NI's DAQ board provides a wealth of resources to measure the duty cycle of PWM Wave, such as analog acquisition, digital IO, and counters. The R series FPGA boards and cRIO can also be used. We can change the duty cycle according to the following four methods：(a) Using a counter to measure the duty cycle(b) Using analog acquisition to measure duty cycle (c) Using Scan Interface to measure the duty cycle (d) Using the FPGA to measure the duty cycle (a) Using a counter to measure the duty cycle
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