Kurt,
I have had my Eagle II sl since 1989. By no way am I an expert on it. Did you get a manuel with it? If not you can down load it from White's site.
1. Turn on detector. wait for air prompt. ( don't hit it yet )
2. Use Audio Mode to select Starting programs A- coin & jewelery B- Prospecting & Relic, C- Beach
3. Use Air Mode (now)
4. Use Ground Prompt (now)
5. Use Audio Mode to chose different audio thresholds A- continuous tone, B- silent tone, C- tone ID
The biggest hint I can give you is to keep the coil moving don't go slow. After you get a good solid tone by moving the coil back and forth use the switch on the handle to pin point target. Watch the depth meter. When the depth meter is at the swallow-est depth the target is right in the center of the coil. ( BIG HINT ) Now release switch and bounce the coil up and down off the ground if you still get a solid tone the target is good ( coins, rings, Jewelery ) if the target breaks up then it is bad ( pop rings, foil, chopped up tin cans ). The only thing that will fool you is screw caps.
Gary