Frequency measurement

[dboulay]

Hi,

I modified the examples "Count and period - crio" to measure the frequency of a digital signal. The frequency measured (about 42.4 Hz) is 4 time higher then the input (about 10.6 Hz).  Is an error in my program?

I use the module 9411 on a 9104 with the 9012.

Daniel

[Wiebe@CARYA]

Perhaps the input signal has jitter on it? If you put a wait inside the upper true case (when the edge is > that the previous), for instance 10 ticks, the jitter will be ignored.


Regards,


Wiebe.

[Rudi_N]

dboulay:

Feel free to post again if you are still experiencing issues.

Regards,

Rudi N.

[Rudi_N]

Message Edited by Rudi N on 05-08-2007 06:57 PM

[Rudi_N]

Message Edited by Rudi N on 05-08-2007 06:58 PM