Accu-Tweaker anomoly

[Newton Hunt]

I have been experiencing this with my two SATs.  The problem is that the SAT is
not picking up a phase of the Hz being measured.  Move the SAT to the bass
damper area and it should light up.  The SAT works by comparing the phase of
the income Hz with the phase of the internal Hz.  If it cannot hear a
particular phase of the note being played it will display nothing.  Move the
unit around until you find a position where it can pick up a phase of the note.
      Newton