Can't receive the sent IQ data at the receiver

hi
i am new to this community and NI 5640 R
i am using the card for the transmission of IQ array of 12880 elements in the array
I want to receive this array in the receiving VI.
I am unable to receive this IQ array. I think i am not setting the parameters right?
parameters like IQ rate at transmitter and
IQ rate and samples to acquire at the receiver
I am using the sample VIs single tone generation and spectrum analyzer of NI 5640
made some changes in the spectrum analyzer VI to get IQ array
plz help me on this because my final project depends upon it
Best Regards
Imran Ul Haq
Air University Pakistan

Hi
I’ve posted another example that modulates and demodulates a PSK waveform in another posting. It shows sending the waveform to the NI 5640R’s DAC and acquiring the NI 5640R’s ADC and then demodulating the data. Due to a difference in phase between the NCOs in the DAC and the ADC, you will not see the exact same IQ samples that you generate on the receive side.
The Modulation Toolkit VIs use a Synchronization system for the receive side to determine the phase offset on the receive side and correct for that. I recommend looking at the Modulation Toolkit example VI that this example is based upon for more information on synchronization.
The example’s post:
http://forums.ni.com/ni/board/message?board.id=ifrio&message.id=801#M801
Jerry

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