The “Trigger” mode allows you to activate the detection of an edge if necessary to initiate the oscilloscope sweep (TRIG ON-TRIG OFF).
adjustment mode
The +/- trigger adjustment mode allows you to establish the signal level that will initiate the oscilloscope sweep, visible by a small cursor on the left of the screen. The position of this cursor corresponds to the level to be reached to initiate the scan, it is adjustable over the entire amplitude of the signal, plus or minus (+/-).
scanning speed
It is possible to change the scanning speed by pressing the “SWP” key and using the +/- keys to adjust the time base of the device.
"Gain" mode
The “Gain” mode allows you to adjust the gain or sensitivity of the device, with the same divisions as the voltmeter.