measure analog frequency with PCI or USB

[andyh]

I would like to continuously measure the frequency of a 0-5V square wave from zero to about 4 kHz.  I don't need to record the waveform, only obtain frequency.  The hardware at my disposal include:

1) PCI-MIO-16E

2) DAQCard 6062E

3) USB-6218

Can any of these devices do this?  This seems like a very common task, why can't i find the perfect example to do this.  I'm not having luck with the DAQ assistant. Can someone point me to a simple example?

[Ray.R]

Here is a link to an example for the USB

http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=124452#M124452

And some general info here (with a basic example):

http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=291603#M291603

[Ray.R · Accepted solution]

You may also want to read the following link:

Making Accurate Frequency Measurements

And look at the examples within the zip file here

http://sine.ni.com/devzone/cda/epd/p/id/5000

[andyh]

Thanks for the help.  I'm not sure why that was so difficult to find.  The Labview built in examples seemed to steer me the wrong way.

[Ray.R]

Glad to help.

You can also do searches within this forum.  There's quite a few examples available.