Hantek 6022BE    
on the rising or the falling edge of a signal. Select Edge trigger mode to 
trigger on Rising edge or Falling edge.
Mode: Select the trigger mode.
 
The oscilloscope only provides
 
edge trigger mode.
Sweep: Set the sweep mode to Auto, Normal or Single.
 
Auto: Acquire waveform even no trigger occurred
Normal: Acquire waveform when trigger occurred.
Single: Acquire waveform when trigger occurred then stop
Source: You can use the trigger source options to select the signal that the 
oscilloscope uses as a trigger. The source can be any signal 
connected to a channel BNC, or to the EXT. BNC.
CH1: Select CH1 as trigger signal
CH2: Select CH2 as trigger signal
Slope: Set the slope to Rising (+) or Falling (-).
Rising: Trigger on rising edge
Falling: Trigger on falling edge
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The User’s Manual