I am having problems with the sonar screen on two Lowrance units connected together through a broadband, 2 transducers and a transducer switch. When the depth changes, the settings automatically change (appears to be surface clarity, noise rejection etc,)For example: when we are deeper than 20 ft of water the screen has a bunch of clutter and the fish show up well, but when we go shallower than 20 ft the settings change and much less shows up on the screen, The same happens around 10 ft etc..... The screen does from dark blue to white losing a lot of its sensitivity and then back again when we get deeper.

I am sure its probably one of the settings but I just cant figure out which one. Whenever I change a setting it automatically changes back when we change depth.

Also are there any differences in the settings (sensitivity, noise rejection, surface clarity, etc...) when you add the broadband?

i don't know if this will help but i had a hummingbird a fews yrs ago that kept changing the depths automatically so i turned off the auto depth control.....