Keysight DSOX1202A - Page 128

128 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
12 Trigger Mode/Coupling
The [External] key also displays the Ext Trig signal's digital waveform. If the
External Trigger menu is already open, pressing [External] turns the Ext Trig
waveform display off or on.
The Ext Trig signal's digital waveform is based on its threshold voltage level
setting.
The external trigger digital waveform view is not available when the XY time
mode is selected or when the Averaging or High Resolution acquisition
modes are selected. On EDUX1000-Series oscilloscopes, additionally, the
external waveform view is not available when the trigger source is not "Ext",
when the Roll time mode is selected, or when serial bus decode is enabled.
2 In the External Trigger menu, press the Units softkey to select
between:
• Volts — for a voltage probe.
• Amps — for a current probe.
Measurement results, channel sensitivity, and the trigger
level will reflect the measurement units you have selected.
3 Press the Probe softkey; then, turn the entry knob to specify
the probe attenuation.
The attenuation factor can be set from 0.1:1 to 1000:1 in a
1-2-5 sequence.
The probe attenuation factor must be set properly for
measurements to be made correctly.
4 Press the Threshold softkey; then, turn the Entry knob to set
the threshold voltage for the External Trigger input signal.
5 On DSOX1200-Series oscilloscopes, press the Range softkey; then, turn the
Entry knob to set the External Trigger input signal range. When using a 1:1
probe, the Ext Trig input signal range is either 1.6 V or 8 V.
On EDUX1000-Series oscilloscopes, when using a 1:1 probe, the Ext Trig input
signal range is fixed at 8 V (and there is no Range softkey).
The range is automatically recalculated when a different External Trigger probe
attenuation factor is chosen.
6 On 2-channel oscilloscopes, press the Position softkey; then, turn the Entry
knob to adjust the vertical position of the Ext Trig signal's digital waveform.