Iwatsu DS-8814, Operation Manual

Page: 39 / 141

20
Changes the sweep mode from AUTO
→
NORMAL
→
SINGLE.
(The same operation can also be set by Sweep in the TRIG menu.)
The selection conditions of [Auto] [Norm] [Sngl] are displayed at
the bottom of the screen.
Sweep mode
AUTO
(automatic
sweep)
NORMAL
(normal sweep)
SGL
(single)
When the input signal does not cross the trigger level while the sweep mode
has been set to NORMAL or SINGLE, no new waveform is acquired. Selecting
Auto automatically acquires new waveforms when no trigger signal is
generated.
Difference between sweep modes Auto and Norm
Sweep mode
in
roll function
Free run sweep starts when no trigger signal is available. When the
trigger signal frequency is low, triggering may be unstable. In this
case, change to NORM.
Captures a waveform every time a trigger signal is generated.
Sweep stops when no trigger signal is available. This ensures the
stable observation of the signals with a frequency of 25 Hz or less.
When a trigger signal is generated, captures a waveform only once.
To capture the waveform again, press the RUN/STOP button to
enable the waveform to be captured.
While roll mode is set, the sweep mode is set as follows:
Endless: Continues to capture and display a waveform until the
STOP key is pressed.
Trigger’d: When a trigger is generated, stops capturing a
waveform. (
See Section 2, for details. )
AUTO/
NORM/SGL
Trigger level
The conditions of Auto, Normal, Single are
displayed at the bottom of the screen.