175
Keysight InfiniiVision 3000 X-Series Oscilloscopes
User's Guide
11 Trigger Mode/Coupling
To select the Auto or Normal trigger mode / 176
To select the trigger coupling / 177
To enable or disable trigger noise rejection / 179
To enable or disable trigger HF Reject / 179
To set the trigger holdoff / 180
External Trigger Input / 180
To access the Trigger Mode and Coupling Menu:
• In the Trigger section of the front panel, press the [Mode/Coupling] key.
Noisy Signals If the signal you are probing is noisy, you can set up the oscilloscope to reduce the
noise in the trigger path and on the displayed waveform. First, stabilize the
displayed waveform by removing the noise from the trigger path. Second, reduce
the noise on the displayed waveform.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Remove the noise from the trigger path by turning on high-frequency rejection
("To enable or disable trigger HF Reject" on page 179), low-frequency
rejection ("To select the trigger coupling" on page 177), or "To enable or
disable trigger noise rejection" on page 179.
3 Use "Averaging Acquisition Mode" on page 193 to reduce noise on the
displayed waveform.
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