no idea, but some tips for ya. try to keep the gain to a minimum on each one. try to use narrow beam on both. try to keep the transducer at the top of the ice hole to allow the ice to help reject stay signals. i use an arm meant to do this and keep it center. you could off set the placement to one side or the other to help allow the ice to reject the stay signals even more. having it on the same side as the other sonar should give more rejection. hanging it below the ice plate will not help at all and will make matters worse.
i don't use either sonar, but the one i do use uses channels, not strengths when you dial it to what one would think is up. so try all the different values each one offers to find the one that works for it when tuning the interference rejection.
if you have them both, then trying ideas is all you can do.
