50 Keysight InfiniiVision 1000 X-Series Oscilloscopes User's Guide
2 Quick Reference
2 Remove the noise from the trigger path by turning on high-frequency rejection,
low-frequency rejection, or noise reject.
3 Use “Selecting the Acquisition Mode" on page 52 to reduce noise on the
displayed waveform.
Table 14 Trigger Mode, Coupling, Reject, Holdoff Features
Feature Front Panel Key/Softkey Location (see built-in help for more information)
Trigger mode [Trigger] > Mode
You can also configure the [Quick Action] key to toggle between the Auto and Normal trigger modes.
See “Configuring the [Quick Action] Key" on page 85.
Auto trigger mode [Trigger] > Mode, Auto
If the specified trigger conditions are not found, triggers are forced and acquisitions are made so that
signal activity is displayed on the oscilloscope. The Auto trigger mode is appropriate when:
• Checking DC signals or signals with unknown levels or activity.
• When trigger conditions occur often enough that forced triggers are unnecessary.
Normal trigger mode [Trigger] > Mode, Normal
Triggers and acquisitions only occur when the specified trigger conditions are found. The Normal
trigger mode is appropriate when:
• You only want to acquire specific events specified by the trigger settings.
• Making single-shot acquisitions with the [Single] key.
Often with single-shot acquisitions, you must initiate some action in the device under test, and
you do not 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).
Force trigger [Force]
When in the Normal trigger mode and no triggers are occurring, you can force a trigger to acquire
and display waveforms (which may show why triggers are not occurring).
Trigger coupling [Trigger] > Coupling (DC, AC, LF Reject, TV/Video)
NOTE: Trigger coupling is independent of channel coupling (see “Vertical Controls" on page 34).
Trigger noise reject [Trigger] > Noise Rej
Trigger high frequency
reject
[Trigger] > HF Reject
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