Snap-On Zeus, Руководство пользователя

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Scope and Multimeter Operations Triggers
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9.10.1 Trigger Setup Menu
To access the trigger setup menu:
•
Select the Trigger Setup Menu icon from the control panel, or
•
from the upper toolbar select Setup > Trigger
1— Source :
- Trace 1 to 4 —sets the trigger for the applicable channel.
- Cylinder —sets triggering to the firing of a cylinder detected by the
optional RPM Pickup or Secondary Ignition Adapter.
- None —switches triggering off.
2— Mode —sets the method of triggering:
- Auto —see
Trigger Auto/Manual on page 123
- Manual —see
Trigger Auto/Manual on page 123
3— Slope —sets triggering to the rising (top icon) or falling (lower icon) slope of
the signal waveform.
4— Vertical —sets the vertical trigger position
5— Horizontal —sets the trigger timing position (left and right on the grid)
6— Back —closes Trigger Setup Menu
Figure 9-42
Trigger setup menus
Trigger Auto/Manual
NOTE
The Auto and Manual Trigger modes allow you to set the criteria used to
display signals on the screen. To change the trigger mode, the trigger must be
set on one of the channels.
In both Auto and Manual Trigger mode the screen is updated when the signal
crosses the trigger point in the selected direction (rising or falling), however:
•
Auto Trigger —(default mode)
–
when Auto Trigger is on, even if the signal does not cross the trigger point,
the screen automatically updates after a short period (allowing you to see the
waveform). When this occurs, the message "Waiting for the trigger" is
displayed on the screen. The trigger point can then be set to optimize
viewing.
•
Manual Trigger
–
when Manual Trigger is on, if the signal does not cross the trigger point the
screen will not update. This allows you to capture intermittent events
onscreen, as the screen only updates when the signal meets your trigger
selection.
NOTE
When using Manual Trigger, it may be easier to initially set the trigger point
using Auto Trigger, as the screen will update regardless if the signal crosses
the trigger point. Once the trigger point is set, then switch to Manual Trigger
mode.
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