Thank you very much Andrew. I will perform the tests, and then I will send the results ...
Best Regards Rolando Paz 2014-02-18 1:24 GMT-06:00 Andrew Martens <[email protected]>: > Hi Rolando > > Congratulations > > > How I can confirm that the correlator function properly? >> > > A good way to test a correlator is to do the following; > > 1. Get a wideband noise source and add a low pass filter so that the > signal will fit into the bandwidth of your system. > 2. Split this signal and feed it into two inputs of your correlator. > 3. Capture the output of the correlator and plot the phase > (arctan(real/imag)) of the cross product of the two input signals. > 4. The phase of the cross product in the bandpass of the filter should be > quite clean and close to 0. Outside of the bandpass of the filter the phase > should be noisy. > 5. Now lengthen one of the two signal inputs into your system by making > the cable longer. > 6. Capture the cross product of the two again. The phase in the filter's > bandpass should still be clean but should have a slope in it. > 7. Making the cable difference larger should make the slope steeper. > Removing the cable difference should make the phase slope return to 0. > > Cheers > Andrew >
