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22
Condition:
Press the condition button to select the trigger condition: “>”, ”<”, ”=”.
(1) >: Triggers when the slew rate of the trigger signal is greater than the set
slew rate.
(2) <: Triggers when the slew rate of the trigger signal is less than the set
slew rate.
(3) =: Triggers when the slew rate of the trigger signal is basically the same
as the set slew rate.
Time Setting:
Adjust the Multipurpose knob (shuttle knob or numeric keypad) to set the
time setting.
Threshold Value:
Press the threshold button to select the threshold value: low level, high level,
high and low level. You can also directly press the LEVEL knob in the trigger
control area to quickly switch between selections.
(1) Low level: The low level threshold can be adjusted by the LEVEL knob.
(2) High level: The high level threshold can be adjusted by the LEVEL knob.
(3) High and low level: The high and low level thresholds can be simultaneously
adjusted by the LEVEL knob.
Note: The formula for calculating the slew rate is
(High level threshold - Low level threshold) ÷ Time
For the set slew rate, the time here is the time setting value. For the slew
rate of the trigger signal, the time here refers to the time value between two
intersection points where the high level, low level intersect with the trigger
signal.
5.6 Runt Trigger
The runt trigger is used to trigger a pulse that has crossed one trigger level
but not the other. In this oscilloscope, the positive runt pulse is the pulse
that crosses the lower limit of the trigger level but does not cross the upper
limit of the trigger level; the negative runt pulse is the pulse that crosses the
upper limit of the trigger level but does not cross the lower limit of the trigger
level, as shown in the following figure.
Positive runt pulse
Negative runt pulse
High level of the trigger level
Low level of the trigger level
Press TRIG MENU type, and select runt by the Multipurpose knob. You
can also switch the trigger type by consecutively pressing the type key, then
press the Multipurpose knob to confirm.
At this time, the trigger setting information is displayed at
the upper right corner of the screen, the trigger type is runt, the trigger source is
CH1, and the low level of the trigger level is -760mV.
Runt Trigger Menu
Source:
Press the source button to select the trigger source, you can select CH1,
CH2, CH3, and CH4. The currently selected source is displayed at the upper
right corner of the screen.
Note: Only selecting the channel with connected signals as a trigger source
can obtain a steady trigger.
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