User's Manual
Chapter 2 Function Reference — GPCTR_Set_Application
NI-DAQ FRM for PC Compatibles 2-244
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 National Instruments Corporation
• ND_SECOND_GATE to any legal value listed in the GPCTR_Change_Parameter function 
description.
•
ND_SECOND_GATE_POLARITY
to ND_NEGATIVE. Measurement will be performed on 
the active low pulses.
•
ND_BUFFER_MODE
to 
ND_DOUBLE for circular buffer operations.










