Per HB CS: "The Generic Chirp transducer would require the use of the SM3000 sonar module and an Airmar Chirp Transducer."
My unit lets me select those settings, but don't know if the Generic settings actually do anything or not. There is lots of learning and reviewing with just the HB CHIRP settings anyway. Mine is set on CHIRP Auto-Congifure and does pretty darn good. Lots of fish arches without much effort.