I'm trying to measure the angle between two signals. I try the cross power sprectrum vi but it gives me an array. The two signals are 60Hz and the correct answer is on item 6 on the array. When I change the frequency of the signals to 20Hz, the correct answer is found in term 2 of the array. I tried with odd frequencies like 44 and did not found the correct angle in any element of the array. Can you please let me know how to get the correct answer or how to interpret the array.
