Trigger
57
9.2.3
Pulse Trigger
The
Pulse Trigger
type triggers on the positive or negative pulse with a specified width.
Figure 9.9
Pulse Trigger
To select
Pulse Trigger
type:
1.
Press the Setup key or use the touchscreen controls to enter the
Trigger Menu
.
2.
Use the touchscreen to select
Type
.
3.
will appear.
–
Use the touchscreen to
Pulse
.
4.
Use the touchscreen to toggle the
Polarity
between
Positive
and
negative
.
condition.
5.
Use the touchscreen to select the
Limit Range
.
•
<= (less than a time value)
: Trigger when the positive or negative pulse time of the input signal is lower than
the specified time value. For example, for a positive pulse, if you set t (pulse real width) 100ns, the waveform
will trigger.
Figure 9.10
Less than a Time Value
•
>= (greater than a time value)
: Trigger when the measured pulse width is less than the specified time. For
example, for a positive pulse, if you set the pulse width < 100 ns, the oscilloscope will trigger on the following
waveform:
Figure 9.11
Greater than a Time Value
•
[- -.- -] (within a range of time value)
: Trigger when the pulse width is between the lower and upper specified
times. For example, for a positive pulse, if you set the pulse width) between 100 ns and 300 ns, the oscilloscope
will trigger on the following waveform
