Croc

Thanks all . I'm in FE set at 1 I do ground balance but it's hard to find a clear spot when you can hear iron everywhere. I detect mostly on pasture land . What is meant by ground noise? It does read -2 ,-3 etc

New to this so hello everyone😁 On my Nox 800 I detect in field 2 iron bias f1. Sensitivity 23 I detect with discrimination on until I find a target of jumpy I hit horseshoe to see if it registers iron trouble is it does everywhere with every swing even away from target it's done this since I've had detector (6 months)on every field. I nearly didn't dig a silver coin yesterday makes me wonder how many good things I've not dug. Hope someone can help. Thanks Croc