Testing alternator and excessive AC ripple?

Okay results testing at alternator output stud. At idle 14.7 volts DC, 106-115 varied AC. With lights in at idle 14.3 volts DC no noticed change in AC. At fast idle 15 volts DC, 135 to 150 AC, no noticeable change with headlights on. Is everything working correctly. Any other tests to do?