Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 106)

daqAdcSetTrig
Also See: daqAdcSetAcq, daqAdcSetTrigEnhanced,
daqAdcSetScan, daqSetTriggerEvent,
daqAdcSoftTrig
Format
daqAdcSetTrig(handle, triggerSource, rising, level, hysteresis, channel)
Purpose
daqAdcSetTrig configures the device for enhanced triggering.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device for which the ADC
acquisition trigger will be configured
triggerSource DaqAdcTriggerSource Sets the trigger source
rising BOOL Boolean flag to indicate the rising or falling edge
of the trigger source
level WORD The trigger level (in A/D counts) for an analog
level trigger
hysteresis WORD Hysteresis value for an analog level trigger (if
selected)
channel DWORD Channel for which the analog level trigger will be
detected (if selected)
Parameter Values
handle: obtianed from the daqOpen function
triggerSource: see table below
rising: valid values are either true (
≠ 0) or false ( = 0)
level: valid values range from 0 to 65,535
hysteresis: valid values range from 0 to 65,535
channel: valid values range from 0 to 271
Parameter Type Definitions
trigSource-(DaqAdcTriggerSource)
Definition Devices Description
DatsImmediate All
Post-trigger data acquisition begins immediately upon invocation of the
daqAdcArm command (no pre-trigger data acquisition is possible with this trigger
source)
DatsSoftware All
Post-trigger data acquisition begins upon a software command issued by the
calling application (see daqAdcSoftTrig)
DatsAdcClock All
Post-trigger data acquisition begins immediately upon invocation detection of the
Adc Clock pulse being driven.
DatsGatedAdcClock
DaqBooks
DaqBoard(ISA)
Post-trigger data acquisition begins immediately upon invocation detection of the
Adc Clock pulse being driven.
DatsExternalTTL All
Post-trigger data acquisition begins on the selectable edge of an external TTL
signal. Refer to the applicable user’s manual for pinouts showing the location of
the external TTL signal connection.
DatsHardwareAnalog All
Post-trigger data acquisition begins upon a selectable criteria of the input signal
(above level, below level, rising edge, etc.)
DatsSoftwareAnalog All
Post-trigger data acquisition begins upon a selectable criteria of the input signal
(above level, below level, rising edge, etc.)
Returns
DaqError See Daq Error Table.
4.2-50 Daq API Command Reference 988594 Programmer’s Manual