BNC 2121 and PCI 6602 for counter application

[gbzheng]

Hi, 

I am trying to develop the counter application to count how many pulse rising edges given a specific time period.

I have setup the computer with the connection of BNC 2121 and PCI 6602.

The output of my device is the pulse train, where a failing edge denotes one bit error. My objective is to count how many errors given a specific time period.

 Is there any vi example to start with? 

BTW, I have tried one example, count digital events.vi. But I can not observe any output error counts. Please help!

Thanks!

Guanbo

[gbzheng]

Anyone can help? Thanks a lot!

[CoffeeBreak]

Hi gbzheng,

I think I need a little clarification for your request to better answer your question. Are you trying to count both rising and falling edges in a specific time period, or are you just trying to count the falling edges (errors) in a specific time period?

DAQmx Shipping Examples

If you need deterministic timing using an external clock, I would recommend using the Counter – Count Edges (Continuous Clock) example.

If you do not need the deterministic timing, you could just use the software timed Counter – Count Edges example.

For either example you will need to create a constant (or control) for the edge input on the DAQmx Create Virtual Channel.vi. You will need to specify Falling as the edge type because rising is the default value.