E600, 11" coil, Minelab wired headphones, Park1 and F2 at 2. All default settings. Found 2 clad quarters, 4 pennies, other metal scrap. Steel bottle caps produced a choppy signal that included some chirps. No mistaking the caps for good items. Of course, not every ambiguous or choppy signal should be skipped. The Guide recommends using all metal to take full advantage of F2 so I tried that for while. Went back to discrim pattern to screen our other junk items.