OG 360 interference

I have a gen 1 helix 12 for 360 that’s hooked up to a transducer on the transom and I have a gen 1 helix 9 with an SI transducer on the trolling motor. As soon as I turn the helix 9 on the 360 starts to wagon wheel and doesn’t seem to change when I’m adjusting the noise filters. Haven’t had a little of time to try to dial it in but it sucks only really being able to use 1 unit.

I know that on the newer 360 the noise filters are not progressive...that is, 2 is not stronger than 1, 3 is not stronger than 2, etc. Instead each setting accounts for a different range of frequencies. In my case I just had to go through them one-by-one until I found the setting that worked. Good luck!