Acqiris SA240P - Trigger Output

5.3 Trigger output
Acqiris SA240P User's Manual 59
5.3 Trigger output
A trigger output pulse can be generated for external synchronization.
When the ADC card is ready to be triggered and a valid trigger signal occurs, a trigger output pulse
is generated. This signal is available on the front panel TRG OUT MMCX connector,and may be
enabled or disabled as required.
In idle state, Trigger Out signal is low. When a trigger is accepted a high level pulse occurs.
There are several trigger sources or signals which may be assigned to the trigger out connector
(See table below).
Trigger out sources Description of signal
TriggerAccepted (default) A pulse signal is sent directly to the Trigger Out.
TriggerAcceptedResync
A pulse signal resynchronized to a sub-multiple of sample clock is sent
to the Trigger Out.
TriggerCompare
The trigger input condition has been satisfied, but not necessarily
triggered, e.g. the trigger enable was not asserted.
SelfTrigger See Self trigger mode (page 25).
Table 5.2 - List of supported trigger out signals.
Trigger output signal behavior
By default, the trigger output is LowLevel.
If selecting a trigger output source, e.g. TriggerAcceptedResync or TriggerAccepted as trigger
output source, when the ADC card is ready to be triggered and a valid trigger signal occurs, a trigger
output pulse is generated.
Selecting the trigger output source
The trigger output can be selected using following properties / attributes:
Driver Attribute / Property Available Instance Value
IVI-C
AQMD3_ATTR_TRIGGER_OUTPUT_ENABLED Boolean
AQMD3_ATTR_TRIGGER_OUTPUT_SOURCE
TriggerAccepted, TriggerAcceptedResync,
TriggerCompare, SelfTrigger
IVI.NET
IAqMD3TriggerOutput.Source
IAqMD3TriggerOutput.Enabled Boolean