Quote Originally Posted by rnvinc View Post
Remove the xducer and all xducer cabling from the TM ...

Hang the xducer in the water away from TM ... and make sure the cable isn't close to any part of the TM, it's wiring, or pedal ...

*If the interference goes away = the encroachment path is thru the xducer or xducer cable ...
*If the interference is still present = the encroachment path is thru the Sonar power system somewhere ...

Rickie
This will tell you for sure which tree you need to be barking up. I'm running an MG x3 variable and Garmin 93sv. I never see interference all spring and summer, in the fall I move to a deeper lake and in the past would see spikes when hitting on button. I only see this when I get above 12 or so feet. I verified thru the above process. Made some cable path changes over the winter and will see next month. Mine was only present on 2d btw. Lots of good advice here. You can get interference from any brand of either product. Other variables also play into the equation beside name. What Rickie said is one of the best 'no money spent' ways of finding out where to look.