At FL300, approaching one station, got very minor CDI scalloping starting at around 9 DME slant range. At 5.1 DME had several full scale CDI oscillations, then the wording (no actual pointer flag, just either TO or FROM on bottom right of ND) "TO" disappeared momentarily, then came back, then switched over to "FROM", with several more full scale CDI deflections.
So essentially raw data.