Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 2: General operation
DMM7510-901-01 Rev. B / May 2015
2-143
Setting up triggers
You can use the Trigger tab of the Graph menu to begin a single acquisition of data based on
different trigger sources.
This section describes in general how to set up triggering. It does not describe details on the trigger
sources.
For detail on the digital I/O, refer to
(on page 3-47).
For detail on the External I/O, refer to
(on page 3-59).
For detail on TSP-Link, refer to
TSP-Link System Expansion Interface
(on page 3-104).
For detail on analog triggers, refer to
(on page 3-64).
You can set triggers to be generated from the:
•
Display TRIGGER Key: The trigger occurs when you press the TRIGGER key.
•
External Digital: The trigger occurs when an external stimulus is detected. The external pulse can
come from a digital input line, TSP-Link input line, or the rear-panel external input line.
•
Waveform: Select an analog edge, pulse, or window to trigger. Analog triggers are only available
for the DC voltage, DC current, digitize voltage, and digitize current functions.
When you set up triggers through the Trigger tab, the instrument defines the LoopUntilEvent trigger
model template with the trigger settings. Readings are placed in the active reading buffer. If a trigger
model exists, it is replaced by the new settings.
When you set up the Trigger tab, settings are not applied if you press the
EXIT
key. However, the
settings are retained and displayed when you return to the Trigger tab. Select another Graph tab or
press
MENU
or
HOME
key to leave the Trigger tab and apply the changes.
To set up triggers to occur when the front-panel TRIGGER key is pressed:
1. Press the
MENU
key.
2. In the View menu, select
Graph
.
3. Select the
Trigger
tab.
4. Set the Source Event to
Display TRIGGER key
.
5. Set the length of the
Delay
that occurs before each measurement. 0 sets no delay.
6. Set the
Position
. The position marks the location in the reading buffer where the trigger will
occur. The position is set as a percentage of the active buffer capacity. The buffer captures
measurements until a trigger occurs. When the trigger occurs, the buffer retains the percentage of
readings specified by the position, then captures remaining readings until 100 percent of the
buffer is filled.
7. Set the
Trigger Clear
behavior. Select
Enter
to clear previously detected trigger events when
entering the wait block; select
Never
to immediately act on any previously detected triggers and
not clear them.
8. To start the measurements, press the
TRIGGER
key.
9. Select the
Graph
tab to view the readings.
10. Press the
TRIGGER
key to initiate a trigger. The trigger point is indicated by a small triangle
above the point.
