Quote Originally Posted by fishfood View Post
My pings are just like that. The trolling motor interference comes and goes but I can live with it. In fact the final install will not be on a trolling motor so that's not an issue. The pings though when the other unit is running is a huge issue since the final install will be next to another transducer.
Which other sonar and transducer is causing the pings? You might want to try changing the frequencies on the other unit to see if that helps. Also play with the Noise Reduction settings on the PS21.