Yes, I'm testing to see if a rotating field is created within a Delta T antenna if the X and Y coils are fed signals 90 degree phase offset from each other and the Z axis fed with white noise as described in the first paragraph of the OP in the thread
Delta-T Antenna (T.E.C.). That post can be confusing because that description is then followed by a picture of 4 coils with phase offset similar to the way you describe (and introduces other elements as well). I will also be testing the variation I describe beginning of this thread - each of the coils of the 3-coil Delta T antenna replaced by a pair of coils in series spaced apart at Helmholtz optimum. So, 3 sets of pairs of coils, 3 signals needed, sine+cosine+white noise.
This does suggest another signal configuration to test once the more precise set of coils is constructed, though - the 4 X/Y coils run independently and not in series with Sine, Cosine, Phase Invert, and 270 degree offset signals.