... You are here: start €Ё difx €Ё difx2.0phasecal . ... difx:difx2.0phasecal . Phase cal tone extraction is soon to be added to DiFX2.0. ... The phase cal tones fall on integer MHz boundaries. ... This allows the computed phase cal values to be picked up by difx2fits . ... However, none of them match well to the тАЬunpack, FFT, XMACтАЭ cycle used in DiFX, since the repetition period of the phase cal tones is typically larger than an FFT length in DiFX and is never a power of 2, as the FFT must be. ...