I think I got ya! So.... ur saying that my stock transducer is capable of sending a 800khz signal, just not capable of recieving it back to develope a nice image? So I will be needing to upgrade my transducer. I wish I would have known about the trade in option when I bought my graphs. They were just so new to me when I got it, the only thing I knew about them was that they came in a box. hahahahah