fsk demodulate

[question]

Hi !
Is there any function to analyze fsk signal in labview6.1?

[JRA]

I have never done this before, but I found some links on NI's website which can hopefully lead you in the right direction:
How Do I Change The Frequency Output Of My Pulse Train On The Fly?
Frequency Shift Keying (FSK) with ComponentWorks

[Ben]

I do not think there is anything out of the box to do this.

How about;

1) Pass signal to two notch filters set for the two key frequecies.

2) Get amplitude of the outputs of both of the above.

3) wire both to a compare function.

With the appropriate timing control, you are there.

Ben

Have you concidered using a modem to convert the FSK?

[Ben]

Even better,

Extract single tone then compare resulting freq value with limits.

Ben