138 Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide
10 Triggers
3 Select the trigger Source:
• Analog channel, 1 to the number of channels
• External — triggers on the AUX TRIG IN signal.
• Line — triggers at the 50% level of the rising or falling edge of the AC power
source signal.
• WaveGen — triggers at the 50% level of the rising edge of the waveform
generator output signal. (Not available when the DC, Noise, or Cardiac
waveforms are selected.)
• WaveGen Mod (FM) — when waveform generator FM modulation is used,
triggers at the 50% level of the rising edge of the modulating signal.
• Digital channel (on mixed-signal oscilloscopes), D0 to the number of digital
channels minus one.
You can choose a channel that is turned off (not displayed) as the source for the
edge trigger.
The selected trigger source is indicated in the upper-right corner of the display
next to the slope symbol:
• 1 through 4 = analog channels.
• D0 through Dn = digital channels.
• E = External trigger input.
• L = Line trigger.
• W = Waveform generator.
4 In the Slope drop-down list, select:
• Rising edge.
• Falling edge.
• Alternating edges — Useful when you want to trigger on both edges of a
clock (for example, DDR signals).
• Either edge — Useful when you want to trigger on any activity of a selected
source.
Rising and Falling edge modes operate up to the bandwidth of the
oscilloscope. Other modes operate up to the bandwidth of the oscilloscope or
1 GHz, whichever is smaller.
The selected slope is displayed in the trigger badge.
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