Increase default min amplitude in sinefit

src/sinefit.py

@@ -25,7 +25,7 @@ def main(argv = None):
                        help='Maximum valid frequency '
                        '(default: approximate frequency * 2))')
     group.add_argument('-a', '--min-amp', action='store', type=float,
-                       default=10.0,
+                       default=20.0,
                        help='Minimum signal amplitude (default: %(default)s)')
 
     # Parse arguments