Maybe this is a better description synchronisation is the ability to keep the props at the same RPM within limits of about 20 RPM. Syncrophasing is to align each prop at a certain phase to that they do not run at the exact phase. Normally when one prop is at the top at lets say 12 o'clock or at 0 degrees then the othe prop should be just behind it at about 2 o'clock or 40 degrees. They should not be in the same phase and by doing all of these you reduce the vibration and noise caused by between the relative air flow and the chordline or angel of attack.
Maybe this is a better description synchronisation is the ability to keep the props at the same RPM within limits of about 20 RPM. Syncrophasing is to align each prop at a certain phase to that they do not run at the exact phase. Normally when one prop is at the top at lets say 12 o'clock or at 0 degrees then the othe prop should be just behind it at about 2 o'clock or 40 degrees. They should not be in the same phase and by doing all of these you reduce the vibration and noise caused by between the relative air flow and the chordline or angel of attack.