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recognize the starting point of a QPSK signal

Question asked by Owen002 on Jul 21, 2014
Latest reply on Jul 24, 2014 by algoss
Hi,

I want to sample a QPSK modulated waveform with a DSO9254A and then demodulate it in Matlab. The question is, how to set the starting point of saving data in 9254A to assure there is not useless waste ahead of the modulated waveform. I think maybe trigger is a way but I have to create a special marker before the real waveform. Is it a possible way?

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