Basic RTAs show three measurements per octave at 3 or 6 dB increments; sophisticated software solutions can show 24 or more measurements per octave as well as 0.1 dB resolution.
Basic RTAs typically display three measurements per octave at 3 or 6 dB steps; more sophisticated software can present up to 24 or more measurements per octave and achieve a resolution of 0.1 dB.