Depth finder interfering with GPS?

[Giant_Jackpot]

Has anyone ever experienced any interference between your depth finder and GPS? I installed a new Humminbird Matrix 37 in my boat last week. The first time I had it on the lake I could not get my GPS (Garmin GPS 12) to locate any satellites. When I turned the depth finder off, the GPS started working. Humminbird suggested that I upgrade the software in the graph but that only helped a little. If I get the GPS about 3 feet away from the graph it works OK but is not very convenient.

Any thoughts?

[Rick]

Moving to Equipment forum.