Waveform Frequency Measurement

[Valerio Nobre]

Hi,

  are there any VI witch perform waveform frequency measurement? I tried the express vi "Analyze  >> Waveform Measurements >> Timing and Transition Measurements", but when the waveform sampled is 16.65MHz and it shows about 16.49...MHz. How can I take a better precision in this measurement?

[Tareq]

Hi,

What is the maximum sampling rate for the data acquisition card you are using for this application. If you don't know can you just send me its number. because if you are reading a signal with frequency higher than twice sampling rate you will have wrong reading "Aliasing". if you checked the previous requirments for correct acquisition you can try using "extract single tone information.vi" located in the Functions>>all Functions>>Analyze>>Waveform measurements.

good luck

Tareq