ahicks - Sorry about that, hope this helps:
The vertical scale represents the timing delay, provided by the ignition module, in one mili-second increments, i.e. on the A-02 chart, the 10 represents 0.010 seconds (10 mSec).
The horizontal scale represents the proprpm at each whole mili-second value, i.e. on the A-02 chart, the rpm of 1000 would have a timing delay of 0.003 seconds (3 mSec).
At a little over 4100 rpm, there is no “programmed” delay from the ignition module due to the time the magnet passes the Hall sensor until the spark plug fires. Any rpm in excess of that provides the maximum advance set by the magnet and hall sensor location relative to the piston TDC which is normally set at 28 or 30 degrees BTDC.
The top chart shows a smooth advance curve which is normal, the bottom chart shows what I believe is an error in the advance curve where the timing delay jumps up to 4 mSec and starts down again.