Need help with this project - boat has 2 Raymarine monitors and a Furuno Sounder monitor. The boat has a flybridge camera, FLIR, underwater camera and sat tv all connected through these 3 monitors & salon tv. For some reason I get interference (jumping and fluctuating screen) on the raymarine monitors whether it's on the sat tv, flir, fb camera. The fb camera, uw camera, flir and sat tv all have their own Pyle 12v video amp. Each amp has 12v power, 1 -video in and 4 - video out. Tried replacing connectors, changing to a seperate fuse panel, placed small efi magnets around video in coaxial cable, replaced pyle amplifiers, etc. When using the raymarine monitors for regular use (chart, plotting, sounder, etc) there is no fluctuation.
If its switching from 16:9/widescreen to 4:3/full screen ratio you'll need to turn off the "auto aspect ratio". It's in the settings soft key on raymarine. Also Flir will "wash" the screen every 5 to 6 minutes.
I can almost guarantee that your A/V cable is running alongside 110 or 220 volts and that is where it's picking up the interferance.
Check the Frequency (refresh rate)of the monitors and be sure they are the same. This can be just a software issue or with some screens it's a hardware design. Many times some screens run @ 60 hertz while others are @ 80 hertz. (many monitors can handle more than a single frequency,but not all) The mis-matched frequency (refresh rate) can cause artifacts , cause monitors to shut down or even damage hardware over time from extra heat of a higher frequency..
