OWON HDS1021M - Manual (Page 43)

OWON HDS1021M Handheld DSO & DMM 8-Advanced Function of Oscilloscope
8.2.2 Make Open and Close Settings on Channel
Press F2 Channel key first, then select OFF to make a Close setting on channel.
Press F2 Channel key first, then select ON to make an Open setting on channel.
8.2.3 Adjusting the Probe Scale
It is necessary to adjust the probe attenuation scale factor correspondingly in the channel operation
menu in order to comply with the probe attenuation scale. If it is a 10:1 probe, the scale of the
input channel of the oscilloscope should be selected as 10X to avoid any error occurring in the
displayed scale factor information and tested data.
Press F3 Probe to jump to the relative probe.
Table: Probe attenuation factor and the corresponding menu setting
Probe attenuation factor Corresponding Menu Setting
1:1 1X
10:1 10X
100:1 100X
1000:1 1000X
8.2.4 Setting of Inverted Waveform
Inverted waveform: The displayed signal reverses 180 degrees relatively to the ground potential.
Press F4 Inverted to start Invert; again press F4 Inverted to close Invert.
8.3 Setting the Trigger System
The Trigger defines the time when the acquisition of data and display of waveform start. If it is set
correctly, the trigger can turn an unstable display into a significant waveform.
When starting the acquisition of data, the oscilloscope collects sufficient data to draw the
waveform at the left side of the triggering point. With waiting for the triggering condition, the
oscilloscope is gathering data continuously. After a trigger is detected, the oscilloscope gathers
enough data continuously to draw the waveform at the right side of the triggering point.
To make a trigger mode setting, do the following:
1. Press the MENU key and the function menu appears at the right of the screen.
2. Press the MENU ▲ or MENU ▼ key to select TRIG MODE and five items selectable are
displayed at the bottom of the screen.
3. Select and press one from F1 through F5 key to make a different setting.
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