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Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
12
Trigger Mode/Coupling
Often with single-shot acquisitions, you must initiate some action in the device
under test, and you don't want the oscilloscope to auto-trigger before that
happens. Before initiating the action in the circuit, wait for the trigger condition
indicator
Trig'd?
to flash (this tells you the pre-trigger buffer is filled).
See Also
•
•
•
"To position the time reference (left, center, right)"
To select the trigger coupling
1
Press the
[Trigger]
key.
2
In the Trigger menu, press the
Coupling
softkey; then, turn the Entry knob to
select:
•
DC
coupling — allows DC and AC signals into the trigger path.
•
AC
coupling — places a 10 Hz high-pass filter in the trigger path removing
any DC offset voltage from the trigger waveform.
The high-pass filter in the External Trigger input path is 50 Hz for all models.
Use AC coupling to get a stable edge trigger when your waveform has a
large DC offset.
•
LF
(low frequency)
Reject
coupling — adds a high-pass filter with the 3-dB
point at 50 kHz in series with the trigger waveform.
Pass
Band
50 kHz
0 dB
3 dB down point
DC
