The range of the XM generator without using a wave cycle multiplier is 0.00001 Hz - 5,000,000 Hz.
With the use of the wave cycle multiplier, you can go from 0.00001 Hz - 25,000,000 Hz before you start to loose power and accuracy.
The decimal resolution is 5 significant digits when you are below 600 Hz. After this, the decimal resolution is 2 significant digits.
For more details, please check the link: