The accuracy of the sweep is determined by the following sweep settings:
Samples per period
The settings Minimum and Maximum define the minimum and maximum number of samples that are used for one period of the signal. Higher numbers will result in a more accurate sweep, but changes to sweep properties will take a bit longer to take effect.
Limit to
The maximum number of samples used for a sweep can optionally be limited to a user defined value. A higher number will result in a more accurate sweep, but changes to sweep properties will take a bit longer to take effect.