Separate onion into rings.
Combine pancake mix, salt, and 3/4 cup cold water in bowl.
Beat about 2 minutes.
Dip onion rings in batter; drain.
In skillet that is at least 3 inches deep, heat 116 inches of oil to 375°.
Fry onion rings till brown, 2 or 3 minutes.
Drain thoroughly on paper toweling.