c1steve,
Yes, the DI-FFAMP Chirps between 26.6 kHz to 242 kHz and is compatible when programed to work with the R409C-LWM. The R409C-LWM Chirps from 40-60 kHz on Low Frequency, and 80-130 kHz on the Medium Frequency.
I hope this information is useful for you. :cool
-Deep Blue