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1. 1. 3. 2 DAQ Trigger
As previously explained, the user can configure the trigger for the acquisition. The available trigger
modes for the DAQ are show in Table 7).
DAQ Trigger Mode
Option
Auto (Immediate) The acquisition starts automatically after a call to function
Software / HVI Software trigger. The acquisition is triggered by the function
Hardware Digital
Trigger
Hardware Analog
Trigger
Table 7: DAQ trigger modes (parameter triggerMode in function DAQconfig,
As show in Table 7, the user has the following options for hardware triggers:
Hardware Digital Trigger: If the DAQ is set to use a digital hardware trigger, the
user must configure it using the function
The available digital hardware trigger options are shown in Table 8 and Table 9.
If external I/O trigger is selected in DAQdigitalTriggerConfig, the user must con-
figure additional settings of this particular I/O line, such as input/output dir-
ection, sampling/synchronization options, etc.
Hardware Analog Trigger: (Only products with analog inputs) If the DAQ is set to
use an analog hardware trigger, the user must configure it using the function
DAQanalogTriggerConfig (page
responding analog input channel must also be configured.
DAQ Hardware Digital Trigger Source
Option
External I/O
Trigger
PXI Trigger
Keysight M31XXA/M33XXA Digitizer User's Guide
Description
DAQstart (page 53)
DAQtrigger,
DAQtrigger (page 63)
running. DAQtrigger can be executed from the user applic-
ation (VI) or from an HVI (see HVI details,
Overview (page
24))
Hardware trigger. The DAQ waits for an external digital trig-
ger
Hardware trigger. The DAQ waits for an external analog trig-
ger (only products with analog inputs)
Description
The DAQ trigger is a TRG connector/line of the product
Triggers (page
15)). PXI form factor only: this trigger can be
synchronized to CLK10, see Table
PXI form factor only. The DAQ trigger is a PXI trigger line
and it is synchronized to CLK10
1 Theory of Operation: M31/M33XX Digitizers
provided that the DAQ is
HVI Programming
DAQdigitalTriggerConfig (page
(I/O Triggers (page
50). The Analog Trigger Block of the cor-
Name
(I/O
TRIG_EXTERNAL
TRIG_PXI
Programming Defin-
itions
Name
Value
AUTOTRIG
0
SWHVITRIG1 1
HWDIGTRIG 2
HWANATRIG 3
Section 2.4.5.4
)
49).
15)).
Value
0
1
11
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