Fluke 199C/S FE 192,196,199 C Users Manual - Page 66
Triggering on External Waveforms, External Triggering, Ext LEVEL
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Fluke 192B - 196B/C - 199B/C Users Manual Triggering on External Waveforms Use external triggering when you want to display waveforms on inputs A and B while triggering on a third signal. You can choose external triggering with automatic triggering or with edge triggering. 1 Supply a signal to the red and black 4-mm banana jack inputs. See Figure 31. In this example you continue from the Trigger on Edges example. To choose the external signal as trigger source, continue as follows: 2 Display the TRIGGER (On Edges) key labels. 3 Select Ext (external) edge trigger. Observe that the key labels at the bottom of the screen have been adapted to allow selection of two different external trigger levels: 0.12 V and 1.2 V: Figure 31. External Triggering 4 Select 1.2V under the Ext LEVEL label. From this point the trigger level is fixed and is compatible with logic signals. 58