Interference between two Helix 7 units. Need advice.

Im fairly new to boating and very new to fishing electronics so bare with me.

I just installed a Terrova that came with i-pilot link and a MEGA DI transducer built in. Its hooked up to a Helix 7 CHIRP MEGA DI G4N at the bow. At the helm I have a Helix 7 CHIRP G3 (non DI/SI) with the included transducer installed at the transom. Both units operate perfectly on their own. As soon as both are on, I get a ton of interference. I read that this has to do with them using the same frequency so thats kinda where my question comes in.

I fish freshwater lakes in California and the max depth is around 80 ft. Im not entirely sure what frequency to operate either unit at. I tried playing around with the settings a little bit while I was out on the water today but don’t really know what I am doing and I was way too taken aback by the amazingness of i-pilot so I focused more on that. Ive watched several “how to set up your FF” videos on youtube but still havent really found anything helpful. Any suggestions?

p.s. I also included a picture of the sonar when it seemed to ping fish stacked vertically. Is that just interference? Or were the fish really stacked like that?

PICTURES: https://imgur.com/a/GrLtBPE (sorry, they were too big for the Forum)

It looks like interference to me. Do you have interference on both displays?

I think there may be a Chirp IR (Interference Reject) setting under “sonar” that can be adjusted and it may help. If not there may be a noise reject setting under sonar that may help.

Either way, look for interference reject or noise reject settings under “sonar” and try adjusting them.

Karry Kyllo wrote:

It looks like interference to me. Do you have interference on both displays?

I think there may be a Chirp IR (Interference Reject) setting under “sonar” that can be adjusted and it may help. If not there may be a noise reject setting under sonar that may help.

Either way, look for interference reject or noise reject settings under “sonar” and try adjusting them.

Ah, I’ll have to check that out. Thank you!