
(Slope)
When the trigger source level enters the specified voltage range
(Polarity)
When the trigger source level goes outside of the specified voltage range
(Polarity)
* /
is only selectable when the trigger source is an analog signal.
4 Triggering