I recently acquired a very nice frog7 (unmodified/unmolested). There is one function/feature that seems uncoventional. The front end "ATTEN" switch positions offer maximum sensitivity in the "NOR"(mal) position, and about 20db down in the "LOCAL" position, and 10db down in the "DX" position. Since I thought the "DX" position should offer the maximum sensitivity, I checked the schematic, and it sure looks as though the frog is functioning as designed, with attenuation of signal in both the "LOCAL" and "DX" modes, and unattenuated (maximum sensitivity) in the "NOR"mal mode. Can anyone confirm that what I'm observing on this frog is typical/normal for the frog7?