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Receiving wrong bits while demodulating using FSK

Hello,

 

I am trying to send and receive a character string using FSK modulation and demodulation. What I observe is that if I send a 1 character(8 bits), I receive only 2 bits and it get converted to wrong string. Hence, I add user defined PN sequence (all 0's) to the string so that I miss the last 6 bits of PN sequence and can get the string back. But the received string fluctuates between the actual string and some garbage values.

Can anyone help with what is wrong here ? It's very urgent. PLEASE HELP!!

The .vi file attached herewith.

 

Thanks!

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