Hello there, I have a 4' radar antena with a

Press and hold the alarm key whilst powering up. Also try it with the clear key while powering up again.

n the system setup, under “UNITS” I set BEARING to “MAG” (magnetic). This will cause the unit to display course / bearing information in relation to the Magnetic North and match magnetic compass readings. It is not the same as True North! One has to be careful with this setting. There are a number of areas where the earth's magnetic field is locally disturbed, sometimes very significantly. Your GPS may not account for it. - again, under “UNITS” I set “METRIC”.

You must have a heading sensor input for radar/chart overlay. (i.e. PG500)

No it does not output any type of radar video data.

Maybe you backup batterie inside you plotter is low If yor plotter shows you that you are somewhere in Afrika on the atlantikcoast you have to change only the battery inside the plotter it kost few euro.
The next possibility is that you have problems with you extern gps antena look after broken kable or try it with another Gps antena

you must use a serial to USB adaptor go in to data 1 or 4 network connector is ethernet protocol!

1. you must have the latest software 4.29 the new scanner dont work with the old Software.
2. Be shure that you have really put in the connector of the cable inside the plotter its not so easy.
3.
try the plotter on an nother boat with an working system than you will know if its a problem with the antena or Plotter

Yes the output forom the Furuno GPS (like a GP31) will be yellow and green, hook these to theinput on the plotter blue (or black) and white. Use Data1 on potter as the input and select a nav source of "ALL" in setup menu.

If this is on the radar screen, you'll have to set your heading alignment on your radar. The radar may be 180 degrees out. if this occurs on the plotter, then if you have a heading sensor attached or an autopilot, your heading may be off.

Try adjusting the GPS position offset in the GPS Sensor Settings Menu.