Runt Trigger - UNI-T UPO2102 User Manual

User's Manual

7.6 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 Figure 7-4..
The runt trigger menu can set source, trigger coupling, trigger mode, polarity (positive, negative pulse), runt
condition (irrelevance, <, >,≤≥), the lower/upper limit of time, trigger level setting, etc.
(1) Trigger Polarity
a. Positive pulse: Set to trigger on the positive runt pulse.
b. Negative pulse: Set to trigger on the negative runt pulse.
(2) Condition
Trigger condition：Irrelevance, >, <, ≤≥.
a. Irrelevance：Does not set the runt pulse trigger condition.
b. >：It will be generated when the runt pulse width is greater than the setting pulse width, it can set
the lower limit of time.
c. <：It will be generated when the runt pulse width is less than the setting pulse width, it can set the
upper limit of time.
d. ≤≥：It will be generated when the runt pulse width is in the scope of the setting pulse width or
within a range, it can set the lower/upper limit of time.
(3) The lower/upper limit of time
a. Compare the setting pulse width value with pulse width of channel. It will generated when trigger
condition is met, range can be set to 8ns ~ 10s.
 Instruments.uni-trend.com
Positive runt amplitude
Negative runt amplitude
Figure 7-4
Trigger level-high level
Trigger level-low level
MSO/UPO2000 Seri es
42 / 137