cDAQ 9174 CtrlInternalOutput duty time

Hi everyone,

I am new to the LabVIEW coding. I have a application for analog data sampling with cDAQ 9174, NI 9401 and NI 9215 programmed by my former colleague. In this app, he set the rate and duty cycle of a counter in NI 9401 but used cDAQ-9174/CtrlInternalOutput as the sampling clock source for analog data input. But he just set the sampling rate in DAQmx Timing VI for analog input task. Does anyone know how to know the duty time of cDAQ 9174 internal counter 1. Was the duty cycle of  cDAQ-9174/CtrlInternalOutput related with that in NI 9401 counter 1?

Thanks very much.