It seems like this question is related to the usage or configuration of the "Frex16" program. Without specific knowledge about Frex16, it's difficult to provide an exact reason for needing to cap the frequency under 22, especially in the context of Lyme frequencies. Typically, frequency limits could be due to the program's design or technical constraints, ensuring safe or effective use parameters. For a precise answer, you might want to consult the program's documentation or contact their support for more detailed information regarding frequency settings and their impact.
