User Manual

61
 > (greater than a time value): trigger when the positive or negative pulse time of the
input signal is greater than the specified time value.
 [--,--] (within a range of time value): trigger when the positive or negative pulse time of
the input signal is greater than the specified lower limit of time and less than the specified
upper limit of time value.
 --][-- (outside a range of time value): trigger when the positive or negative pulse time of
the input signal is greater than the specified upper limit of time and less than the
specified lower limit of time value.
5. Press the Time Setting softkey (<, >, [--,--], --][--), turn the Universal Knob to select the
desired value.
Figure 59 - Interval trigger
DropOut Trigger
There are two types of DropOut triggers: edge and state. The oscilloscope will trigger when a
signal edge disappears for longer than a specified time. For example, if you had the oscilloscope
monitoring a digital system's clock, you could set the Time value to slightly longer than the clock
period. The oscilloscope would then trigger on a missing clock pulse.
Edge
Trigger when the time interval (△T) from when the rising edge (or falling edge) of the input signal
passes through the trigger level to when the next rising edge (or falling edge) passes through the
trigger level is greater than the timeout time set, as shown in the figure below.