We are running a 19" TZ touch 3 using it's built in fish finder connected to a B275LHW. We are getting a second return of the bottom as you can see in the pictures. We also have the DFF-3D running and it does not show multiple returns, it looks normal. Both are in "Auto". When I switch the Chirp to "Manual" I can adjust the depth to put the single bottom return toward the bottom part of the screen to create a nice normal screen. What are we doing wrong? I'd like to "auto" setting to not show the double return.
First picture is 275, second is DFF3D
First picture is 275, second is DFF3D