ADLINK PCI-9810 - Manual (Page 71)

Function Reference 59
trig_pol Trigger slope.
trig_lvl Trigger level. Refer to section 4.1.
post_trig_cnt Post trigger count. This value is pre-loaded to the
post trigger counter when the post trigger counter
register is written. It will count down on the rising
edge of ADC sampling clock after the trigger
condition is met. When the count reaches 0, the
counter stops. The counter is used to control the
delay time in delay trigger mode and to control the
post trigger sampling count in middle trigger mode.
Return Code(s)
PCICardNumErr
PCICardNotInit
InvalidClkDiv
NoError
AUX_TRIG External digital trigger
0 Positive slope trigger
1 Negative slope trigger