Note
1. Use trigger holdoff to help stabilize the display of aperiodic waveforms.
Note
1. Press the SINGLE button when you want the oscilloscope to acquire a single waveform.
2. Trigger coupling affects only the signal passed to the trigger system. It does not affect
the bandwidth or coupling of the signal displayed on the screen.
3. Normal Polarity Sync triggers always occur on negative-going horizontal sync pulses.
If the video waveform has positive-going horizontal sync pulses, use the Inverted
Polarity selection.
2.8.6 Trigger Holdoff
You can use the Trigger Holdoff function to produce a stable display of complex
waveforms. Holdoff is time between when the oscilloscope detects one trigger and
when it is ready to detect another. The oscilloscope will not trigger during the
holdoff time. For a pulse train, you can adjust the holdoff time so the oscilloscope
triggers only on the first pulse in the train.
If you want to change holdoff time, please follow next operations:
●
Press
the TRIG MENU button to show the TRIG Menu.
●
Press
the Type option button to select trigger type.
●
Press
the Set up option button to enter the Trigger setup menu.
●
Press
the Holdoff option button，turn the Universal knob to change the holdoff
time until the waveform trigger steadily.
Trigger
position
Holdoff time
Trigger level
2.8.5 Slope & Level
The Slope and Level controls help to define the trigger. The Slope option (Edge
trigger type only) determines whether the oscilloscope finds the trigger point on
the rising or the falling edge of a signal.
The TRIGGER LEVEL knob controls where on the edge the trigger point occurs.
{
Rising edge
Trigger level
can be adjusted
vertically
Falling edge
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Digital
S
torage
O
scilloscope
Digital Storage Oscilloscope
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