High accuracy duty cycle with DAQ-STC

[bostonscot]

I am trying to measure the duty cycle of a 4 kHz TTL pulse train with high accuracy. I can do this over one cycle but actually need to average over a number of cycles because there is noise. This doesn't seem possible with the stanard VI's? Can anyone help?
Thanks,
Gavin

[Molly K]

Gavin,

There is an example on our website that does buffered duty cycle measurement on DAQ-STC devices that should be helpful for you. From www.ni.com/support you can search under Option 3 through Example Code for +duty +cycle +stc to find it or follow this link: E Series Duty Cycle Example

Regards,
Molly K.
National Instruments
Applications Engineering