try this program, it will do what you want and it's free,
http://bellsouthpwp.net/k/d/kd5eis/
Steve
I'd like to set up a 780XLT and computer to take a frequency survey.

Essentually I'd like to set it up so that it scans a given band of
frequencies when I'm not around, counting the number of hits vs
frequency and perhaps recording the hits for later listening.

(A way to discover new/changed frequencies that isn't time/manpower
intensive.)

Does such software exist? Would another/different scanner be easier?

-Donald