Dwell 180
Duty 90
backfreq b 2400000 90
Your frequencies from CAFL.
Just change the bottom line to whatever frequencies you are using. This will run each frequency for 3 minutes with a 90% duty cycle. And a 2.4 MHZ carrier wave at 90% duty cycle.
This is for the F165 frequency generator. Same carrier and duty cycle that the GB-4000 uses on the Cancer PDF.